{"@attributes":{"version":"2.0"},"channel":{"title":"bit-ranger","description":{},"link":"https:\/\/bit-ranger.github.io\/blog\/","pubDate":"Thu, 14 Oct 2021 15:09:46 +0000","lastBuildDate":"Thu, 14 Oct 2021 15:09:46 +0000","generator":"Jekyll v3.9.0","item":[{"title":"\u5927\u6587\u4ef6\u5185\u5bb9\u5bf9\u6bd4\u591a\u7ebf\u7a0b\u7248\u672c","description":"<ul id=\"markdown-toc\">\n  <li><a href=\"#\u7ebf\u7a0b\u6c60\" id=\"markdown-toc-\u7ebf\u7a0b\u6c60\">\u7ebf\u7a0b\u6c60<\/a><\/li>\n  <li><a href=\"#\u7ebf\u7a0b\u6c60\u6d88\u8d39\u62c6\u5206\u4efb\u52a1\" id=\"markdown-toc-\u7ebf\u7a0b\u6c60\u6d88\u8d39\u62c6\u5206\u4efb\u52a1\">\u7ebf\u7a0b\u6c60\u6d88\u8d39\u62c6\u5206\u4efb\u52a1<\/a><\/li>\n  <li><a href=\"#\u7ebf\u7a0b\u6c60\u6d88\u8d39\u5408\u5e76\u4efb\u52a1\" id=\"markdown-toc-\u7ebf\u7a0b\u6c60\u6d88\u8d39\u5408\u5e76\u4efb\u52a1\">\u7ebf\u7a0b\u6c60\u6d88\u8d39\u5408\u5e76\u4efb\u52a1<\/a><\/li>\n  <li><a href=\"#\u6d4b\u8bd5\" id=\"markdown-toc-\u6d4b\u8bd5\">\u6d4b\u8bd5<\/a><\/li>\n<\/ul>\n\n<p>\u8fd9\u662f<a href=\"https:\/\/bit-ranger.github.io\/blog\/algorithm\/large-file-diff\/\">\u4e0a\u4e00\u7bc7<\/a>\u7684\u7eed\u4f5c\uff0c\u5bf9\u4e8e\u8fd9\u4e2a\u7b97\u6cd5\uff0c\u5176\u4e2d\u53ef\u4ee5\u540c\u65f6\u8fdb\u884c\u7684\u90e8\u5206\u6709<\/p>\n<ol>\n  <li>\u62c6\u5206\u540e\u5bf9\u6bcf\u4e00\u4e2a\u5757\u7684\u6392\u5e8f\u53ef\u4ee5\u540c\u65f6\u8fdb\u884c<\/li>\n  <li>\u5408\u5e76\u65f6\u7684\u4e0d\u540c\u8303\u56f4\u4e4b\u95f4\u53ef\u4ee5\u540c\u65f6\u8fdb\u884c\uff0c\u4f8b\u5982\u62c6\u5206\u4e3a10\u4e2a\u5c0f\u5757\uff0c\u90a3\u4e481-5\u5c0f\u5757\u7684\u5408\u5e76\u8ddf6-10\u5c0f\u5757\u7684\u5408\u5e76\u8fc7\u7a0b\u53ef\u4ee5\u540c\u65f6\u8fdb\u884c<\/li>\n  <li>\u5408\u5e76\u7684\u4e0d\u540c\u9636\u6bb5\u4e4b\u95f4\u4e0d\u53ef\u4ee5\u540c\u65f6\u8fdb\u884c\uff0c\u56e0\u4e3a\u4e0d\u540c\u9636\u6bb5\u4e4b\u95f4\u6709\u5148\u540e\u987a\u5e8f<\/li>\n  <li>\u4e0d\u5b58\u5728\u5bf9\u540c\u4e00\u6761\u6570\u636e\u7684\u4fee\u6539\uff0c\u6240\u4ee5\u65e0\u9700\u8fdb\u884c\u5e76\u53d1\u63a7\u5236<\/li>\n<\/ol>\n\n<h1 id=\"\u7ebf\u7a0b\u6c60\">\u7ebf\u7a0b\u6c60<\/h1>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">threadPoolExecutor<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ThreadPoolExecutor<\/span><span class=\"o\">(<\/span><span class=\"mi\">8<\/span><span class=\"o\">,<\/span> <span class=\"mi\">8<\/span><span class=\"o\">,<\/span> <span class=\"mi\">10L<\/span><span class=\"o\">,<\/span> <span class=\"nc\">TimeUnit<\/span><span class=\"o\">.<\/span><span class=\"na\">SECONDS<\/span><span class=\"o\">,<\/span>\n    <span class=\"k\">new<\/span> <span class=\"nc\">LinkedBlockingQueue<\/span><span class=\"o\">&lt;&gt;(<\/span><span class=\"mi\">8<\/span><span class=\"o\">),<\/span>\n    <span class=\"k\">new<\/span> <span class=\"nf\">CustomizableThreadFactory<\/span><span class=\"o\">(<\/span><span class=\"s\">\"fileSorterTPE-\"<\/span><span class=\"o\">),<\/span>\n    <span class=\"k\">new<\/span> <span class=\"nc\">ThreadPoolExecutor<\/span><span class=\"o\">.<\/span><span class=\"na\">CallerRunsPolicy<\/span><span class=\"o\">());<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<h1 id=\"\u7ebf\u7a0b\u6c60\u6d88\u8d39\u62c6\u5206\u4efb\u52a1\">\u7ebf\u7a0b\u6c60\u6d88\u8d39\u62c6\u5206\u4efb\u52a1<\/h1>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Future<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Chunk<\/span><span class=\"o\">&gt;&gt;<\/span> <span class=\"n\">splitFutureList<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ArrayList<\/span><span class=\"o\">&lt;&gt;();<\/span>\n<span class=\"k\">while<\/span> <span class=\"o\">(<\/span><span class=\"kc\">true<\/span><span class=\"o\">){<\/span>\n    <span class=\"n\">line<\/span> <span class=\"o\">=<\/span> <span class=\"n\">br<\/span><span class=\"o\">.<\/span><span class=\"na\">readLine<\/span><span class=\"o\">();<\/span>\n    <span class=\"k\">if<\/span><span class=\"o\">(<\/span><span class=\"n\">line<\/span> <span class=\"o\">!=<\/span> <span class=\"kc\">null<\/span><span class=\"o\">){<\/span>\n        <span class=\"n\">chunkRows<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">line<\/span><span class=\"o\">);<\/span>\n    <span class=\"o\">}<\/span>\n    <span class=\"k\">if<\/span><span class=\"o\">(<\/span><span class=\"n\">line<\/span> <span class=\"o\">==<\/span> <span class=\"kc\">null<\/span> <span class=\"o\">||<\/span> <span class=\"n\">chunkRows<\/span><span class=\"o\">.<\/span><span class=\"na\">size<\/span><span class=\"o\">()<\/span> <span class=\"o\">&gt;=<\/span> <span class=\"n\">initialChunkSize<\/span><span class=\"o\">){<\/span>\n        <span class=\"k\">if<\/span><span class=\"o\">(<\/span><span class=\"n\">chunkRows<\/span><span class=\"o\">.<\/span><span class=\"na\">size<\/span><span class=\"o\">()<\/span> <span class=\"o\">&gt;<\/span> <span class=\"mi\">0<\/span><span class=\"o\">){<\/span>\n            <span class=\"kd\">final<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">rn<\/span> <span class=\"o\">=<\/span> <span class=\"n\">rowNum<\/span><span class=\"o\">;<\/span>\n            <span class=\"kd\">final<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">String<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">cr<\/span> <span class=\"o\">=<\/span> <span class=\"n\">chunkRows<\/span><span class=\"o\">;<\/span>\n            <span class=\"n\">rowNum<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">chunkRows<\/span><span class=\"o\">.<\/span><span class=\"na\">size<\/span><span class=\"o\">();<\/span>\n            <span class=\"n\">chunkRows<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ArrayList<\/span><span class=\"o\">&lt;&gt;();<\/span>\n            <span class=\"nc\">Future<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Chunk<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">chunk<\/span> <span class=\"o\">=<\/span> <span class=\"n\">threadPoolExecutor<\/span><span class=\"o\">.<\/span><span class=\"na\">submit<\/span><span class=\"o\">(()<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"o\">{<\/span>\n                <span class=\"n\">cr<\/span><span class=\"o\">.<\/span><span class=\"na\">sort<\/span><span class=\"o\">(<\/span><span class=\"n\">comparator<\/span><span class=\"o\">);<\/span>\n                <span class=\"k\">return<\/span> <span class=\"nf\">initialChunk<\/span><span class=\"o\">(<\/span><span class=\"n\">rn<\/span><span class=\"o\">,<\/span> <span class=\"n\">cr<\/span><span class=\"o\">,<\/span> <span class=\"n\">file<\/span><span class=\"o\">);<\/span>\n            <span class=\"o\">});<\/span>\n            <span class=\"n\">splitFutureList<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">chunk<\/span><span class=\"o\">);<\/span>\n        <span class=\"o\">}<\/span>\n    <span class=\"o\">}<\/span>\n    <span class=\"k\">if<\/span><span class=\"o\">(<\/span><span class=\"n\">line<\/span> <span class=\"o\">==<\/span> <span class=\"kc\">null<\/span><span class=\"o\">){<\/span>\n        <span class=\"k\">break<\/span><span class=\"o\">;<\/span>\n    <span class=\"o\">}<\/span>\n<span class=\"o\">}<\/span>\n<span class=\"n\">chunkList<\/span> <span class=\"o\">=<\/span> <span class=\"n\">splitFutureList<\/span><span class=\"o\">.<\/span><span class=\"na\">stream<\/span><span class=\"o\">().<\/span><span class=\"na\">map<\/span><span class=\"o\">(<\/span><span class=\"k\">this<\/span><span class=\"o\">::<\/span><span class=\"n\">get<\/span><span class=\"o\">).<\/span><span class=\"na\">collect<\/span><span class=\"o\">(<\/span><span class=\"nc\">Collectors<\/span><span class=\"o\">.<\/span><span class=\"na\">toList<\/span><span class=\"o\">());<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<h1 id=\"\u7ebf\u7a0b\u6c60\u6d88\u8d39\u5408\u5e76\u4efb\u52a1\">\u7ebf\u7a0b\u6c60\u6d88\u8d39\u5408\u5e76\u4efb\u52a1<\/h1>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"kt\">int<\/span> <span class=\"n\">currentLevel<\/span> <span class=\"o\">=<\/span> <span class=\"no\">INITIAL_CHUNK_LEVEL<\/span><span class=\"o\">;<\/span>\n<span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Future<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Chunk<\/span><span class=\"o\">&gt;&gt;<\/span> <span class=\"n\">mergeFutureList<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ArrayList<\/span><span class=\"o\">&lt;&gt;();<\/span>\n<span class=\"k\">while<\/span> <span class=\"o\">(<\/span><span class=\"kc\">true<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n    <span class=\"c1\">\/\/\u4ece\u961f\u5217\u4e2d\u83b7\u53d6\u4e00\u7ec4chunk<\/span>\n    <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Chunk<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">pollChunks<\/span> <span class=\"o\">=<\/span> <span class=\"n\">pollChunks<\/span><span class=\"o\">(<\/span><span class=\"n\">chunkQueue<\/span><span class=\"o\">,<\/span> <span class=\"n\">currentLevel<\/span><span class=\"o\">);<\/span>\n    <span class=\"c1\">\/\/\u672a\u53d6\u5230\u540c\u7ea7chunk, \u8868\u793a\u6b64\u7ea7\u522b\u5e94\u5408\u5e76\u5b8c\u6210<\/span>\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"nc\">CollectionUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">isEmpty<\/span><span class=\"o\">(<\/span><span class=\"n\">pollChunks<\/span><span class=\"o\">))<\/span> <span class=\"o\">{<\/span>\n        <span class=\"n\">mergeFutureList<\/span><span class=\"o\">.<\/span><span class=\"na\">stream<\/span><span class=\"o\">().<\/span><span class=\"na\">map<\/span><span class=\"o\">(<\/span><span class=\"k\">this<\/span><span class=\"o\">::<\/span><span class=\"n\">get<\/span><span class=\"o\">).<\/span><span class=\"na\">forEach<\/span><span class=\"o\">(<\/span><span class=\"nl\">chunkQueue:<\/span><span class=\"o\">:<\/span><span class=\"n\">add<\/span><span class=\"o\">);<\/span>\n        <span class=\"n\">mergeFutureList<\/span><span class=\"o\">.<\/span><span class=\"na\">clear<\/span><span class=\"o\">();<\/span>\n        <span class=\"c1\">\/\/chunkQueue \u4e2d\u53ea\u6709\u4e00\u4e2a\u5143\u7d20\uff0c\u8868\u793a\u6b64\u6b21\u5408\u5e76\u662f\u6700\u7ec8\u5408\u5e76<\/span>\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">chunkQueue<\/span><span class=\"o\">.<\/span><span class=\"na\">size<\/span><span class=\"o\">()<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">1<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n            <span class=\"k\">break<\/span><span class=\"o\">;<\/span>\n        <span class=\"o\">}<\/span> <span class=\"k\">else<\/span> <span class=\"o\">{<\/span>\n            <span class=\"n\">currentLevel<\/span><span class=\"o\">++;<\/span>\n            <span class=\"k\">continue<\/span><span class=\"o\">;<\/span>\n        <span class=\"o\">}<\/span>\n    <span class=\"o\">}<\/span>\n    <span class=\"nc\">Future<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Chunk<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">chunk<\/span> <span class=\"o\">=<\/span> <span class=\"n\">threadPoolExecutor<\/span><span class=\"o\">.<\/span><span class=\"na\">submit<\/span><span class=\"o\">(()<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"n\">merge<\/span><span class=\"o\">(<\/span><span class=\"n\">pollChunks<\/span><span class=\"o\">,<\/span> <span class=\"n\">original<\/span><span class=\"o\">));<\/span>\n    <span class=\"n\">mergeFutureList<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">chunk<\/span><span class=\"o\">);<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u53ef\u4ee5\u770b\u5230\u5408\u5e76\u4efb\u52a1\u4e0e\u62c6\u5206\u4efb\u52a1\u6709\u4e9b\u4e0d\u540c\uff0c\u62c6\u5206\u4efb\u52a1\u662f\u5728\u5faa\u73af\u9000\u51fa\u540e\u624d\u6267\u884c<code class=\"language-plaintext highlighter-rouge\">Future.get<\/code>\uff0c\u56e0\u4e3a\u62c6\u5206\u4e0d\u7528\u8003\u8651\u5148\u540e\uff1b\n\u800c\u5408\u5e76\u4efb\u52a1\u5728\u6bcf\u6b21\u83b7\u53d6\u5f53\u524d\u9636\u6bb5\u7684chunk\u7ed3\u675f\u65f6\u6267\u884c<code class=\"language-plaintext highlighter-rouge\">Future.get<\/code>\uff0c\u8fd9\u6837\u624d\u80fd\u907f\u514d\u4e0d\u540c\u7684\u9636\u6bb5\u4e4b\u95f4\u4ea7\u751f\u6df7\u4e71\u3002<\/p>\n\n<p><a href=\"https:\/\/github.com\/bit-ranger\/architecture\/blob\/d9083d2fb71763557e6d4eb6875f9c001fd41596\/core\/src\/main\/java\/com\/rainyalley\/architecture\/core\/arithmetic\/sort\/FileSorter.java\">\u5b8c\u6574\u4ee3\u7801<\/a><\/p>\n\n<h1 id=\"\u6d4b\u8bd5\">\u6d4b\u8bd5<\/h1>\n\n<p>\u5728\u4e0a\u4e00\u7bc7\u4e2d\uff0c\u4f7f\u7528\u5355\u7ebf\u7a0b\uff0c1\u5343\u4e07\u6761\u6570\u636e\u6392\u5e8f\u8017\u65f613\u79d2\uff1b\n\u5728\u540c\u4e00\u53f0\u7535\u8111\u4e0a\uff0c\u4f7f\u7528\u591a\u7ebf\u7a0b\u540e\uff0c\u8017\u65f66\u79d2\uff0c\u65f6\u95f4\u51cf\u5c11\u4e86\u4e00\u534a\u3002<\/p>\n\n<p>\u5728\u62c6\u5206\u8fc7\u7a0b\u4e2d\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u8981\u5728\u5185\u5b58\u4e2d\u8fdb\u884c\u6392\u5e8f\uff0c\n\u5728\u62c6\u5206\u548c\u5408\u5e76\u8fc7\u7a0b\u4e2d\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u8981\u6301\u6709\u81ea\u5df1\u7684\u8bfb\u5199\u7f13\u51b2\u533a\uff0c\u8fd9\u65e0\u7591\u4f1a\u589e\u5927\u5185\u5b58\u7684\u4f7f\u7528\u91cf\u3002<\/p>\n\n<p>\u7a76\u7adf\u6d88\u8017\u4e86\u591a\u5c11\u5185\u5b58\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">Java Mission Control<\/code>\u6765\u89c2\u5bdf\uff0cjdk8\u7684bin\u76ee\u5f55\u4e0b<code class=\"language-plaintext highlighter-rouge\">jmc.exe<\/code>\u5373\u4e3a\u6b64\u5de5\u5177\u3002<\/p>\n","pubDate":"Thu, 28 May 2015 00:00:00 +0000","link":"https:\/\/bit-ranger.github.io\/blog\/algorithm\/large-file-diff-concurrent\/","guid":"https:\/\/bit-ranger.github.io\/blog\/algorithm\/large-file-diff-concurrent\/","category":["java","\u7b97\u6cd5","algorithm","\u6392\u5e8f","concurrent","algorithm"]},{"title":"\u5927\u6587\u4ef6\u5185\u5bb9\u5bf9\u6bd4","description":"<ul id=\"markdown-toc\">\n  <li><a href=\"#\u5927\u6587\u4ef6\u5185\u5bb9\u6392\u5e8f\" id=\"markdown-toc-\u5927\u6587\u4ef6\u5185\u5bb9\u6392\u5e8f\">\u5927\u6587\u4ef6\u5185\u5bb9\u6392\u5e8f<\/a><\/li>\n  <li><a href=\"#\u6d4b\u8bd5\" id=\"markdown-toc-\u6d4b\u8bd5\">\u6d4b\u8bd5<\/a><\/li>\n<\/ul>\n\n<p>\u6700\u8fd1\u63a5\u5230\u4e00\u4e2a\u9700\u6c42\uff0c\u8981\u5bf9\u4e24\u4e2a\u7cfb\u7edf\u7684\u8ba2\u5355\u8fdb\u884c\u5bf9\u6bd4\uff0c\u627e\u51fa\u5176\u4e2d\u7684\u5dee\u5f02\uff0c\u5bf9\u6bd4\u7ed3\u679c\u67094\u79cd\uff1a\u4e00\u81f4\u3001\u4e0d\u4e00\u81f4\u3001\u4e22\u5931\u3001\u591a\u4f59\u3002<\/p>\n\n<p>\u5982\u679c\u6570\u636e\u91cf\u5c11\uff0c\u5904\u7406\u8d77\u6765\u5c31\u5f88\u7b80\u5355\uff0c\u4f8b\u5982\u8981\u5bf9A,B\u4e24\u4efd\u6570\u636e\u8fdb\u884c\u5bf9\u6bd4\uff1a<\/p>\n<ol>\n  <li>\u5c06\u6570\u636eA\u653e\u5165\u54c8\u5e0c\u8868<\/li>\n  <li>\u904d\u5386\u6570\u636eB\uff0c\u4f9d\u636eid\u4eceA\u4e2d\u67e5\u627e\u5bf9\u5e94\u7684\u8ba2\u5355<\/li>\n  <li>\u82e5\u4eceA\u4e2d\u627e\u5230\u4e86\u5bf9\u5e94\u7684\u8ba2\u5355\uff0c\u5219\u6bd4\u8f83\u662f\u5426\u4e00\u81f4\uff0c\u5e76\u5c06\u6b64\u8ba2\u5355\u6807\u8bb0\u4e3a\u5df2\u5339\u914d<\/li>\n  <li>\u82e5\u4eceA\u4e2d\u627e\u4e0d\u5230\u5bf9\u5e94\u7684\u8ba2\u5355\uff0c\u5219\u8868\u793aA\u4e22\u5931\u6b64\u8ba2\u5355<\/li>\n  <li>\u904d\u5386A\uff0c\u7b5b\u9009\u51fa\u6240\u6709\u672a\u5339\u914d\u7684\u8ba2\u5355\uff0c\u8fd9\u4e9b\u8ba2\u5355\u90fd\u662fA\u4e2d\u591a\u4f59\u7684<\/li>\n<\/ol>\n\n<p>\u4f46\u662f\u5982\u679c\u6570\u636e\u91cf\u8d85\u5927\uff0c\u5728\u5185\u5b58\u4e2d\u5904\u7406\u5c31\u4e0d\u5408\u9002\u4e86\uff0c\u6570\u636e\u9700\u8981\u653e\u5728\u78c1\u76d8\u4e0a\u3002\n\u57fa\u4e8e\u54c8\u5e0c\u7684\u5bf9\u6bd4\u7b97\u6cd5\uff0c\u65e0\u6cd5\u907f\u514d\u5927\u91cf\u5bf9\u78c1\u76d8\u7684\u968f\u673a\u8bbf\u95ee\uff0c\u56e0\u800c\u65e0\u6cd5\u4f7f\u7528buffer\uff0c\u5b8c\u5168\u7684io\u8bfb\u5199\u6027\u80fd\u592a\u5dee\uff0c\u6240\u4ee5\u8fd9\u4e2a\u65b9\u6848\u662f\u4e0d\u884c\u7684\u3002<\/p>\n\n<p>\u5982\u679cAB\u4e24\u4e2a\u96c6\u5408\u662f\u6709\u5e8f\u7684\uff0c\u90a3\u4e48\u5bf9\u6bd4\u5c06\u4f1a\u53d8\u5f97\u5bb9\u6613\uff0c\u4e00\u6b21\u904d\u5386\u5c31\u53ef\u4ee5\u5bf9\u6bd4\u5b8c\u6210\uff0c\u4f8b\u5982\u4ee5id\u6392\u5e8f<\/p>\n<ol>\n  <li>\u8bfb\u53d6A\u6307\u9488\u5bf9\u5e94\u7684\u8ba2\u5355\uff0c\u8bfb\u53d6B\u6307\u9488\u5bf9\u5e94\u7684\u8ba2\u5355<\/li>\n  <li>\u82e5\u4e24\u4e2a\u8ba2\u5355id\u76f8\u7b49\uff0c\u5219\u5bf9\u6bd4\u5185\u5bb9\u662f\u5426\u4e00\u81f4<\/li>\n  <li>\u82e5A\u6307\u9488\u8ba2\u5355id&gt;B\u6307\u9488\u8ba2\u5355id\uff0c\u4ee3\u8868A\u4e2d\u7f3a\u5c11B\u6307\u9488\u8ba2\u5355\uff0c\u8bb0\u5f55\u7ed3\u679c\uff0cB\u6307\u9488\u79fb\u52a8\u5230\u540e\u4e00\u4e2a<\/li>\n  <li>\u82e5A\u6307\u9488\u8ba2\u5355id&lt;B\u6307\u9488\u8ba2\u5355id\uff0c\u4ee3\u8868A\u4e2d\u591a\u4f59\u4e86\u6307\u9488\u8ba2\u5355\uff0c\u8bb0\u5f55\u7ed3\u679c\uff0cA\u6307\u9488\u79fb\u52a8\u5230\u540e\u4e00\u4e2a<\/li>\n<\/ol>\n\n<p>\u6240\u4ee5\uff0c\u8fd9\u4e2a\u95ee\u9898\u53ef\u4ee5\u62c6\u5206\u4e3a\uff1a\u5bf9A\u3001B\u6587\u4ef6\u5185\u5bb9\u8fdb\u884c\u6392\u5e8f\uff0c\u53cc\u6307\u9488\u904d\u5386 A\u3001B\u3002<\/p>\n\n<h1 id=\"\u5927\u6587\u4ef6\u5185\u5bb9\u6392\u5e8f\">\u5927\u6587\u4ef6\u5185\u5bb9\u6392\u5e8f<\/h1>\n\n<p>\u5bf9\u5927\u6587\u4ef6\u7684\u5185\u5bb9\u8fdb\u884c\u6392\u5e8f\uff0c\u53ef\u4ee5\u4f7f\u7528\u62c6\u5206-&gt;\u6392\u5e8f-&gt;\u5408\u5e76\u7684\u601d\u8def<\/p>\n<ol>\n  <li>\u6309\u884c\u8bfb\u53d6\u6587\u4ef6\uff0c\u5c06\u8bfb\u5230\u7684\u884c\u653e\u5165list<\/li>\n  <li>\u5982\u679c\u5df2\u8bfb\u53d6\u7684\u884c\u8fbe\u5230\u4e861\u4e07\u884c\uff0c\u5bf9list\u8fdb\u884c\u6392\u5e8f\uff0c\u5c06\u6392\u5e8f\u540e\u7684list\u9010\u884c\u5199\u5165\u4e34\u65f6\u6587\u4ef6<\/li>\n  <li>\u6253\u5f00\u591a\u4e2a\u4e34\u65f6\u6587\u4ef6\uff0c\u4ece\u6bcf\u4e2a\u6587\u4ef6\u7684\u4e2d\u9010\u884c\u8bfb\u53d6\uff0c\u9009\u53d6\u5176\u4e2d\u8ba2\u5355id\u6700\u5c0f\u7684\u884c\uff0c\u5199\u5165\u65b0\u7684\u4e34\u65f6\u6587\u4ef6<\/li>\n  <li>\u5faa\u73af\u4ee5\u4e0a\u6b65\u9aa4\uff0c\u76f4\u81f3\u5269\u4e0b\u4e00\u4e2a\u6587\u4ef6<\/li>\n<\/ol>\n\n<p>\u793a\u4f8b\u4ee3\u7801<\/p>\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code> <span class=\"k\">while<\/span> <span class=\"o\">(<\/span><span class=\"kc\">true<\/span><span class=\"o\">){<\/span>\n     <span class=\"n\">line<\/span> <span class=\"o\">=<\/span> <span class=\"n\">br<\/span><span class=\"o\">.<\/span><span class=\"na\">readLine<\/span><span class=\"o\">();<\/span>\n     <span class=\"k\">if<\/span><span class=\"o\">(<\/span><span class=\"n\">line<\/span> <span class=\"o\">!=<\/span> <span class=\"kc\">null<\/span><span class=\"o\">){<\/span>\n         <span class=\"n\">chunkRows<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">line<\/span><span class=\"o\">);<\/span>\n     <span class=\"o\">}<\/span>\n     <span class=\"k\">if<\/span><span class=\"o\">(<\/span><span class=\"n\">line<\/span> <span class=\"o\">==<\/span> <span class=\"kc\">null<\/span> <span class=\"o\">||<\/span> <span class=\"n\">chunkRows<\/span><span class=\"o\">.<\/span><span class=\"na\">size<\/span><span class=\"o\">()<\/span> <span class=\"o\">&gt;=<\/span> <span class=\"n\">initialChunkSize<\/span><span class=\"o\">){<\/span>\n         <span class=\"k\">if<\/span><span class=\"o\">(<\/span><span class=\"n\">chunkRows<\/span><span class=\"o\">.<\/span><span class=\"na\">size<\/span><span class=\"o\">()<\/span> <span class=\"o\">&gt;<\/span> <span class=\"mi\">0<\/span><span class=\"o\">){<\/span>\n             <span class=\"n\">chunkRows<\/span><span class=\"o\">.<\/span><span class=\"na\">sort<\/span><span class=\"o\">(<\/span><span class=\"n\">comparator<\/span><span class=\"o\">);<\/span>\n             <span class=\"nc\">Chunk<\/span> <span class=\"n\">chunk<\/span> <span class=\"o\">=<\/span> <span class=\"n\">initialChunk<\/span><span class=\"o\">(<\/span><span class=\"n\">rowNum<\/span><span class=\"o\">,<\/span> <span class=\"n\">chunkRows<\/span><span class=\"o\">,<\/span> <span class=\"n\">file<\/span><span class=\"o\">);<\/span>\n             <span class=\"n\">chunkList<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">chunk<\/span><span class=\"o\">);<\/span>\n             <span class=\"n\">rowNum<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">chunkRows<\/span><span class=\"o\">.<\/span><span class=\"na\">size<\/span><span class=\"o\">();<\/span>\n             <span class=\"n\">chunkRows<\/span><span class=\"o\">.<\/span><span class=\"na\">clear<\/span><span class=\"o\">();<\/span>\n         <span class=\"o\">}<\/span>\n     <span class=\"o\">}<\/span>\n     <span class=\"k\">if<\/span><span class=\"o\">(<\/span><span class=\"n\">line<\/span> <span class=\"o\">==<\/span> <span class=\"kc\">null<\/span><span class=\"o\">){<\/span>\n         <span class=\"k\">break<\/span><span class=\"o\">;<\/span>\n     <span class=\"o\">}<\/span>\n <span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code> <span class=\"k\">while<\/span> <span class=\"o\">(<\/span><span class=\"kc\">true<\/span><span class=\"o\">){<\/span>\n     <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Chunk<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">pollChunks<\/span> <span class=\"o\">=<\/span>  <span class=\"n\">pollChunks<\/span><span class=\"o\">(<\/span><span class=\"n\">chunkQueue<\/span><span class=\"o\">,<\/span> <span class=\"n\">currentLevel<\/span><span class=\"o\">);<\/span>\n     <span class=\"k\">if<\/span><span class=\"o\">(<\/span><span class=\"nc\">CollectionUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">isEmpty<\/span><span class=\"o\">(<\/span><span class=\"n\">pollChunks<\/span><span class=\"o\">)){<\/span>\n         <span class=\"n\">currentLevel<\/span><span class=\"o\">++;<\/span>\n         <span class=\"k\">continue<\/span><span class=\"o\">;<\/span>\n     <span class=\"o\">}<\/span>\n     <span class=\"c1\">\/\/\u5408\u5e76<\/span>\n     <span class=\"nc\">Chunk<\/span> <span class=\"n\">mergedChunk<\/span> <span class=\"o\">=<\/span> <span class=\"n\">merge<\/span><span class=\"o\">(<\/span><span class=\"n\">pollChunks<\/span><span class=\"o\">,<\/span> <span class=\"n\">original<\/span><span class=\"o\">);<\/span>\n     <span class=\"c1\">\/\/chunkQueue \u4e2d\u6ca1\u6709\u540e\u7eed\u7684\u5143\u7d20\uff0c\u8868\u793a\u6b64\u6b21\u5408\u5e76\u662f\u6700\u7ec8\u5408\u5e76<\/span>\n     <span class=\"k\">if<\/span><span class=\"o\">(<\/span><span class=\"n\">chunkQueue<\/span><span class=\"o\">.<\/span><span class=\"na\">size<\/span><span class=\"o\">()<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span><span class=\"o\">){<\/span>\n         <span class=\"n\">chunkQueue<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">mergedChunk<\/span><span class=\"o\">);<\/span>\n         <span class=\"k\">break<\/span><span class=\"o\">;<\/span>\n     <span class=\"o\">}<\/span> <span class=\"k\">else<\/span> <span class=\"o\">{<\/span>\n         <span class=\"n\">chunkQueue<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">mergedChunk<\/span><span class=\"o\">);<\/span>\n     <span class=\"o\">}<\/span>\n <span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p><a href=\"\u5b8c\u6574\u4ee3\u7801\">\u5b8c\u6574\u4ee3\u7801<\/a><\/p>\n\n<h1 id=\"\u6d4b\u8bd5\">\u6d4b\u8bd5<\/h1>\n\n<p>\u5728\u6700\u540e\u7684\u591a\u8def\u5408\u5e76\u4e2d\u8981\u8003\u8651\u4f7f\u7528\u591a\u5c11\u8def\u8fdb\u884c\u5408\u5e76\uff0c\u66f4\u5c11\u7684\u8def\u6570\uff0c\u5c06\u4ea7\u751f\u66f4\u591a\u7684\u4e34\u65f6\u6587\u4ef6<\/p>\n\n<p>\u62c6\u5206\u65f6\u9700\u8981\u8003\u8651\u6bcf\u4e2a\u5757\u7684\u5927\u5c0f\uff0c\u8fc7\u5927\u7684\u5757\u5c06\u9020\u6210\u9891\u7e41\u7684FULL GC<\/p>\n\n<p>IO\u7684\u7f13\u51b2\u5bb9\u91cf\u533a\u4e5f\u8981\u8003\u8651\uff0c\u8fd9\u5c06\u5f71\u54cdIO\u8bfb\u5199\u7684\u901f\u5ea6\uff0c\u4ee5\u53caFULL GC\u7684\u9891\u7387<\/p>\n\n<p>\u4ee5\u5982\u4e0b\u914d\u7f6e\u4e3a\u4f8b\uff0c\u5728\u6211\u7684\u4e2a\u4eba\u7535\u8111\u4e0a\uff0c \ncpu\u9891\u73873.40GHZ\uff0c\u78c1\u76d8\u987a\u5e8f\u8bfb450MB\/s\uff0c\u968f\u673a\u8bfb190MB\/s\uff0c\u987a\u5e8f\u5199250MB\/s\uff0c\u6570\u636e\u5bbd\u5ea620\u4e3a20\u5b57\u7b26\n\u5bf91\u5343\u4e07\u6761\u6570\u636e\u8fdb\u884c\u6392\u5e8f\uff0c\u8017\u65f613\u79d2\u3002<\/p>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"nc\">FileSorter<\/span> <span class=\"n\">sorter<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">FileSorter<\/span><span class=\"o\">((<\/span><span class=\"n\">p<\/span><span class=\"o\">,<\/span><span class=\"n\">n<\/span><span class=\"o\">)<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"n\">p<\/span><span class=\"o\">.<\/span><span class=\"na\">compareTo<\/span><span class=\"o\">(<\/span><span class=\"n\">n<\/span><span class=\"o\">),<\/span>\n    <span class=\"mi\">8<\/span><span class=\"o\">,<\/span> <span class=\"mi\">50000<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1024<\/span><span class=\"o\">*<\/span><span class=\"mi\">1024<\/span><span class=\"o\">*<\/span><span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">File<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\/var\/tmp\/fileSorter\"<\/span><span class=\"o\">),<\/span> <span class=\"kc\">false<\/span><span class=\"o\">);<\/span>\n<span class=\"kt\">long<\/span> <span class=\"n\">start<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">currentTimeMillis<\/span><span class=\"o\">();<\/span>\n<span class=\"n\">sorter<\/span><span class=\"o\">.<\/span><span class=\"na\">sort<\/span><span class=\"o\">(<\/span><span class=\"n\">file<\/span><span class=\"o\">,<\/span> <span class=\"n\">dest<\/span><span class=\"o\">);<\/span>\n<span class=\"kt\">long<\/span> <span class=\"n\">end<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">currentTimeMillis<\/span><span class=\"o\">();<\/span>\n<span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">end<\/span> <span class=\"o\">-<\/span> <span class=\"n\">start<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u8be5\u6392\u5e8f\u7b97\u6cd5\u65e2\u6709CPU\u8ba1\u7b97\u53c8\u6709IO\uff0cCPU\u8ba1\u7b97\u65f6IO\u7a7a\u95f2\uff0cIO\u65f6CPU\u7a7a\u95f4\uff0c\u5982\u679c\u628a\u8be5\u65b9\u6cd5\u6539\u5199\u6210\u591a\u7ebf\u7a0b\u7248\u672c\uff0c\u7406\u8bba\u4e0a\u53ef\u4ee5\u63d0\u5347\u4e0d\u5c11\u901f\u5ea6\u3002<\/p>\n","pubDate":"Thu, 26 Mar 2015 00:00:00 +0000","link":"https:\/\/bit-ranger.github.io\/blog\/algorithm\/large-file-diff\/","guid":"https:\/\/bit-ranger.github.io\/blog\/algorithm\/large-file-diff\/","category":["java","\u7b97\u6cd5","algorithm","\u6392\u5e8f","algorithm"]},{"title":"\u5927\u5bf9\u8c61\u5f15\u8d77\u7684\u9891\u7e41FULL GC","description":"<p>\u6700\u8fd1\u53d1\u73b0\u4e86\u9891\u7e41FULL GC\u7684\u60c5\u51b5\uff0c\u67e5\u770bGC\u65e5\u5fd7\u540e\uff0c\u53d1\u73b0\u6bcf\u6b21FULL GC\u540e\uff0c\u8001\u5e74\u4ee3\u90fd\u80fd\u56de\u6536\u5927\u534a\u4ee5\u4e0a\u7684\u7a7a\u95f4\uff0c\u8fd9\u610f\u5473\u7740\u6709\u5f88\u591a\u4e34\u65f6\u5bf9\u8c61\u88ab\u5206\u914d\u5230\u4e86\u8001\u5e74\u4ee3\u3002<\/p>\n\n<p>\u7528<code class=\"language-plaintext highlighter-rouge\">jmap<\/code>\u547d\u4ee4\u5bfc\u51fa\u5806\u8f6c\u50a8\u6587\u4ef6\uff0c\u7136\u540e\u7528jvisualvm\u5bfc\u5165\u540e\u8fdb\u884c\u5206\u6790\uff0c\u53d1\u73b0char[]\u5360\u636e\u4e86\u6700\u591a\u4e86\u5185\u5b58\u3002<\/p>\n\n<p>\u5176\u4e2d\u6709\u5927\u91cf\u7684\u5bf9\u8c61\u8fbe\u5230\u4e863M\uff0c\u88ab\u76f4\u63a5\u62c5\u4fdd\u5206\u914d\u8fdb\u4e86\u8001\u5e74\u4ee3\uff0c\u56e0\u4e3a\u6682\u65f6\u4e0d\u77e5\u9053\u8fd9\u4e9b\u5bf9\u8c61\u662f\u600e\u4e48\u4ea7\u751f\u7684\uff0c\u6700\u5feb\u7684\u89e3\u51b3\u529e\u6cd5\u5c31\u662f\u589e\u5927\u62c5\u4fdd\u5206\u914d\u7684\u9608\u503c\u3002<\/p>\n\n<p>\u4e0b\u9762\u5c31\u662f\u6d4b\u8bd5\u8fc7\u7a0b<\/p>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"cm\">\/**\n -server\n -XX:+UseConcMarkSweepGC\n -Xms20M\n -Xmx20M\n -Xmn10M\n -XX:SurvivorRatio=8\n -XX:PretenureSizeThreshold=2000000\n -XX:+PrintGC\n -XX:+PrintGCDetails\n -XX:+PrintGCDateStamps\n -XX:+PrintHeapAtGC\n -Xloggc:\/var\/logs\/PretenureSizeThreshold.log\n -XX:+HeapDumpOnOutOfMemoryError\n -XX:HeapDumpPath=\/var\/dumps\/PretenureSizeThreshold.hprof\n *\/<\/span>\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">PretenureSizeThreshold<\/span> <span class=\"o\">{<\/span>\n\n    <span class=\"kd\">private<\/span> <span class=\"kd\">static<\/span> <span class=\"kd\">final<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">_1MB<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1000<\/span> <span class=\"o\">*<\/span> <span class=\"mi\">1000<\/span><span class=\"o\">;<\/span>\n\n    <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">Exception<\/span><span class=\"o\">{<\/span>\n        <span class=\"nc\">RuntimeMXBean<\/span> <span class=\"n\">mxBean<\/span> <span class=\"o\">=<\/span>  <span class=\"nc\">ManagementFactory<\/span><span class=\"o\">.<\/span><span class=\"na\">getRuntimeMXBean<\/span><span class=\"o\">();<\/span>\n        <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">mxBean<\/span><span class=\"o\">.<\/span><span class=\"na\">getName<\/span><span class=\"o\">());<\/span>\n        <span class=\"nc\">String<\/span> <span class=\"n\">pid<\/span> <span class=\"o\">=<\/span> <span class=\"n\">mxBean<\/span><span class=\"o\">.<\/span><span class=\"na\">getName<\/span><span class=\"o\">().<\/span><span class=\"na\">split<\/span><span class=\"o\">(<\/span><span class=\"s\">\"@\"<\/span><span class=\"o\">)[<\/span><span class=\"mi\">0<\/span><span class=\"o\">];<\/span>\n\n        <span class=\"kt\">byte<\/span><span class=\"o\">[]<\/span> <span class=\"n\">allocation<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"kt\">byte<\/span><span class=\"o\">[<\/span><span class=\"mi\">3<\/span><span class=\"o\">*<\/span><span class=\"n\">_1MB<\/span><span class=\"o\">];<\/span>\n\n        <span class=\"k\">while<\/span> <span class=\"o\">(<\/span><span class=\"kc\">true<\/span><span class=\"o\">){<\/span>\n            <span class=\"nc\">Thread<\/span><span class=\"o\">.<\/span><span class=\"na\">sleep<\/span><span class=\"o\">(<\/span><span class=\"mi\">1000<\/span><span class=\"o\">);<\/span>\n        <span class=\"o\">}<\/span>\n\n    <span class=\"o\">}<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<div class=\"language-text highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code>D:\\Doc\\MyRepo\\learning-java&gt;jmap -heap 14000\nAttaching to process ID 14000, please wait...\nDebugger attached successfully.\nServer compiler detected.\nJVM version is 25.121-b13\n\nusing parallel threads in the new generation.\nusing thread-local object allocation.\nConcurrent Mark-Sweep GC\n\nHeap Configuration:\n   MinHeapFreeRatio         = 40\n   MaxHeapFreeRatio         = 70\n   MaxHeapSize              = 20971520 (20.0MB)\n   NewSize                  = 10485760 (10.0MB)\n   MaxNewSize               = 10485760 (10.0MB)\n   OldSize                  = 10485760 (10.0MB)\n   NewRatio                 = 2\n   SurvivorRatio            = 8\n   MetaspaceSize            = 21807104 (20.796875MB)\n   CompressedClassSpaceSize = 1073741824 (1024.0MB)\n   MaxMetaspaceSize         = 17592186044415 MB\n   G1HeapRegionSize         = 0 (0.0MB)\n\nHeap Usage:\nNew Generation (Eden + 1 Survivor Space):\n   capacity = 9437184 (9.0MB)\n   used     = 2748888 (2.6215438842773438MB)\n   free     = 6688296 (6.378456115722656MB)\n   29.128265380859375% used\nEden Space:\n   capacity = 8388608 (8.0MB)\n   used     = 2748888 (2.6215438842773438MB)\n   free     = 5639720 (5.378456115722656MB)\n   32.7692985534668% used\nFrom Space:\n   capacity = 1048576 (1.0MB)\n   used     = 0 (0.0MB)\n   free     = 1048576 (1.0MB)\n   0.0% used\nTo Space:\n   capacity = 1048576 (1.0MB)\n   used     = 0 (0.0MB)\n   free     = 1048576 (1.0MB)\n   0.0% used\nconcurrent mark-sweep generation:\n   capacity = 10485760 (10.0MB)\n   used     = 3000016 (2.8610382080078125MB)\n   free     = 7485744 (7.1389617919921875MB)\n   28.610382080078125% used\n\n1815 interned Strings occupying 162040 bytes.\n<\/code><\/pre><\/div><\/div>\n<p>\u8001\u5e74\u4ee3\u5360\u7528\u7684\u7a7a\u95f4\u4e3a3000016\uff0c\u8fd9\u8868\u793a\u6570\u7ec4\u901a\u8fc7\u62c5\u4fdd\u5206\u914d\u8fdb\u5165\u4e86\u8001\u5e74\u4ee3\uff0c\u591a\u51fa\u6765\u768416\u662f\u5bf9\u8c61\u5934\u7684\u4f53\u79ef<\/p>\n\n<p>\u4fee\u6539\u542f\u52a8\u53c2\u6570<code class=\"language-plaintext highlighter-rouge\">-XX:PretenureSizeThreshold=4000000<\/code><\/p>\n\n<div class=\"language-text highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code>D:\\Doc\\MyRepo\\learning-java&gt;jmap -heap 2356\nAttaching to process ID 2356, please wait...\nDebugger attached successfully.\nServer compiler detected.\nJVM version is 25.121-b13\n\nusing parallel threads in the new generation.\nusing thread-local object allocation.\nConcurrent Mark-Sweep GC\n\nHeap Configuration:\n   MinHeapFreeRatio         = 40\n   MaxHeapFreeRatio         = 70\n   MaxHeapSize              = 20971520 (20.0MB)\n   NewSize                  = 10485760 (10.0MB)\n   MaxNewSize               = 10485760 (10.0MB)\n   OldSize                  = 10485760 (10.0MB)\n   NewRatio                 = 2\n   SurvivorRatio            = 8\n   MetaspaceSize            = 21807104 (20.796875MB)\n   CompressedClassSpaceSize = 1073741824 (1024.0MB)\n   MaxMetaspaceSize         = 17592186044415 MB\n   G1HeapRegionSize         = 0 (0.0MB)\n\nHeap Usage:\nNew Generation (Eden + 1 Survivor Space):\n   capacity = 9437184 (9.0MB)\n   used     = 5748624 (5.4823150634765625MB)\n   free     = 3688560 (3.5176849365234375MB)\n   60.91461181640625% used\nEden Space:\n   capacity = 8388608 (8.0MB)\n   used     = 5748624 (5.4823150634765625MB)\n   free     = 2639984 (2.5176849365234375MB)\n   68.52893829345703% used\nFrom Space:\n   capacity = 1048576 (1.0MB)\n   used     = 0 (0.0MB)\n   free     = 1048576 (1.0MB)\n   0.0% used\nTo Space:\n   capacity = 1048576 (1.0MB)\n   used     = 0 (0.0MB)\n   free     = 1048576 (1.0MB)\n   0.0% used\nconcurrent mark-sweep generation:\n   capacity = 10485760 (10.0MB)\n   used     = 0 (0.0MB)\n   free     = 10485760 (10.0MB)\n   0.0% used\n\n1815 interned Strings occupying 162040 bytes.\n\n<\/code><\/pre><\/div><\/div>\n<p>\u6b64\u65f6\uff0c\u8001\u5e74\u4ee3\u5360\u75280\uff0c\u8fd9\u8868\u793a\u6570\u7ec4\u6ca1\u6709\u8fbe\u5230\u5927\u5bf9\u8c61\u7684\u6807\u51c6\uff0c\u76f4\u63a5\u5206\u914d\u5728\u4e86\u65b0\u751f\u4ee3<\/p>\n","pubDate":"Sun, 15 Mar 2015 00:00:00 +0000","link":"https:\/\/bit-ranger.github.io\/blog\/java\/FullGc\/","guid":"https:\/\/bit-ranger.github.io\/blog\/java\/FullGc\/","category":["java","jvm","java"]},{"title":"spring security \u63a2\u79d8","description":"<h1 id=\"\u6982\u8ff0\">\u6982\u8ff0<\/h1>\n\n<p><a href=\"http:\/\/projects.spring.io\/spring-security\">Spring Security<\/a>\u8fd9\u662f\u4e00\u79cd\u57fa\u4e8eSpring AOP\u548cServlet\u8fc7\u6ee4\u5668\u7684\u5b89\u5168\u6846\u67b6\u3002\u5b83\u63d0\u4f9b\u5168\u9762\u7684\u5b89\u5168\u6027\u89e3\u51b3\u65b9\u6848\uff0c\u540c\u65f6\u5728Web\u8bf7\u6c42\u7ea7\u548c\u65b9\u6cd5\u8c03\u7528\u7ea7\u5904\u7406\u8eab\u4efd\u786e\u8ba4\u548c\u6388\u6743\u3002\u5728Spring Framework\u57fa\u7840\u4e0a\uff0cSpring Security\u5145\u5206\u5229\u7528\u4e86\u4f9d\u8d56\u6ce8\u5165\uff08DI\uff0cDependency Injection\uff09\u548c\u9762\u5411\u5207\u9762\u6280\u672f\u3002<\/p>\n\n<ul id=\"markdown-toc\">\n  <li><a href=\"#\u6982\u8ff0\" id=\"markdown-toc-\u6982\u8ff0\">\u6982\u8ff0<\/a><\/li>\n  <li><a href=\"#filter\" id=\"markdown-toc-filter\">Filter<\/a><\/li>\n  <li><a href=\"#http\" id=\"markdown-toc-http\">HTTP<\/a><\/li>\n  <li><a href=\"#filterchain\" id=\"markdown-toc-filterchain\">FilterChain<\/a><\/li>\n  <li><a href=\"#filtersecurityinterceptor\" id=\"markdown-toc-filtersecurityinterceptor\">FilterSecurityInterceptor<\/a><\/li>\n  <li><a href=\"#authenticationmanager\" id=\"markdown-toc-authenticationmanager\">AuthenticationManager<\/a><\/li>\n  <li><a href=\"#accessdecisionmanager\" id=\"markdown-toc-accessdecisionmanager\">AccessDecisionManager<\/a><\/li>\n  <li><a href=\"#securitymetadatasource\" id=\"markdown-toc-securitymetadatasource\">SecurityMetadataSource<\/a><\/li>\n<\/ul>\n\n<p>\u672c\u6587\u7684\u5b97\u65e8\u5e76\u975e\u63cf\u8ff0\u5982\u4f55\u4ece\u96f6\u5f00\u59cb\u642d\u5efa\u4e00\u4e2a \u201chello world\u201d \u7ea7\u7684demo\uff0c\u6216\u8005\u5217\u4e3e\u6709\u54ea\u4e9b\u53ef\u914d\u7f6e\u9879\uff08\u8fd9\u79cd\u7c7b\u4f3c\u4e8e\u8bcd\u5178\u7684\u6587\u6863\uff0c\u6ca1\u6709\u6bd4<a href=\"http:\/\/docs.spring.io\/spring-security\/site\/docs\/4.0.1.RELEASE\/reference\/htmlsingle\/\">\u53c2\u8003\u4e66<\/a>\u66f4\u5408\u9002\u7684\u4e86\uff09\uff0c\u800c\u662f\u7b80\u5355\u63cf\u8ff0spring-security\u9879\u76ee\u7684\u6574\u4f53\u7ed3\u6784\uff0c\u8bbe\u8ba1\u601d\u60f3\uff0c\u4ee5\u53ca\u67d0\u4e9b\u91cd\u8981\u914d\u7f6e\u505a\u4e86\u4ec0\u4e48\u3002<\/p>\n\n<p>\u672c\u6587\u6240\u6709\u5185\u5bb9\u57fa\u4e8espring-security-4.0.1.RELEASE ,\u4f60\u53ef\u4ee5\u5728<a href=\"https:\/\/github.com\/spring-projects\/spring-security\">Github<\/a>\u4e2d\u627e\u5230\u5b83\uff0c\u6216\u8005\u4f7f\u7528Maven\u83b7\u53d6\uff0c\u5f15\u5165spring-security-config\u662f\u4e3a\u4e86\u901a\u8fc7\u547d\u540d\u7a7a\u95f4\u7b80\u5316\u914d\u7f6e\u3002<\/p>\n\n<div class=\"language-xml highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"nt\">&lt;dependency&gt;<\/span>\n    <span class=\"nt\">&lt;groupId&gt;<\/span>org.springframework.security<span class=\"nt\">&lt;\/groupId&gt;<\/span>\n    <span class=\"nt\">&lt;artifactId&gt;<\/span>spring-security-web<span class=\"nt\">&lt;\/artifactId&gt;<\/span>\n    <span class=\"nt\">&lt;version&gt;<\/span>4.0.1.RELEASE<span class=\"nt\">&lt;\/version&gt;<\/span>\n<span class=\"nt\">&lt;\/dependency&gt;<\/span>\n<span class=\"nt\">&lt;dependency&gt;<\/span>\n    <span class=\"nt\">&lt;groupId&gt;<\/span>org.springframework.security<span class=\"nt\">&lt;\/groupId&gt;<\/span>\n    <span class=\"nt\">&lt;artifactId&gt;<\/span>spring-security-config<span class=\"nt\">&lt;\/artifactId&gt;<\/span>\n    <span class=\"nt\">&lt;version&gt;<\/span>4.0.1.RELEASE<span class=\"nt\">&lt;\/version&gt;<\/span>\n<span class=\"nt\">&lt;\/dependency&gt;<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<h1 id=\"filter\">Filter<\/h1>\n\n<p>spring-security\u7684\u4e1a\u52a1\u6d41\u7a0b\u662f\u72ec\u7acb\u4e8e\u9879\u76ee\u7684\uff0c\u6211\u4eec\u9700\u8981\u5728web.xml\u4e2d\u6307\u5b9a\u5176\u5165\u53e3\uff0c\u6ce8\u610f\u8be5\u8fc7\u6ee4\u5668\u5fc5\u987b\u5728\u9879\u76ee\u7684\u8fc7\u6ee4\u5668\u4e4b\u524d\u3002<\/p>\n\n<div class=\"language-xml highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"nt\">&lt;filter&gt;<\/span>\n    <span class=\"nt\">&lt;filter-name&gt;<\/span>springSecurityFilterChain<span class=\"nt\">&lt;\/filter-name&gt;<\/span>\n    <span class=\"nt\">&lt;filter-class&gt;<\/span>org.springframework.web.filter.DelegatingFilterProxy<span class=\"nt\">&lt;\/filter-class&gt;<\/span>\n<span class=\"nt\">&lt;\/filter&gt;<\/span>\n<span class=\"nt\">&lt;filter-mapping&gt;<\/span>\n    <span class=\"nt\">&lt;filter-name&gt;<\/span>springSecurityFilterChain<span class=\"nt\">&lt;\/filter-name&gt;<\/span>\n    <span class=\"nt\">&lt;servlet-name&gt;<\/span>\/*<span class=\"nt\">&lt;\/servlet-name&gt;<\/span>\n<span class=\"nt\">&lt;\/filter-mapping&gt;<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u503c\u5f97\u4e00\u63d0\u7684\u662f\uff0c\u8be5\u8fc7\u6ee4\u5668\u7684\u540d\u5b57\u5177\u6709\u7279\u6b8a\u610f\u4e49\uff0c\u6ca1\u6709\u7279\u522b\u9700\u6c42\u4e0d\u5efa\u8bae\u4fee\u6539\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u8be5\u8fc7\u6ee4\u7684\u6e90\u7801\u4e2d\u770b\u5230\uff0c\u5176\u8fc7\u6ee4\u884c\u4e3a\u59d4\u6258\u7ed9\u4e86\u4e00\u4e2a<code class=\"language-plaintext highlighter-rouge\">delegate<\/code>\u5bf9\u8c61\uff0c\u8be5delegate\u5bf9\u8c61\u662f\u4e00\u4e2a\u4ecespring\u5bb9\u5668\u4e2d\u83b7\u53d6\u7684bean\uff0c\u4f9d\u636e\u7684beanid\u5c31\u662ffilter-name\u3002<\/p>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"nd\">@Override<\/span>\n<span class=\"kd\">protected<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">initFilterBean<\/span><span class=\"o\">()<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">ServletException<\/span> <span class=\"o\">{<\/span>\n\t<span class=\"kd\">synchronized<\/span> <span class=\"o\">(<\/span><span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">delegateMonitor<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n\t\t<span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">delegate<\/span> <span class=\"o\">==<\/span> <span class=\"kc\">null<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n\n\t\t\t<span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">targetBeanName<\/span> <span class=\"o\">==<\/span> <span class=\"kc\">null<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n\t\t\t\t<span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">targetBeanName<\/span> <span class=\"o\">=<\/span> <span class=\"n\">getFilterName<\/span><span class=\"o\">();<\/span>\n\t\t\t<span class=\"o\">}<\/span>\n\n\t\t\t<span class=\"nc\">WebApplicationContext<\/span> <span class=\"n\">wac<\/span> <span class=\"o\">=<\/span> <span class=\"n\">findWebApplicationContext<\/span><span class=\"o\">();<\/span>\n\t\t\t<span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">wac<\/span> <span class=\"o\">!=<\/span> <span class=\"kc\">null<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n\t\t\t\t<span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">delegate<\/span> <span class=\"o\">=<\/span> <span class=\"n\">initDelegate<\/span><span class=\"o\">(<\/span><span class=\"n\">wac<\/span><span class=\"o\">);<\/span>\n\t\t\t<span class=\"o\">}<\/span>\n\t\t<span class=\"o\">}<\/span>\n\t<span class=\"o\">}<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<h1 id=\"http\">HTTP<\/h1>\n\n<p>\u6211\u4eec\u53ef\u4ee5\u5728security\u4e2d\u58f0\u660e\u591a\u4e2a<code class=\"language-plaintext highlighter-rouge\">http<\/code>\u5143\u7d20\uff0c\u6bcf\u4e2ahttp\u5143\u7d20\u5c06\u4ea7\u751f\u4e00\u4e2a<code class=\"language-plaintext highlighter-rouge\">FilterChain<\/code>\uff0c\u8fd9\u4e9bFilterChain\u5c06\u6309\u7167\u58f0\u660e\u987a\u5e8f\u52a0\u5165\u5230<code class=\"language-plaintext highlighter-rouge\">FilterChainProxy<\/code>\u4e2d\uff0c\u800c\u8fd9\u4e2aFilterChainProxy\u5c31\u662fweb.xml\u4e2d\u5b9a\u4e49\u7684springSecurityFilterChain\u5185\u90e8\u7684<code class=\"language-plaintext highlighter-rouge\">delegate<\/code>\u3002<\/p>\n\n<div class=\"language-xml highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"nt\">&lt;security:http<\/span> <span class=\"na\">security=<\/span><span class=\"s\">\"none\"<\/span> <span class=\"na\">pattern=<\/span><span class=\"s\">\"\/favicon.ico\"<\/span> <span class=\"nt\">\/&gt;<\/span>\n<span class=\"nt\">&lt;security:http<\/span> <span class=\"na\">security=<\/span><span class=\"s\">\"none\"<\/span> <span class=\"na\">pattern=<\/span><span class=\"s\">\"\/resources\/**\"<\/span> <span class=\"nt\">\/&gt;<\/span>\n<span class=\"nt\">&lt;security:http<\/span> <span class=\"na\">security=<\/span><span class=\"s\">\"none\"<\/span> <span class=\"na\">pattern=<\/span><span class=\"s\">\"\/user\/login\"<\/span> <span class=\"nt\">\/&gt;<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u5728http\u5143\u7d20\u4e5f\u5c31\u662fFilterChain\u4e2d\uff0c\u4ee5\u8d23\u4efb\u94fe\u7684\u5f62\u5f0f\u5b58\u5728\u591a\u4e2a<code class=\"language-plaintext highlighter-rouge\">Filter<\/code>\uff0c\u8fd9\u4e9bFilter\u771f\u6b63\u6267\u884c\u8fc7\u6ee4\u64cd\u4f5c\uff0chttp\u6807\u7b7e\u4e2d\u7684\u8bb8\u591a\u914d\u7f6e\u9879\uff0c\u5982<code class=\"language-plaintext highlighter-rouge\"> &lt;security:http-basic\/&gt;<\/code>\u3001<code class=\"language-plaintext highlighter-rouge\">&lt;security:logout\/&gt;<\/code>\u7b49\uff0c\u5176\u5b9e\u5c31\u662f\u521b\u5efa\u6307\u5b9a\u7684Filter\uff0c\u4ee5\u4e0b\u8868\u683c\u5217\u4e3e\u4e86\u8fd9\u4e9bFilter\u3002<\/p>\n\n<p><img src=\"https:\/\/bit-ranger.github.io\/blog\/static\/img\/spring-security-filter.png\" alt=\"filter\" \/><\/p>\n\n<p>\u5229\u7528\u522b\u540d\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u81ea\u5b9a\u4e49\u7684\u8fc7\u6ee4\u5668\u52a0\u5165\u6307\u5b9a\u7684\u4f4d\u7f6e\uff0c\u6216\u8005\u66ff\u6362\u5176\u4e2d\u7684\u67d0\u4e2a\u8fc7\u6ee4\u5668\u3002<\/p>\n\n<div class=\"language-xml highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"nt\">&lt;security:custom-filter<\/span> <span class=\"na\">ref=<\/span><span class=\"s\">\"filterSecurityInterceptor\"<\/span> <span class=\"na\">before=<\/span><span class=\"s\">\"FILTER_SECURITY_INTERCEPTOR\"<\/span> <span class=\"nt\">\/&gt;<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u6574\u4f53\u6765\u770b\uff0c\u4e00\u4e2aFilterChainProxy\u4e2d\u53ef\u4ee5\u5305\u542b\u6709\u591a\u4e2aFilterChain\uff0c\u4e00\u4e2aFilterChain\u4e2d\u53c8\u53ef\u4ee5\u5305\u542b\u6709\u591a\u4e2aFilter\uff0c\u7136\u800c\u5bf9\u4e8e\u4e00\u4e2a\u65e2\u5b9a\u8bf7\u6c42\uff0c\u53ea\u4f1a\u4f7f\u7528\u5176\u4e2d\u4e00\u4e2aFilterChain\u3002<\/p>\n\n<h1 id=\"filterchain\">FilterChain<\/h1>\n\n<p><img src=\"https:\/\/bit-ranger.github.io\/blog\/static\/img\/spring-security-filterChain.jpg\" alt=\"filterChain\" \/><\/p>\n\n<p>\u4e0a\u56fe\u5217\u4e3e\u4e86\u4e00\u4e9bFilter, \u6b64\u5904\u5c06\u8bf4\u660e\u8fd9\u4e9bFilter\u7684\u4f5c\u7528, \u5728\u9700\u8981\u63d2\u5165\u81ea\u5b9a\u4e49Filter\u65f6, \u8fd9\u4e9b\u8bf4\u660e\u53ef\u4ee5\u4f5c\u4e3a\u53c2\u8003\u3002<\/p>\n\n<ul>\n  <li>\n    <p>SecurityContextPersistenceFilter\n  \u521b\u5efa\u4e00\u4e2a\u7a7a\u7684SecurityContext\uff08\u5982\u679csession\u4e2d\u6ca1\u6709SecurityContext\u5b9e\u4f8b\uff09\uff0c\u7136\u540e\u6301\u4e45\u5316\u5230session\u4e2d\u3002\u5728filter\u539f\u8def\u8fd4\u56de\u65f6\uff0c\u8fd8\u9700\u8981\u4fdd\u5b58\u8fd9\u4e2aSecurityContext\u5b9e\u4f8b\u5230session\u4e2d\u3002<\/p>\n  <\/li>\n  <li>\n    <p>RequestCacheAwareFilter\n  \u7528\u4e8e\u7528\u6237\u767b\u5f55\u6210\u529f\u540e\uff0c\u91cd\u65b0\u6062\u590d\u56e0\u4e3a\u767b\u5f55\u88ab\u6253\u65ad\u7684\u8bf7\u6c42<\/p>\n  <\/li>\n  <li>\n    <p>AnonymousAuthenticationFilter\n  \u5982\u679c\u4e4b\u524d\u7684\u8fc7\u6ee4\u5668\u90fd\u6ca1\u6709\u8ba4\u8bc1\u6210\u529f\uff0c\u5219\u4e3a\u5f53\u524d\u7684SecurityContext\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u7ecf\u8fc7\u533f\u540d\u8ba4\u8bc1\u7684token, \u6240\u6709\u4e0e\u8ba4\u8bc1\u76f8\u5173\u7684\u8fc7\u6ee4\u5668\uff08\u5982CasAuthenticationFilter\uff09\u90fd\u5e94\u5f53\u653e\u5728AnonymousAuthenticationFilter\u4e4b\u524d\u3002<\/p>\n  <\/li>\n  <li>\n    <p>SessionManagementFilter\n  1.session\u56fa\u5316\u4fdd\u62a4-\u901a\u8fc7session-fixation-protection\u914d\u7f6e\n  2.session\u5e76\u53d1\u63a7\u5236-\u901a\u8fc7concurrency-control\u914d\u7f6e<\/p>\n  <\/li>\n  <li>\n    <p>ExceptionTranslationFilter\n  \u4e3b\u8981\u62e6\u622a\u4e24\u7c7b\u5b89\u5168\u5f02\u5e38\uff1a\u8ba4\u8bc1\u5f02\u5e38\u3001\u8bbf\u95ee\u62d2\u7edd\u5f02\u5e38\u3002\u800c\u4e14\u4ec5\u4ec5\u662f\u6355\u83b7\u540e\u9762\u7684\u8fc7\u6ee4\u5668\u4ea7\u751f\u7684\u5f02\u5e38\u3002\u6240\u4ee5\u5728\u81ea\u5b9a\u4e49\u62e6\u622a\u5668\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u5728\u94fe\u4e2d\u7684\u987a\u5e8f\u3002<\/p>\n  <\/li>\n  <li>\n    <p>FilterSecurityInterceptor\n  \u901a\u8fc7\u51b3\u7b56\u7ba1\u7406\u5668\u3001\u8ba4\u8bc1\u7ba1\u7406\u5668\u3001\u5b89\u5168\u5143\u6570\u636e\u6765\u5224\u65ad\u7528\u6237\u662f\u5426\u80fd\u591f\u8bbf\u95ee\u8d44\u6e90\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h1 id=\"filtersecurityinterceptor\">FilterSecurityInterceptor<\/h1>\n\n<p>\u5982\u679c\u4e00\u4e2ahttp\u8bf7\u6c42\u80fd\u591f\u5339\u914dsecurity\u5b9a\u4e49\u7684\u89c4\u5219\uff0c\u90a3\u4e48\u8be5\u8bf7\u6c42\u5c06\u8fdb\u5165security\u5904\u7406\u6d41\u7a0b\uff0c\u5927\u4f53\u4e0a\uff0csecurity\u5206\u4e3a\u4e09\u4e2a\u90e8\u5206\uff1a<\/p>\n\n<ul>\n  <li>AuthenticationManager \u5904\u7406\u8ba4\u8bc1\u8bf7\u6c42<\/li>\n  <li>AccessDecisionManager \u63d0\u4f9b\u8bbf\u95ee\u51b3\u7b56<\/li>\n  <li>SecurityMetadataSource \u5143\u6570\u636e<\/li>\n<\/ul>\n\n<p>\u4ee5\u4e0b\u4ee3\u7801\u6458\u81ea<code class=\"language-plaintext highlighter-rouge\">AbstractSecurityInterceptor<\/code>\uff0c \u8fd9\u662f<code class=\"language-plaintext highlighter-rouge\">FilterSecurityInterceptor<\/code>\u7684\u7236\u7c7b\uff0c \u4e5f\u6b63\u662f\u5728\u6b64\u5904\u533a\u5206\u4e86web\u8bf7\u6c42\u62e6\u622a\u5668\u4e0e\u65b9\u6cd5\u8c03\u7528\u62e6\u622a\u5668\u3002(\u4ee3\u7801\u6709\u6240\u7cbe\u7b80)<\/p>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"kd\">protected<\/span> <span class=\"nc\">InterceptorStatusToken<\/span> <span class=\"nf\">beforeInvocation<\/span><span class=\"o\">(<\/span><span class=\"nc\">Object<\/span> <span class=\"n\">object<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n\n\t<span class=\"k\">if<\/span> <span class=\"o\">(!<\/span><span class=\"n\">getSecureObjectClass<\/span><span class=\"o\">().<\/span><span class=\"na\">isAssignableFrom<\/span><span class=\"o\">(<\/span><span class=\"n\">object<\/span><span class=\"o\">.<\/span><span class=\"na\">getClass<\/span><span class=\"o\">()))<\/span> <span class=\"o\">{<\/span>\n\t\t<span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">IllegalArgumentException<\/span><span class=\"o\">();<\/span>\n\t<span class=\"o\">}<\/span>\n\n\t<span class=\"nc\">Collection<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">ConfigAttribute<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">attributes<\/span> <span class=\"o\">=<\/span>\n\t        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">obtainSecurityMetadataSource<\/span><span class=\"o\">().<\/span><span class=\"na\">getAttributes<\/span><span class=\"o\">(<\/span><span class=\"n\">object<\/span><span class=\"o\">);<\/span>\n\n\t<span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">attributes<\/span> <span class=\"o\">==<\/span> <span class=\"kc\">null<\/span> <span class=\"o\">||<\/span> <span class=\"n\">attributes<\/span><span class=\"o\">.<\/span><span class=\"na\">isEmpty<\/span><span class=\"o\">())<\/span> <span class=\"o\">{<\/span>\n\t\t<span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">rejectPublicInvocations<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n\t\t\t<span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">IllegalArgumentException<\/span><span class=\"o\">();<\/span>\n\t\t<span class=\"o\">}<\/span>\n\t\t<span class=\"n\">publishEvent<\/span><span class=\"o\">(<\/span><span class=\"k\">new<\/span> <span class=\"nc\">PublicInvocationEvent<\/span><span class=\"o\">(<\/span><span class=\"n\">object<\/span><span class=\"o\">));<\/span>\n\t\t<span class=\"k\">return<\/span> <span class=\"kc\">null<\/span><span class=\"o\">;<\/span> <span class=\"c1\">\/\/ no further work post-invocation<\/span>\n\t<span class=\"o\">}<\/span>\n\n\t<span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"nc\">SecurityContextHolder<\/span><span class=\"o\">.<\/span><span class=\"na\">getContext<\/span><span class=\"o\">().<\/span><span class=\"na\">getAuthentication<\/span><span class=\"o\">()<\/span> <span class=\"o\">==<\/span> <span class=\"kc\">null<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n\t    <span class=\"c1\">\/\/...<\/span>\n\t<span class=\"o\">}<\/span>\n\n\t<span class=\"nc\">Authentication<\/span> <span class=\"n\">authenticated<\/span> <span class=\"o\">=<\/span> <span class=\"n\">authenticateIfRequired<\/span><span class=\"o\">();<\/span>\n\n\t<span class=\"c1\">\/\/ Attempt authorization<\/span>\n\t<span class=\"k\">try<\/span> <span class=\"o\">{<\/span>\n\t\t<span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">accessDecisionManager<\/span><span class=\"o\">.<\/span><span class=\"na\">decide<\/span><span class=\"o\">(<\/span><span class=\"n\">authenticated<\/span><span class=\"o\">,<\/span> <span class=\"n\">object<\/span><span class=\"o\">,<\/span> <span class=\"n\">attributes<\/span><span class=\"o\">);<\/span>\n\t<span class=\"o\">}<\/span>\n\t<span class=\"k\">catch<\/span> <span class=\"o\">(<\/span><span class=\"nc\">AccessDeniedException<\/span> <span class=\"n\">accessDeniedException<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n\t\t<span class=\"n\">publishEvent<\/span><span class=\"o\">(<\/span><span class=\"k\">new<\/span> <span class=\"nc\">AuthorizationFailureEvent<\/span><span class=\"o\">(<\/span><span class=\"n\">object<\/span><span class=\"o\">,<\/span> <span class=\"n\">attributes<\/span><span class=\"o\">,<\/span>\n\t\t            <span class=\"n\">authenticated<\/span><span class=\"o\">,<\/span><span class=\"n\">accessDeniedException<\/span><span class=\"o\">));<\/span>\n\t\t<span class=\"k\">throw<\/span> <span class=\"n\">accessDeniedException<\/span><span class=\"o\">;<\/span>\n\t<span class=\"o\">}<\/span>\n<span class=\"o\">}<\/span>\n\n\n<span class=\"kd\">private<\/span> <span class=\"nc\">Authentication<\/span> <span class=\"nf\">authenticateIfRequired<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\n    <span class=\"nc\">Authentication<\/span> <span class=\"n\">authentication<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">SecurityContextHolder<\/span><span class=\"o\">.<\/span><span class=\"na\">getContext<\/span><span class=\"o\">()<\/span>\n            <span class=\"o\">.<\/span><span class=\"na\">getAuthentication<\/span><span class=\"o\">();<\/span>\n\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">authentication<\/span><span class=\"o\">.<\/span><span class=\"na\">isAuthenticated<\/span><span class=\"o\">()<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"o\">!<\/span><span class=\"n\">alwaysReauthenticate<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"k\">return<\/span> <span class=\"n\">authentication<\/span><span class=\"o\">;<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"n\">authentication<\/span> <span class=\"o\">=<\/span> <span class=\"n\">authenticationManager<\/span><span class=\"o\">.<\/span><span class=\"na\">authenticate<\/span><span class=\"o\">(<\/span><span class=\"n\">authentication<\/span><span class=\"o\">);<\/span>\n\n    <span class=\"nc\">SecurityContextHolder<\/span><span class=\"o\">.<\/span><span class=\"na\">getContext<\/span><span class=\"o\">().<\/span><span class=\"na\">setAuthentication<\/span><span class=\"o\">(<\/span><span class=\"n\">authentication<\/span><span class=\"o\">);<\/span>\n\n    <span class=\"k\">return<\/span> <span class=\"n\">authentication<\/span><span class=\"o\">;<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u5728FilterSecurityInterceptor\u7684\u5904\u7406\u6d41\u7a0b\u4e2d\uff0c\u9996\u5148\u4f1a\u5904\u7406\u8ba4\u8bc1\u8bf7\u6c42\uff0c\u83b7\u53d6\u7528\u6237\u4fe1\u606f\uff0c\u7136\u540e\u51b3\u7b56\u5904\u7406\u5668\u6839\u636e\u7528\u6237\u4fe1\u606f\u4e0e\u6743\u9650\u5143\u6570\u636e\u8fdb\u884c\u51b3\u7b56\uff0c\u540c\u6837\uff0c\u8fd9\u4e09\u4e2a\u90e8\u5206\u90fd\u662f\u53ef\u4ee5\u81ea\u5b9a\u4e49\u7684\u3002<\/p>\n\n<div class=\"language-xml highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"c\">&lt;!-- \u81ea\u5b9a\u4e49\u8fc7\u6ee4\u5668 --&gt;<\/span>\n<span class=\"nt\">&lt;bean<\/span> <span class=\"na\">id=<\/span><span class=\"s\">\"filterSecurityInterceptor\"<\/span>\n            <span class=\"na\">class=<\/span><span class=\"s\">\"org.springframework.security.web.access.intercept.FilterSecurityInterceptor\"<\/span><span class=\"nt\">&gt;<\/span>\n    <span class=\"nt\">&lt;property<\/span> <span class=\"na\">name=<\/span><span class=\"s\">\"securityMetadataSource\"<\/span> <span class=\"na\">ref=<\/span><span class=\"s\">\"securityMetadataSource\"<\/span><span class=\"nt\">\/&gt;<\/span>\n    <span class=\"nt\">&lt;property<\/span> <span class=\"na\">name=<\/span><span class=\"s\">\"authenticationManager\"<\/span> <span class=\"na\">ref=<\/span><span class=\"s\">\"authenticationManager\"<\/span><span class=\"nt\">\/&gt;<\/span>\n    <span class=\"nt\">&lt;property<\/span> <span class=\"na\">name=<\/span><span class=\"s\">\"accessDecisionManager\"<\/span> <span class=\"na\">ref=<\/span><span class=\"s\">\"accessDecisionManager\"<\/span><span class=\"nt\">\/&gt;<\/span>\n<span class=\"nt\">&lt;\/bean&gt;<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<h1 id=\"authenticationmanager\">AuthenticationManager<\/h1>\n\n<p>AuthenticationManager\u5904\u7406\u8ba4\u8bc1\u8bf7\u6c42\uff0c\u7136\u800c\u5b83\u5e76\u4e0d\u76f4\u63a5\u5904\u7406\uff0c\u800c\u662f\u5c06\u5de5\u4f5c\u59d4\u6258\u7ed9\u4e86\u4e00\u4e2a<code class=\"language-plaintext highlighter-rouge\">ProviderManager<\/code>\uff0cProviderManager\u53c8\u5c06\u5de5\u4f5c\u59d4\u6258\u7ed9\u4e86\u4e00\u4e2a<code class=\"language-plaintext highlighter-rouge\">AuthenticationProvider<\/code>\u5217\u8868\uff0c\u53ea\u8981\u4efb\u4f55\u4e00\u4e2aAuthenticationProvider\u8ba4\u8bc1\u901a\u8fc7\uff0c\u5219AuthenticationManager\u8ba4\u8bc1\u901a\u8fc7\uff0c\u6211\u4eec\u53ef\u4ee5\u914d\u7f6e\u4e00\u4e2a\u6216\u8005\u591a\u4e2aAuthenticationProvider\uff0c\u8fd8\u53ef\u4ee5\u5bf9\u5bc6\u7801\u8fdb\u884c\u52a0\u5bc6\u3002<\/p>\n\n<div class=\"language-xml highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"nt\">&lt;security:authentication-manager<\/span> <span class=\"na\">id=<\/span><span class=\"s\">\"authenticationManager\"<\/span><span class=\"nt\">&gt;<\/span>\n    <span class=\"nt\">&lt;security:authentication-provider<\/span> <span class=\"na\">user-service-ref=<\/span><span class=\"s\">\"userDetailsService\"<\/span> <span class=\"nt\">&gt;<\/span>\n        <span class=\"nt\">&lt;security:password-encoder<\/span> <span class=\"na\">base64=<\/span><span class=\"s\">\"true\"<\/span> <span class=\"na\">hash=<\/span><span class=\"s\">\"md5\"<\/span><span class=\"nt\">&gt;<\/span>\n            <span class=\"nt\">&lt;security:salt-source<\/span> <span class=\"na\">user-property=<\/span><span class=\"s\">\"username\"<\/span><span class=\"nt\">\/&gt;<\/span>\n        <span class=\"nt\">&lt;\/security:password-encoder&gt;<\/span>\n    <span class=\"nt\">&lt;\/security:authentication-provider&gt;<\/span>\n<span class=\"nt\">&lt;\/security:authentication-manager&gt;<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u8003\u8651\u5230\u4e00\u79cd\u5e38\u89c1\u60c5\u5f62\uff0c\u7528\u6237\u8f93\u5165\u7528\u6237\u540d\u5bc6\u7801\uff0c\u7136\u540e\u4e0e\u6570\u636e\u6bd4\u5bf9\uff0c\u9a8c\u8bc1\u7528\u6237\u4fe1\u606f\uff0csecurity\u63d0\u4f9b\u4e86\u7c7b\u6765\u5904\u7406\u3002<\/p>\n\n<div class=\"language-xml highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"nt\">&lt;bean<\/span> <span class=\"na\">id=<\/span><span class=\"s\">\"userDetailsService\"<\/span>\n            <span class=\"na\">class=<\/span><span class=\"s\">\"org.springframework.security.core.userdetails.jdbc.JdbcDaoImpl\"<\/span> <span class=\"nt\">&gt;<\/span>\n     <span class=\"nt\">&lt;property<\/span> <span class=\"na\">name=<\/span><span class=\"s\">\"dataSource\"<\/span> <span class=\"na\">ref=<\/span><span class=\"s\">\"dataSource\"<\/span><span class=\"nt\">\/&gt;<\/span>\n<span class=\"nt\">&lt;\/bean&gt;<\/span>\n<\/code><\/pre><\/div><\/div>\n<p>JdbcDaoImpl\u4f7f\u7528\u5185\u7f6e\u7684SQL\u67e5\u8be2\u6570\u636e\uff0c\u8fd9\u4e9bSQL\u4ee5\u5e38\u91cf\u7684\u5f62\u5f0f\u51fa\u73b0\u5728JdbcDaoImpl\u5f00\u5934\uff0c\u540c\u6837\u53ef\u4ee5\u6ce8\u5165\u4fee\u6539\u3002<\/p>\n\n<h1 id=\"accessdecisionmanager\">AccessDecisionManager<\/h1>\n\n<p>AccessDecisionManager\u63d0\u4f9b\u8bbf\u95ee\u51b3\u7b56\uff0c\u5b83\u540c\u6837\u4e0d\u4f1a\u76f4\u63a5\u5904\u7406\uff0c\u800c\u662f\u4ec5\u4ec5\u62bd\u8c61\u4e3a\u4e00\u79cd\u6295\u7968\u89c4\u5219\uff0c\u7136\u540e\u51b3\u7b56\u884c\u4e3a\u59d4\u6258\u7ed9\u6240\u6709\u6295\u7968\u4eba\u3002<\/p>\n\n<div class=\"language-xml highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"c\">&lt;!-- \u51b3\u7b56\u7ba1\u7406\u5668 --&gt;<\/span>\n<span class=\"nt\">&lt;bean<\/span> <span class=\"na\">id=<\/span><span class=\"s\">\"accessDecisionManager\"<\/span>\n            <span class=\"na\">class=<\/span><span class=\"s\">\"org.springframework.security.access.vote.AffirmativeBased\"<\/span> <span class=\"nt\">&gt;<\/span>\n    <span class=\"nt\">&lt;property<\/span> <span class=\"na\">name=<\/span><span class=\"s\">\"allowIfAllAbstainDecisions\"<\/span> <span class=\"na\">value=<\/span><span class=\"s\">\"false\"<\/span><span class=\"nt\">\/&gt;<\/span>\n    <span class=\"nt\">&lt;constructor-arg<\/span> <span class=\"na\">index=<\/span><span class=\"s\">\"0\"<\/span><span class=\"nt\">&gt;<\/span>\n        <span class=\"nt\">&lt;list&gt;<\/span>\n           <span class=\"c\">&lt;!-- &lt;bean class=\"org.springframework.security.web.access.expression.WebExpressionVoter\"\/&gt;--&gt;<\/span>\n            <span class=\"nt\">&lt;bean<\/span> <span class=\"na\">class=<\/span><span class=\"s\">\"org.springframework.security.access.vote.RoleVoter\"<\/span><span class=\"nt\">&gt;<\/span>\n                <span class=\"c\">&lt;!-- \u652f\u6301\u6240\u6709\u89d2\u8272\u540d\u79f0\uff0c\u65e0\u9700\u524d\u7f00 --&gt;<\/span>\n                <span class=\"nt\">&lt;property<\/span> <span class=\"na\">name=<\/span><span class=\"s\">\"rolePrefix\"<\/span> <span class=\"na\">value=<\/span><span class=\"s\">\"\"<\/span><span class=\"nt\">\/&gt;<\/span>\n            <span class=\"nt\">&lt;\/bean&gt;<\/span>\n            <span class=\"nt\">&lt;bean<\/span> <span class=\"na\">class=<\/span><span class=\"s\">\"org.springframework.security.access.vote.AuthenticatedVoter\"<\/span><span class=\"nt\">\/&gt;<\/span>\n        <span class=\"nt\">&lt;\/list&gt;<\/span>\n    <span class=\"nt\">&lt;\/constructor-arg&gt;<\/span>\n<span class=\"nt\">&lt;\/bean&gt;<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>security\u63d0\u4f9b\u4e86\u4e09\u79cd\u6295\u7968\u89c4\u5219\uff1a<\/p>\n\n<ul>\n  <li>AffirmativeBased \u53ea\u8981\u6709\u4e00\u4e2avoter\u540c\u610f\u5c31\u901a\u8fc7<\/li>\n  <li>ConsensusBased \u53ea\u8981\u6295\u540c\u610f\u7968\u7684\u5927\u4e8e\u6295\u53cd\u5bf9\u7968\u7684\u5c31\u901a\u8fc7<\/li>\n  <li>UnanimousBased \u9700\u8981\u4e00\u81f4\u540c\u610f\u624d\u901a\u8fc7<\/li>\n<\/ul>\n\n<p>\u4ee5\u4e0b\u4e3a<code class=\"language-plaintext highlighter-rouge\">AffirmativeBased<\/code>\u51b3\u7b56\u8fc7\u7a0b<\/p>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">decide<\/span><span class=\"o\">(<\/span><span class=\"nc\">Authentication<\/span> <span class=\"n\">authentication<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Object<\/span> <span class=\"n\">object<\/span><span class=\"o\">,<\/span>\n\t\t<span class=\"nc\">Collection<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">ConfigAttribute<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">configAttributes<\/span><span class=\"o\">)<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">AccessDeniedException<\/span> <span class=\"o\">{<\/span>\n\t<span class=\"kt\">int<\/span> <span class=\"n\">deny<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span>\n\n\t<span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"nc\">AccessDecisionVoter<\/span> <span class=\"n\">voter<\/span> <span class=\"o\">:<\/span> <span class=\"n\">getDecisionVoters<\/span><span class=\"o\">())<\/span> <span class=\"o\">{<\/span>\n\t\t<span class=\"kt\">int<\/span> <span class=\"n\">result<\/span> <span class=\"o\">=<\/span> <span class=\"n\">voter<\/span><span class=\"o\">.<\/span><span class=\"na\">vote<\/span><span class=\"o\">(<\/span><span class=\"n\">authentication<\/span><span class=\"o\">,<\/span> <span class=\"n\">object<\/span><span class=\"o\">,<\/span> <span class=\"n\">configAttributes<\/span><span class=\"o\">);<\/span>\n\n\t\t<span class=\"k\">switch<\/span> <span class=\"o\">(<\/span><span class=\"n\">result<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n\t\t<span class=\"k\">case<\/span> <span class=\"nc\">AccessDecisionVoter<\/span><span class=\"o\">.<\/span><span class=\"na\">ACCESS_GRANTED<\/span><span class=\"o\">:<\/span>\n\t\t\t<span class=\"k\">return<\/span><span class=\"o\">;<\/span>\n\n\t\t<span class=\"k\">case<\/span> <span class=\"nc\">AccessDecisionVoter<\/span><span class=\"o\">.<\/span><span class=\"na\">ACCESS_DENIED<\/span><span class=\"o\">:<\/span>\n\t\t\t<span class=\"n\">deny<\/span><span class=\"o\">++;<\/span>\n\n\t\t\t<span class=\"k\">break<\/span><span class=\"o\">;<\/span>\n\n\t\t<span class=\"k\">default<\/span><span class=\"o\">:<\/span>\n\t\t\t<span class=\"k\">break<\/span><span class=\"o\">;<\/span>\n\t\t<span class=\"o\">}<\/span>\n\t<span class=\"o\">}<\/span>\n\n\t<span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">deny<\/span> <span class=\"o\">&gt;<\/span> <span class=\"mi\">0<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n\t\t<span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">AccessDeniedException<\/span><span class=\"o\">(<\/span><span class=\"n\">messages<\/span><span class=\"o\">.<\/span><span class=\"na\">getMessage<\/span><span class=\"o\">(<\/span>\n\t\t\t\t<span class=\"s\">\"AbstractAccessDecisionManager.accessDenied\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"Access is denied\"<\/span><span class=\"o\">));<\/span>\n\t<span class=\"o\">}<\/span>\n\n\t<span class=\"c1\">\/\/ To get this far, every AccessDecisionVoter abstained<\/span>\n\t<span class=\"n\">checkAllowIfAllAbstainDecisions<\/span><span class=\"o\">();<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<h1 id=\"securitymetadatasource\">SecurityMetadataSource<\/h1>\n\n<p>SecurityMetadataSource\u5b9a\u4e49\u6743\u9650\u5143\u6570\u636e\uff08\u5982\u8d44\u6e90\u4e0e\u89d2\u8272\u7684\u5173\u7cfb\uff09\uff0c\u5e76\u63d0\u4f9b\u4e86\u4e00\u4e2a\u6838\u5fc3\u65b9\u6cd5<code class=\"language-plaintext highlighter-rouge\">Collection&lt;ConfigAttribute&gt; getAttributes(Object object)<\/code>\u6765\u83b7\u53d6\u8d44\u6e90\u5bf9\u5e94\u7684\u89d2\u8272\u5217\u8868\uff0c\u8fd9\u79cd\u7ed3\u6784\u975e\u5e38\u7c7b\u4f3c\u4e8eMap\u3002<\/p>\n\n<p>security\u63d0\u4f9b\u4e86<code class=\"language-plaintext highlighter-rouge\">DefaultFilterInvocationSecurityMetadataSource<\/code>\u6765\u8fdb\u884c\u89d2\u8272\u8bfb\u53d6\u64cd\u4f5c\uff0c\u5e76\u5c06\u6570\u636e\u5b58\u50a8\u59d4\u6258\u7ed9\u4e00\u4e2a<code class=\"language-plaintext highlighter-rouge\">LinkedHashMap<\/code>\u5bf9\u8c61\u3002<\/p>\n\n<div class=\"language-xml highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"c\">&lt;!-- \u8d44\u6e90\u4e0e\u89d2\u8272\u5173\u7cfb\u5143\u6570\u636e --&gt;<\/span>\n<span class=\"nt\">&lt;bean<\/span> <span class=\"na\">id=<\/span><span class=\"s\">\"securityMetadataSource\"<\/span>\n            <span class=\"na\">class=<\/span><span class=\"s\">\"org.springframework.security.web.access.intercept.DefaultFilterInvocationSecurityMetadataSource\"<\/span><span class=\"nt\">&gt;<\/span>\n    <span class=\"nt\">&lt;constructor-arg<\/span> <span class=\"na\">index=<\/span><span class=\"s\">\"0\"<\/span><span class=\"nt\">&gt;<\/span>\n        <span class=\"nt\">&lt;bean<\/span> <span class=\"na\">class=<\/span><span class=\"s\">\"top.rainynight.site.core.RequestMapFactoryBean\"<\/span><span class=\"nt\">&gt;<\/span>\n            <span class=\"nt\">&lt;property<\/span> <span class=\"na\">name=<\/span><span class=\"s\">\"dataSource\"<\/span> <span class=\"na\">ref=<\/span><span class=\"s\">\"dataSource\"<\/span><span class=\"nt\">\/&gt;<\/span>\n        <span class=\"nt\">&lt;\/bean&gt;<\/span>\n    <span class=\"nt\">&lt;\/constructor-arg&gt;<\/span>\n<span class=\"nt\">&lt;\/bean&gt;<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>DefaultFilterInvocationSecurityMetadataSource\u83b7\u53d6\u89d2\u8272\u65b9\u6cd5<\/p>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"kd\">public<\/span> <span class=\"nc\">Collection<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">ConfigAttribute<\/span><span class=\"o\">&gt;<\/span> <span class=\"nf\">getAttributes<\/span><span class=\"o\">(<\/span><span class=\"nc\">Object<\/span> <span class=\"n\">object<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n\t<span class=\"kd\">final<\/span> <span class=\"nc\">HttpServletRequest<\/span> <span class=\"n\">request<\/span> <span class=\"o\">=<\/span> <span class=\"o\">((<\/span><span class=\"nc\">FilterInvocation<\/span><span class=\"o\">)<\/span> <span class=\"n\">object<\/span><span class=\"o\">).<\/span><span class=\"na\">getRequest<\/span><span class=\"o\">();<\/span>\n\t<span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Map<\/span><span class=\"o\">.<\/span><span class=\"na\">Entry<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">RequestMatcher<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Collection<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">ConfigAttribute<\/span><span class=\"o\">&gt;&gt;<\/span> <span class=\"n\">entry<\/span> <span class=\"o\">:<\/span> <span class=\"n\">requestMap<\/span>\n\t\t\t<span class=\"o\">.<\/span><span class=\"na\">entrySet<\/span><span class=\"o\">())<\/span> <span class=\"o\">{<\/span>\n\t\t<span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">entry<\/span><span class=\"o\">.<\/span><span class=\"na\">getKey<\/span><span class=\"o\">().<\/span><span class=\"na\">matches<\/span><span class=\"o\">(<\/span><span class=\"n\">request<\/span><span class=\"o\">))<\/span> <span class=\"o\">{<\/span>\n\t\t\t<span class=\"k\">return<\/span> <span class=\"n\">entry<\/span><span class=\"o\">.<\/span><span class=\"na\">getValue<\/span><span class=\"o\">();<\/span>\n\t\t<span class=\"o\">}<\/span>\n\t<span class=\"o\">}<\/span>\n\t<span class=\"k\">return<\/span> <span class=\"kc\">null<\/span><span class=\"o\">;<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n","pubDate":"Thu, 12 Mar 2015 00:00:00 +0000","link":"https:\/\/bit-ranger.github.io\/blog\/web\/spring-security\/","guid":"https:\/\/bit-ranger.github.io\/blog\/web\/spring-security\/","category":["spring","security","Java","web"]},{"title":"scheme \u89e3\u91ca\u5668","description":"<p>\u524d\u6bb5\u65f6\u95f4\u9488\u5bf9 <a href=\"http:\/\/baike.baidu.com\/link?url=wgd84RHmek_qWtVHP9uhUL97pPelbW1iiUjF39rRuIrSHeG5ekDywMoiyWXDFgkaz3sdkYS2TRXs29CzMa7paa\">scheme<\/a> \u8bed\u8a00\u5199\u4e86\u4e00\u4e2a\u89e3\u91ca\u5668\uff0c\u73b0\u5728\u5c31 fork \u4e00\u4e0b\u5f53\u65f6\u60f3\u6cd5\uff0c\u6574\u7406\u4e00\u4e0b\u5176\u4e2d\u7684\u8109\u7edc\uff0c\u505a\u4e00\u4e2a\u601d\u7ef4\u5feb\u7167\uff0c\u4ee5\u671f\u4e0b\u6b21\u7528C\u8bed\u8a00\u6765\u5b9e\u73b0\u65f6\u53ef\u4ee5\u987a\u5229\u5730\u8fdb\u884c\u3002\n\u6210\u54c1\u5728\u6b64\uff1a<a href=\"https:\/\/github.com\/dubuyuye\/scheme-bootstrap\">scheme-bootstrap<\/a>\u3002<\/p>\n\n<ul id=\"markdown-toc\">\n  <li><a href=\"#\u8bcd\u6cd5\u4f5c\u7528\u57df\" id=\"markdown-toc-\u8bcd\u6cd5\u4f5c\u7528\u57df\">\u8bcd\u6cd5\u4f5c\u7528\u57df<\/a><\/li>\n  <li><a href=\"#\u62bd\u8c61\u8bed\u6cd5\u6811\" id=\"markdown-toc-\u62bd\u8c61\u8bed\u6cd5\u6811\">\u62bd\u8c61\u8bed\u6cd5\u6811<\/a><\/li>\n  <li><a href=\"#\u8bed\u6cd5\" id=\"markdown-toc-\u8bed\u6cd5\">\u8bed\u6cd5<\/a><\/li>\n  <li><a href=\"#\u57fa\u672c\u64cd\u4f5c\u548c\u503c\" id=\"markdown-toc-\u57fa\u672c\u64cd\u4f5c\u548c\u503c\">\u57fa\u672c\u64cd\u4f5c\u548c\u503c<\/a><\/li>\n  <li><a href=\"#\u8bed\u6cd5\u7cd6\" id=\"markdown-toc-\u8bed\u6cd5\u7cd6\">\u8bed\u6cd5\u7cd6<\/a>    <ul>\n      <li><a href=\"#letletletrec\" id=\"markdown-toc-letletletrec\">let,let*,letrec<\/a><\/li>\n    <\/ul>\n  <\/li>\n  <li><a href=\"#\u5185\u90e8\u5b9a\u4e49\" id=\"markdown-toc-\u5185\u90e8\u5b9a\u4e49\">\u5185\u90e8\u5b9a\u4e49<\/a><\/li>\n  <li><a href=\"#\u60f0\u6027\u6c42\u503c\" id=\"markdown-toc-\u60f0\u6027\u6c42\u503c\">\u60f0\u6027\u6c42\u503c<\/a><\/li>\n  <li><a href=\"#\u5c3e\u8c03\u7528\u4f18\u5316\" id=\"markdown-toc-\u5c3e\u8c03\u7528\u4f18\u5316\">\u5c3e\u8c03\u7528\u4f18\u5316<\/a><\/li>\n  <li><a href=\"#\u5783\u573e\u56de\u6536\" id=\"markdown-toc-\u5783\u573e\u56de\u6536\">\u5783\u573e\u56de\u6536<\/a><\/li>\n<\/ul>\n\n<h1 id=\"\u8bcd\u6cd5\u4f5c\u7528\u57df\">\u8bcd\u6cd5\u4f5c\u7528\u57df<\/h1>\n\n<p>\u4e00\u6761\u8bed\u53e5\uff0c\u5728\u4e0d\u540c\u7684\u51fd\u6570\u5f53\u4e2d\u53ef\u80fd\u5177\u5907\u4e0d\u540c\u7684\u542b\u4e49\uff0c\u5176\u4e2d\u53d8\u91cf\u7684\u503c\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u4f5c\u7528\u57df\uff0c\u6240\u4ee5\u5bf9\u4e00\u6761\u8bed\u53e5\u8fdb\u884c\u89e3\u91ca\u65f6\u9700\u8981\u8003\u8651\u5f53\u65f6\u7684\u4e0a\u4e0b\u6587\u3002\n\u7136\u800clisp\u662f\u4e00\u79cd\u51fd\u6570\u5f0f\u7684\u7f16\u7a0b\u8bed\u8a00\uff0c\u51fd\u6570\u53ef\u4ee5\u88ab\u5f53\u6210\u6570\u636e\u6765\u8fdb\u884c\u4f20\u9012\uff0c\u8fd9\u4f1a\u4ea7\u751f\u4e00\u4e2a\u95ee\u9898\uff0c\u5982\u679c\u51fd\u6570\u4f53\u4e2d\u5b58\u5728\u81ea\u7531\u53d8\u91cf\uff0c\u90a3\u4e48\u8fd9\u4e2a\u51fd\u6570\u7684\u884c\u4e3a\u5c06\u4ea7\u751f\u4e0d\u53ef\u63a7\u7684\u53d8\u5316\uff0c\n\u95ee\u9898\u91cd\u70b9\u4e0d\u662f\u53d8\u5316\uff0c\u800c\u662f\u4e0d\u53ef\u63a7\uff0c\u5728\u8bed\u8a00\u7684\u4f7f\u7528\u8005\u4e0d\u9700\u8981\u51fd\u6570\u884c\u4e3a\u53d8\u5316\u7684\u65f6\u5019\uff0c\u81ea\u7531\u53d8\u91cf\u4f1a\u4ece\u5916\u90e8\u4f5c\u7528\u57df\u53d6\u503c\uff0c\u81ea\u52a8\u4ea7\u751f\u884c\u4e3a\u7684\u53d8\u5316\u3002\n\u8fd9\u79cd\u4f5c\u7528\u57df\u53eb\u505a\u52a8\u6001\u4f5c\u7528\u57df \uff08Dynamic scope \uff09\u3002<\/p>\n\n<p>\u50cfjava\uff0cjavascript\u4e4b\u7c7b\u7684\u8bed\u8a00\uff0c\u90fd\u662f\u5728\u5bf9\u8c61\u5185\u90e8\u7ef4\u62a4\u4e00\u4e2a\u6210\u5458\u53d8\u91cf\uff0c\u51fd\u6570\u4e2d\u81ea\u7531\u7684\u5c40\u90e8\u53d8\u91cf\u6839\u636e\u8fd9\u4e2a\u6210\u5458\u53d8\u91cf\u7684\u503c\u6765\u786e\u5b9a\u884c\u4e3a\uff0c\u867d\u7136\u51fd\u6570\u7684\u884c\u4e3a\u90fd\u53ef\u53d8\uff0c\u4f46\u5b83\u662f\u53ef\u63a7\u7684\u3002\n\u4e3a\u4e86\u5b9e\u73b0\u53ef\u63a7\uff0c\u6211\u4eec\u9700\u8981\u8ba9\u8bed\u8a00\u6ee1\u8db3\u4eba\u7684\u76f4\u89c9\uff0c\u5373\u4f5c\u7528\u57df\u548c\u624b\u5199\u7684\u4ee3\u7801\u7ed3\u6784\u76f8\u540c\uff0c\u5373\u4f7f\u4e00\u4e2a\u51fd\u6570\u4f1a\u88ab\u4f20\u9012\uff0c\u5176\u5185\u90e8\u53d8\u91cf\u7684\u503c\u4e5f\u5e94\u5f53\u8ffd\u6eaf\u5230\u51fd\u6570\u5b9a\u4e49\u65f6\u7684\u4f5c\u7528\u57df\u4e2d\u3002\n\u8fd9\u79cd\u4f5c\u7528\u57df\u5c31\u53eb\u505a\u8bcd\u6cd5\u4f5c\u7528\u57df \uff08Lexical scope\uff09\u3002<\/p>\n\n<p>\u663e\u7136\uff0c\u5b9e\u73b0\u8bcd\u6cd5\u4f5c\u7528\u57df\u6bd4\u52a8\u6001\u4f5c\u7528\u57df\u590d\u6742\u4e9b\u3002\u5b9e\u73b0\u52a8\u6001\u4f5c\u7528\u57df\u65f6\uff0c\u51fd\u6570\u4f20\u9012\u53ea\u8981\u4f20\u9012\u51fd\u6570\u6587\u672c\uff0c\u7136\u540e\u63d2\u5165\u5230\u8c03\u7528\u8bed\u53e5\u4e2d\u8fdb\u884c\u89e3\u91ca\u5c31\u884c\u4e86\uff1b\n\u800c\u8bcd\u6cd5\u4f5c\u7528\u57df\u9700\u8981\u4e3a\u6bcf\u4e2a\u88ab\u4f20\u9012\u7684\u51fd\u6570\u7ed1\u5b9a\u4e00\u4e2a\u5b9a\u4e49\u65f6\u7684\u4f5c\u7528\u57df\uff0c\u901a\u5e38\u5c06\u88ab\u4f20\u9012\u51fd\u6570\u4f53\u4e0e\u5b9a\u4e49\u65f6\u7684\u4f5c\u7528\u57df\u6253\u5305\u6210\u4e00\u4e2a\u6570\u636e\u7ed3\u6784\uff0c\u8fd9\u4e2a\u7ed3\u6784\u53eb\u505a<code class=\"language-plaintext highlighter-rouge\">\u95ed\u5305<\/code>\u3002\njavascript\u5c31\u662f\u4f7f\u7528\u95ed\u5305\u4f20\u9012\u51fd\u6570\u7684\u3002<\/p>\n\n<h1 id=\"\u62bd\u8c61\u8bed\u6cd5\u6811\">\u62bd\u8c61\u8bed\u6cd5\u6811<\/h1>\n\n<p>\u8bed\u8a00\u88ab\u5199\u4e0b\u6765\u4e4b\u540e\u53ea\u662f\u4e00\u4e2a\u6587\u672c\uff0c\u5176\u5185\u5bb9\u662f\u5bf9\u67d0\u79cd\u6570\u636e\u7ed3\u6784\u7684\u5f62\u5f0f\u5316\u63cf\u8ff0\uff0c\u5728\u5bf9\u8bed\u8a00\u8fdb\u884c\u89e3\u91ca\u524d\uff0c\u5fc5\u987b\u5148\u5bf9\u8fd9\u4e2a\u6587\u672c\u8fdb\u884c\u89e3\u6790\uff0c\u8ba9\u5176\u63cf\u8ff0\u7684\u7ed3\u6784\u51fa\u73b0\u5728\u5185\u5b58\u4e2d\uff0c\u8fd9\u79cd\u7ed3\u6784\u53eb\u505a\u62bd\u8c61\u8bed\u6cd5\u6811 \uff08AST\uff09\u3002\n\u8fd9\u4e2a\u8fc7\u7a0b\u6bd4\u8f83\u4e4f\u5473\uff0c\u65e0\u975e\u662f\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u626b\u63cf\uff0c\u53d1\u73b0\u5d4c\u5957\u62ec\u53f7\u5c31\u5c06\u5176\u4f5c\u4e3a\u6811\u4e2d\u7684\u4e00\u4e2a\u8282\u70b9\u3002\u4e3a\u4e86\u8df3\u8fc7\u8fd9\u4e2a\u8fc7\u7a0b\uff0c\u6211\u9009\u62e9\u7528scheme\u6765\u5199\u89e3\u91ca\u5668\uff0clisp \u5929\u751f\u5c31\u9002\u5408\u8fdb\u884c\u8fd9\u6837\u7684\u8868\u5904\u7406\u3002\n\u7c7b\u4f3c\u8fd9\u6837\u7528\u81ea\u5df1\u6765\u89e3\u91ca\u81ea\u5df1\u7684\u884c\u4e3a\u53eb\u505a\u81ea\u4e3e\u3002<\/p>\n\n<h1 id=\"\u8bed\u6cd5\">\u8bed\u6cd5<\/h1>\n\n<p>\u89e3\u91ca\u5668\u9010\u884c\u89e3\u91ca\u8bed\u53e5\uff0c\u90a3\u4e48\u78b0\u5230\u4e0d\u540c\u7684\u8bed\u6cd5\u5173\u952e\u5b57\u65f6\u5e94\u5f53\u89e6\u53d1\u4e0d\u540c\u7684\u89e3\u91ca\u884c\u4e3a\u3002<\/p>\n\n<ul>\n  <li><strong>\u81ea\u6c42\u503c\u8868\u8fbe\u5f0f<\/strong><\/li>\n<\/ul>\n\n<p>\u5f53\u78b0\u5230\u6570\u5b57\u548c\u5b57\u7b26\u4e32\u65f6\uff0c\u8868\u793a\u8fd9\u662f\u4e00\u4e2a\u81ea\u6c42\u503c\u8868\u8fbe\u5f0f\uff0c\u5373\u5199\u4e0b\u7684\u6587\u672c\u5c31\u662f\u503c\u3002<\/p>\n\n<ul>\n  <li><strong>quote<\/strong><\/li>\n<\/ul>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">quote<\/span> <span class=\"nv\">foo<\/span><span class=\"p\">)<\/span>\n<\/code><\/pre><\/div><\/div>\n<p>\u5f15\u53f7\u8868\u8fbe\u5f0f\u7684\u503c\u662f\u53bb\u6389\u5f15\u53f7\u540e\u7684\u5185\u5bb9\uff0c\u5176\u4e2d <code class=\"language-plaintext highlighter-rouge\">'foo<\/code> \u7b49\u4ef7\u4e8e <code class=\"language-plaintext highlighter-rouge\">(quote foo)<\/code>\u3002<\/p>\n\n<ul>\n  <li><strong>begin<\/strong><\/li>\n<\/ul>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">begin<\/span> <span class=\"nv\">s1<\/span> <span class=\"nv\">s2<\/span><span class=\"p\">)<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>begin \u8868\u8fbe\u5f0f\u8868\u793a\u5176\u5185\u5bb9\u662f\u987a\u5e8f\u7684\u591a\u6761\u8bed\u53e5\uff0c\u67d0\u4e9b\u8868\u8fbe\u5f0f\u53ea\u80fd\u652f\u6301\u5355\u4e00\u7684\u8bed\u53e5\uff0c\u7528begin\u5305\u88f9\u8fd9\u4e9b\u8bed\u53e5\u540e\uff0c\u5c31\u80fd\u5f53\u505a\u4e00\u6761\u8bed\u53e5\u4f7f\u7528\u3002<\/p>\n\n<ul>\n  <li><strong>if<\/strong><\/li>\n<\/ul>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">if<\/span> <span class=\"nv\">&lt;predicate&gt;<\/span> <span class=\"nv\">&lt;consequent&gt;<\/span> <span class=\"nv\">&lt;alternative&gt;<\/span> <span class=\"p\">)<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u5bf9if\u7684\u5904\u7406\u662f\u975e\u5e38\u5bb9\u6613\u7684\uff0c\u89e3\u91ca\u5668\u5148\u5bf9 <code class=\"language-plaintext highlighter-rouge\">predicate<\/code> \u6c42\u503c\uff0c\u5982\u679c\u503c\u4e3a\u771f\u5219\u5bf9 <code class=\"language-plaintext highlighter-rouge\">consequent<\/code> \u6c42\u503c\uff0c\u5426\u5219\u5bf9 <code class=\"language-plaintext highlighter-rouge\">alternative<\/code> \u6c42\u503c\u3002<\/p>\n\n<ul>\n  <li><strong>lambda<\/strong><\/li>\n<\/ul>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">lambda<\/span> <span class=\"p\">(<\/span><span class=\"nf\">x<\/span> <span class=\"nv\">y<\/span><span class=\"p\">)<\/span>\n    <span class=\"p\">(<\/span><span class=\"nb\">+<\/span> <span class=\"nv\">x<\/span> <span class=\"nv\">y<\/span><span class=\"p\">))<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>lambda \u8868\u8fbe\u5f0f\u8868\u793a\u4e00\u4e2a\u51fd\u6570\uff0c\u5bf9\u5176\u6c42\u503c\u5c31\u662f\u5c06\u51fd\u6570\u4f53\uff0c\u5f62\u53c2\u5217\u8868\uff0c\u4f5c\u7528\u57df\u6253\u5305\u3002<\/p>\n\n<ul>\n  <li><strong>define<\/strong><\/li>\n<\/ul>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">define<\/span> <span class=\"nv\">var<\/span> <span class=\"nv\">Foo<\/span><span class=\"p\">)<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>define \u8868\u8fbe\u5f0f\u8868\u793a\u5b9a\u4e49\uff0c\u5904\u7406\u65b9\u5f0f\u662f\u6c42\u51fa <code class=\"language-plaintext highlighter-rouge\">Foo<\/code> \u7684\u503c\u7136\u540e\u4e0e <code class=\"language-plaintext highlighter-rouge\">var<\/code> \u7ed1\u5b9a\uff0c\u653e\u5165\u5230\u5f53\u524d\u4f5c\u7528\u57df\u4e2d\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\u9690\u542b\u4e86\u5bf9\u51fd\u6570\u7684\u5b9a\u4e49\uff0c\u56e0\u4e3a <code class=\"language-plaintext highlighter-rouge\">Foo<\/code> \u53ef\u80fd\u5c31\u662f\u4e00\u4e2alambda\u3002<\/p>\n\n<ul>\n  <li><strong>set!<\/strong><\/li>\n<\/ul>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">set!<\/span> <span class=\"nv\">var<\/span> <span class=\"nv\">Foo<\/span><span class=\"p\">)<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>set! \u8bed\u53e5\u63d0\u4f9b\u4e86\u4fee\u6539\u53d8\u91cf\u503c\u7684\u80fd\u529b\uff0c\u5982\u679c\u6ca1\u6709\u8fd9\u4e2a\u5173\u952e\u5b57\uff0cscheme \u5c31\u662f\u7eaf\u7cb9\u7684\u51fd\u6570\u5f0f\u8bed\u8a00\uff0c\u5176\u51fd\u6570\u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u526f\u4f5c\u7528\uff0c\u51fd\u6570\u7684\u884c\u4e3a\u5c06\u4e0d\u53ef\u53d8\u3002\n\u5176\u5904\u7406\u65b9\u5f0f\u7c7b\u4f3c\u4e8edefine\uff0c\u533a\u522b\u662f\u4e00\u4e2a\u65b0\u589e\uff0c\u4e00\u4e2a\u4fee\u6539\u3002\u9700\u8981\u6ce8\u610f define \u5e76\u4e0d\u80fd\u4ee3\u66ff set!, define \u5b9a\u4e49\u7684\u53d8\u91cf\u53ea\u80fd\u5728\u67d0\u4e2a\u4f5c\u7528\u57df\u5185\u5c4f\u853d\u5916\u90e8\u7684\u540c\u540d\u53d8\u91cf\uff1b\n\u800cset!\u5c06\u4f1a\u6cbf\u7740\u4f5c\u7528\u57df\u94fe\u4e00\u76f4\u5411\u4e0a\u5bfb\u627e\u5339\u914d\u7684\u53d8\u91cf\u540d\uff0c\u7136\u540e\u8fdb\u884c\u4fee\u6539\u3002<\/p>\n\n<ul>\n  <li><strong>\u53d8\u91cf<\/strong><\/li>\n<\/ul>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"nv\">foo<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u5bf9\u53d8\u91cf\u6c42\u503c\u7684\u8fc7\u7a0b\u4e0e set! \u7c7b\u4f3c\uff0c\u89e3\u91ca\u5668\u5c06\u6cbf\u7740\u4f5c\u7528\u57df\u94fe\u4e00\u76f4\u5411\u4e0a\u5bfb\u627e\u5339\u914d\u7684\u53d8\u91cf\u540d\uff0c\u7136\u540e\u53d6\u51fa\u53d8\u91cf\u7684\u503c\u3002<\/p>\n\n<ul>\n  <li><strong>\u51fd\u6570\u8c03\u7528<\/strong><\/li>\n<\/ul>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"nf\">plus<\/span> <span class=\"nv\">a<\/span> <span class=\"nv\">b<\/span><span class=\"p\">)<\/span>\n<span class=\"p\">((<\/span><span class=\"k\">lambda<\/span> <span class=\"p\">(<\/span><span class=\"nf\">x<\/span> <span class=\"nv\">y<\/span><span class=\"p\">)<\/span>\n    <span class=\"p\">(<\/span><span class=\"nb\">+<\/span> <span class=\"nv\">x<\/span> <span class=\"nv\">y<\/span><span class=\"p\">))<\/span> <span class=\"nv\">a<\/span> <span class=\"nv\">b<\/span><span class=\"p\">)<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u51fd\u6570\u8c03\u7528\u770b\u4f3c\u6709\u4e24\u79cd\u5f62\u5f0f\uff0c\u5176\u5b9e\u672c\u8d28\u662f\u4e00\u79cd\uff0c\u5bf9\u53d8\u91cf <code class=\"language-plaintext highlighter-rouge\">plus<\/code> \u7684\u6c42\u503c\u548c\u5bf9 <code class=\"language-plaintext highlighter-rouge\">lambda<\/code> \u7684\u6c42\u503c\u90fd\u5c06\u5f97\u5230\u4e00\u4e2a\u95ed\u5305\uff0c\u6240\u4ee5\u51fd\u6570\u6c42\u503c\u7684\u771f\u5b9e\u8fc7\u7a0b\u662f\uff0c\u6c42\u53c2\u6570\u7684\u503c\uff0c\n\u5c06\u53c2\u6570\u4f20\u9012\u7ed9\u95ed\u5305\uff0c\u7136\u540e\u6c42\u95ed\u5305\u7684\u503c\u3002\u5bf9\u95ed\u5305\u6c42\u503c\u7684\u8fc7\u7a0b\u4e3a\uff0c\u6269\u5c55\u4f5c\u7528\u57df\uff0c\u5c06\u53c2\u6570\u503c\u4e0e\u5bf9\u5e94\u7684\u5f62\u53c2\u540d\u7ed1\u5b9a\u5e76\u653e\u5165\u4f5c\u7528\u57df\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u7c7b\u4f3c\u4e8edefine\uff0c\n\u7136\u540e\u8fd4\u56de\u95ed\u5305\u4e2d\u7684\u51fd\u6570\u8fc7\u7a0b\u4f53\uff0c\u8be5\u8fc7\u7a0b\u4f53\u4e3a\u4e00\u6761\u6216\u591a\u6761\u8bed\u53e5\uff0c\u6bcf\u6761\u8bed\u53e5\u90fd\u9700\u8981\u88ab\u8fdb\u884c\u89e3\u91ca\uff0c\u8fd9\u4fbf\u4ea7\u751f\u4e00\u4e2a\u9012\u5f52\u7684\u89e3\u91ca\u8fc7\u7a0b\u3002<\/p>\n\n<h1 id=\"\u57fa\u672c\u64cd\u4f5c\u548c\u503c\">\u57fa\u672c\u64cd\u4f5c\u548c\u503c<\/h1>\n\n<p>\u51fd\u6570\u5e76\u4e0d\u80fd\u4ece\u65e0\u5230\u6709\u5b9a\u4e49\u51fa\u6765\uff0c\u5176\u8fc7\u7a0b\u603b\u4f1a\u4f7f\u7528\u4e00\u4e9b\u5176\u4ed6\u7684\u51fd\u6570\uff0c\u4f8b\u5982\u52a0\u6cd5\uff0c\u90a3\u4e48\u52a0\u6cd5\u4ece\u4f55\u800c\u6765\uff1f\u4e8b\u5b9e\u4e0a\uff0c\u8fd9\u4e9b\u975e\u5e38\u57fa\u672c\u7684\u64cd\u4f5c\u90fd\u662f\u65e0\u6cd5\u76f4\u63a5\u5b9a\u4e49\u51fa\u6765\u7684\uff0c\n\u5b83\u4eec\u9700\u8981\u4ece\u89e3\u91ca\u5668\u4e2d\u76f4\u63a5\u6620\u5c04\u7684\u3002\u4e3a\u4e86\u5b9e\u73b0\u65b9\u4fbf\uff0c\u4ee5\u4e0b\u64cd\u4f5c\u90fd\u76f4\u63a5\u4ece\u89e3\u91ca\u5668\u4e2d\u6620\u5c04\uff1a<\/p>\n<ul>\n  <li><code class=\"language-plaintext highlighter-rouge\">+<\/code> <code class=\"language-plaintext highlighter-rouge\">-<\/code> <code class=\"language-plaintext highlighter-rouge\">*<\/code> <code class=\"language-plaintext highlighter-rouge\">\/<\/code> (\u5176\u5b9e\u51cf\u4e58\u9664\u53ef\u4ee5\u7528\u52a0\u6cd5\u6765\u5b9e\u73b0\uff0c\u4f46\u662f\u6ca1\u8fd9\u4e2a\u5fc5\u8981)\uff0c<\/li>\n  <li><code class=\"language-plaintext highlighter-rouge\">eq?<\/code><\/li>\n  <li><code class=\"language-plaintext highlighter-rouge\">car<\/code><\/li>\n  <li><code class=\"language-plaintext highlighter-rouge\">cdr<\/code><\/li>\n  <li><code class=\"language-plaintext highlighter-rouge\">cons<\/code><\/li>\n<\/ul>\n\n<p>scheme\u4e2d\u51fd\u6570\u4e0e\u6570\u636e\u7684\u754c\u9650\u975e\u5e38\u6a21\u7cca\uff0ccar cdr cons\u7b49\u770b\u4f3c\u57fa\u672c\u7684\u64cd\u4f5c\u5176\u5b9e\u53ef\u4ee5\u7528\u51fd\u6570\u6765\u5b9e\u73b0\u3002<\/p>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">define<\/span> <span class=\"p\">(<\/span><span class=\"nb\">cons<\/span> <span class=\"nv\">x<\/span> <span class=\"nv\">y<\/span><span class=\"p\">)<\/span>\n  <span class=\"p\">(<\/span><span class=\"k\">define<\/span> <span class=\"p\">(<\/span><span class=\"nf\">dispatch<\/span> <span class=\"nv\">tag<\/span><span class=\"p\">)<\/span>\n    <span class=\"p\">(<\/span><span class=\"k\">cond<\/span> <span class=\"p\">[(<\/span><span class=\"nb\">=<\/span> <span class=\"nv\">tag<\/span> <span class=\"mi\">0<\/span><span class=\"p\">)<\/span> <span class=\"nv\">x<\/span><span class=\"p\">]<\/span>\n          <span class=\"p\">[(<\/span><span class=\"nb\">=<\/span> <span class=\"nv\">tag<\/span> <span class=\"mi\">1<\/span><span class=\"p\">)<\/span> <span class=\"nv\">y<\/span><span class=\"p\">]))<\/span>\n  <span class=\"nv\">dispatch<\/span><span class=\"p\">)<\/span>\n\n<span class=\"p\">(<\/span><span class=\"k\">define<\/span> <span class=\"p\">(<\/span><span class=\"nb\">car<\/span> <span class=\"nv\">z<\/span><span class=\"p\">)<\/span>\n  <span class=\"p\">(<\/span><span class=\"nf\">z<\/span> <span class=\"mi\">0<\/span><span class=\"p\">))<\/span>\n\n<span class=\"p\">(<\/span><span class=\"k\">define<\/span> <span class=\"p\">(<\/span><span class=\"nb\">cdr<\/span> <span class=\"nv\">z<\/span><span class=\"p\">)<\/span>\n  <span class=\"p\">(<\/span><span class=\"nf\">z<\/span> <span class=\"mi\">1<\/span><span class=\"p\">))<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u57fa\u672c\u503c<\/p>\n\n<ul>\n  <li><code class=\"language-plaintext highlighter-rouge\">true<\/code><\/li>\n  <li><code class=\"language-plaintext highlighter-rouge\">false<\/code><\/li>\n<\/ul>\n\n<h1 id=\"\u8bed\u6cd5\u7cd6\">\u8bed\u6cd5\u7cd6<\/h1>\n\n<p>\u8bed\u6cd5\u7cd6\u5e76\u975e\u589e\u52a0\u4ec0\u4e48\u65b0\u529f\u80fd\uff0c\u800c\u662f\u8ba9\u67d0\u4e9b\u4ee5\u6709\u7684\u529f\u80fd\u5199\u8d77\u6765\u66f4\u8212\u670d\u3002\u5bf9\u8bed\u6cd5\u7cd6\u7684\u5904\u7406\u4e5f\u6bd4\u8f83\u7b80\u5355\uff0c\u5c31\u662f\u5c06\u5176\u7ed3\u6784\u53d8\u5316\u6210\u89e3\u91ca\u5668\u80fd\u591f\u8ba4\u8bc6\u7684\u5f62\u5f0f\uff0c\u7136\u540e\u53d1\u9001\u7ed9\u89e3\u91ca\u5668\u91cd\u65b0\u89e3\u91ca\u3002<\/p>\n\n<ul>\n  <li><strong>define<\/strong><\/li>\n<\/ul>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">define<\/span> <span class=\"p\">(<\/span><span class=\"nf\">foo<\/span> <span class=\"nv\">bar<\/span><span class=\"p\">)<\/span>\n  <span class=\"nv\">&lt;body&gt;<\/span><span class=\"p\">)<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u8be5\u8868\u793a\u6cd5\u4e3a\u51fd\u6570\u5b9a\u4e49\u7684\u8bed\u6cd5\u7cd6\uff0c\u7528\u57fa\u672c\u7684define\u5b9a\u4e49\u51fd\u6570\u65f6\uff0c\u6bcf\u6b21\u90fd\u8981\u5199\u51falambda\uff0c\u6bd4\u8f83\u7e41\u7410\u3002\n\u8be5\u8868\u793a\u6cd5\u7b49\u4ef7\u4e8e\u5982\u4e0b\u5f62\u5f0f<\/p>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">define<\/span> <span class=\"nv\">foo<\/span> <span class=\"p\">(<\/span><span class=\"k\">lambda<\/span> <span class=\"p\">(<\/span><span class=\"nf\">bar<\/span><span class=\"p\">)<\/span>\n                <span class=\"nv\">&lt;body&gt;<\/span><span class=\"p\">))<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<ul>\n  <li><strong>cond<\/strong><\/li>\n<\/ul>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">cond<\/span> <span class=\"p\">[<\/span><span class=\"nf\">&lt;p1&gt;<\/span> <span class=\"nv\">&lt;e1&gt;<\/span><span class=\"p\">]<\/span>\n      <span class=\"p\">[<\/span><span class=\"nf\">&lt;p2&gt;<\/span> <span class=\"nv\">&lt;e2&gt;<\/span><span class=\"p\">]<\/span>\n      <span class=\"p\">[<\/span><span class=\"k\">else<\/span> <span class=\"nv\">e<\/span>   <span class=\"p\">])<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>cond \u8868\u8fbe\u5f0f\u7c7b\u4f3c\u4e8e\u5e38\u89c1\u7684switch\u7ed3\u6784\uff0c\u4f46\u662f\u6bcf\u4e2acase\u81ea\u5e26break\uff0c\u6240\u4ee5\u65e0\u6cd5\u8fdb\u5165\u591a\u4e2acase\u3002cond \u53ef\u4ee5\u8f6c\u6362\u6210\u5d4c\u5957\u7684if\uff0c\u7136\u540e\u5c06\u8f6c\u6362\u540e\u7684\u8868\u8fbe\u5f0f\u8f6c\u53d1\u7ed9\u89e3\u91ca\u51fd\u6570\u91cd\u65b0\u89e3\u91ca\u3002<\/p>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">if<\/span> <span class=\"nv\">p1<\/span>\n    <span class=\"nv\">e1<\/span>\n    <span class=\"p\">(<\/span><span class=\"k\">if<\/span> <span class=\"nv\">p2<\/span>\n        <span class=\"nv\">e2<\/span>\n        <span class=\"nv\">e<\/span><span class=\"p\">))<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<ul>\n  <li><strong>and<\/strong><\/li>\n<\/ul>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">and<\/span> <span class=\"nv\">c1<\/span> <span class=\"nv\">c2<\/span><span class=\"p\">)<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u77ed\u8def\u7684\u903b\u8f91\u4e0e\u53ef\u4ee5\u7528\u5d4c\u5957\u7684if\u6765\u5b9e\u73b0<\/p>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">if<\/span> <span class=\"nv\">c1<\/span>\n    <span class=\"p\">(<\/span><span class=\"k\">if<\/span> <span class=\"nv\">c2<\/span>\n        <span class=\"nv\">true<\/span><span class=\"p\">)<\/span>\n    <span class=\"nv\">false<\/span><span class=\"p\">)<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<ul>\n  <li><strong>or<\/strong><\/li>\n<\/ul>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">or<\/span> <span class=\"nv\">c1<\/span> <span class=\"nv\">c2<\/span><span class=\"p\">)<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u77ed\u8def\u7684\u903b\u8f91\u6216\u4e5f\u53ef\u4ee5\u7528\u5d4c\u5957\u7684if\u6765\u5b9e\u73b0<\/p>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">if<\/span> <span class=\"nv\">c1<\/span>\n    <span class=\"nv\">true<\/span>\n    <span class=\"p\">(<\/span><span class=\"k\">if<\/span> <span class=\"nv\">c2<\/span>\n        <span class=\"nv\">true<\/span><span class=\"p\">))<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<h2 id=\"letletletrec\">let,let*,letrec<\/h2>\n\n<p>\u8fd9\u4e09\u4e2a\u8bed\u6cd5\u7cd6\u63d0\u4f9b\u4e86\u4e09\u79cd\u4e0d\u540c\u7684\u65b9\u5f0f\u6765\u5b9a\u4e49\u4f5c\u7528\u57df\uff0c\u8fd9\u4e09\u79cd\u8868\u793a\u6cd5\u7684\u4f5c\u7528\u5404\u4e0d\u76f8\u540c\uff0c\u5b83\u4eec\u90fd\u5efa\u7acb\u5728lambda\u7684\u57fa\u7840\u4e0a\u3002<\/p>\n\n<ul>\n  <li><strong>let<\/strong><\/li>\n<\/ul>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">let<\/span> <span class=\"p\">([<\/span><span class=\"nf\">&lt;var1&gt;<\/span> <span class=\"nv\">&lt;exp1&gt;<\/span><span class=\"p\">]<\/span>\n      <span class=\"p\">[<\/span><span class=\"nf\">&lt;var2&gt;<\/span> <span class=\"nv\">&lt;exp2&gt;<\/span><span class=\"p\">])<\/span>\n      <span class=\"nv\">&lt;body&gt;<\/span><span class=\"p\">)<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>let \u8868\u8fbe\u5f0f\u63d0\u4f9b\u4e86\u5b9a\u4e49\u4e00\u4e2a\u4f5c\u7528\u57df\u5e76\u7ed1\u5b9a<strong>\u4e92\u65a5<\/strong>\u53d8\u91cf\u7684\u529f\u80fd\uff0cvar1 \u4e0e var2 \u5728\u8bed\u4e49\u4e0a\u6ca1\u6709\u5148\u540e\u4e4b\u5206\uff0c\u4e5f\u4e0d\u80fd\u76f8\u4e92\u8bbf\u95ee\u3002\nlet \u8868\u8fbe\u5f0f\u7b49\u4ef7\u4e8e\u5982\u4e0b\u5982\u4e0b\u5f62\u5f0f\uff0c\u8fd9\u662f\u4e00\u4e2a\u666e\u901a\u7684\u51fd\u6570\u8c03\u7528\u3002<\/p>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">((<\/span><span class=\"k\">lambda<\/span> <span class=\"p\">(<\/span><span class=\"nf\">&lt;var1&gt;<\/span> <span class=\"nv\">&lt;var2&gt;<\/span><span class=\"p\">)<\/span>\n    <span class=\"nv\">&lt;body&gt;<\/span><span class=\"p\">)<\/span>\n<span class=\"nv\">&lt;exp1&gt;<\/span>\n<span class=\"nv\">&lt;exp2&gt;<\/span><span class=\"p\">)<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<ul>\n  <li><strong>let*<\/strong><\/li>\n<\/ul>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">let*<\/span> <span class=\"p\">([<\/span><span class=\"nf\">&lt;var1&gt;<\/span> <span class=\"nv\">&lt;exp1&gt;<\/span><span class=\"p\">]<\/span>\n       <span class=\"p\">[<\/span><span class=\"nf\">&lt;var2&gt;<\/span> <span class=\"nv\">&lt;exp2&gt;<\/span><span class=\"p\">])<\/span>\n      <span class=\"nv\">&lt;body&gt;<\/span><span class=\"p\">)<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>let* \u8868\u8fbe\u5f0f\u63d0\u4f9b\u4e86\u5b9a\u4e49\u4e00\u4e2a\u4f5c\u7528\u57df\u5e76<strong>\u5148\u540e<\/strong>\u7ed1\u5b9a\u53d8\u91cf\u7684\u529f\u80fd\uff0cvar1 \u4e0e var2 \u5728\u8bed\u4e49\u4e0a\u5b58\u5728\u5148\u540e\u4e4b\u5206\uff0cvar2 \u53ef\u4ee5\u8bbf\u95ee var1\uff0c\u800c var1 \u4e0d\u80fd\u8bbf\u95ee var2\u3002\nlet* \u8868\u8fbe\u5f0f\u7b49\u4ef7\u4e8e\u5982\u4e0b\u5f62\u5f0f<\/p>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">let<\/span> <span class=\"p\">([<\/span><span class=\"nf\">&lt;var1&gt;<\/span> <span class=\"nv\">&lt;exp1&gt;<\/span><span class=\"p\">])<\/span>\n     <span class=\"p\">(<\/span><span class=\"k\">let<\/span> <span class=\"p\">([<\/span><span class=\"nf\">&lt;var2&gt;<\/span> <span class=\"nv\">&lt;exp2&gt;<\/span><span class=\"p\">])<\/span>\n                <span class=\"nv\">&lt;body&gt;<\/span><span class=\"p\">))<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<ul>\n  <li><strong>letrec<\/strong><\/li>\n<\/ul>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">letrec<\/span> <span class=\"p\">([<\/span><span class=\"nf\">&lt;var1&gt;<\/span> <span class=\"nv\">&lt;exp1&gt;<\/span><span class=\"p\">]<\/span>\n         <span class=\"p\">[<\/span><span class=\"nf\">&lt;var2&gt;<\/span> <span class=\"nv\">&lt;exp2&gt;<\/span><span class=\"p\">])<\/span>\n        <span class=\"nv\">&lt;body&gt;<\/span><span class=\"p\">)<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>letrec \u8868\u8fbe\u5f0f\u63d0\u4f9b\u4e86\u5b9a\u4e49\u4e00\u4e2a\u4f5c\u7528\u57df\u5e76<strong>\u540c\u65f6<\/strong>\u7ed1\u5b9a\u53d8\u91cf\u7684\u529f\u80fd\uff0cvar1 \u4e0e var2 \u5728\u8bed\u4e49\u4e0a\u4e3a\u540c\u65f6\u5b9a\u4e49\uff0cvar2 \u53ef\u4ee5\u8bbf\u95ee var1\uff0c\u4e14 var1 \u53ef\u4ee5\u8bbf\u95ee var2\uff0c\nletrec \u7684\u5b58\u5728\u610f\u4e49\u5728\u4e8e\u5c4f\u853d\u5916\u90e8\u540c\u540d\u53d8\u91cf\uff0c\u5047\u5b9a\u5f53\u524d\u4f5c\u7528\u57df\u5916\u90e8\u5b58\u5728\u4e00\u4e2a\u53d8\u91cf <code class=\"language-plaintext highlighter-rouge\">var2<\/code>,\u90a3\u4e48let\u548clet* \u4e2d\u7684var1\u6c42\u503c\u65f6\u5982\u679c\u9700\u8981\u8bbf\u95ee<code class=\"language-plaintext highlighter-rouge\">var2<\/code>\uff0c\u90a3\u4e48\u5c06\u4f1a\u8bbf\u95ee\u8fd9\u4e2a\u5916\u90e8\u7684<code class=\"language-plaintext highlighter-rouge\">var2<\/code>,\n\u800cletrec\u4e0d\u540c\uff0c\u5982\u679cletrec\u7684var1\u6c42\u503c\u662f\u9700\u8981\u8bbf\u95eevar2,\u90a3\u4e48\u8fd9\u4e2avar2\u7684\u503c<strong>\u540c\u4e00\u4f5c\u7528\u57df\u5185<\/strong>\u7684\u90a3\u4e2a<code class=\"language-plaintext highlighter-rouge\">var2<\/code>\u7684\u503c\u3002\nletrec \u8868\u8fbe\u5f0f\u7b49\u4ef7\u4e8e\u5982\u4e0b\u5f62\u5f0f<\/p>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">let<\/span> <span class=\"p\">([<\/span><span class=\"nf\">&lt;var1&gt;<\/span> <span class=\"nv\">**undefined**<\/span><span class=\"p\">]<\/span>\n      <span class=\"p\">[<\/span><span class=\"nf\">&lt;var2&gt;<\/span> <span class=\"nv\">**undefined**<\/span><span class=\"p\">])<\/span>\n      <span class=\"p\">(<\/span><span class=\"k\">set!<\/span> <span class=\"nv\">var1<\/span> <span class=\"nv\">&lt;exp1&gt;<\/span><span class=\"p\">)<\/span>\n      <span class=\"p\">(<\/span><span class=\"k\">set!<\/span> <span class=\"nv\">var2<\/span> <span class=\"nv\">&lt;exp2&gt;<\/span>\n      <span class=\"nv\">&lt;body&gt;<\/span><span class=\"p\">)<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u89e3\u91ca\u5668\u5728\u5bf9\u53d8\u91cf\u6c42\u503c\u65f6\u4f1a\u68c0\u67e5\u53d8\u91cf\u7684\u503c\uff0c\u5982\u679c\u5176\u503c\u4e3a\u4e00\u4e2a\u672a\u5b9a\u4e49\u6807\u8bb0\uff0c\u5219\u4f1a\u63d0\u793a\u672a\u5b9a\u4e49\u9519\u8bef\u3002<\/p>\n\n<h1 id=\"\u5185\u90e8\u5b9a\u4e49\">\u5185\u90e8\u5b9a\u4e49<\/h1>\n\n<p>\u51fd\u6570\u7684\u5185\u90e8\u53ef\u4ee5\u5d4c\u5957\u5730\u4f7f\u7528define\u8bed\u53e5\uff0c\u4f46\u662fdefine\u5728\u5199\u6210\u6587\u672c\u65f6\u662f\u5b58\u5728\u5148\u540e\u7684\uff0c\u4f46\u662f\u51fd\u6570\u5185\u90e8\u5b9a\u4e49\u7684\u8bed\u4e49\u5e94\u5f53\u662f\u540c\u65f6\u5b9a\u4e49\uff0c\u6240\u4ee5\u5728\u5bf9lambda\u8fdb\u884c\u89e3\u91ca\u65f6\u9700\u8981\u4e00\u4e9b\u8c03\u6574\uff0c\n\u8c03\u6574\u5185\u5bb9\u5982\u4e0b\uff0c<\/p>\n<ul>\n  <li>\u626b\u63cf\u51falambda\u4f53\u5185\u7684\u6240\u6709define\u8bed\u53e5\uff0c\u53ea\u626b\u63cf\u5185\u90e8\u5b9a\u4e49\u7684\u7b2c\u4e00\u5c42\u65e0\u9700\u5d4c\u5957\uff0c\u7136\u540e\u5c06define\u7684\u53d8\u91cf\u540d\u548c\u503c\u8868\u8fbe\u5f0f(\u65e0\u9700\u6c42\u503c)\u88c5\u914d\u6210<code class=\"language-plaintext highlighter-rouge\">letrec<\/code>\u7684kv\u7ed1\u5b9a\u5f62\u5f0f\uff1b<\/li>\n  <li>\u626b\u63cf\u51falambda\u5185\u90e8\u7684\u6240\u6709\u975e\u5b9a\u4e49\u8bed\u53e5\u5c06\u8fd9\u4e2a\u5e8f\u5217\u4f5c\u4e3a<code class=\"language-plaintext highlighter-rouge\">letrec<\/code>\u7684<code class=\"language-plaintext highlighter-rouge\">body<\/code>\uff1b<\/li>\n  <li>\u7528\u4e0a\u9762\u5f97\u5230\u7684\u4e24\u4e2a\u90e8\u5206\u7ec4\u6210\u4e00\u4e2a<code class=\"language-plaintext highlighter-rouge\">letrec<\/code>\uff1b<\/li>\n  <li>\u7528\u65b0\u5f97\u5230\u7684letrec\u4f5c\u4e3abody\u6784\u9020\u4e00\u4e2a\u65b0\u7684 lambda \u6765\u66ff\u6362\u539f\u6765\u7684lambda\u3002<\/li>\n<\/ul>\n\n<p>\u4e0a\u6587\u63cf\u8ff0\u7684\u542b\u4e49\u4e3a\uff1a<\/p>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">lambda<\/span> <span class=\"p\">(<\/span><span class=\"nf\">foo<\/span><span class=\"p\">)<\/span>\n        <span class=\"p\">(<\/span><span class=\"k\">define<\/span> <span class=\"nv\">a<\/span> <span class=\"nv\">&lt;expa&gt;<\/span><span class=\"p\">)<\/span>\n        <span class=\"p\">(<\/span><span class=\"k\">define<\/span> <span class=\"nv\">b<\/span> <span class=\"nv\">&lt;expb&gt;<\/span><span class=\"p\">)<\/span>\n        <span class=\"nv\">&lt;body&gt;<\/span><span class=\"p\">)<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u7b49\u4ef7\u4e8e\u5982\u4e0b\u5f62\u5f0f<\/p>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">lambda<\/span> <span class=\"p\">(<\/span><span class=\"nf\">foo<\/span><span class=\"p\">)<\/span>\n    <span class=\"p\">(<\/span><span class=\"k\">letrec<\/span> <span class=\"p\">([<\/span><span class=\"nf\">a<\/span> <span class=\"nv\">&lt;expa&gt;<\/span><span class=\"p\">]<\/span>\n             <span class=\"p\">[<\/span><span class=\"nf\">b<\/span> <span class=\"nv\">&lt;expb&gt;<\/span><span class=\"p\">])<\/span>\n        <span class=\"nv\">&lt;body&gt;<\/span><span class=\"p\">))<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<h1 id=\"\u60f0\u6027\u6c42\u503c\">\u60f0\u6027\u6c42\u503c<\/h1>\n\n<p>\u4e3a\u4e86\u5b9e\u73b0\u60f0\u6027\u6c42\u503c\uff0c\u9700\u8981\u63d0\u4f9b\u4e00\u79cd\u5ef6\u8fdf\u8ba1\u7b97\u4e00\u4e2a\u8868\u8fbe\u5f0f\u7684\u80fd\u529b\uff0c\u5b9e\u73b0\u65b9\u5f0f\u6709\u4e24\u79cd\uff0c\u4e00\u79cd\u662f\u5c06\u89e3\u91ca\u5668\u6539\u9020\u6210\u60f0\u6027\u6c42\u503c\u89e3\u91ca\u5668\uff0c\n\u53e6\u4e00\u79cd\u662f\u7528\u4e00\u5bf9\u5173\u952e\u5b57 <code class=\"language-plaintext highlighter-rouge\">delay<\/code> <code class=\"language-plaintext highlighter-rouge\">force<\/code> \u63d0\u4f9b\u5c40\u90e8\u7684\u60f0\u6027\u548c\u5f3a\u5236\u6c42\u503c\u80fd\u529b\u3002<\/p>\n\n<ul>\n  <li><strong>\u60f0\u6027\u6c42\u503c\u89e3\u91ca\u5668<\/strong><\/li>\n<\/ul>\n\n<p>\u5bf9\u4efb\u4f55\u4e00\u4e2a\u8868\u8fbe\u5f0f\u6c42\u503c\u65f6\uff0c\u90fd\u4e0d\u76f4\u63a5\u6c42\u503c\u8868\u8fbe\u5f0f\u800c\u662f\u521b\u5efa\u4e00\u4e2a\u4ee3\u7406\u7684\u6570\u636e\u7ed3\u6784\u6765\u5305\u88f9\u8868\u8fbe\u5f0f\u548c\u6c42\u503c\u65f6\u7684\u73af\u5883\uff0c\u8fd9\u4e2a\u4ee3\u7406\u53ef\u4ee5\u4f5c\u4e3a\u8be5\u8868\u8fbe\u5f0f\u503c\u7684\u8bb8\u8bfa\u8fdb\u884c\u4f20\u9012\u3002\n\u5f53\u9700\u8981\u4f7f\u7528\u8868\u8fbe\u5f0f\u7684\u503c\u65f6\uff0c\u518d\u5bf9\u8fd9\u4e2a\u4ee3\u7406\u8fdb\u6c42\u503c\uff0c\u89e3\u91ca\u5668\u5e76\u4e0d\u4f1a\u5b8c\u6574\u5730\u6c42\u51fa\u6574\u4e2a\u8868\u8fbe\u5f0f\u7684\u503c\uff0c\u5176\u5b9e\u8fd9\u4e2a\u503c\u4f9d\u65e7\u662f\u4e00\u4e2a\u4ee3\u7406\uff0c\u89e3\u91ca\u5668\u5f88\u61d2\uff0c\u6700\u591a\u53ea\u5de5\u4f5c\u5230\u521a\u521a\u6ee1\u8db3\u9700\u6c42\u7684\u7a0b\u5ea6\u3002<\/p>\n\n<p>\u7406\u8bba\u4e0a\u6765\u8bb2\uff0c\u60f0\u6027\u6c42\u503c\u7684\u6548\u7387\u5e94\u5f53\u9ad8\u8fc7\u666e\u901a\u7684\u6c42\u503c\u5668\uff0c\u4f46\u662f\u5b83\u6709\u4e2a\u7f3a\u9677\uff0c\u60f0\u6027\u6c42\u503c\u4e0e\u8d4b\u503c\u8bed\u53e5\u914d\u5408\u4f7f\u7528\u65f6\u7ecf\u5e38\u4f1a\u51fa\u73b0\u610f\u6599\u4e4b\u5916\u7684\u60c5\u51b5\uff0c\u56e0\u6b64 <code class=\"language-plaintext highlighter-rouge\">haskell<\/code> \u8fd9\u79cd\u60f0\u6027\u6c42\u503c\u7684\u8bed\u8a00\u540c\u65f6\u4e5f\u662f\u7eaf\u51fd\u6570\u5f0f\u7684\u8bed\u8a00\u3002<\/p>\n\n<p>\u56e0\u4e3a\u8d4b\u503c\u4ea7\u751f\u95ee\u9898\u4f8b\u5b50\u5982\u4e0b\uff0c\u5176\u51fd\u6570\u7684\u8fd4\u56de\u503c\u5e76\u4e0d\u4f1a\u53d1\u751f\u4efb\u4f55\u53d8\u5316\uff0c\u56e0\u4e3a\u8d4b\u503c\u8868\u8fbe\u5f0f\u88ab\u60f0\u6027\u4e86\uff0c\u5e76\u6ca1\u6709\u771f\u6b63\u6267\u884c\u3002\n\u8981\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u5fc5\u987b\u63d0\u4f9b\u4e00\u4e2a\u673a\u5236\u8ba9\u8bed\u8a00\u4f7f\u7528\u8005\u4e3b\u52a8\u5730\u5f3a\u5236\u6267\u884c\u8be5\u8868\u8fbe\u5f0f\u3002<\/p>\n\n<div class=\"language-scheme highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"p\">(<\/span><span class=\"k\">define<\/span> <span class=\"p\">(<\/span><span class=\"nf\">f<\/span> <span class=\"nv\">x<\/span><span class=\"p\">)<\/span>\n  <span class=\"p\">(<\/span><span class=\"k\">set!<\/span> <span class=\"nv\">x<\/span> <span class=\"mi\">998<\/span><span class=\"p\">)<\/span>\n  <span class=\"nv\">x<\/span><span class=\"p\">)<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<ul>\n  <li><strong>delay\/force<\/strong><\/li>\n<\/ul>\n\n<p>\u7528\u8fd9\u79cd\u65b9\u5f0f\u63d0\u4f9b\u60f0\u6027\u529f\u80fd\u5e76\u6ca1\u4ec0\u4e48\u7406\u8bba\u4e0a\u7684\u53d8\u5316\uff0c\u53ea\u662f\u8ba9\u666e\u901a\u7684\u89e3\u91ca\u5668\u589e\u52a0\u4e24\u4e2acase, \u5728\u78b0\u5230delay\u65f6\u751f\u6210\u4ee3\u7406\uff0c\u78b0\u5230force\u65f6\u5f3a\u5236\u6267\u884c\u3002\u5176\u4f18\u70b9\u662f\u7b80\u5355\u6613\u7528\uff0c\u540c\u65f6\u7f3a\u70b9\u4e5f\u975e\u5e38\u660e\u663e\uff0c\n\u5fc5\u987b\u4e3a\u9ad8\u9636\u51fd\u6570\u63d0\u4f9b\u4e24\u4e2a\u7248\u672c\uff0c\u4e00\u4e2a\u7248\u672c\u666e\u901a\uff0c\u4e00\u4e2a\u7248\u672c\u60f0\u6027\uff0c\u800c\u4e14\u5728\u4f7f\u7528\u60f0\u6027\u529f\u80fd\u65f6\uff0c\u4ee3\u7801\u4e2d\u4f1a\u904d\u5e03\u8fd9\u4e24\u4e2a\u5173\u952e\u5b57\u3002<\/p>\n\n<p>\u5728\u6211\u5199\u7684\u89e3\u91ca\u5668\u4e2d\u7528<strong>delay\/force<\/strong>\u7684\u65b9\u5f0f\u63d0\u4f9b\u4e86\u60f0\u6027\u6c42\u503c\u7684\u529f\u80fd\u3002<\/p>\n\n<h1 id=\"\u5c3e\u8c03\u7528\u4f18\u5316\">\u5c3e\u8c03\u7528\u4f18\u5316<\/h1>\n\n<p>scheme\u8bed\u8a00\u6ca1\u6709\u5faa\u73af\uff0c\u5faa\u73af\u7684\u672c\u8d28\u5c31\u662f\u5728\u9012\u5f52\u65f6\u4e0d\u65ad\u5bf9\u4e00\u4e2a\u53d8\u91cf\u8fdb\u884c\u8bfb\u5199\uff0c\u8fd9\u4e2a\u53d8\u91cf\u4f5c\u4e3a\u7ec8\u6b62\u6761\u4ef6\u4fbf\u53ef\u4ee5\u63a7\u5236\u9012\u5f52\u7684\u6b21\u6570\uff0c\u5728\u6ca1\u6709\u5faa\u73af\u65f6\uff0c\u53ef\u4ee5\u7528\u5728\u9012\u5f52\u51fd\u6570\u4e2d\u4f20\u9012\u8fd9\u4e2a\u53d8\u5316\u7684\u56e0\u5b50\u6765\u4ee3\u66ff\u3002\n\u8fd9\u79cd\u9012\u5f52\u6bd4\u8f83\u7279\u6b8a\uff0c\u5b83\u5728\u6808\u4e2d\u53ea\u5360\u4e00\u5e27\uff0c\u5e76\u4e0d\u4f1a\u5728\u6808\u7a7a\u95f4\u7d2f\u79ef\u6570\u636e\uff0c\u8981\u4f7f\u9012\u5f52\u80fd\u591f\u4ee3\u66ff\u5faa\u73af\uff0c\u5fc5\u987b\u8fdb\u884c\u5c3e\u8c03\u7528\u4f18\u5316\u3002<\/p>\n\n<p>\u56e0\u4e3a\u6211\u7684\u89e3\u91ca\u5668\u662f\u81ea\u4e3e\u7684\uff0cscheme\u8bed\u8a00\u672c\u8eab\u63d0\u4f9b\u4e86\u5bf9\u5c3e\u8c03\u7528\u7684\u4f18\u5316\uff0c\u5728\u5bf9\u9012\u5f52\u7684\u51fd\u6570\u8fdb\u884c\u89e3\u91ca\u65f6\uff0c\u4fdd\u5b58\u5f53\u524d\u4e00\u5e27\u4e2d\u7684\u91cd\u8981\u6570\u636e\u7684\u8d1f\u62c5\u88ab\u8f6c\u5ac1\u5230\u4e86\u89e3\u91ca\u5668\u4e2d\uff0c\n\u5982\u679c\u7f16\u5199\u89e3\u91ca\u5668\u7684\u8bed\u8a00\u6070\u597d\u4e5f\u652f\u6301\u5c3e\u8c03\u7528\u4f18\u5316\uff0c\u8fd9\u4e00\u8d1f\u62c5\u4f1a\u6d88\u5f2d\u4e8e\u65e0\u5f62\u3002\u4f46\u662f\u5982\u679c\u7f16\u5199\u89e3\u91ca\u5668\u7684\u8bed\u8a00\u6ca1\u6709\u5c3e\u8c03\u7528\u4f18\u5316\u5462\uff1f\u90a3\u6211\u4eec\u5c31\u9700\u8981\u81ea\u5df1\u5904\u7406\u8fd9\u79cd\u4f18\u5316\u3002<\/p>\n\n<p>\u5904\u7406\u5c3e\u8c03\u7528\u4f18\u5316\u6bd4\u8f83\u590d\u6742\uff0c\u9700\u8981\u5c06\u89e3\u91ca\u5668\u5199\u6210\u5bc4\u5b58\u5668\u98ce\u683c\uff0c\u7528\u6808\u6765\u4fdd\u5b58\u5bc4\u5b58\u5668\u4e2d\u7684\u5386\u53f2\u503c\u3002\n\u5728\u89e3\u91ca\u4e00\u4e2a\u8868\u8fbe\u5f0f\u524d\uff0c\u5c06\u5bc4\u5b58\u5668\u503c\u5165\u6808\uff0c\u89e3\u91ca\u4e00\u4e2a\u8868\u8fbe\u5f0f\u540e\uff0c\u6808\u4e2d\u5185\u5bb9\u5f39\u51fa\u5230\u5bc4\u5b58\u5668\u4e2d\uff0c\u89e3\u91ca\u4e00\u4e2a\u8868\u8fbe\u5f0f\u7684\u503c\u4e0d\u4f1a\u5728\u6808\u4e2d\u7559\u4e0b\u4efb\u4f55\u6570\u636e\u3002\n\u5982\u679c\u8868\u8fbe\u5f0f\u4e2d\u5b58\u5728\u5b50\u8868\u8fbe\u5f0f\uff0c\u90a3\u4e48\u8fd9\u4e2a\u8fc7\u7a0b\u4e5f\u9002\u7528\u4e8e\u5b50\u8868\u8fbe\u5f0f\uff0c\u663e\u800c\u6613\u89c1\uff0c\u5b50\u8868\u8fbe\u5f0f\u89e3\u91ca\u524d\u7684\u6570\u636e\u5165\u6808\u65f6\u5c06\u538b\u5728\u7236\u8868\u8fbe\u5f0f\u7684\u6570\u636e\u4e4b\u4e0a\u3002\n\u5982\u679c\u5b50\u8868\u793a\u7684\u5d4c\u5957\u5c42\u6570\u592a\u6df1\uff0c\u6570\u636e\u5c06\u6709\u53ef\u80fd\u6491\u6ee1\u6574\u4e2a\u6808\uff0c\u9012\u5f52\u51fd\u6570\u901a\u5e38\u6781\u6709\u53ef\u80fd\u5d4c\u5957\u592a\u6df1\u3002<\/p>\n\n<p>\u57fa\u4e8e\u8fd9\u79cd\u89e3\u91ca\u5668\u6a21\u578b\uff0c\u53ef\u4ee5\u9009\u62e9\u8ba9\u8868\u8fbe\u5f0f\u5e8f\u5217\u4e2d\u7684\u6700\u540e\u4e00\u6761\u8bed\u53e5\u5728\u89e3\u91ca\u4e4b\u524d\u6570\u636e\u4e0d\u5165\u6808\uff0c\u8fd9\u6700\u540e\u4e00\u6761\u8bed\u53e5\u6267\u884c\u5b8c\u6bd5\u540e\uff0c\u76f4\u63a5\u4fee\u6539\u5bc4\u5b58\u5668\uff0c\u6570\u636e\u4e5f\u4e0d\u5fc5\u51fa\u6808\u3002\n\u5982\u679c\u6700\u540e\u4e00\u6761\u8bed\u53e5\u4ec5\u4ec5\u4e3a\u4e00\u4e2a\u51fd\u6570\u8c03\u7528\uff0c\u90a3\u4e48\u8fd9\u4e2a\u8bed\u53e5\u5c06\u4e0d\u4f1a\u5728\u6808\u4e2d\u7d2f\u79ef\u6570\u636e\uff0c\u5373\u4f7f\u8fd9\u4e2a\u51fd\u6570\u662f\u9012\u5f52\u7684\u4e5f\u540c\u6837\u5982\u6b64\u3002<\/p>\n\n<h1 id=\"\u5783\u573e\u56de\u6536\">\u5783\u573e\u56de\u6536<\/h1>\n\n<p>\u5783\u573e\u56de\u6536\u7684\u76ee\u6807\u662f\u51fd\u6570\u6267\u884c\u65f6\u6269\u5c55\u7684\u4f5c\u7528\u57df\u4ee5\u53ca\u51fd\u6570\u7684\u95ed\u5305\uff0c\u5224\u522b\u4e00\u6bb5\u5185\u5b58\u662f\u5426\u53ef\u56de\u6536\u7684\u65b9\u5f0f\u662f\u679a\u4e3e\u6839\u8282\u70b9\u3002\n\u4ece\u5bc4\u5b58\u5668\u4e2d\u7684\u6307\u9488\u51fa\u53d1\uff0c\u7ecf\u8fc7\u4e00\u7cfb\u5217car,cdr\u80fd\u8fbe\u5230\u7684\u5bf9\u8c61\uff0c\u6709\u53ef\u80fd\u5f71\u54cd\u672a\u6765\u7684\u8ba1\u7b97\u8fc7\u7a0b\uff0c\u90a3\u4e9b\u4e0d\u80fd\u8fbe\u5230\u7684\u90fd\u662f\u53ef\u56de\u6536\u7684\u5783\u573e\u3002<\/p>\n\n<p>\u5982\u679c\u91c7\u7528<strong>\u505c\u6b62\u5e76\u590d\u5236<\/strong>\u7684\u7b97\u6cd5\u8fdb\u884c\u56de\u6536\uff0c\u5176\u6d41\u7a0b\u5927\u81f4\u5982\u4e0b\uff1a<\/p>\n\n<ul>\n  <li>\n    <p>GC\u5f00\u59cb\u4e4b\u524d\uff0c\u5c06\u6240\u6709\u5bc4\u5b58\u5668\u5185\u5bb9\u4fdd\u5b58\u5230\u4e00\u4e2a\u9884\u5148\u5206\u914d\u597d\u7684\u8868\u91cc\uff0c\u5e76\u8ba9root\u5bc4\u5b58\u5668\u6307\u5411\u8fd9\u4e2a\u8868\u7684\u9876\u90e8\u5e8f\u5bf9\u3002<\/p>\n  <\/li>\n  <li>\n    <p>GC\u65f6\uff0c\u5148\u4eceroot\u8868\u5f00\u59cb\uff0c\u4e00\u4e2a\u4e00\u4e2a\u5730\u590d\u5236\u5e8f\u5bf9\uff0c\u539f\u5185\u5b58\u4e2d\u88ab\u590d\u5236\u7684\u5e8f\u5bf9\uff0ccar\u6807\u8bb0\u4e3a\u201c\u7834\u788e\u7684\u5fc3\u201d\uff0ccdr\u653e\u7f6e\u4e00\u4e2a\u524d\u5411\u6307\u9488\uff0c\u6307\u5411\u5e8f\u5bf9\u590d\u5236\u540e\u7684\u65b0\u4f4d\u7f6e\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u72b6\u6001\u63a7\u5236\uff0cfree\uff0cscan\u3002\nfree \u6307\u5411\u4e0b\u4e00\u6bb5\u53ef\u7528\u5185\u5b58\uff0c\u5185\u5b58\u5206\u914d\u65f6\u9012\u589e\u7684\u5730\u5740\u5c31\u662f\u901a\u8fc7\u5b83\u6765\u5b9e\u73b0\uff0c\u901a\u8fc7\u4ed6\u53ef\u4ee5\u77e5\u9053\u5f53\u524d\u5185\u5b58\u7684\u4f7f\u7528\u72b6\u6001\u3002<\/p>\n  <\/li>\n  <li>\n    <p>GC\u5faa\u73af\uff0cscan\u521d\u59cb\u6307\u5411\u4e00\u4e2a\u65b0\u5185\u5b58\u533a\u7684\u5bf9\u8c61A\uff0c\u800c\u8be5\u5bf9\u8c61car,cdr\u4ecd\u6307\u5411\u65e7\u5185\u5b58\u533a\u7684\u5bf9\u8c61\uff0c\u5047\u5b9ascan\u6b63\u5728\u626b\u63cfA\u5bf9\u8c61\u7684car\uff0c\u6b64\u65f6\u9700\u8981\u68c0\u67e5car\u6307\u5411\u7684\u5bf9\u8c61\u662f\u5426\u5df2\u88ab\u590d\u5236\u3002\n\u5982\u679c\u672a\u590d\u5236\u5c31\u5c06\u5176\u590d\u5236\u5230free\u6240\u6307\u7684\u4f4d\u7f6e\u5e76\u66f4\u65b0free\uff0c\u540c\u65f6\u5728\u65e7\u5bf9\u8c61\u505a\u6807\u8bb0\uff0c\u7136\u540e\u66f4\u65b0car\u4f7f\u5176\u6307\u5411\u590d\u5236\u540e\u7684\u5bf9\u8c61\u3002\u5982\u679ccar\u6307\u5411\u7684\u5bf9\u8c61\u5df2\u88ab\u590d\u5236\uff0c\u5219car\u66f4\u65b0\u4e3a\u5c06\u8be5\u65e7\u5bf9\u8c61\u7684cdr\u4e2d\u7684\u524d\u5411\u6307\u9488\u3002\n\u5f53scan\u8d85\u8fc7free\u65f6GC\u7ed3\u675f\u3002<\/p>\n  <\/li>\n<\/ul>\n\n","pubDate":"Mon, 21 Jul 2014 00:00:00 +0000","link":"https:\/\/bit-ranger.github.io\/blog\/lisp\/the-scheme-eval\/","guid":"https:\/\/bit-ranger.github.io\/blog\/lisp\/the-scheme-eval\/","category":["lisp","scheme","eval","lisp"]},{"title":"\u8bbe\u8ba1\u6a21\u5f0f\u4e0e\u539f\u5219","description":"<p>\u8bbe\u8ba1\u6a21\u5f0f\u7684\u5b9a\u4e49\uff1a\u5728\u67d0\u60c5\u5883\u4e0b\uff0c\u9488\u5bf9\u67d0\u95ee\u9898\u7684\u67d0\u79cd\u89e3\u51b3\u65b9\u6848\u3002\u4f46\u662f\u6ee1\u8db3\u6b64\u5b9a\u4e49\u7684\u65b9\u6848\u5e76\u4e0d\u4e00\u5b9a\u662f\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u8bbe\u8ba1\u6a21\u5f0f\u8981\u6c42\u89e3\u51b3\u65b9\u6848\u5fc5\u987b\u662f\u53ef\u590d\u7528\u7684\u3002\n\u8bbe\u8ba1\u6a21\u5f0f\u7684\u4f5c\u7528\u5927\u4f53\u4e0a\u662f\uff1a\u4f18\u5316\u7ed3\u6784\uff0c\u6d88\u9664\u4f9d\u8d56\uff0c\u5c06\u9762\u5411\u8fc7\u7a0b\u8f6c\u4e3a\u9762\u5411\u5bf9\u8c61\u3002\u6309\u7167\u529f\u80fd\uff0c\u4e00\u822c\u53ef\u4ee5\u5c06\u8bbe\u8ba1\u6a21\u5f0f\u5206\u4e3a<code class=\"language-plaintext highlighter-rouge\">\u521b\u5efa\u578b<\/code>\uff0c<code class=\"language-plaintext highlighter-rouge\">\u884c\u4e3a\u578b<\/code>\uff0c<code class=\"language-plaintext highlighter-rouge\">\u7ed3\u6784\u578b<\/code>\u4e09\u5927\u7c7b\u3002\n\u672c\u6587\u5c06\u5217\u4e3e\u8fd9\u4e9b\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5e76\u5bf9\u6bcf\u4e2a\u8bbe\u8ba1\u6a21\u5f0f\u8fdb\u884c\u7b80\u8981\u63cf\u8ff0\uff0c\u63cf\u8ff0\u683c\u5f0f\u4e3a\uff1a\u540d\u79f0\uff0c\u5b9a\u4e49\uff0c\u6848\u4f8b\uff0c\u9002\u7528\u6027\uff0c\u7ed3\u6784\uff0c\u6548\u679c\uff0c\u5e94\u7528\uff0c\u76f8\u5173\u3002<\/p>\n\n<ul id=\"markdown-toc\">\n  <li><a href=\"#\u521b\u5efa\u578b\" id=\"markdown-toc-\u521b\u5efa\u578b\">\u521b\u5efa\u578b<\/a>    <ul>\n      <li><a href=\"#\u5355\u4f8b\u6a21\u5f0f\" id=\"markdown-toc-\u5355\u4f8b\u6a21\u5f0f\">\u5355\u4f8b\u6a21\u5f0f<\/a><\/li>\n      <li><a href=\"#\u5de5\u5382\u6a21\u5f0f\" id=\"markdown-toc-\u5de5\u5382\u6a21\u5f0f\">\u5de5\u5382\u6a21\u5f0f<\/a><\/li>\n    <\/ul>\n  <\/li>\n  <li><a href=\"#\u884c\u4e3a\u578b\" id=\"markdown-toc-\u884c\u4e3a\u578b\">\u884c\u4e3a\u578b<\/a>    <ul>\n      <li><a href=\"#\u7b56\u7565\u6a21\u5f0f\" id=\"markdown-toc-\u7b56\u7565\u6a21\u5f0f\">\u7b56\u7565\u6a21\u5f0f<\/a><\/li>\n      <li><a href=\"#\u6a21\u677f\u65b9\u6cd5\" id=\"markdown-toc-\u6a21\u677f\u65b9\u6cd5\">\u6a21\u677f\u65b9\u6cd5<\/a><\/li>\n      <li><a href=\"#\u72b6\u6001\u6a21\u5f0f\" id=\"markdown-toc-\u72b6\u6001\u6a21\u5f0f\">\u72b6\u6001\u6a21\u5f0f<\/a><\/li>\n      <li><a href=\"#\u547d\u4ee4\u6a21\u5f0f\" id=\"markdown-toc-\u547d\u4ee4\u6a21\u5f0f\">\u547d\u4ee4\u6a21\u5f0f<\/a><\/li>\n      <li><a href=\"#\u89c2\u5bdf\u8005\u6a21\u5f0f\" id=\"markdown-toc-\u89c2\u5bdf\u8005\u6a21\u5f0f\">\u89c2\u5bdf\u8005\u6a21\u5f0f<\/a><\/li>\n      <li><a href=\"#\u8fed\u4ee3\u5668\u6a21\u5f0f\" id=\"markdown-toc-\u8fed\u4ee3\u5668\u6a21\u5f0f\">\u8fed\u4ee3\u5668\u6a21\u5f0f<\/a><\/li>\n    <\/ul>\n  <\/li>\n  <li><a href=\"#\u7ed3\u6784\u578b\" id=\"markdown-toc-\u7ed3\u6784\u578b\">\u7ed3\u6784\u578b<\/a>    <ul>\n      <li><a href=\"#\u88c5\u9970\u8005\u6a21\u5f0f\" id=\"markdown-toc-\u88c5\u9970\u8005\u6a21\u5f0f\">\u88c5\u9970\u8005\u6a21\u5f0f<\/a><\/li>\n      <li><a href=\"#\u9002\u914d\u5668\u6a21\u5f0f\" id=\"markdown-toc-\u9002\u914d\u5668\u6a21\u5f0f\">\u9002\u914d\u5668\u6a21\u5f0f<\/a><\/li>\n      <li><a href=\"#\u4ee3\u7406\u6a21\u5f0f\" id=\"markdown-toc-\u4ee3\u7406\u6a21\u5f0f\">\u4ee3\u7406\u6a21\u5f0f<\/a><\/li>\n      <li><a href=\"#\u5916\u89c2\u6a21\u5f0f\" id=\"markdown-toc-\u5916\u89c2\u6a21\u5f0f\">\u5916\u89c2\u6a21\u5f0f<\/a><\/li>\n      <li><a href=\"#\u7ec4\u5408\u6a21\u5f0f\" id=\"markdown-toc-\u7ec4\u5408\u6a21\u5f0f\">\u7ec4\u5408\u6a21\u5f0f<\/a><\/li>\n    <\/ul>\n  <\/li>\n<\/ul>\n\n<p>\u8bbe\u8ba1\u6a21\u5f0f\u662f\u5de5\u7a0b\u5e08\u4eec\u4ece\u5de5\u4f5c\u4e2d\u603b\u7ed3\u51fa\u6765\u7684\u7ecf\u9a8c\u4e4b\u8c08\uff0c\u8fd9\u4e9b\u7ecf\u9a8c\u9664\u4e86\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u8fd8\u6709\u4e00\u4e9b\u8bbe\u8ba1\u539f\u5219\uff0c\u4e25\u683c\u6765\u8bb2\uff0c\u8fd9\u4e9b\u4e1c\u897f\u90fd\u662f\u6559\u6761\uff0c\u5b83\u544a\u8bc9\u6211\u4eec\u53ea\u8981\u6309\u7167\u89c4\u77e9\u6765\uff0c\u5c31\u4e0d\u5bb9\u6613\u72af\u9519\u3002\u5f53\u9047\u5230\u4e00\u7279\u6b8a\u60c5\u51b5\u65f6\uff0c\u6253\u7834\u539f\u5219\u4e5f\u6ca1\u4ec0\u4e48\u5927\u4e0d\u4e86\u7684\u3002<\/p>\n\n<p>\u8fd9\u4e9b\u539f\u5219\u5305\u62ec\uff1a<\/p>\n\n<blockquote>\n  <p>\u5355\u4e00\u8d23\u4efb\u539f\u5219\uff1a\u4e00\u4e2a\u7c7b\u5e94\u8be5\u53ea\u6709\u4e00\u4e2a\u5f15\u8d77\u53d8\u5316\u7684\u539f\u56e0\u3002<\/p>\n<\/blockquote>\n\n<blockquote>\n  <p>\u91cc\u6c0f\u66ff\u6362\u539f\u5219\uff1a\u5b50\u7c7b\u53ef\u4ee5\u6269\u5c55\u7236\u7c7b\u7684\u529f\u80fd\uff0c\u4f46\u4e0d\u80fd\u6539\u53d8\u7236\u7c7b\u539f\u6709\u7684\u529f\u80fd\u3002<\/p>\n<\/blockquote>\n\n<blockquote>\n  <p>\u4f9d\u8d56\u5012\u7f6e\u539f\u5219\uff1a\u9ad8\u5c42\u6a21\u5757\u4e0d\u5e94\u8be5\u4f9d\u8d56\u4f4e\u5c42\u6a21\u5757\uff0c\u4e8c\u8005\u90fd\u5e94\u8be5\u4f9d\u8d56\u5176\u62bd\u8c61\uff1b\u62bd\u8c61\u4e0d\u5e94\u8be5\u4f9d\u8d56\u7ec6\u8282\uff1b\u7ec6\u8282\u5e94\u8be5\u4f9d\u8d56\u62bd\u8c61\u3002<\/p>\n<\/blockquote>\n\n<blockquote>\n  <p>\u63a5\u53e3\u9694\u79bb\u539f\u5219\uff1a\u5ba2\u6237\u7aef\u4e0d\u5e94\u8be5\u4f9d\u8d56\u5b83\u4e0d\u9700\u8981\u7684\u63a5\u53e3\uff1b\u4e00\u4e2a\u7c7b\u5bf9\u53e6\u4e00\u4e2a\u7c7b\u7684\u4f9d\u8d56\u5e94\u8be5\u5efa\u7acb\u5728\u6700\u5c0f\u7684\u63a5\u53e3\u4e0a\u3002<\/p>\n<\/blockquote>\n\n<blockquote>\n  <p>\u6700\u5c11\u77e5\u8bc6\u539f\u5219\uff1a\u4e00\u4e2a\u5bf9\u8c61\u5e94\u8be5\u5bf9\u5176\u4ed6\u5bf9\u8c61\u4fdd\u6301\u6700\u5c11\u7684\u4e86\u89e3\u3002<\/p>\n<\/blockquote>\n\n<blockquote>\n  <p>\u5f00\u95ed\u539f\u5219\uff1a\u4e00\u4e2a\u8f6f\u4ef6\u5b9e\u4f53\u5982\u7c7b\u3001\u6a21\u5757\u548c\u51fd\u6570\u5e94\u8be5\u5bf9\u6269\u5c55\u5f00\u653e\uff0c\u5bf9\u4fee\u6539\u5173\u95ed\u3002<\/p>\n<\/blockquote>\n\n<p>\u4ee5\u53ca\u4e00\u4e9b\u53eb\u4e0d\u4e0a\u540d\u7684\u539f\u5219\uff1a<\/p>\n\n<blockquote>\n  <p>\u627e\u51fa\u5e94\u7528\u4e2d\u53ef\u80fd\u9700\u8981\u53d8\u5316\u4e4b\u5904\uff0c\u628a\u4ed6\u4eec\u72ec\u7acb\u51fa\u6765\uff0c\u4e0d\u8981\u548c\u90a3\u4e9b\u4e0d\u9700\u8981\u53d8\u5316\u7684\u4ee3\u7801\u6df7\u5728\u4e00\u8d77\u3002<\/p>\n<\/blockquote>\n\n<blockquote>\n  <p>\u9488\u5bf9\u63a5\u53e3\u7f16\u7a0b\uff0c\u800c\u4e0d\u662f\u9488\u5bf9\u5b9e\u73b0\u7f16\u7a0b\u3002<\/p>\n<\/blockquote>\n\n<blockquote>\n  <p>\u591a\u7528\u7ec4\u5408\u5c11\u7528\u7ee7\u627f\u3002<\/p>\n<\/blockquote>\n\n<h1 id=\"\u521b\u5efa\u578b\">\u521b\u5efa\u578b<\/h1>\n\n<h2 id=\"\u5355\u4f8b\u6a21\u5f0f\">\u5355\u4f8b\u6a21\u5f0f<\/h2>\n\n<p><strong>\u5b9a\u4e49<\/strong><\/p>\n\n<p>\u786e\u4fdd\u4e00\u4e2a\u7c7b\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u5e76\u63d0\u4f9b\u4e00\u4e2a\u5168\u5c40\u8bbf\u95ee\u70b9\u3002<\/p>\n\n<p><strong>\u6848\u4f8b<\/strong><\/p>\n\n<p>\u9700\u8981\u5bf9\u7cfb\u7edf\u7684\u6ce8\u518c\u8868\u8fdb\u884c\u64cd\u4f5c\uff0c\u5982\u679c\u540c\u65f6\u5b58\u5728\u591a\u4e2a\u6ce8\u518c\u8868\u5bf9\u8c61\u7684\u8bdd\uff0c\u5c06\u65e0\u6cd5\u5bf9\u5e76\u53d1\u8bbf\u95ee\u6216\u8005\u4e34\u754c\u503c\u8fdb\u884c\u63a7\u5236\u3002<\/p>\n\n<p>\u5efa\u7acb\u4e00\u4e2a\u6ce8\u518c\u8868\u83b7\u53d6\u7c7b\uff0c\u4ece\u5176\u9759\u6001\u65b9\u6cd5\u4e2d\u83b7\u53d6\u6ce8\u518c\u8868\u5bf9\u8c61\uff0c\u5355\u4f8b\u91c7\u7528\u53cc\u91cd\u68c0\u67e5\u6cd5\u521b\u5efa\u3002<\/p>\n\n<p><strong>\u9002\u7528\u6027<\/strong><\/p>\n\n<p>\u5f53\u5bf9\u8c61\u7684\u64cd\u4f5c\u76ee\u6807\u662f\u5f53\u524d\u73af\u5883\u4e2d\u7684\u552f\u4e00\u8d44\u6e90\u65f6<\/p>\n\n<p><strong>\u7ed3\u6784<\/strong><\/p>\n\n<p><img src=\"http:\/\/my.csdn.net\/uploads\/201204\/26\/1335439688_4086.jpg\" alt=\"Singleton\" \/><\/p>\n\n<p><strong>\u6548\u679c<\/strong><\/p>\n\n<p>\u5c06\u53ef\u4ee5\u8fdb\u884c\u5e76\u53d1\u8bbf\u95ee\u63a7\u5236<\/p>\n\n<p><strong>\u5e94\u7528<\/strong><\/p>\n\n<p>Runtime<\/p>\n\n<p>NumberFormat<\/p>\n\n<p><strong>\u76f8\u5173<\/strong><\/p>\n\n<p>\u7b80\u5355\u5de5\u5382<\/p>\n\n<h2 id=\"\u5de5\u5382\u6a21\u5f0f\">\u5de5\u5382\u6a21\u5f0f<\/h2>\n\n<p><strong>\u5206\u7c7b<\/strong><\/p>\n\n<p>\u5de5\u5382\u65b9\u6cd5\uff0c\u62bd\u8c61\u5de5\u5382\uff0c\uff08\u7b80\u5355\u5de5\u5382\u7b97\u5de5\u5382\u65b9\u6cd5\u7684\u7279\u4f8b\uff09<\/p>\n\n<p><strong>\u5b9a\u4e49<\/strong><\/p>\n\n<p>\u5de5\u5382\u65b9\u6cd5\uff1a\u5b9a\u4e49\u4e86\u4e00\u4e2a\u521b\u5efa\u5bf9\u8c61\u7684\u63a5\u53e3\uff0c\u4f46\u7531\u5b50\u7c7b\u51b3\u5b9a\u9700\u8981\u5b9e\u4f8b\u5316\u7684\u7c7b\u662f\u54ea\u4e00\u4e2a\u3002\u5de5\u5382\u65b9\u6cd5\u5c06\u7c7b\u7684\u5b9e\u4f8b\u5316\u63a8\u8fdf\u5230\u5b50\u7c7b\u3002<\/p>\n\n<p>\u62bd\u8c61\u5de5\u5382\uff1a\u5b9a\u4e49\u4e00\u4e2a\u63a5\u53e3\uff0c\u7528\u4e8e\u521b\u5efa\u76f8\u5173\u6216\u4f9d\u8d56\u5bf9\u8c61\u7684\u5bb6\u65cf\uff0c\u800c\u4e0d\u7528\u660e\u786e\u6307\u5b9a\u5177\u4f53\u7684\u7c7b\u3002<\/p>\n\n<p><strong>\u6848\u4f8b<\/strong><\/p>\n\n<p>\u73b0\u6709\u7cfb\u7edf\u9700\u8981\u83b7\u53d6\u4e00\u7ec4\u6279\u8428\u997c\u7684\u8c03\u6599\uff0c\u4f46\u662f\u540c\u6837\u7684\u8c03\u6599\u5728\u4e0d\u540c\u7684\u5730\u70b9\u4f1a\u6709\u4e0d\u540c\uff0c\u5982\u6d77\u8fb9\u7684\u6d77\u9c9c\u662f\u65b0\u9c9c\u7684\uff0c\u800c\u5185\u5730\u7684\u6d77\u9c9c\u662f\u51b7\u51bb\u7684\uff0c\u4e3a\u4e86\u65b9\u4fbf\u6269\u5c55\uff0c\u83b7\u53d6\u7684\u8c03\u6599\u4e0d\u80fd\u4f9d\u8d56\u5177\u4f53\u7684\u5730\u70b9\u3002<\/p>\n\n<p>\u89e3\u51b3\u65b9\u6848\uff1a\u5c06\u83b7\u53d6\u8c03\u6599\u7684\u5730\u70b9\u62bd\u8c61\uff0c\u7531\u8fd0\u884c\u65f6\u7684\u5177\u4f53\u5730\u70b9\u751f\u6210\u4e00\u7ec4\u8c03\u6599\u3002<\/p>\n\n<p><strong>\u9002\u7528\u6027<\/strong><\/p>\n\n<p>\u5f53\u9700\u8981\u4f9d\u8d56\u8fd0\u884c\u65f6\u4e0a\u4e0b\u6587\u6765\u51b3\u5b9a\u751f\u6210\u7684\u4ea7\u54c1\u5bb6\u65cf\u65f6\u4f7f\u7528\u62bd\u8c61\u5de5\u5382<\/p>\n\n<p><strong>\u533a\u522b<\/strong><\/p>\n\n<p>\u5de5\u5382\u65b9\u6cd5\uff1a\u4e00\u4e2a\u62bd\u8c61\u4ea7\u54c1\uff0c\u53ef\u4ee5\u6d3e\u751f\u51fa\u591a\u79cd\u5177\u4f53\u4ea7\u54c1\uff1b\u4e00\u4e2a\u62bd\u8c61\u5de5\u5382\u7c7b\uff0c\u53ef\u4ee5\u6d3e\u751f\u51fa\u591a\u4e2a\u5177\u4f53\u5de5\u5382\u3002<\/p>\n\n<p>\u62bd\u8c61\u5de5\u5382\uff1a\u591a\u4e2a\u62bd\u8c61\u4ea7\u54c1\u7c7b\uff0c\u6bcf\u4e2a\u62bd\u8c61\u4ea7\u54c1\u7c7b\u53ef\u4ee5\u6d3e\u751f\u51fa\u591a\u4e2a\u5177\u4f53\u4ea7\u54c1\u7c7b\u3002\u4e00\u4e2a\u62bd\u8c61\u5de5\u5382\u7c7b\uff0c\u53ef\u4ee5\u6d3e\u751f\u51fa\u591a\u4e2a\u5177\u4f53\u5de5\u5382\u7c7b\u3002\u6bcf\u4e2a\u5177\u4f53\u5de5\u5382\u7c7b\u53ef\u4ee5\u521b\u5efa\u591a\u4e2a\u5177\u4f53\u4ea7\u54c1\u7c7b\u7684\u5b9e\u4f8b\u3002<\/p>\n\n<p><strong>\u7ed3\u6784<\/strong><\/p>\n\n<p>\u5de5\u5382\u65b9\u6cd5<\/p>\n\n<p><img src=\"http:\/\/hi.csdn.net\/attachment\/201203\/15\/0_1331817716F3IJ.gif\" alt=\"fatocymethod\" \/><\/p>\n\n<p>\u62bd\u8c61\u5de5\u5382<\/p>\n\n<p><img src=\"http:\/\/my.csdn.net\/uploads\/201204\/25\/1335357105_2682.jpg\" alt=\"absfactory\" \/><\/p>\n\n<p><strong>\u6548\u679c<\/strong><\/p>\n\n<p>\u80fd\u8f7b\u677e\u65b9\u4fbf\u5730\u6784\u9020\u5bf9\u8c61\u5b9e\u4f8b\uff0c\u800c\u4e0d\u5fc5\u5173\u5fc3\u6784\u9020\u5bf9\u8c61\u5b9e\u4f8b\u7684\u7ec6\u8282\u548c\u4f9d\u8d56\u6761\u4ef6\u3002<\/p>\n\n<p>\u7c7b\u6570\u91cf\u66b4\u589e<\/p>\n\n<p><strong>\u5e94\u7528<\/strong><\/p>\n\n<p>\u57fa\u672c\u88c5\u7bb1\u7c7b<\/p>\n\n<p>Collection\u7684iterator()<\/p>\n\n<p>log4j<\/p>\n\n<h1 id=\"\u884c\u4e3a\u578b\">\u884c\u4e3a\u578b<\/h1>\n\n<h2 id=\"\u7b56\u7565\u6a21\u5f0f\">\u7b56\u7565\u6a21\u5f0f<\/h2>\n\n<p><strong>\u5b9a\u4e49<\/strong><\/p>\n\n<p>\u5b9a\u4e49\u4e86\u7b97\u6cd5\u5bb6\u65cf\uff0c\u5206\u522b\u5c01\u88c5\u8d77\u6765\uff0c\u8ba9\u4ed6\u4eec\u4e4b\u95f4\u53ef\u4ee5\u76f8\u4e92\u66ff\u6362\uff0c\u6b64\u6a21\u5f0f\u8ba9\u7b97\u6cd5\u7684\u53d8\u5316\u72ec\u7acb\u4e8e\u4f7f\u7528\u7b97\u6cd5\u7684\u5ba2\u6237\u3002<\/p>\n\n<p><strong>\u6848\u4f8b<\/strong><\/p>\n\n<p>\u5b58\u5728\u4e00\u4e2a\u6a21\u62df\u9e2d\u5b50\u7684\u7a0b\u5e8f\uff0c\u73b0\u5728\u9700\u8981\u4e3a\u5176\u589e\u52a0\u98de\u7fd4\u7684\u529f\u80fd\uff0c\u5728\u9e2d\u5b50\u7684\u62bd\u8c61\u7c7b\u4e0a\u589e\u52a0<code class=\"language-plaintext highlighter-rouge\">fly()<\/code>\u65b9\u6cd5\u540e\uff0c\u98de\u7fd4\u80fd\u529b\u5c06\u4f20\u64ad\u5230\u6240\u6709\u7684\u5b50\u7c7b\u4e2d\u3002\u4f46\u662f\uff0c\u672c\u4e0d\u5e94\u8be5\u4f1a\u98de\u7684 \u201c\u6a21\u578b\u9e2d\u201d \u4e5f\u7ee7\u627f\u4e86\u98de\u7fd4\u80fd\u529b\uff0c\u5982\u679c\u5c06\u98de\u7fd4\u80fd\u529b\u62bd\u8c61\u4e3a <code class=\"language-plaintext highlighter-rouge\">Flayable<\/code>\u63a5\u53e3\uff0c\u90a3\u4e48\u968f\u7740\u7a0b\u5e8f\u7684\u6269\u5c55\uff0c\u90a3\u4e48\u6240\u6709\u5b50\u7c7b\u90fd\u5fc5\u987b\u91cd\u65b0\u5b9e\u73b0fly()\u65b9\u6cd5\uff0c\u5982\u6b64\u4e00\u6765\u5c06\u51fa\u73b0\u5927\u91cf\u7684\u91cd\u590d\u4ee3\u7801\uff0c\u5982\u679c\u5df2\u7ecf\u73b0\u5b58\u5f88\u591a\u6269\u5c55\u7c7b\uff0c\u4fee\u6539\u8fd9\u4e9b\u7c7b\u4e5f\u662f\u5f88\u5927\u7684\u5de5\u4f5c\u91cf\u3002<\/p>\n\n<p>\u6b64\u65f6\u7684\u89e3\u51b3\u65b9\u6848\u662f\uff1a\u5c06\u98de\u7fd4\u884c\u4e3a\u62bd\u8c61\uff0c\u5e76\u63d0\u4f9b\u51e0\u4e2a\u901a\u7528\u5b9e\u73b0\uff0c\u5c06\u9e2d\u5b50\u7684\u98de\u7fd4\u59d4\u6258\u7ed9\u98de\u7fd4\u884c\u4e3a\uff0c\u5728\u62bd\u8c61\u7c7b\u4e2d\u589e\u52a0set\u65b9\u6cd5\u6ce8\u518c\u59d4\u6258\uff0c\u8fd9\u6837\u7684\u6539\u52a8\u4e0d\u4f1a\u5f71\u54cd\u73b0\u6709\u7684\u7ed3\u6784\u3002<\/p>\n\n<p><strong>\u9002\u7528\u6027<\/strong><\/p>\n\n<p>\u5f53\u7c7b\u7684\u67d0\u4e2a\u884c\u4e3a\u968f\u7740\u6269\u5c55\u4e0d\u65ad\u53d1\u751f\u53d8\u5316\uff0c\u800c\u4e14\u8fd9\u79cd\u53d8\u5316\u53ea\u6709\u6709\u9650\u7684\u51e0\u79cd\u65f6\u3002<\/p>\n\n<p><strong>\u7ed3\u6784<\/strong><\/p>\n\n<p><img src=\"http:\/\/my.csdn.net\/uploads\/201205\/11\/1336732187_4598.jpg\" alt=\"Strategy\" \/><\/p>\n\n<p><strong>\u6548\u679c<\/strong><\/p>\n\n<p>\u79ef\u6781\uff1a<\/p>\n\n<p>1.\u7c7b\u4e0e\u884c\u4e3a\u53ef\u4ee5\u5206\u522b\u6269\u5c55\uff0c\u800c\u4e14\u6269\u5c55\u7c7b\u53ef\u4ee5\u81ea\u7531\u8bbe\u7f6e\u884c\u4e3a\uff0c\u751a\u81f3\u5728\u8fd0\u884c\u65f6\u6539\u53d8\u3002<\/p>\n\n<p>2.\u7c7b\u9884\u7f6e\u4e86\u591a\u4e2a\u7b97\u6cd5\uff0c\u9700\u8981\u8981\u5224\u65ad\u8c03\u7528\u65f6\u4e0a\u4e0b\u6587\u4ece\u800c\u9009\u62e9\u4e0d\u540c\u7b97\u6cd5\u3002\u7b56\u7565\u6a21\u5f0f\u53ef\u4ee5\u6d88\u9664\u4ee3\u7801\u4e2d\u7684 if lese \u5c06\u9009\u62e9\u6743\u4ea4\u7ed9\u5ba2\u6237<\/p>\n\n<p>\u6d88\u6781:<\/p>\n\n<p>1.\u5ba2\u6237\u7aef\u5fc5\u987b\u77e5\u9053\u6240\u6709\u7684\u7b56\u7565\u7c7b\uff0c\u5e76\u81ea\u884c\u51b3\u5b9a\u4f7f\u7528\u54ea\u4e00\u4e2a\u7b56\u7565\u7c7b\n2.\u7b56\u7565\u6a21\u5f0f\u5c06\u9020\u6210\u4ea7\u751f\u5f88\u591a\u7b56\u7565\u7c7b\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u4eab\u5143\u6a21\u5f0f\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u51cf\u5c11\u5bf9\u8c61\u7684\u6570\u91cf\u3002<\/p>\n\n<p><strong>\u5e94\u7528<\/strong><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">ThreadPoolExecutor<\/code>\u4e2d\u7684<code class=\"language-plaintext highlighter-rouge\">RejectedExecutionHandler<\/code><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">SpringSecurity<\/code>\u4e2d\u7684<code class=\"language-plaintext highlighter-rouge\">AccessDecisionManager<\/code><\/p>\n\n<p><strong>\u76f8\u5173<\/strong><\/p>\n\n<p>\u6a21\u677f\u65b9\u6cd5\u6a21\u5f0f<\/p>\n\n<p>\u547d\u4ee4\u6a21\u5f0f<\/p>\n\n<p>\u72b6\u6001\u6a21\u5f0f<\/p>\n\n<h2 id=\"\u6a21\u677f\u65b9\u6cd5\">\u6a21\u677f\u65b9\u6cd5<\/h2>\n\n<p><strong>\u5b9a\u4e49<\/strong><\/p>\n\n<p>\u5728\u4e00\u4e2a\u65b9\u6cd5\u4e2d\u4e00\u5b9a\u4e00\u4e2a\u7b97\u6cd5\u7684\u9aa8\u67b6\uff0c\u800c\u5c06\u67d0\u4e9b\u6b65\u9aa4\u5ef6\u8fdf\u5230\u5b50\u7c7b\u4e2d\u3002\u6a21\u677f\u65b9\u6cd5\u4f7f\u5f97\u5b50\u7c7b\u53ef\u4ee5\u5728\u4e0d\u6539\u53d8\u7b97\u6cd5\u7ed3\u6784\u7684\u60c5\u51b5\u4e0b\uff0c\u91cd\u65b0\u5b9a\u4e49\u7b97\u6cd5\u4e2d\u7684\u67d0\u4e9b\u6b65\u9aa4\u3002<\/p>\n\n<p><strong>\u6848\u4f8b<\/strong><\/p>\n\n<p>\u73b0\u6709\u4e00\u4e2a\u51b2\u6ce1\u996e\u6599\u7684\u7b97\u6cd5\uff0c\u6ce1\u5496\u5561\u548c\u6ce1\u8336\u7684\u6b65\u9aa4\u57fa\u672c\u76f8\u540c\uff0c\u4f46\u662f\u5728\u52a0\u8c03\u6599\u7684\u8fd9\u4e00\u6b65\u6709\u6240\u533a\u522b\uff0c\u5982\u4f55\u5728\u4e0d\u9700\u8981\u91cd\u5199\u6574\u4e2a\u51b2\u6ce1\u8fc7\u7a0b\u7684\u524d\u63d0\u4e0b\u6269\u5c55\uff1f<\/p>\n\n<p>\u89e3\u51b3\u65b9\u6848\uff1a\u5c06\u51b2\u6ce1\u8fc7\u7a0b\u4e2d\u7684\u653e\u8c03\u6599\u6b65\u9aa4\u62bd\u8c61\u51fa\u6765\u505a\u6210hook\uff0c\u5f85\u5177\u4f53\u7684\u5b9e\u73b0\u8005\u6765\u8865\u5168\u7b97\u6cd5\uff0c\u800c\u4e0d\u5fc5\u91cd\u5199\u6574\u4e2a\u51b2\u6ce1\u8fc7\u7a0b\u3002<\/p>\n\n<p><strong>\u9002\u7528\u6027<\/strong><\/p>\n\n<p>\u5f53\u7b97\u6cd5\u7684\u6574\u4f53\u9aa8\u67b6\u53ef\u88ab\u590d\u7528\uff0c\u53ea\u6709\u5176\u4e2d\u67d0\u4e2a\u6b65\u9aa4\u53ef\u53d8\u65f6<\/p>\n\n<p><strong>\u7ed3\u6784<\/strong><\/p>\n\n<p><img src=\"http:\/\/my.csdn.net\/uploads\/201205\/14\/1336965093_1048.jpg\" alt=\"templatemethod\" \/><\/p>\n\n<p><strong>\u6548\u679c<\/strong><\/p>\n\n<p>\u590d\u7528\u7b97\u6cd5\u9aa8\u67b6<\/p>\n\n<p>\u7b97\u6cd5\u53ef\u53d8\u6b65\u9aa4\u4e2d\u7684\u6bcf\u4e00\u4e2a\u7279\u4f8b\u90fd\u8981\u4e3a\u5176\u521b\u5efa\u4e00\u4e2a\u65b0\u7c7b<\/p>\n\n<p><strong>\u5e94\u7528<\/strong><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">Collections.sort<\/code><\/p>\n\n<p><strong>\u76f8\u5173<\/strong><\/p>\n\n<p>\u4e0e\u7b56\u7565\u6a21\u5f0f\u4e0d\u540c\uff0c\u7b56\u7565\u6a21\u5f0f\u5b9a\u4e49\u4e00\u4e2a\u7b97\u6cd5\u5bb6\u65cf\uff0c\u7b97\u6cd5\u53ef\u4ee5\u4e92\u6362\uff0c\u800c\u6a21\u677f\u65b9\u6cd5\u5b9a\u4e49\u4e00\u4e2a\u7b97\u6cd5\u5927\u7eb2\uff0c\u5176\u4e2d\u4e2a\u522b\u7684\u6b65\u9aa4\u53ef\u4ee5\u6709\u4e0d\u540c\u5b9e\u73b0\u3002<\/p>\n\n<h2 id=\"\u72b6\u6001\u6a21\u5f0f\">\u72b6\u6001\u6a21\u5f0f<\/h2>\n\n<p><strong>\u5b9a\u4e49<\/strong><\/p>\n\n<p>\u5141\u8bb8\u5bf9\u8c61\u5185\u90e8\u72b6\u6001\u6539\u53d8\u65f6\u6539\u53d8\u5b83\u7684\u884c\u4e3a\uff0c\u5bf9\u8c61\u770b\u8d77\u6765\u597d\u50cf\u4fee\u6539\u4e86\u5b83\u7684\u7c7b\u3002<\/p>\n\n<p><strong>\u6848\u4f8b<\/strong><\/p>\n\n<p>\u9700\u8981\u6a21\u62df\u4e00\u4e2a\u81ea\u52a8\u552e\u8d27\u673a\u7a0b\u5e8f\uff0c\u5982\u679c\u6ca1\u6709\u6295\u5e01\u5219\u53ea\u80fd\u6295\u5e01\uff1b\u5982\u679c\u5df2\u6295\u5e01\u5219\u4e0d\u80fd\u518d\u6295\u5e01\uff0c\u53ef\u4ee5\u9009\u62e9\u9000\u5e01\u6216\u8005\u51fa\u8d27\uff1b\u9009\u62e9\u51fa\u8d27\u540e\u5982\u679c\u6709\u8d27\u5219\u51fa\u8d27\u5e76\u7ed3\u675f\uff0c\u5982\u679c\u65ad\u8d27\u5219\u63d0\u793a\u65ad\u8d27\u3002<\/p>\n\n<p>\u53ef\u4ee5\u7528\u5927\u91cf\u7684 if else \u5c06\u5982\u4e0a\u63cf\u8ff0\u5199\u6210\u8fc7\u7a0b\u8bdd\u7684\u5224\u65ad\u8bed\u53e5\u4ee5\u5b8c\u6210\u529f\u80fd\uff0c\u7136\u800c\u73b0\u5728\u9700\u8981\u589e\u52a0\u4e00\u4e2a\u529f\u80fd\uff0c\u6709\u5341\u5206\u4e4b\u4e00\u7684\u51e0\u7387\u53cc\u500d\u51fa\u8d27\u3002\u8fd9\u6837\u4e00\u6765\u5c31\u9700\u8981\u5728\u6bcf\u4e2a\u52a8\u4f5c\u65b9\u6cd5\u5185\u5224\u65ad\u5f53\u524d\u64cd\u4f5c\u8005\u662f\u4e0d\u662f\u5e78\u8fd0\u513f\u3002<\/p>\n\n<p>\u89e3\u51b3\u65b9\u6848\uff1a\u5c06\u72b6\u6001\u5c01\u88c5\u6210\u72ec\u7acb\u7684\u7c7b\uff0c\u5e76\u5c06\u52a8\u4f5c\u59d4\u6258\u5230\u4ee3\u8868\u5f53\u524d\u72b6\u6001\u7684\u5bf9\u8c61\u3002\u7701\u53bb\u4e86\u7c7b\u4e2d\u5197\u957f\u7684\u72b6\u6001\u5224\u65ad\u3002<\/p>\n\n<p><strong>\u9002\u7528\u6027<\/strong><\/p>\n\n<p>\u884c\u4e3a\u56e0\u4e3a\u4e0a\u4e0b\u6587\u7684\u4e0d\u540c\u800c\u9700\u8981\u968f\u4e4b\u53d8\u5316<\/p>\n\n<p>\u4ee3\u7801\u4e2d\u5305\u542b\u5927\u91cf\u4e0e\u5bf9\u8c61\u72b6\u6001\u6709\u5173\u7684\u6761\u4ef6\u8bed\u53e5:\u4e00\u4e2a\u64cd\u4f5c\u4e2d\u542b\u6709\u5e9e\u5927\u7684\u591a\u5206\u652f\u7684\u6761\u4ef6\uff08if else(\u6216switch case)\u8bed\u53e5\uff0c\u4e14\u8fd9\u4e9b\u5206\u652f\u4f9d\u8d56\u4e8e\u8be5\u5bf9\u8c61\u7684\u72b6\u6001\u3002<\/p>\n\n<p><strong>\u7ed3\u6784<\/strong><\/p>\n\n<p><img src=\"http:\/\/my.csdn.net\/uploads\/201205\/11\/1336719144_5496.jpg\" alt=\"state\" \/><\/p>\n\n<p><strong>\u6548\u679c<\/strong><\/p>\n\n<p>\u5b83\u5c06\u4e0e\u7279\u5b9a\u72b6\u6001\u76f8\u5173\u7684\u884c\u4e3a\u5c40\u90e8\u5316\uff0c\u5e76\u4e14\u5c06\u4e0d\u540c\u72b6\u6001\u7684\u884c\u4e3a\u5206\u5272\u5f00\u6765<\/p>\n\n<p>\u5b83\u4f7f\u5f97\u72b6\u6001\u8f6c\u6362\u663e\u5f0f\u5316<\/p>\n\n<p>\u72b6\u6001\u5bf9\u8c61\u53ef\u88ab\u5171\u4eab<\/p>\n\n<p>\u72b6\u6001\u6a21\u5f0f\u7684\u4f7f\u7528\u5fc5\u7136\u4f1a\u589e\u52a0\u7cfb\u7edf\u7c7b\u548c\u5bf9\u8c61\u7684\u4e2a\u6570\u3002<\/p>\n\n<p>\u72b6\u6001\u6a21\u5f0f\u7684\u7ed3\u6784\u4e0e\u5b9e\u73b0\u90fd\u8f83\u4e3a\u590d\u6742\uff0c\u5982\u679c\u4f7f\u7528\u4e0d\u5f53\u5c06\u5bfc\u81f4\u7a0b\u5e8f\u7ed3\u6784\u548c\u4ee3\u7801\u7684\u6df7\u4e71\u3002<\/p>\n\n<p><strong>\u5e94\u7528<\/strong><\/p>\n\n<p>java.util.Iterator<\/p>\n\n<p>\u52a8\u4f5c\u6e38\u620f\u8fde\u62db<\/p>\n\n<p><strong>\u76f8\u5173<\/strong><\/p>\n\n<p>\u662f\u7b56\u7565\u6a21\u5f0f\u7684\u589e\u5f3a\u7248\uff0c\u533a\u522b\u5728\u4e8e\u610f\u56fe\uff0c\u7b56\u7565\u6a21\u5f0f\u867d\u7136\u4e5f\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u6539\u53d8\u884c\u4e3a\uff0c\u4f46\u662f\u7b56\u7565\u6a21\u5f0f\u901a\u5e38\u6709\u4e00\u4e2a\u6700\u9002\u5408\u7684\u7b56\u7565\u5bf9\u8c61\uff1b\u800c\u72b6\u6001\u6a21\u5f0f\u9700\u8981\u5728\u591a\u4e2a\u72b6\u6001\u5bf9\u8c61\u4e2d\u6e38\u8d70\uff0c\u6ca1\u6709\u6240\u8c13\u7684\u6700\u9002\u5408\u72b6\u6001\u3002<\/p>\n\n<h2 id=\"\u547d\u4ee4\u6a21\u5f0f\">\u547d\u4ee4\u6a21\u5f0f<\/h2>\n\n<p><strong>\u5b9a\u4e49<\/strong><\/p>\n\n<p>\u5c06\u8bf7\u6c42\u5c01\u88c5\u6210\u5bf9\u8c61\uff0c\u4ee5\u4fbf\u4f7f\u7528\u4e0d\u540c\u8bf7\u6c42\uff0c\u961f\u5217\u6216\u65e5\u5fd7\u6765\u53c2\u6570\u5316\u5176\u4ed6\u5bf9\u8c61\uff0c\u547d\u4ee4\u6a21\u5f0f\u4e5f\u652f\u6301\u53ef\u64a4\u9500\u7684\u64cd\u4f5c\u3002<\/p>\n\n<p><strong>\u6848\u4f8b<\/strong><\/p>\n\n<p>\u901a\u7528\u9065\u63a7\u5668\uff0c\u5f53\u76ee\u6807\u4e3a\u7535\u89c6\u65f6\uff0c\u4e0a\u4e0b\u952e\u53ef\u4ee5\u662f\u6362\u53f0\uff0c\u8c03\u6574\u97f3\u91cf\uff1b\u5f53\u76ee\u6807\u4e3a\u7a7a\u8c03\u65f6\uff0c\u4e0a\u4e0b\u952e\u53ef\u4ee5\u662f\u8c03\u6e29\u6216\u8005\u8c03\u6574\u5b9a\u65f6\uff1b\u800c\u4e14\u53ef\u4ee5\u65b9\u4fbf\u5730\u6269\u5c55\u4ee5\u517c\u5bb9\u4e0d\u540c\u7535\u5668\u3002<\/p>\n\n<p>\u89e3\u51b3\u65b9\u6848\uff0c\u5c06\u9065\u63a7\u5668\u4e0e\u7535\u5668\u63a5\u5076\uff0c\u5c06\u9065\u63a7\u5668\u6bcf\u4e2a\u6309\u94ae\u62bd\u8c61\u4e3a\u4e00\u4e2a\u547d\u4ee4\uff0c\u7531\u4f7f\u7528\u8005\u63d0\u4f9b\u547d\u4ee4\uff0c\u9065\u63a7\u5668\u547c\u53eb\u6b64\u547d\u4ee4\uff0c\u7531\u547d\u4ee4\u81ea\u8eab\u547c\u53eb\u771f\u5b9e\u76ee\u6807\u3002<\/p>\n\n<p><strong>\u9002\u7528\u6027<\/strong><\/p>\n\n<p>\u5f53\u8bf7\u6c42\u7684\u771f\u5b9e\u76ee\u6807\u4e0d\u660e\u786e\uff0c\u6216\u8005\u5bf9\u8bf7\u6c42\u8fdb\u884c\u4e0d\u660e\u786e\u7684\u5904\u7406\u65f6(\u5982\u961f\u5217\uff0c\u5b8f\u547d\u4ee4\uff0c\u65e5\u5fd7\u8bb0\u5f55\u7b49)\u3002<\/p>\n\n<p><strong>\u7ed3\u6784<\/strong><\/p>\n\n<p><img src=\"http:\/\/my.csdn.net\/uploads\/201205\/09\/1336547877_9980.jpg\" alt=\"cmd\" \/><\/p>\n\n<p><strong>\u6548\u679c<\/strong><\/p>\n\n<p>\u79ef\u6781\u7684\uff1a<\/p>\n\n<p>\u964d\u4f4e\u7cfb\u7edf\u7684\u8026\u5408\u5ea6:Command\u6a21\u5f0f\u5c06\u8c03\u7528\u64cd\u4f5c\u7684\u5bf9\u8c61\u4e0e\u77e5\u9053\u5982\u4f55\u5b9e\u73b0\u8be5\u64cd\u4f5c\u7684\u5bf9\u8c61\u89e3\u8026\u3002<\/p>\n\n<p>\u7ec4\u5408\u547d\u4ee4:\u4f60\u53ef\u5c06\u591a\u4e2a\u547d\u4ee4\u88c5\u914d\u6210\u4e00\u4e2a\u7ec4\u5408\u547d\u4ee4\uff0c\u5373\u53ef\u4ee5\u6bd4\u8f83\u5bb9\u6613\u5730\u8bbe\u8ba1\u4e00\u4e2a\u547d\u4ee4\u961f\u5217\u548c\u5b8f\u547d\u4ee4\u3002\u4e00\u822c\u8bf4\u6765\uff0c\u7ec4\u5408\u547d\u4ee4\u662fComposite\u6a21\u5f0f\u7684\u4e00\u4e2a\u5b9e\u4f8b\u3002<\/p>\n\n<p>\u589e\u52a0\u65b0\u7684Command\u5f88\u5bb9\u6613\uff0c\u56e0\u4e3a\u8fd9\u65e0\u9700\u6539\u53d8\u5df2\u6709\u7684\u7c7b\u3002<\/p>\n\n<p>\u53ef\u4ee5\u65b9\u4fbf\u5730\u5b9e\u73b0\u5bf9\u8bf7\u6c42\u7684Undo\u548cRedo\u3002\u7528\u6808\u5b58\u50a8\u64cd\u4f5c\u5e8f\u5217\uff0c\u53ef\u4ee5\u5b9e\u73b0\u591a\u5c42\u6b21\u64a4\u9500\u3002<\/p>\n\n<p>\u6d88\u6781\u7684\uff1a<\/p>\n\n<p>\u5bfc\u81f4\u67d0\u4e9b\u7cfb\u7edf\u6709\u8fc7\u591a\u7684\u5177\u4f53\u547d\u4ee4\u7c7b<\/p>\n\n<p><strong>\u5e94\u7528<\/strong><\/p>\n\n<p>java.lang.Runnable<\/p>\n\n<p>javax.swing.Action<\/p>\n\n<p>\u6e38\u620f\u4e2d\u7684\u81ea\u5b9a\u4e49\u952e\u4f4d<\/p>\n\n<p><strong>\u76f8\u5173<\/strong><\/p>\n\n<p>\u7b56\u7565\u6a21\u5f0f\u805a\u7126\u7684\u662f\u5bf9\u76f8\u540c\u8bf7\u6c42\u66f4\u6362\u89e3\u51b3\u65b9\u6848\u7684\u7075\u6d3b\u6027\uff1b\u800c\u547d\u4ee4\u6a21\u5f0f\u805a\u7126\u7684\u662f\u5bf9\u591a\u8bf7\u6c42\u53d8\u5316\u7684\u5c01\u88c5\u4ee5\u53ca\u5bf9\u76f8\u540c\u8bf7\u6c42\u4e0d\u540c\u7684\u8bf7\u6c42\u5f62\u5f0f\u89e3\u51b3\u65b9\u6cd5\u7684\u53ef\u590d\u7528\u6027<\/p>\n\n<p>\u7ec4\u5408\u6a21\u5f0f<\/p>\n\n<h2 id=\"\u89c2\u5bdf\u8005\u6a21\u5f0f\">\u89c2\u5bdf\u8005\u6a21\u5f0f<\/h2>\n\n<p><strong>\u5b9a\u4e49<\/strong><\/p>\n\n<p>\u5b9a\u4e49\u4e86\u5bf9\u8c61\u4e4b\u95f4\u7684\u4e00\u5bf9\u591a\u4f9d\u8d56\uff0c\u8fd9\u6837\u4e00\u6765\uff0c\u5f53\u4e00\u4e2a\u5bf9\u8c61\u6539\u53d8\u72b6\u6001\u65f6\uff0c\u6240\u6709\u6240\u6709\u4f9d\u8d56\u8005\u90fd\u4f1a\u63a5\u5230\u901a\u77e5\u5e76\u81ea\u52a8\u66f4\u65b0<\/p>\n\n<p><strong>\u6848\u4f8b<\/strong><\/p>\n\n<p>\u9700\u8981\u5728\u5c55\u677f\u4e0a\u5b9e\u65f6\u663e\u793a\u5f53\u524d\u6e29\u5ea6\uff0c\u6e29\u5ea6\u6570\u636e\u6765\u81ea\u6e29\u5ea6\u8ba1\u3002\u521d\u6b65\u65b9\u68481,\u662f\u5b9a\u65f6\u8be2\u95ee\u6e29\u5ea6\u8ba1\u7136\u540e\u66f4\u65b0\u6570\u636e\uff0c\u8fd9\u6837\u5c31\u9700\u8981\u518d\u5f00\u4e00\u4e2a\u5b9a\u65f6\u5668\u7ebf\u7a0b\uff0c\u5982\u679c\u4ee5\u540e\u4f1a\u6709\u66f4\u591a\u7684\u529f\u80fd\u9700\u8981\u83b7\u53d6\u6e29\u5ea6\u8ba1\u6570\u636e\uff0c\u90a3\u4e48\u7ebf\u7a0b\u6570\u91cf\u5c06\u5931\u53bb\u63a7\u5236\u3002\u6570\u6b65\u65b9\u68482\u662f\u5f53\u6e29\u5ea6\u8ba1\u6570\u636e\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u76f4\u63a5\u901a\u77e5\u8fd9\u4e9b\u6570\u636e\u8bf7\u6c42\u8005\uff0c\u4f46\u662f\u5f53\u6709\u65b0\u7684\u8bf7\u6c42\u8005\u65f6\uff0c\u9700\u8981\u6253\u5f00\u6e29\u5ea6\u8ba1\u7c7b\u589e\u52a0\u4e00\u4e2a\u8bf7\u6c42\u8005\u3002<\/p>\n\n<p>\u7ed3\u5c40\u65b9\u6848\uff1a\u5c06\u9700\u8981\u83b7\u53d6\u6e29\u5ea6\u8ba1\u6570\u636e\u7684\u8bf7\u6c42\u8005\u62bd\u8c61\uff0c\u7136\u540e\u6ce8\u518c\u5230\u6e29\u5ea6\u8ba1\u4e2d\u5f62\u6210\u4e00\u4e2a\u5217\u8868\uff0c\u6bcf\u5f53\u6e29\u5ea6\u8ba1\u6570\u636e\u53d1\u751f\u53d8\u5316\uff0c\u5c31\u4f9d\u6b21\u901a\u77e5\u8fd9\u4e9b\u6ce8\u518c\u7684\u5bf9\u8c61\u3002<\/p>\n\n<p><strong>\u9002\u7528\u6027<\/strong><\/p>\n\n<p>\u5f53\u4e00\u4e2a\u62bd\u8c61\u6a21\u578b\u6709\u4e24\u4e2a\u65b9\u9762, \u5176\u4e2d\u4e00\u4e2a\u65b9\u9762\u4f9d\u8d56\u4e8e\u53e6\u4e00\u65b9\u9762\u7684\u72b6\u6001\u3002\u5c06\u8fd9\u4e8c\u8005\u5c01\u88c5\u5728\u72ec\u7acb\u7684\u5bf9\u8c61\u4e2d\u4ee5\u4f7f\u5b83\u4eec\u53ef\u4ee5\u5404\u81ea\u72ec\u7acb\u5730\u6539\u53d8\u548c\u590d\u7528\u3002<\/p>\n\n<p>\u5f53\u5bf9\u4e00\u4e2a\u5bf9\u8c61\u7684\u6539\u53d8\u9700\u8981\u540c\u65f6\u6539\u53d8\u5176\u5b83\u5bf9\u8c61 , \u800c\u4e0d\u77e5\u9053\u5177\u4f53\u6709\u591a\u5c11\u5bf9\u8c61\u6709\u5f85\u6539\u53d8\u3002<\/p>\n\n<p>\u5f53\u4e00\u4e2a\u5bf9\u8c61\u5fc5\u987b\u901a\u77e5\u5176\u5b83\u5bf9\u8c61\uff0c\u800c\u5b83\u53c8\u4e0d\u80fd\u5047\u5b9a\u5176\u5b83\u5bf9\u8c61\u662f\u8c01\u3002\u6362\u8a00\u4e4b , \u4f60\u4e0d\u5e0c\u671b\u8fd9\u4e9b\u5bf9\u8c61\u662f\u7d27\u5bc6\u8026\u5408\u7684\u3002<\/p>\n\n<p><strong>\u7ed3\u6784<\/strong><\/p>\n\n<p><img src=\"http:\/\/my.csdn.net\/uploads\/201205\/11\/1336707179_9037.jpg\" alt=\"Observer\" \/><\/p>\n\n<p><strong>\u6548\u679c<\/strong><\/p>\n\n<p>Observer\u6a21\u5f0f\u5141\u8bb8\u4f60\u72ec\u7acb\u7684\u6539\u53d8\u76ee\u6807\u548c\u89c2\u5bdf\u8005<\/p>\n\n<p>\u89c2\u5bdf\u8005\u6a21\u5f0f\u53ef\u4ee5\u5b9e\u73b0\u8868\u793a\u5c42\u548c\u6570\u636e\u903b\u8f91\u5c42\u7684\u5206\u79bb<\/p>\n\n<p>\u652f\u6301\u5e7f\u64ad\u901a\u4fe1<\/p>\n\n<p><strong>\u5e94\u7528<\/strong><\/p>\n\n<p>java.util.EventListener<\/p>\n\n<p><strong>\u76f8\u5173<\/strong><\/p>\n\n<p>\u7ec8\u7ed3\u8005\u6a21\u5f0f<\/p>\n\n<p>\u5355\u4f8b\u6a21\u5f0f<\/p>\n\n<h2 id=\"\u8fed\u4ee3\u5668\u6a21\u5f0f\">\u8fed\u4ee3\u5668\u6a21\u5f0f<\/h2>\n\n<p><strong>\u5b9a\u4e49<\/strong><\/p>\n\n<p>\u63d0\u4f9b\u4e00\u79cd\u65b9\u6cd5\u987a\u5e8f\u8bbf\u95ee\u805a\u5408\u5bf9\u8c61\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\uff0c\u800c\u53c8\u4e0d\u66b4\u9732\u5176\u5185\u90e8\u8868\u793a\u3002<\/p>\n\n<p><strong>\u7ed3\u6784<\/strong><\/p>\n\n<p><img src=\"http:\/\/my.csdn.net\/uploads\/201205\/28\/1338213169_8415.jpg\" alt=\"Iterator\" \/><\/p>\n\n<p><strong>\u6548\u679c<\/strong><\/p>\n\n<p>\u5c01\u88c5\u6027\u826f\u597d\uff0c\u7528\u6237\u53ea\u9700\u8981\u5f97\u5230\u8fed\u4ee3\u5668\u5c31\u53ef\u4ee5\u904d\u5386\uff0c\u800c\u5bf9\u4e8e\u904d\u5386\u7b97\u6cd5\u5219\u4e0d\u7528\u53bb\u5173\u5fc3\u3002<\/p>\n\n<p>\u589e\u52a0\u65b0\u7684\u805a\u5408\u7c7b\u9700\u8981\u5bf9\u5e94\u589e\u52a0\u65b0\u7684\u8fed\u4ee3\u5668\u7c7b\uff0c\u7c7b\u7684\u4e2a\u6570\u6210\u5bf9\u589e\u52a0<\/p>\n\n<p><strong>\u5e94\u7528<\/strong><\/p>\n\n<p>java.util.Iterator\njava.util.Enumeration<\/p>\n\n<p><strong>\u76f8\u5173<\/strong><\/p>\n\n<p>\u7ec4\u5408\u6a21\u5f0f\uff0c\u5e38\u7528\u6765\u4fbf\u5229\u7ec4\u5408\u6a21\u5f0f\u7684\u5bf9\u8c61\u56fe<\/p>\n\n<p>\u5907\u5fd8\u5f55\u6a21\u5f0f<\/p>\n\n<p>\u5de5\u5382\u65b9\u6cd5\u6a21\u5f0f\uff0c\u8fed\u4ee3\u5668\u5bf9\u8c61\u7531\u5b9e\u73b0\u7c7b\u63d0\u4f9b<\/p>\n\n<h1 id=\"\u7ed3\u6784\u578b\">\u7ed3\u6784\u578b<\/h1>\n\n<h2 id=\"\u88c5\u9970\u8005\u6a21\u5f0f\">\u88c5\u9970\u8005\u6a21\u5f0f<\/h2>\n\n<p><strong>\u5b9a\u4e49<\/strong><\/p>\n\n<p>\u52a8\u6001\u5730\u5c06\u804c\u8d23\u9644\u52a0\u5230\u5bf9\u8c61\u4e0a\uff0c\u82e5\u8981\u6269\u5c55\u529f\u80fd\uff0c\u88c5\u9970\u8005\u63d0\u4f9b\u4e86\u6bd4\u7ee7\u627f\u66f4\u6709\u5f39\u6027\u7684\u66ff\u4ee3\u65b9\u6848\u3002<\/p>\n\n<p><strong>\u6848\u4f8b<\/strong><\/p>\n\n<p>\u6a21\u62df\u4e00\u4e2a\u51b2\u6ce1\u5496\u5561\u7684\u7a0b\u5e8f\uff0c\u8c03\u6599\u79cd\u7c7b\u672a\u77e5\uff0c\u800c\u4e14\u4ee5\u540e\u53ef\u80fd\u589e\u51cf\uff0c\u6bcf\u79cd\u8c03\u6599\u4ef7\u683c\u4e0d\u540c\uff0c\u5ba2\u6237\u53ef\u81ea\u884c\u9009\u62e9\u8c03\u6599\u4efd\u91cf\uff0c\u73b0\u5728\u9700\u8981\u8ba1\u7b97\u8be5\u5496\u5561\u7684\u4ef7\u683c\u3002\u521d\u6b65\u65b9\u6848\u662f\u5217\u51fa\u6240\u6709\u53ef\u80fd\u7684\u7ec4\u5408\uff0c\u7136\u540e\u8ba1\u7b97\u7ec4\u5408\u7684\u4ef7\u683c\uff0c\u4f46\u662f\u5982\u679c\u8c03\u6599\u79cd\u7c7b\u8f83\u591a\uff0c\u90a3\u4e48\u7ec4\u5408\u5c06\u4f1a\u7206\u70b8\uff0c\u8003\u8651\u5230\u8c03\u6599\u7684\u4efd\u91cf\u6709\u65e0\u9650\u79cd\u53ef\u80fd\uff0c\u5217\u4e3e\u7ec4\u5408\u65b9\u5f0f\u4e0d\u53ef\u884c\u3002<\/p>\n\n<p>\u89e3\u51b3\u65b9\u6848\uff1a\u5c06\u5496\u5561\u62bd\u8c61\uff0c\u5c06\u6bcf\u79cd\u8c03\u6599\u5bf9\u5e94\u4e00\u79cd\u5496\u5561\uff0c\u5982\u52a0\u5976\u7684\u5496\u5561\uff0c\u52a0\u6469\u5361\u7684\u5496\u5561\u7b49\uff0c\u8fd9\u4e9b\u8c03\u6599\u7684\u5496\u5561\u6210\u5206\u7531\u5ba2\u6237\u81ea\u5df1\u63d0\u4f9b\u3002<\/p>\n\n<p><strong>\u9002\u7528\u6027<\/strong><\/p>\n\n<p>\u5f53\u9700\u8981\u5bf9\u4e00\u4e2a\u5bf9\u8c61\u4ee5\u53ef\u9009\u7684\u65b9\u5f0f\u589e\u5f3a\u529f\u80fd\u65f6<\/p>\n\n<p>\u5f53\u65e0\u6cd5\u4f7f\u7528\u7ee7\u627f\u7684\u65b9\u5f0f\u589e\u5f3a\u529f\u80fd\u65f6<\/p>\n\n<p><strong>\u7ed3\u6784<\/strong><\/p>\n\n<p><img src=\"http:\/\/my.csdn.net\/uploads\/201205\/03\/1336034007_4657.jpg\" alt=\"decorater\" \/><\/p>\n\n<p>\u62bd\u8c61\u7ec4\u4ef6\u89d2\u8272(Component)\uff1a\u5b9a\u4e49\u4e00\u4e2a\u5bf9\u8c61\u63a5\u53e3\uff0c\u4ee5\u89c4\u8303\u51c6\u5907\u63a5\u53d7\u9644\u52a0\u8d23\u4efb\u7684\u5bf9\u8c61\uff0c<\/p>\n\n<p>\u5373\u53ef\u4ee5\u7ed9\u8fd9\u4e9b\u5bf9\u8c61\u52a8\u6001\u5730\u6dfb\u52a0\u804c\u8d23\u3002<\/p>\n\n<p>\u5177\u4f53\u7ec4\u4ef6\u89d2\u8272(ConcreteComponent) :\u88ab\u88c5\u9970\u8005\uff0c\u5b9a\u4e49\u4e00\u4e2a\u5c06\u8981\u88ab\u88c5\u9970\u589e\u52a0\u529f\u80fd\u7684\u7c7b\u3002<\/p>\n\n<p>\u53ef\u4ee5\u7ed9\u8fd9\u4e2a\u7c7b\u7684\u5bf9\u8c61\u6dfb\u52a0\u4e00\u4e9b\u804c\u8d23<\/p>\n\n<p>\u62bd\u8c61\u88c5\u9970\u5668(Decorator):\u7ef4\u6301\u4e00\u4e2a\u6307\u5411\u6784\u4ef6Component\u5bf9\u8c61\u7684\u5b9e\u4f8b\uff0c<\/p>\n\n<p>\u5e76\u5b9a\u4e49\u4e00\u4e2a\u4e0e\u62bd\u8c61\u7ec4\u4ef6\u89d2\u8272Component\u63a5\u53e3\u4e00\u81f4\u7684\u63a5\u53e3<\/p>\n\n<p>\u5177\u4f53\u88c5\u9970\u5668\u89d2\u8272\uff08ConcreteDecorator):\u5411\u7ec4\u4ef6\u6dfb\u52a0\u804c\u8d23\u3002<\/p>\n\n<p><strong>\u6548\u679c<\/strong><\/p>\n\n<p>\u8fd0\u884c\u65f6\u6269\u5c55\u73b0\u6709\u5bf9\u8c61\uff0c\u6bd4\u7ee7\u627f\u7075\u6d3b\u3002<\/p>\n\n<p>\u4ea7\u751f\u5f88\u591a\u5c0f\u7c7b<\/p>\n\n<p><strong>\u5e94\u7528<\/strong><\/p>\n\n<p>java.io.BufferedInputStream(InputStream)<\/p>\n\n<p>java.io.DataInputStream(InputStream)<\/p>\n\n<p>java.io.BufferedOutputStream(OutputStream)<\/p>\n\n<p>java.util.zip.ZipOutputStream(OutputStream)<\/p>\n\n<table>\n  <tbody>\n    <tr>\n      <td>java.util.Collections# checkedList<\/td>\n      <td>Map<\/td>\n      <td>Set<\/td>\n      <td>SortedSet<\/td>\n      <td>SortedMap<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n<p><strong>\u76f8\u5173<\/strong><\/p>\n\n<p>\u53ef\u4e0e\u5de5\u5382\u6a21\u5f0f\u548c\u751f\u6210\u5668\u6a21\u5f0f\u914d\u5408\u4f7f\u7528<\/p>\n\n<p>Decorator\u6a21\u5f0f\u4e0d\u540c\u4e8eAdapter\u6a21\u5f0f\uff0c\u56e0\u4e3a\u88c5\u9970\u4ec5\u6539\u53d8\u5bf9\u8c61\u7684\u804c\u8d23\u800c\u4e0d\u6539\u53d8\u5b83\u7684\u63a5\u53e3\uff1b\u800c\u9002\u914d\u5668\u5c06\u7ed9\u5bf9\u8c61\u4e00\u4e2a\u5168\u65b0\u7684\u63a5\u53e3\u3002<\/p>\n\n<p>Strategy\u6a21\u5f0f\uff1a\u7528\u4e00\u4e2a\u88c5\u9970\u4f60\u53ef\u4ee5\u6539\u53d8\u5bf9\u8c61\u7684\u5916\u8868\uff1b\u800cStrategy\u6a21\u5f0f\u4f7f\u5f97\u4f60\u53ef\u4ee5\u6539\u53d8\u5bf9\u8c61\u7684\u5185\u6838\u3002\u8fd9\u662f\u6539\u53d8\u5bf9\u8c61\u7684\u4e24\u79cd\u9014\u5f84\u3002<\/p>\n\n<h2 id=\"\u9002\u914d\u5668\u6a21\u5f0f\">\u9002\u914d\u5668\u6a21\u5f0f<\/h2>\n\n<p><strong>\u5b9a\u4e49<\/strong><\/p>\n\n<p>\u5c06\u4e00\u4e2a\u7c7b\u7684\u63a5\u53e3\uff0c\u8f6c\u6362\u6210\u5ba2\u6237\u671f\u671b\u7684\u53e6\u4e00\u4e2a\u63a5\u53e3\uff0c\u9002\u914d\u5668\u8ba9\u539f\u672c\u63a5\u53e3\u4e0d\u517c\u5bb9\u7684\u7c7b\u53ef\u4ee5\u5408\u4f5c\u65e0\u95f4\u3002<\/p>\n\n<p><strong>\u6848\u4f8b<\/strong><\/p>\n\n<p>\u63d2\u5ea7\u6709\u63d2\u5934\u578b\u53f7\u5bf9\u4e0d\u4e0a\uff0c\u7528\u9002\u914d\u5668\u6293\u6362\u4e0b\u3002<\/p>\n\n<p><strong>\u9002\u7528\u6027<\/strong><\/p>\n\n<p>\u60f3\u4f7f\u7528\u4e00\u4e2a\u5df2\u7ecf\u5b58\u5728\u7684\u7c7b\uff0c\u800c\u5b83\u7684\u63a5\u53e3\u4e0d\u7b26\u5408\u9700\u6c42\u65f6\u3002<\/p>\n\n<p><strong>\u7ed3\u6784<\/strong><\/p>\n\n<p>\u7c7b\u9002\u914d\u5668<\/p>\n\n<p><img src=\"http:\/\/my.csdn.net\/uploads\/201205\/02\/1335939433_8937.jpg\" alt=\"adapter1\" \/><\/p>\n\n<p>\u5bf9\u8c61\u9002\u914d\u5668<\/p>\n\n<p><img src=\"http:\/\/my.csdn.net\/uploads\/201205\/02\/1335939552_3860.jpg\" alt=\"adapter2\" \/><\/p>\n\n<p><strong>\u5e94\u7528<\/strong><\/p>\n\n<p>java.util.Arrays# asList()<\/p>\n\n<p>java.io.InputStreamReader(InputStream)<\/p>\n\n<p>java.io.OutputStreamWriter(OutputStream)<\/p>\n\n<p><strong>\u76f8\u5173<\/strong><\/p>\n\n<p>\u7c7b\u4f3c\u88c5\u9970\u8005\uff0c\u800c\u8005\u90fd\u662f\u5305\u88c5\u5bf9\u8c61\uff0c\u4f46\u662f\u88c5\u9970\u8005\u4ece\u4e0d\u8f6c\u6362\u63a5\u53e3\uff0c\u53ea\u662f\u589e\u52a0\u804c\u8d23\uff0c\u800c\u9002\u914d\u5668\u6b63\u662f\u8f6c\u6362\u63a5\u53e3\u3002<\/p>\n\n<p>\u5916\u89c2\u6a21\u5f0f<\/p>\n\n<h2 id=\"\u4ee3\u7406\u6a21\u5f0f\">\u4ee3\u7406\u6a21\u5f0f<\/h2>\n\n<p><strong>\u5b9a\u4e49<\/strong><\/p>\n\n<p>\u4e3a\u53e6\u4e00\u4e2a\u5bf9\u8c61\u63d0\u4f9b\u4e00\u4e2a\u66ff\u8eab\u6216\u5360\u4f4d\u7b26\u4ee5\u63a7\u5236\u5bf9\u8fd9\u4e2a\u5bf9\u8c61\u7684\u8bbf\u95ee<\/p>\n\n<p><strong>\u6848\u4f8b<\/strong><\/p>\n\n<p>\u9700\u8981\u7f16\u5199\u4e00\u4e2a\u7c7b\u6765\u76d1\u63a7\u8fdc\u7a0b\u670d\u52a1\u5668\u4e0a\u7684\u4e00\u4e9b\u6570\u636e\uff0c\u4f46\u662f\u5e0c\u671b\u8fd9\u4e2a\u7c7b\u6613\u4e8e\u4f7f\u7528\u3002\u7ed3\u5c40\u65b9\u6848\uff0c\u5c06\u8fdc\u7a0b\u670d\u52a1\u4e0a\u7684\u6570\u636e\u62bd\u8c61\u6210\u4e00\u4e2a\u63a5\u53e3\uff0c\u7528RMI\u8fdb\u884c\u901a\u4fe1\uff0c\u770b\u8d77\u6765\u5c31\u597d\u8c61\u76f4\u63a5\u64cd\u7eb5\u4e86\u8fdc\u7a0b\u5bf9\u8c61\u3002<\/p>\n\n<p><strong>\u9002\u7528\u6027<\/strong><\/p>\n\n<p>1) \u8fdc\u7a0b\u4ee3\u7406\uff08Remote  Proxy\uff09\u4e3a\u4e00\u4e2a\u4f4d\u4e8e\u4e0d\u540c\u7684\u5730\u5740\u7a7a\u95f4\u7684\u5bf9\u8c61\u63d0\u4f9b\u4e00\u4e2a\u672c\u5730\u7684\u4ee3\u7406\u5bf9\u8c61\u3002\u8fd9\u4e2a\u4e0d\u540c\u7684\u5730\u5740\u7a7a\u95f4\u53ef\u4ee5\u662f\u5728\u540c\u4e00\u53f0\u4e3b\u673a\u4e2d\uff0c\u4e5f\u53ef\u662f\u5728\u53e6\u4e00\u53f0\u4e3b\u673a\u4e2d\uff0c\u8fdc\u7a0b\u4ee3\u7406\u53c8\u53eb\u505a\u5927\u4f7f(Ambassador)<\/p>\n\n<p>2) \u865a\u62df\u4ee3\u7406\uff08Virtual Proxy\uff09\u6839\u636e\u9700\u8981\u521b\u5efa\u5f00\u9500\u5f88\u5927\u7684\u5bf9\u8c61\u3002\u5982\u679c\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u8d44\u6e90\u6d88\u8017\u8f83\u5927\u7684\u5bf9\u8c61\uff0c\u5148\u521b\u5efa\u4e00\u4e2a\u6d88\u8017\u76f8\u5bf9\u8f83\u5c0f\u7684\u5bf9\u8c61\u6765\u8868\u793a\uff0c\u771f\u5b9e\u5bf9\u8c61\u53ea\u5728\u9700\u8981\u65f6\u624d\u4f1a\u88ab\u771f\u6b63\u521b\u5efa\u3002<\/p>\n\n<p>3) \u4fdd\u62a4\u4ee3\u7406\uff08Protection Proxy\uff09\u63a7\u5236\u5bf9\u539f\u59cb\u5bf9\u8c61\u7684\u8bbf\u95ee\u3002\u4fdd\u62a4\u4ee3\u7406\u7528\u4e8e\u5bf9\u8c61\u5e94\u8be5\u6709\u4e0d\u540c\u7684\u8bbf\u95ee\u6743\u9650\u7684\u65f6\u5019\u3002<\/p>\n\n<p>4) \u667a\u80fd\u6307\u5f15\uff08Smart Reference\uff09\u53d6\u4ee3\u4e86\u7b80\u5355\u7684\u6307\u9488\uff0c\u5b83\u5728\u8bbf\u95ee\u5bf9\u8c61\u65f6\u6267\u884c\u4e00\u4e9b\u9644\u52a0\u64cd\u4f5c\u3002<\/p>\n\n<p>5) Copy-on-Write\u4ee3\u7406\uff1a\u5b83\u662f\u865a\u62df\u4ee3\u7406\u7684\u4e00\u79cd\uff0c\u628a\u590d\u5236\uff08\u514b\u9686\uff09\u64cd\u4f5c\u5ef6\u8fdf\u5230\u53ea\u6709\u5728\u5ba2\u6237\u7aef\u771f\u6b63\u9700\u8981\u65f6\u624d\u6267\u884c\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u5bf9\u8c61\u7684\u6df1\u514b\u9686\u662f\u4e00\u4e2a\u5f00\u9500\u8f83\u5927\u7684\u64cd\u4f5c\uff0cCopy-on-Write\u4ee3\u7406\u53ef\u4ee5\u8ba9\u8fd9\u4e2a\u64cd\u4f5c\u5ef6\u8fdf\uff0c\u53ea\u6709\u5bf9\u8c61\u88ab\u7528\u5230\u7684\u65f6\u5019\u624d\u88ab\u514b\u9686\u3002<\/p>\n\n<p><strong>\u7ed3\u6784<\/strong><\/p>\n\n<p><img src=\"http:\/\/my.csdn.net\/uploads\/201205\/07\/1336371130_8874.jpg\" alt=\"proxy\" \/><\/p>\n\n<p><strong>\u6548\u679c<\/strong><\/p>\n\n<p>\u5c01\u88c5\u5b9e\u73b0\u7ec6\u8282\uff0c\u53ea\u66b4\u9732\u6570\u636e\u62bd\u8c61<\/p>\n\n<p>\u5ef6\u8fdf\u52a0\u8f7d<\/p>\n\n<p>\u6743\u9650\u63a7\u5236<\/p>\n\n<p><strong>\u5e94\u7528<\/strong><\/p>\n\n<p>java.lang.reflect.Proxy<\/p>\n\n<p>RMI<\/p>\n\n<p><strong>\u76f8\u5173<\/strong><\/p>\n\n<p>\u4e0e\u88c5\u9970\u8005\u5f88\u7c7b\u4f3c\uff0c\u7136\u800c\u76ee\u7684\u4e0d\u540c\uff0c\u88c5\u9970\u8005\u589e\u52a0\u884c\u4e3a\uff0c\u4ee3\u7406\u6a21\u5f0f\u63a7\u5236\u8bbf\u95ee<\/p>\n\n<h2 id=\"\u5916\u89c2\u6a21\u5f0f\">\u5916\u89c2\u6a21\u5f0f<\/h2>\n\n<p><strong>\u5b9a\u4e49<\/strong><\/p>\n\n<p>\u63d0\u4f9b\u4e86\u4e00\u4e2a\u7edf\u4e00\u7684\u63a5\u53e3\uff0c\u7528\u6765\u8bbf\u95ee\u5b50\u7cfb\u7edf\u4e2d\u7684\u4e00\u7fa4\u63a5\u53e3\u3002\u5916\u89c2\u5b9a\u4e49\u4e86\u4e00\u4e2a\u9ad8\u5c42\u63a5\u53e3\uff0c\u8ba9\u5b50\u7cfb\u7edf\u66f4\u5bb9\u6613\u4f7f\u7528\u3002<\/p>\n\n<p><strong>\u6848\u4f8b<\/strong><\/p>\n\n<p>\u7a0b\u5e8f\u7531\u591a\u4e2a\u5b50\u7cfb\u7edf\u8054\u5408\u8d77\u6765\u5de5\u4f5c\uff0c\u800c\u4e14\u8fd9\u4e9b\u5b50\u7ec4\u4ef6\u9700\u8981\u4f7f\u7528\u8005\u81ea\u5df1\u7ec4\u88c5\uff0c\u8fd9\u6837\u4f7f\u7528\u8d77\u6765\u4f1a\u5f88\u590d\u6742\uff0c\u800c\u4e14\u5ba2\u6237\u4e0e\u5b50\u7ec4\u4ef6\u8026\u5408\u8f83\u9ad8\u3002<\/p>\n\n<p>\u89e3\u51b3\u65b9\u6848\uff0c\u63d0\u4f9b\u4e00\u5957\u7b80\u5316\u7684\u63a5\u53e3\uff0c\u5ba2\u6237\u7aef\u53ef\u4ee5\u76f4\u63a5\u64cd\u4f5c\u6b64\u63a5\u53e3\uff0c\u800c\u65e0\u9700\u7406\u4f1a\u590d\u6742\u7684\u7cfb\u7edf\u7ed3\u6784\u3002<\/p>\n\n<p><strong>\u9002\u7528\u6027<\/strong><\/p>\n\n<p>\u5f53\u9700\u8981\u4e3a\u4e00\u4e2a\u590d\u6742\u5b50\u7cfb\u7edf\u63d0\u4f9b\u4e00\u4e2a\u7b80\u5355\u63a5\u53e3\u65f6\u3002<\/p>\n\n<p><strong>\u7ed3\u6784<\/strong><\/p>\n\n<p><img src=\"http:\/\/my.csdn.net\/uploads\/201207\/05\/1341473411_7539.JPG\" alt=\"facade\" \/><\/p>\n\n<p><strong>\u6548\u679c<\/strong><\/p>\n\n<p>\u5bf9\u5ba2\u6237\u5c4f\u853d\u5b50\u7cfb\u7edf\u7ec4\u4ef6\uff0c\u51cf\u5c11\u4e86\u5ba2\u6237\u5904\u7406\u7684\u5bf9\u8c61\u6570\u76ee\u5e76\u4f7f\u5f97\u5b50\u7cfb\u7edf\u4f7f\u7528\u8d77\u6765\u66f4\u52a0\u5bb9\u6613\u3002<\/p>\n\n<p>\u53ea\u662f\u63d0\u4f9b\u4e86\u4e00\u4e2a\u8bbf\u95ee\u5b50\u7cfb\u7edf\u7684\u7edf\u4e00\u5165\u53e3\uff0c\u5e76\u4e0d\u5f71\u54cd\u7528\u6237\u76f4\u63a5\u4f7f\u7528\u5b50\u7cfb\u7edf\u7c7b\u3002<\/p>\n\n<p>\u4e0d\u80fd\u5f88\u597d\u5730\u9650\u5236\u5ba2\u6237\u4f7f\u7528\u5b50\u7cfb\u7edf\u7c7b<\/p>\n\n<p>\u589e\u52a0\u65b0\u7684\u5b50\u7cfb\u7edf\u53ef\u80fd\u9700\u8981\u4fee\u6539\u5916\u89c2\u7c7b\u6216\u5ba2\u6237\u7aef\u7684\u6e90\u4ee3\u7801\uff0c\u8fdd\u80cc\u4e86\u201c\u5f00\u95ed\u539f\u5219\u201d\u3002<\/p>\n\n<p><strong>\u5e94\u7528<\/strong><\/p>\n\n<p>java.lang.Class<\/p>\n\n<p><strong>\u76f8\u5173<\/strong><\/p>\n\n<p>\u9002\u914d\u5668\u6a21\u5f0f<\/p>\n\n<h2 id=\"\u7ec4\u5408\u6a21\u5f0f\">\u7ec4\u5408\u6a21\u5f0f<\/h2>\n\n<p><strong>\u5b9a\u4e49<\/strong><\/p>\n\n<p>\u5141\u8bb8\u4f60\u5c06\u5bf9\u8c61\u7ec4\u5408\u6210\u6811\u5f62\u7ed3\u6784\u6765\u8868\u73b0\u201c\u6574\u4f53\/\u90e8\u5206\u201d\u5c42\u6b21\u7ed3\u6784\u3002\u7ec4\u5408\u80fd\u8ba9\u5ba2\u6237\u4ee5\u4e00\u81f4\u7684\u65b9\u5f0f\u5904\u7406\u4e2a\u522b\u5bf9\u8c61\u4ee5\u53ca\u5bf9\u8c61\u7ec4\u5408\u3002<\/p>\n\n<p><strong>\u6848\u4f8b<\/strong><\/p>\n\n<p>\u83dc\u5355\u4e2d\u6709\u5f88\u591a\u9053\u83dc\uff0c\u800c\u4e14\u5176\u4e2d\u751c\u70b9\u662f\u4e2a\u5b50\u83dc\u5355\uff0c\u73b0\u5728\u9700\u8981\u6253\u5370\u6574\u4e2a\u83dc\u5355\u3002<\/p>\n\n<p>\u89e3\u51b3\u65b9\u6848\u662f\uff1a\u5c06\u5b50\u83dc\u5355\u4e0e\u603b\u9876\u5c42\u83dc\u5355\u7684\u63a5\u53e3\u7edf\u4e00\u8d77\u6765\uff0c\u90fd\u4e3aMenu\u7c7b\u578b\uff0c\u5927Menu\u5185\u90e8\u7ef4\u62a4\u83dc\u5355\u5217\u8868\u4ee5\u53ca\u5b50Menu\u3002<\/p>\n\n<p><strong>\u9002\u7528\u6027<\/strong><\/p>\n\n<p>\u60f3\u8868\u793a\u5bf9\u8c61\u7684\u90e8\u5206-\u6574\u4f53\u5c42\u6b21\u7ed3\u6784<\/p>\n\n<p>\u5e0c\u671b\u7528\u6237\u5ffd\u7565\u7ec4\u5408\u5bf9\u8c61\u4e0e\u5355\u4e2a\u5bf9\u8c61\u7684\u4e0d\u540c\uff0c\u7528\u6237\u5c06\u7edf\u4e00\u5730\u4f7f\u7528\u7ec4\u5408\u7ed3\u6784\u4e2d\u7684\u6240\u6709\u5bf9\u8c61\u3002<\/p>\n\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u867d\u7136\u901a\u5e38\u60c5\u51b5\u4e0b\u7ec4\u5408\u6a21\u5f0f\u4ee5\u6811\u5f62\u7ed3\u6784\u4f53\u73b0\uff0c\u4f46\u5176\u5b9e\u4e0d\u662f\u4e00\u56de\u4e8b\uff0c\u7ec4\u5408\u6a21\u5f0f\u62e5\u6709\u66f4\u62bd\u8c61\u7684\u8bed\u4e49\uff0c\u5b83\u662f\u4e00\u79cd\u6574\u4f53\u4e0e\u90e8\u5206\u4e00\u81f4\u7684\u62bd\u8c61\u3002<\/p>\n\n<p><strong>\u7ed3\u6784<\/strong><\/p>\n\n<p><img src=\"http:\/\/my.csdn.net\/uploads\/201205\/03\/1336015104_5713.jpg\" alt=\"composive\" \/><\/p>\n\n<p><strong>\u6548\u679c<\/strong><\/p>\n\n<p>\u5b9a\u4e49\u4e86\u5305\u542b\u57fa\u672c\u5bf9\u8c61\u548c\u7ec4\u5408\u5bf9\u8c61\u7684\u7c7b\u5c42\u6b21\u7ed3\u6784 \u57fa\u672c\u5bf9\u8c61\u53ef\u4ee5\u88ab\u7ec4\u5408\u6210\u66f4\u590d\u6742\u7684\u7ec4\u5408\u5bf9\u8c61\uff0c\u800c\u8fd9\u4e2a\u7ec4\u5408\u5bf9\u8c61\u53c8\u53ef\u4ee5\u88ab\u7ec4\u5408\uff0c\u8fd9\u6837\u4e0d\u65ad\u7684\u9012\u5f52\u4e0b\u53bb\u3002<\/p>\n\n<p>\u7b80\u5316\u5ba2\u6237\u4ee3\u7801 \u5ba2\u6237\u53ef\u4ee5\u4e00\u81f4\u5730\u4f7f\u7528\u7ec4\u5408\u7ed3\u6784\u548c\u5355\u4e2a\u5bf9\u8c61\u3002<\/p>\n\n<p>\u4f7f\u5f97\u66f4\u5bb9\u6613\u589e\u52a0\u65b0\u7c7b\u578b\u7684\u7ec4\u4ef6<\/p>\n\n<p>\u66f4\u96be\u4ee5\u6392\u9664\u7279\u5b9a\u7c7b\u578b\u7684\u7ec4\u4ef6<\/p>\n\n<p><strong>\u5e94\u7528<\/strong><\/p>\n\n<p>javax.swing.JComponent# add(Component)<\/p>\n\n<p>java.awt.Container# add(Component)<\/p>\n\n<p>java.util.Map# putAll(Map)<\/p>\n\n<p>java.util.List# addAll(Collection)<\/p>\n\n<p>java.util.Set# addAll(Collection)<\/p>\n\n<p><strong>\u76f8\u5173<\/strong><\/p>\n\n<p>\u53ef\u4e0e\u8fed\u4ee3\u5668\u6a21\u5f0f\u642d\u914d\u4f7f\u7528<\/p>\n\n","pubDate":"Sun, 22 Jun 2014 00:00:00 +0000","link":"https:\/\/bit-ranger.github.io\/blog\/common\/design-pattern\/","guid":"https:\/\/bit-ranger.github.io\/blog\/common\/design-pattern\/","category":["design","pattern","\u8bbe\u8ba1\u6a21\u5f0f","\u539f\u5219","\u9762\u5411\u5bf9\u8c61","common"]},{"title":"Java Concurrent","description":"<ul id=\"markdown-toc\">\n  <li><a href=\"#\u7ebf\u7a0b\u5b89\u5168\u7684\u7c7b\" id=\"markdown-toc-\u7ebf\u7a0b\u5b89\u5168\u7684\u7c7b\">\u7ebf\u7a0b\u5b89\u5168\u7684\u7c7b<\/a><\/li>\n  <li><a href=\"#thread\" id=\"markdown-toc-thread\">Thread<\/a>    <ul>\n      <li><a href=\"#interrupt\" id=\"markdown-toc-interrupt\">interrupt<\/a><\/li>\n      <li><a href=\"#join\" id=\"markdown-toc-join\">join<\/a><\/li>\n      <li><a href=\"#\u540c\u6b65\" id=\"markdown-toc-\u540c\u6b65\">\u540c\u6b65<\/a><\/li>\n      <li><a href=\"#\u9501\" id=\"markdown-toc-\u9501\">\u9501<\/a><\/li>\n    <\/ul>\n  <\/li>\n  <li><a href=\"#\u7ebf\u7a0b\u5b89\u5168\u96c6\u5408\" id=\"markdown-toc-\u7ebf\u7a0b\u5b89\u5168\u96c6\u5408\">\u7ebf\u7a0b\u5b89\u5168\u96c6\u5408<\/a>    <ul>\n      <li><a href=\"#copyonwrite\" id=\"markdown-toc-copyonwrite\">CopyOnWrite<\/a><\/li>\n      <li><a href=\"#concurrenthashmap\" id=\"markdown-toc-concurrenthashmap\">ConcurrentHashMap<\/a><\/li>\n      <li><a href=\"#\u961f\u5217\" id=\"markdown-toc-\u961f\u5217\">\u961f\u5217<\/a><\/li>\n      <li><a href=\"#\u5f31\u4e00\u81f4\u7684\u8fed\u4ee3\u5668\" id=\"markdown-toc-\u5f31\u4e00\u81f4\u7684\u8fed\u4ee3\u5668\">\u5f31\u4e00\u81f4\u7684\u8fed\u4ee3\u5668<\/a><\/li>\n    <\/ul>\n  <\/li>\n  <li><a href=\"#\u7ebf\u7a0b\u6c60\" id=\"markdown-toc-\u7ebf\u7a0b\u6c60\">\u7ebf\u7a0b\u6c60<\/a><\/li>\n  <li><a href=\"#executor-\u6846\u67b6\" id=\"markdown-toc-executor-\u6846\u67b6\">Executor \u6846\u67b6<\/a>    <ul>\n      <li><a href=\"#executorservice\" id=\"markdown-toc-executorservice\">ExecutorService<\/a><\/li>\n      <li><a href=\"#scheduledexecutorservice\" id=\"markdown-toc-scheduledexecutorservice\">ScheduledExecutorService<\/a><\/li>\n      <li><a href=\"#executors\" id=\"markdown-toc-executors\">Executors<\/a><\/li>\n      <li><a href=\"#\u5b9a\u5236-threadpoolexecutor\" id=\"markdown-toc-\u5b9a\u5236-threadpoolexecutor\">\u5b9a\u5236 ThreadPoolExecutor<\/a><\/li>\n      <li><a href=\"#\u9700\u8981\u7279\u522b\u8003\u8651\u7684\u95ee\u9898\" id=\"markdown-toc-\u9700\u8981\u7279\u522b\u8003\u8651\u7684\u95ee\u9898\">\u9700\u8981\u7279\u522b\u8003\u8651\u7684\u95ee\u9898<\/a><\/li>\n      <li><a href=\"#\u8c03\u6574\u7ebf\u7a0b\u6c60\" id=\"markdown-toc-\u8c03\u6574\u7ebf\u7a0b\u6c60\">\u8c03\u6574\u7ebf\u7a0b\u6c60<\/a><\/li>\n      <li><a href=\"#future-\u63a5\u53e3\" id=\"markdown-toc-future-\u63a5\u53e3\">Future \u63a5\u53e3<\/a><\/li>\n      <li><a href=\"#\u4f7f\u7528-future-\u6784\u5efa\u7f13\u5b58\" id=\"markdown-toc-\u4f7f\u7528-future-\u6784\u5efa\u7f13\u5b58\">\u4f7f\u7528 Future \u6784\u5efa\u7f13\u5b58<\/a><\/li>\n      <li><a href=\"#completionservice\" id=\"markdown-toc-completionservice\">CompletionService<\/a><\/li>\n      <li><a href=\"#forkjoin\" id=\"markdown-toc-forkjoin\">Fork\/Join<\/a><\/li>\n    <\/ul>\n  <\/li>\n  <li><a href=\"#\u540c\u6b65\u5de5\u5177\" id=\"markdown-toc-\u540c\u6b65\u5de5\u5177\">\u540c\u6b65\u5de5\u5177<\/a>    <ul>\n      <li><a href=\"#semaphore\" id=\"markdown-toc-semaphore\">Semaphore<\/a><\/li>\n      <li><a href=\"#\u4e92\u65a5\" id=\"markdown-toc-\u4e92\u65a5\">\u4e92\u65a5<\/a><\/li>\n      <li><a href=\"#cyclicbarrier\" id=\"markdown-toc-cyclicbarrier\">CyclicBarrier<\/a><\/li>\n      <li><a href=\"#countdownlatch\" id=\"markdown-toc-countdownlatch\">CountdownLatch<\/a><\/li>\n      <li><a href=\"#exchanger\" id=\"markdown-toc-exchanger\">Exchanger<\/a><\/li>\n    <\/ul>\n  <\/li>\n  <li><a href=\"#lock\u5de5\u5177\" id=\"markdown-toc-lock\u5de5\u5177\">Lock\u5de5\u5177<\/a>    <ul>\n      <li><a href=\"#reentrantlock\" id=\"markdown-toc-reentrantlock\">ReentrantLock<\/a><\/li>\n      <li><a href=\"#condition\" id=\"markdown-toc-condition\">Condition<\/a><\/li>\n      <li><a href=\"#readwritelock\" id=\"markdown-toc-readwritelock\">ReadWriteLock<\/a><\/li>\n    <\/ul>\n  <\/li>\n  <li><a href=\"#\u539f\u5b50\u53d8\u91cf\" id=\"markdown-toc-\u539f\u5b50\u53d8\u91cf\">\u539f\u5b50\u53d8\u91cf<\/a><\/li>\n  <li><a href=\"#\u5e76\u53d1\u968f\u673a\u6570\" id=\"markdown-toc-\u5e76\u53d1\u968f\u673a\u6570\">\u5e76\u53d1\u968f\u673a\u6570<\/a><\/li>\n  <li><a href=\"#\u6027\u80fd\u4e0e\u53ef\u4f38\u7f29\u6027\" id=\"markdown-toc-\u6027\u80fd\u4e0e\u53ef\u4f38\u7f29\u6027\">\u6027\u80fd\u4e0e\u53ef\u4f38\u7f29\u6027<\/a><\/li>\n<\/ul>\n\n<p>\u7ebf\u7a0b\u62e5\u6709\u901a\u8fc7\u7a0b\u5e8f\u8fd0\u884c\u7684\u72ec\u7acb\u7684\u5e76\u53d1\u8def\u5f84\uff0c\u5e76\u4e14\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u6709\u81ea\u5df1\u7684\u7a0b\u5e8f\u8ba1\u6570\u5668\uff0c\u79f0\u4e3a\u5806\u6808\u548c\u672c\u5730\u53d8\u91cf\u3002\u7ebf\u7a0b\u5b58\u5728\u4e8e\u8fdb\u7a0b\u4e2d\uff0c\u5b83\u4eec\u4e0e\u540c\u4e00\u8fdb\u7a0b\u5185\u7684\u5176\u4ed6\u7ebf\u7a0b\u5171\u4eab\u5185\u5b58\u3001\u6587\u4ef6\u53e5\u67c4\u4ee5\u53ca\u8fdb\u7a0b\u72b6\u6001\u3002<\/p>\n\n<hr \/>\n\n<p>JDK 5.0 \u4e2d\u7684\u5e76\u53d1\u6539\u8fdb\u53ef\u4ee5\u5206\u4e3a\u4e09\u7ec4\uff1a<\/p>\n\n<ul>\n  <li>\n    <p>JVM \u7ea7\u522b\u66f4\u6539\u3002\u5927\u591a\u6570\u73b0\u4ee3\u5904\u7406\u5668\u5bf9\u5e76\u53d1\u5bf9\u67d0\u4e00\u786c\u4ef6\u7ea7\u522b\u63d0\u4f9b\u652f\u6301\uff0c\u901a\u5e38\u4ee5 <strong>compare-and-swap<\/strong> \uff08CAS\uff09\u6307\u4ee4\u5f62\u5f0f\u3002CAS \u662f\u4e00\u79cd\u4f4e\u7ea7\u522b\u7684\u3001\u7ec6\u7c92\u5ea6\u7684\u6280\u672f\uff0c\u5b83\u5141\u8bb8\u591a\u4e2a\u7ebf\u7a0b\u66f4\u65b0\u4e00\u4e2a\u5185\u5b58\u4f4d\u7f6e\uff0c\u540c\u65f6\u80fd\u591f\u68c0\u6d4b\u5176\u4ed6\u7ebf\u7a0b\u7684\u51b2\u7a81\u5e76\u8fdb\u884c\u6062\u590d\u3002\u5b83\u662f\u8bb8\u591a\u9ad8\u6027\u80fd\u5e76\u53d1\u7b97\u6cd5\u7684\u57fa\u7840\u3002\u5728 JDK 5.0 \u4e4b\u524d\uff0cJava \u8bed\u8a00\u4e2d\u7528\u4e8e\u534f\u8c03\u7ebf\u7a0b\u4e4b\u95f4\u7684\u8bbf\u95ee\u7684\u60df\u4e00\u539f\u8bed\u662f\u540c\u6b65\uff0c\u540c\u6b65\u662f\u66f4\u91cd\u91cf\u7ea7\u548c\u7c97\u7c92\u5ea6\u7684\u3002\u516c\u5f00 CAS \u53ef\u4ee5\u5f00\u53d1\u9ad8\u5ea6\u53ef\u4f38\u7f29\u7684\u5e76\u53d1 Java \u7c7b\u3002\u8fd9\u4e9b\u66f4\u6539\u4e3b\u8981\u7531 JDK \u5e93\u7c7b\u4f7f\u7528\uff0c\u800c\u4e0d\u662f\u7531\u5f00\u53d1\u4eba\u5458\u4f7f\u7528\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u4f4e\u7ea7\u5b9e\u7528\u7a0b\u5e8f\u7c7b \u2013 <code class=\"language-plaintext highlighter-rouge\">\u9501\u5b9a<\/code>\u548c<code class=\"language-plaintext highlighter-rouge\">\u539f\u5b50\u7c7b<\/code>\u3002\u4f7f\u7528 CAS \u4f5c\u4e3a\u5e76\u53d1\u539f\u8bed\uff0c<strong>ReentrantLock<\/strong> \u7c7b\u63d0\u4f9b\u4e0e synchronized \u539f\u8bed\u76f8\u540c\u7684\u9501\u5b9a\u548c\u5185\u5b58\u8bed\u4e49\uff0c\u7136\u800c\u8fd9\u6837\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u9501\u5b9a\uff08\u5982\u8ba1\u65f6\u7684\u9501\u5b9a\u7b49\u5f85\u3001\u9501\u5b9a\u8f6e\u8be2\u548c\u53ef\u4e2d\u65ad\u7684\u9501\u5b9a\u7b49\u5f85\uff09\u548c\u63d0\u4f9b\u66f4\u597d\u7684\u53ef\u4f38\u7f29\u6027\uff08\u7ade\u4e89\u65f6\u7684\u9ad8\u6027\u80fd\uff09\u3002\u5927\u591a\u6570\u5f00\u53d1\u4eba\u5458\u5c06\u4e0d\u518d\u76f4\u63a5\u4f7f\u7528 ReentrantLock \u7c7b\uff0c\u800c\u662f\u4f7f\u7528\u5728 ReentrantLock \u7c7b\u4e0a\u6784\u5efa\u7684\u9ad8\u7ea7\u7c7b\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u9ad8\u7ea7\u5b9e\u7528\u7a0b\u5e8f\u7c7b\u3002\u8fd9\u4e9b\u7c7b\u5b9e\u73b0\u5e76\u53d1\u6784\u5efa\u5757\uff0c\u6bcf\u4e2a\u8ba1\u7b97\u673a\u79d1\u5b66\u6587\u672c\u4e2d\u90fd\u4f1a\u8bb2\u8ff0\u8fd9\u4e9b\u7c7b \u2013 <code class=\"language-plaintext highlighter-rouge\">\u4fe1\u53f7<\/code>\u3001<code class=\"language-plaintext highlighter-rouge\">\u4e92\u65a5<\/code>\u3001<code class=\"language-plaintext highlighter-rouge\">\u95e9\u9501<\/code>\u3001<code class=\"language-plaintext highlighter-rouge\">\u5c4f\u969c<\/code>\u3001<code class=\"language-plaintext highlighter-rouge\">\u4ea4\u6362\u7a0b\u5e8f<\/code>\u3001<code class=\"language-plaintext highlighter-rouge\">\u7ebf\u7a0b\u6c60<\/code>\u548c<code class=\"language-plaintext highlighter-rouge\">\u7ebf\u7a0b\u5b89\u5168\u96c6\u5408\u7c7b<\/code>\u7b49\u3002\u5927\u90e8\u5206\u5f00\u53d1\u4eba\u5458\u90fd\u53ef\u4ee5\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7528\u8fd9\u4e9b\u7c7b\u6765\u66ff\u6362\u8bb8\u591a\u540c\u6b65\u3001wait() \u548c notify() \u7684\u4f7f\u7528\uff0c\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\u3001\u53ef\u8bfb\u6027\u548c\u6b63\u786e\u6027\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<hr \/>\n\n<h1 id=\"\u7ebf\u7a0b\u5b89\u5168\u7684\u7c7b\">\u7ebf\u7a0b\u5b89\u5168\u7684\u7c7b<\/h1>\n\n<ul>\n  <li>\n    <p>\u9996\u5148\u5b83\u5fc5\u987b\u5728\u5355\u7ebf\u7a0b\u73af\u5883\u4e2d\u6b63\u786e\u8fd0\u884c\u3002\u5982\u679c\u6b63\u786e\u5b9e\u73b0\u4e86\u7c7b\uff0c\u90a3\u4e48\u8bf4\u660e\u5b83\u7b26\u5408\u89c4\u8303\uff0c\u5bf9\u8be5\u7c7b\u7684\u5bf9\u8c61\u7684\u4efb\u4f55\u987a\u5e8f\u7684\u64cd\u4f5c\uff08\u516c\u5171\u5b57\u6bb5\u7684\u8bfb\u5199\u3001\u516c\u5171\u65b9\u6cd5\u7684\u8c03\u7528\uff09\u90fd\u4e0d\u5e94\u8be5\uff1a<\/p>\n\n    <ul>\n      <li>\n        <p>\u4f7f\u5bf9\u8c61\u5904\u4e8e\u65e0\u6548\u72b6\u6001\uff1b<\/p>\n      <\/li>\n      <li>\n        <p>\u89c2\u5bdf\u5904\u4e8e\u65e0\u6548\u72b6\u6001\u7684\u5bf9\u8c61\uff1b<\/p>\n      <\/li>\n      <li>\n        <p>\u8fdd\u53cd\u7c7b\u7684\u4efb\u4f55\u53d8\u91cf\u3001\u524d\u7f6e\u6761\u4ef6\u6216\u540e\u7f6e\u6761\u4ef6\u3002<\/p>\n      <\/li>\n    <\/ul>\n  <\/li>\n  <li>\n    <p>\u800c\u4e14\uff0c\u8981\u6210\u4e3a\u7ebf\u7a0b\u5b89\u5168\u7684\u7c7b\uff0c\u5728\u4ece\u591a\u4e2a\u7ebf\u7a0b\u8bbf\u95ee\u65f6\uff0c\u5b83\u5fc5\u987b\u7ee7\u7eed\u6b63\u786e\u8fd0\u884c\uff0c\u800c\u4e0d\u7ba1\u8fd0\u884c\u65f6\u73af\u5883\u6267\u884c\u90a3\u4e9b\u7ebf\u7a0b\u7684\u8c03\u5ea6\u548c\u4ea4\u53c9\uff0c\u4e14\u65e0\u9700\u5bf9\u90e8\u5206\u8c03\u7528\u4ee3\u7801\u6267\u884c\u4efb\u4f55\u5176\u4ed6\u540c\u6b65\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u5982\u679c\u6ca1\u6709\u7ebf\u7a0b\u4e4b\u95f4\u7684\u67d0\u79cd\u660e\u786e\u534f\u8c03\uff0c\u6bd4\u5982\u9501\u5b9a\uff0c\u8fd0\u884c\u65f6\u53ef\u4ee5\u968f\u610f\u5728\u9700\u8981\u65f6\u5728\u591a\u7ebf\u7a0b\u4e2d\u4ea4\u53c9\u64cd\u4f5c\u6267\u884c\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u5728\u5e76\u53d1\u7f16\u7a0b\u4e2d\uff0c\u4e00\u79cd\u88ab\u666e\u904d\u8ba4\u53ef\u7684\u539f\u5219\u5c31\u662f\uff1a\u5c3d\u53ef\u80fd\u7684\u4f7f\u7528<strong>\u4e0d\u53ef\u53d8\u5bf9\u8c61<\/strong>\u6765\u521b\u5efa\u7b80\u5355\u3001\u53ef\u9760\u7684\u4ee3\u7801\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h1 id=\"thread\">Thread<\/h1>\n\n<ul>\n  <li>\n    <p>\u4efb\u4f55\u4e00\u4e2a\u65f6\u523b\uff0c\u5bf9\u8c61\u7684\u63a7\u5236\u6743\uff08monitor\uff09\u53ea\u80fd\u88ab\u4e00\u4e2a\u7ebf\u7a0b\u62e5\u6709\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u65e0\u8bba\u662f\u6267\u884c\u5bf9\u8c61\u7684<code class=\"language-plaintext highlighter-rouge\">wait<\/code>\u3001<code class=\"language-plaintext highlighter-rouge\">notify<\/code>\u8fd8\u662f<code class=\"language-plaintext highlighter-rouge\">notifyAll<\/code>\u65b9\u6cd5\uff0c\u5fc5\u987b\u4fdd\u8bc1\u5f53\u524d\u8fd0\u884c\u7684\u7ebf\u7a0b\u53d6\u5f97\u4e86\u8be5\u5bf9\u8c61\u7684\u63a7\u5236\u6743\uff08monitor\uff09\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u5982\u679c\u5728\u6ca1\u6709\u63a7\u5236\u6743\u7684\u7ebf\u7a0b\u91cc\u6267\u884c\u5bf9\u8c61\u7684\u4ee5\u4e0a\u4e09\u79cd\u65b9\u6cd5\uff0c\u5c31\u4f1a\u62a5java.lang.IllegalMonitorStateException\u5f02\u5e38\u3002<\/p>\n  <\/li>\n  <li>\n    <p>JVM\u57fa\u4e8e\u591a\u7ebf\u7a0b\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4e0d\u80fd\u4fdd\u8bc1\u8fd0\u884c\u65f6\u7ebf\u7a0b\u7684\u65f6\u5e8f\u6027\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"interrupt\">interrupt<\/h2>\n\n<ul>\n  <li>\n    <p>\u5f53\u8c03\u7528<code class=\"language-plaintext highlighter-rouge\">th.interrput()<\/code>\u7684\u65f6\u5019\uff0c\u7ebf\u7a0bth\u7684\u4e2d\u65ad\u72b6\u6001(interrupted status) \u4f1a\u88ab\u7f6e\u4f4d\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7Thread.currentThread().isInterrupted() \u6765\u68c0\u67e5\u8fd9\u4e2a\u5e03\u5c14\u578b\u7684\u4e2d\u65ad\u72b6\u6001\u3002<\/p>\n  <\/li>\n  <li>\n    <p><strong>\u6ca1\u6709\u4efb\u4f55\u8bed\u8a00\u65b9\u9762\u7684\u9700\u6c42\u8981\u6c42\u4e00\u4e2a\u88ab\u4e2d\u65ad\u7684\u7a0b\u5e8f\u5e94\u8be5\u7ec8\u6b62<\/strong>\u3002\u4e2d\u65ad\u4e00\u4e2a\u7ebf\u7a0b\u53ea\u662f\u4e3a\u4e86\u5f15\u8d77\u8be5\u7ebf\u7a0b\u7684\u6ce8\u610f\uff0c\u88ab\u4e2d\u65ad\u7ebf\u7a0b\u53ef\u4ee5\u51b3\u5b9a\u5982\u4f55\u5e94\u5bf9\u4e2d\u65ad\u3002\u8fd9\u8bf4\u660einterrupt\u4e2d\u65ad\u7684\u662f\u7ebf\u7a0b\u7684\u67d0\u4e00\u90e8\u5206\u4e1a\u52a1\u903b\u8f91\uff0c\u524d\u63d0\u662f\u7ebf\u7a0b\u9700\u8981\u68c0\u67e5\u81ea\u5df1\u7684\u4e2d\u65ad\u72b6\u6001(isInterrupted())\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u5f53th\u88ab\u963b\u585e\u7684\u65f6\u5019\uff0c\u6bd4\u5982\u88ab<code class=\"language-plaintext highlighter-rouge\">Object.wait<\/code>, <code class=\"language-plaintext highlighter-rouge\">Thread.join<\/code>\u548c<code class=\"language-plaintext highlighter-rouge\">Thread.sleep<\/code>\u4e09\u79cd\u65b9\u6cd5\u4e4b\u4e00\u963b\u585e\u65f6, \u8c03\u7528\u5b83\u7684interrput()\u65b9\u6cd5\uff0c\u53ef\u60f3\u800c\u77e5\uff0c\u6ca1\u6709\u5360\u7528CPU\u8fd0\u884c\u7684\u7ebf\u7a0b\u662f\u4e0d\u53ef\u80fd\u7ed9\u81ea\u5df1\u7684\u4e2d\u65ad\u72b6\u6001\u7f6e\u4f4d\u7684, \u8fd9\u5c31\u4f1a\u4ea7\u751f\u4e00\u4e2aInterruptedException\u5f02\u5e38\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"join\">join<\/h2>\n\n<ul>\n  <li>\n    <p>join\u65b9\u6cd5\u53ef\u4ee5\u8ba9\u4e00\u4e2a\u7ebf\u7a0b<strong>\u7b49\u5f85<\/strong>\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u6267\u884c\u5b8c\u6210\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u82e5t\u662f\u4e00\u4e2a\u6b63\u5728\u6267\u884c\u7684Thread\u5bf9\u8c61\uff0ct.join() \u5c06\u4f1a\u4f7f\u5f53\u524d\u7ebf\u7a0b\u6682\u505c\u6267\u884c\u5e76\u7b49\u5f85t\u6267\u884c\u5b8c\u6210\u3002\u91cd\u8f7d\u7684join()\u65b9\u6cd5\u53ef\u4ee5\u8ba9\u5f00\u53d1\u8005\u81ea\u5b9a\u4e49\u7b49\u5f85\u5468\u671f\u3002\u7136\u800c\uff0c\u548csleep()\u65b9\u6cd5\u4e00\u6837join()\u65b9\u6cd5\u4f9d\u8d56\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u7684\u65f6\u95f4\u5904\u7406\u673a\u5236\uff0c\u4f60\u4e0d\u80fd\u5047\u5b9ajoin()\u65b9\u6cd5\u5c06\u4f1a\u7cbe\u786e\u7684\u7b49\u5f85\u4f60\u6240\u5b9a\u4e49\u7684\u65f6\u957f\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u5982\u540csleep()\u65b9\u6cd5\uff0cjoin()\u65b9\u6cd5\u54cd\u5e94\u4e2d\u65ad\u5e76\u5728\u4e2d\u65ad\u65f6\u629b\u51faInterruptedException\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"\u540c\u6b65\">\u540c\u6b65<\/h2>\n\n<ul>\n  <li>\n    <p>\u540c\u6b65\u7684\u6784\u9020\u65b9\u6cd5\u6ca1\u6709\u610f\u4e49\uff0c\u56e0\u4e3a\u5f53\u8fd9\u4e2a\u5bf9\u8c61\u88ab\u521b\u5efa\u7684\u65f6\u5019\uff0c\u53ea\u6709\u521b\u5efa\u5bf9\u8c61\u7684\u7ebf\u7a0b\u80fd\u8bbf\u95ee\u5b83\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u9759\u6001\u65b9\u6cd5\u662f\u548c\u7c7b\uff08\u800c\u4e0d\u662f\u5bf9\u8c61\uff09\u76f8\u5173\u7684\uff0c\u6240\u4ee5\u7ebf\u7a0b\u4f1a\u8bf7\u6c42\u7c7b\u5bf9\u8c61(Class Object)\u7684\u5185\u90e8\u9501\u3002\u56e0\u6b64\u7528\u6765\u63a7\u5236\u7c7b\u7684<strong>\u9759\u6001\u57df<\/strong>\u8bbf\u95ee\u7684\u9501\u4e0d\u540c\u4e8e\u63a7\u5236<strong>\u5bf9\u8c61<\/strong>\u8bbf\u95ee\u7684\u9501\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u5982\u679c\u7c7b\u4e2d\u7684\u4e24\u4e2a\u57df\u9700\u8981\u540c\u6b65\u8bbf\u95ee\uff0c\u4f46\u662f\u4e24\u4e2a\u57df\u6ca1\u6709\u4ec0\u4e48\u5173\u8054\uff0c\u90a3\u4e48\u53ef\u4ee5\u4e3a\u4e24\u4e2a\u57df\u4e2a\u521b\u5efa\u4e00\u4e2a\u79c1\u6709\u7684\u9501\u5bf9\u8c61\uff0c\u4f7f\u4e24\u4e2a\u57df\u80fd\u5206\u522b\u540c\u6b65\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"\u9501\">\u9501<\/h2>\n\n<ul>\n  <li>\n    <p>\u6b7b\u9501\u63cf\u8ff0\u4e86\u8fd9\u6837\u4e00\u79cd\u60c5\u666f\uff0c\u4e24\u4e2a\u6216\u591a\u4e2a\u7ebf\u7a0b\u6c38\u4e45\u963b\u585e\uff0c\u4e92\u76f8\u7b49\u5f85\u5bf9\u65b9\u91ca\u653e\u8d44\u6e90\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u9965\u997f\u662f\u6307\u5f53\u4e00\u4e2a\u7ebf\u7a0b\u4e0d\u80fd\u6b63\u5e38\u7684\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u5e76\u4e14\u4e0d\u80fd\u6b63\u5e38\u6267\u884c\u7684\u60c5\u51b5\u3002\u8fd9\u901a\u5e38\u5728\u5171\u4eab\u8d44\u6e90\u88ab\u5176\u4ed6\u201c\u8d2a\u5fc3\u201d\u7684\u7ebf\u7a0b\u957f\u671f\u5360\u7528\u65f6\u53d1\u751f<\/p>\n  <\/li>\n  <li>\n    <p>\u4e00\u4e2a\u7ebf\u7a0b\u901a\u5e38\u4f1a\u6709\u4f1a\u54cd\u5e94\u5176\u4ed6\u7ebf\u7a0b\u7684\u6d3b\u52a8\u3002\u5982\u679c\u5176\u4ed6\u7ebf\u7a0b\u4e5f\u4f1a\u54cd\u5e94\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u7684\u6d3b\u52a8\uff0c\u90a3\u4e48\u5c31\u6709\u53ef\u80fd\u53d1\u751f\u6d3b\u9501\u3002\u540c\u6b7b\u9501\u4e00\u6837\uff0c\u53d1\u751f\u6d3b\u9501\u7684\u7ebf\u7a0b\u65e0\u6cd5\u7ee7\u7eed\u6267\u884c, \u7136\u800c\u7ebf\u7a0b\u5e76\u6ca1\u6709\u963b\u585e, \u4ed6\u4eec\u5728\u5fd9\u4e8e\u54cd\u5e94\u5bf9\u65b9\u65e0\u6cd5\u6062\u590d\u5de5\u4f5c\u3002<\/p>\n  <\/li>\n  <li>\n    <p>wait\u65b9\u6cd5\uff0c\u91ca\u653e\u9501\u5e76\u6302\u8d77<\/p>\n  <\/li>\n  <li>\n    <p>\u5982\u679c\u5728\u4e00\u4e2a\u6267\u884c\u5e8f\u5217\u4e2d\uff0c\u9700\u8981\u786e\u5b9a\u5bf9\u8c61\u7684\u72b6\u6001\uff0c\u90a3\u4e48\u67d0\u4e2a\u7ebf\u7a0b\u5728\u6267\u884c\u8fd9\u4e2a\u5e8f\u5217\u65f6\uff0c\u9700\u8981\u83b7\u5f97\u6240\u6709\u8fd9\u4e9b\u5bf9\u8c61\u7684\u9501\uff08\u5982\u4e00\u6765\u4e00\u56de\u7684\u76f8\u4e92\u97a0\u8eac\uff0c\u5fc5\u987b\u4fdd\u8bc1\u4e0d\u4f1a\u540c\u65f6\u97a0\u8eac\u4e5f\u4e0d\u4f1a\u540c\u65f6\u9759\u6b62\uff09<\/p>\n  <\/li>\n<\/ul>\n\n<h1 id=\"\u7ebf\u7a0b\u5b89\u5168\u96c6\u5408\">\u7ebf\u7a0b\u5b89\u5168\u96c6\u5408<\/h1>\n\n<ul>\n  <li>\n    <p>java.util.concurrent \u5305\u6dfb\u52a0\u4e86\u591a\u4e2a\u65b0\u7684\u7ebf\u7a0b\u5b89\u5168\u96c6\u5408\u7c7b <code class=\"language-plaintext highlighter-rouge\">ConcurrentHashMap<\/code>, <code class=\"language-plaintext highlighter-rouge\">CopyOnWriteArrayList<\/code>, <code class=\"language-plaintext highlighter-rouge\">CopyOnWriteArraySet<\/code><\/p>\n  <\/li>\n  <li>\n    <p>JDK 5.0 \u8fd8\u63d0\u4f9b\u4e86\u4e24\u4e2a\u65b0\u96c6\u5408\u63a5\u53e3 \u2013 <code class=\"language-plaintext highlighter-rouge\">Queue<\/code> \u548c <code class=\"language-plaintext highlighter-rouge\">BlockingQueue<\/code>\u3002Queue \u63a5\u53e3\u4e0e List \u7c7b\u4f3c\uff0c\u4f46\u5b83\u53ea\u5141\u8bb8\u4ece\u540e\u9762\u63d2\u5165\uff0c\u4ece\u524d\u9762\u5220\u9664\u3002BlockingQueue\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5148\u8fdb\u5148\u51fa\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5f53\u4f60\u5c1d\u8bd5\u5f80\u6ee1\u961f\u5217\u4e2d\u6dfb\u52a0\u5143\u7d20\uff0c\u6216\u8005\u4ece\u7a7a\u961f\u5217\u4e2d\u83b7\u53d6\u5143\u7d20\u65f6\uff0c\u5c06\u4f1a\u963b\u585e\u6216\u8005\u8d85\u65f6\u3002<\/p>\n  <\/li>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">ConcurrentMap<\/code>\u662fjava.util.Map\u7684\u5b50\u63a5\u53e3\uff0c\u5b9a\u4e49\u4e86\u4e00\u4e9b\u6709\u7528\u7684\u539f\u5b50\u64cd\u4f5c\u3002\u79fb\u9664\u6216\u8005\u66ff\u6362\u952e\u503c\u5bf9\u7684\u64cd\u4f5c\u53ea\u6709\u5f53key\u5b58\u5728\u65f6\u624d\u80fd\u8fdb\u884c\uff0c\u800c\u65b0\u589e\u64cd\u4f5c\u53ea\u6709\u5f53key\u4e0d\u5b58\u5728\u65f6\u624d\u80fd\u8fdb\u884c, \u4f7f\u8fd9\u4e9b\u64cd\u4f5c\u539f\u5b50\u5316\uff0c\u53ef\u4ee5\u907f\u514d\u540c\u6b65\u3002ConcurrentMap\u7684\u6807\u51c6\u5b9e\u73b0\u662f<code class=\"language-plaintext highlighter-rouge\">ConcurrentHashMap<\/code>\uff0c\u5b83\u662f<code class=\"language-plaintext highlighter-rouge\">HashMap<\/code>\u7684\u5e76\u53d1\u6a21\u5f0f\u3002<\/p>\n  <\/li>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">ConcurrentNavigableMap<\/code>\u662fConcurrentMap\u7684\u5b50\u63a5\u53e3\uff0c\u652f\u6301\u8fd1\u4f3c\u5339\u914d\u3002ConcurrentNavigableMap\u7684\u6807\u51c6\u5b9e\u73b0\u662f<code class=\"language-plaintext highlighter-rouge\">ConcurrentSkipListMap<\/code>\uff0c\u5b83\u662f<code class=\"language-plaintext highlighter-rouge\">TreeMap<\/code>\u7684\u5e76\u53d1\u6a21\u5f0f\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u6240\u6709\u8fd9\u4e9b\u96c6\u5408\uff0c\u901a\u8fc7 \u5728\u96c6\u5408\u91cc\u65b0\u589e\u5bf9\u8c61\u548c\u8bbf\u95ee\u6216\u79fb\u9664\u5bf9\u8c61\u7684\u64cd\u4f5c\u4e4b\u95f4\uff0c\u5b9a\u4e49\u4e00\u4e2a<code class=\"language-plaintext highlighter-rouge\">happens-before<\/code>\u7684\u5173\u7cfb\uff0c\u6765\u5e2e\u52a9\u7a0b\u5e8f\u5458\u907f\u514d\u5185\u5b58\u4e00\u81f4\u6027\u9519\u8bef\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"copyonwrite\">CopyOnWrite<\/h2>\n\n<ul>\n  <li>\n    <p>Vector \u7684\u5e38\u89c1\u5e94\u7528\u662f\u5b58\u50a8\u901a\u8fc7\u7ec4\u4ef6\u6ce8\u518c\u7684\u76d1\u542c\u5668\u7684\u5217\u8868\u3002\u5f53\u53d1\u751f\u9002\u5408\u7684\u4e8b\u4ef6\u65f6\uff0c\u8be5\u7ec4\u4ef6\u5c06\u5728\u76d1\u542c\u5668\u7684\u5217\u8868\u4e2d\u8fed\u4ee3\uff0c\u8c03\u7528\u6bcf\u4e2a\u76d1\u542c\u5668\u3002\u4e3a\u4e86\u9632\u6b62ConcurrentModificationException\uff0c\u8fed\u4ee3\u7ebf\u7a0b\u5fc5\u987b\u590d\u5236\u5217\u8868\u6216\u9501\u5b9a\u5217\u8868\uff0c\u4ee5\u4fbf\u8fdb\u884c\u6574\u4f53\u8fed\u4ee3\uff0c\u800c\u8fd9\u4e24\u79cd\u60c5\u51b5\u90fd\u9700\u8981\u5927\u91cf\u7684\u6027\u80fd\u6210\u672c\u3002<\/p>\n  <\/li>\n  <li>\n    <p>CopyOnWriteArrayList\u53caCopyOnWriteArraySet \u7c7b\u901a\u8fc7\u6bcf\u6b21\u6dfb\u52a0\u6216\u5220\u9664\u5143\u7d20\u65f6\u521b\u5efa\u6570\u7ec4\u7684\u65b0\u526f\u672c\uff0c\u907f\u514d\u4e86\u8fd9\u4e2a\u95ee\u9898\uff0c\u4f46\u662f\u8fdb\u884c\u4e2d\u7684\u8fed\u4ee3\u4fdd\u6301\u5bf9\u521b\u5efa\u8fed\u4ee3\u5668\u65f6\u7684\u526f\u672c\u8fdb\u884c\u64cd\u4f5c\u3002\u867d\u7136\u590d\u5236\u4e5f\u4f1a\u6709\u4e00\u4e9b\u6210\u672c\uff0c\u4f46\u662f\u5728\u8bb8\u591a\u60c5\u51b5\u4e0b\uff0c\u8fed\u4ee3\u8981\u6bd4\u4fee\u6539\u591a\u5f97\u591a\uff0c\u5728\u8fd9\u4e9b\u60c5\u51b5\u4e0b\uff0c\u5199\u5165\u65f6\u590d\u5236\u8981\u6bd4\u5176\u4ed6\u5907\u7528\u65b9\u6cd5\u5177\u6709\u66f4\u597d\u7684\u6027\u80fd\u548c\u5e76\u53d1\u6027\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"concurrenthashmap\">ConcurrentHashMap<\/h2>\n\n<ul>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">Hashtable<\/code> \u548c <code class=\"language-plaintext highlighter-rouge\">synchronizedMap<\/code> \u6240\u91c7\u53d6\u7684\u83b7\u5f97\u540c\u6b65\u7684\u7b80\u5355\u65b9\u6cd5\uff08\u540c\u6b65 Hashtable \u6216\u8005\u540c\u6b65 Map \u5c01\u88c5\u5668\u5bf9\u8c61\u4e2d\u7684\u6bcf\u4e2a\u65b9\u6cd5\uff09\u6709\u4e24\u4e2a\u4e3b\u8981\u7684\u4e0d\u8db3\uff1a<\/p>\n\n    <ul>\n      <li>\n        <p>\u7b2c\u4e00\uff0c\u8fd9\u79cd\u65b9\u6cd5\u5bf9\u4e8e\u53ef\u4f38\u7f29\u6027\u662f\u4e00\u79cd\u969c\u788d\uff0c\u56e0\u4e3a\u4e00\u6b21\u53ea\u80fd\u6709\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u8bbf\u95ee hash \u8868\uff1b<\/p>\n      <\/li>\n      <li>\n        <p>\u7b2c\u4e8c\uff0c\u8fd9\u6837\u4ecd\u4e0d\u8db3\u4ee5\u63d0\u4f9b\u771f\u6b63\u7684\u7ebf\u7a0b\u5b89\u5168\u6027\uff0c\u8bb8\u591a\u516c\u7528\u7684\u6df7\u5408\u64cd\u4f5c\u4ecd\u7136\u9700\u8981\u989d\u5916\u7684\u540c\u6b65\u3002\u867d\u7136\u8bf8\u5982 get() \u548c put() \u4e4b\u7c7b\u7684\u7b80\u5355\u64cd\u4f5c\u53ef\u4ee5\u5728\u4e0d\u9700\u8981\u989d\u5916\u540c\u6b65\u7684\u60c5\u51b5\u4e0b\u5b89\u5168\u5730\u5b8c\u6210\uff0c\u4f46\u8fd8\u662f\u6709\u4e00\u4e9b\u516c\u7528\u7684\u64cd\u4f5c\u5e8f\u5217\uff0c\u4f8b\u5982\u8fed\u4ee3\u6216\u8005 put-if-absent\uff08\u7a7a\u5219\u653e\u5165\uff09\uff0c\u9700\u8981\u5916\u90e8\u7684\u540c\u6b65\uff0c\u4ee5\u907f\u514d\u6570\u636e\u4e89\u7528\u3002<\/p>\n      <\/li>\n    <\/ul>\n  <\/li>\n  <li>\n    <p>\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c<code class=\"language-plaintext highlighter-rouge\">ConcurrentHashMap<\/code> \u662f Hashtable\u6216 Collections.synchronizedMap(new HashMap()) \u7684\u7b80\u5355\u66ff\u6362\u3002\u7136\u800c\uff0c\u5176\u4e2d\u6709\u4e00\u4e2a\u663e\u8457\u4e0d\u540c\uff0c\u5373 ConcurrentHashMap \u5b9e\u4f8b\u4e2d\u7684\u540c\u6b65<strong>\u4e0d\u9501\u5b9a<\/strong>Map\u8fdb\u884c\u72ec\u5360\u4f7f\u7528, \u5b9e\u9645\u4e0a\uff0c\u6ca1\u6709\u529e\u6cd5\u9501\u5b9a ConcurrentHashMap \u8fdb\u884c\u72ec\u5360\u4f7f\u7528\uff0c\u5b83\u88ab\u8bbe\u8ba1\u7528\u4e8e\u8fdb\u884c\u5e76\u53d1\u8bbf\u95ee\u3002\u4e3a\u4e86\u4f7f\u96c6\u5408\u4e0d\u88ab\u9501\u5b9a\u8fdb\u884c\u72ec\u5360\u4f7f\u7528\uff0c\u8fd8\u63d0\u4f9b\u4e86\u516c\u7528\u7684\u6df7\u5408\u64cd\u4f5c\u7684\u5176\u4ed6\uff08\u539f\u5b50\uff09\u65b9\u6cd5\uff0c\u5982 <strong>put-if-absent<\/strong>\u3002<\/p>\n  <\/li>\n  <li>\n    <p>ConcurrentHashMap \u8fd4\u56de\u7684\u8fed\u4ee3\u5668\u662f\u5f31\u4e00\u81f4\u7684\uff0c\u610f\u5473\u7740\u5b83\u4eec\u5c06\u4e0d\u629b\u51faConcurrentModificationException \uff0c\u5c06\u8fdb\u884c \u201c\u5408\u7406\u64cd\u4f5c\u201d \u6765\u53cd\u6620\u8fed\u4ee3\u8fc7\u7a0b\u4e2d\u5176\u4ed6\u7ebf\u7a0b\u5bf9 Map \u7684\u4fee\u6539\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"\u961f\u5217\">\u961f\u5217<\/h2>\n\n<ul>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">Queue<\/code> \u63a5\u53e3\u6bd4 List \u7b80\u5355\u5f97\u591a\uff0c\u4ec5\u5305\u542b put() \u548c take() \u65b9\u6cd5\uff0c\u5e76\u5141\u8bb8\u6bd4 LinkedList \u66f4\u6709\u6548\u7684\u5b9e\u73b0\u3002<\/p>\n  <\/li>\n  <li>\n    <p>Queue \u63a5\u53e3\u8fd8\u5141\u8bb8\u5b9e\u73b0\u6765\u786e\u5b9a\u5b58\u50a8\u5143\u7d20\u7684\u987a\u5e8f\u3002<code class=\"language-plaintext highlighter-rouge\">ConcurrentLinkedQueue<\/code> \u7c7b\u5b9e\u73b0\u5148\u8fdb\u5148\u51fa\uff08first-in-first-out\uff0cFIFO\uff09\u961f\u5217\u3002<code class=\"language-plaintext highlighter-rouge\">PriorityQueue<\/code> \u7c7b\u5b9e\u73b0\u4f18\u5148\u7ea7\u961f\u5217\uff08\u4e5f\u79f0\u4e3a\u5806\uff09\uff0c\u5b83\u5bf9\u4e8e\u6784\u5efa\u8c03\u5ea6\u5668\u975e\u5e38\u6709\u7528\uff0c\u8c03\u5ea6\u5668\u5fc5\u987b\u6309\u4f18\u5148\u7ea7\u6216\u9884\u671f\u7684\u6267\u884c\u65f6\u95f4\u6267\u884c\u4efb\u52a1\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u5b9e\u73b0 Queue \u7684\u7c7b\u662f\uff1a<\/p>\n\n    <ul>\n      <li>\n        <p><code class=\"language-plaintext highlighter-rouge\">LinkedList<\/code> \u5df2\u7ecf\u8fdb\u884c\u4e86\u6539\u8fdb\u6765\u5b9e\u73b0 Queue\u3002<\/p>\n      <\/li>\n      <li>\n        <p><code class=\"language-plaintext highlighter-rouge\">PriorityQueue<\/code> \u975e\u7ebf\u7a0b\u5b89\u5168\u7684\u4f18\u5148\u7ea7\u961f\u5217\uff08\u5806\uff09\u5b9e\u73b0\uff0c\u6839\u636e\u81ea\u7136\u987a\u5e8f\u6216\u6bd4\u8f83\u5668\u8fd4\u56de\u5143\u7d20\u3002<\/p>\n      <\/li>\n      <li>\n        <p><code class=\"language-plaintext highlighter-rouge\">ConcurrentLinkedQueue<\/code> \u5feb\u901f\u3001\u7ebf\u7a0b\u5b89\u5168\u7684\u3001\u65e0\u963b\u585e FIFO \u961f\u5217\u3002<\/p>\n      <\/li>\n    <\/ul>\n  <\/li>\n<\/ul>\n\n<h2 id=\"\u5f31\u4e00\u81f4\u7684\u8fed\u4ee3\u5668\">\u5f31\u4e00\u81f4\u7684\u8fed\u4ee3\u5668<\/h2>\n\n<ul>\n  <li>\n    <p>java.util \u5305\u4e2d\u7684\u96c6\u5408\u7c7b\u90fd\u8fd4\u56de <code class=\"language-plaintext highlighter-rouge\">fail-fast<\/code> \u8fed\u4ee3\u5668\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u4eec\u5047\u8bbe\u7ebf\u7a0b\u5728\u96c6\u5408\u5185\u5bb9\u4e2d\u8fdb\u884c\u8fed\u4ee3\u65f6\uff0c\u96c6\u5408\u4e0d\u4f1a\u66f4\u6539\u5b83\u7684\u5185\u5bb9\u3002\u5982\u679c fail-fast \u8fed\u4ee3\u5668\u68c0\u6d4b\u5230\u5728\u8fed\u4ee3\u8fc7\u7a0b\u4e2d\u8fdb\u884c\u4e86\u66f4\u6539\u64cd\u4f5c\uff0c\u90a3\u4e48\u5b83\u4f1a\u629b\u51fa <strong>ConcurrentModificationException<\/strong>\uff0c\u8fd9\u662f\u4e0d\u53ef\u63a7\u5f02\u5e38\u3002<\/p>\n  <\/li>\n  <li>\n    <p>java.util.concurrent \u96c6\u5408\u8fd4\u56de\u7684\u8fed\u4ee3\u5668\u79f0\u4e3a\u5f31\u4e00\u81f4\u7684\uff08<code class=\"language-plaintext highlighter-rouge\">weakly consistent<\/code>\uff09\u8fed\u4ee3\u5668\u3002\u5bf9\u4e8e\u8fd9\u4e9b\u7c7b\uff0c\u5982\u679c\u5143\u7d20\u81ea\u4ece\u8fed\u4ee3\u5f00\u59cb\u5df2\u7ecf\u5220\u9664\uff0c\u4e14\u5c1a\u672a\u7531 next() \u65b9\u6cd5\u8fd4\u56de\uff0c\u90a3\u4e48\u5b83\u5c06\u4e0d\u8fd4\u56de\u5230\u8c03\u7528\u8005\u3002\u5982\u679c\u5143\u7d20\u81ea\u8fed\u4ee3\u5f00\u59cb\u5df2\u7ecf\u6dfb\u52a0\uff0c\u90a3\u4e48\u5b83\u53ef\u80fd\u8fd4\u56de\u8c03\u7528\u8005\uff0c\u4e5f\u53ef\u80fd\u4e0d\u8fd4\u56de\u3002\u5728\u4e00\u6b21\u8fed\u4ee3\u4e2d\uff0c\u65e0\u8bba\u5982\u4f55\u66f4\u6539\u5e95\u5c42\u96c6\u5408\uff0c\u5143\u7d20\u4e0d\u4f1a\u88ab\u8fd4\u56de\u4e24\u6b21\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h1 id=\"\u7ebf\u7a0b\u6c60\">\u7ebf\u7a0b\u6c60<\/h1>\n\n<ul>\n  <li>\n    <p>\u7ba1\u7406\u4e00\u5927\u7ec4\u5c0f\u4efb\u52a1\u7684\u6807\u51c6\u673a\u5236\u662f<strong>\u7ec4\u5408\u5de5\u4f5c\u961f\u5217<\/strong>\u548c<strong>\u7ebf\u7a0b\u6c60<\/strong>\u3002\u5de5\u4f5c\u961f\u5217\u5c31\u662f\u8981\u5904\u7406\u7684\u4efb\u52a1\u7684\u961f\u5217\uff0c\u524d\u9762\u63cf\u8ff0\u7684 Queue \u7c7b\u5b8c\u5168\u9002\u5408\u3002\u7ebf\u7a0b\u6c60\u662f\u7ebf\u7a0b\u7684\u96c6\u5408\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u63d0\u53d6\u516c\u7528\u5de5\u4f5c\u961f\u5217\u3002\u5f53\u4e00\u4e2a\u5de5\u4f5c\u7ebf\u7a0b\u5b8c\u6210\u4efb\u52a1\u5904\u7406\u540e\uff0c\u5b83\u4f1a\u8fd4\u56de\u961f\u5217\uff0c\u67e5\u770b\u662f\u5426\u6709\u5176\u4ed6\u4efb\u52a1\u9700\u8981\u5904\u7406\u3002\u5982\u679c\u6709\uff0c\u5b83\u4f1a\u8f6c\u79fb\u5230\u4e0b\u4e00\u4e2a\u4efb\u52a1\uff0c\u5e76\u5f00\u59cb\u5904\u7406\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u7ebf\u7a0b\u6c60\u4e3a\u7ebf\u7a0b\u751f\u547d\u5468\u671f\u95f4\u63a5\u6210\u672c\u95ee\u9898\u548c\u8d44\u6e90\u5d29\u6e83\u95ee\u9898\u63d0\u4f9b\u4e86\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n    <ul>\n      <li>\u901a\u8fc7\u5bf9\u591a\u4e2a\u4efb\u52a1\u91cd\u65b0\u4f7f\u7528\u7ebf\u7a0b\uff0c\u521b\u5efa\u7ebf\u7a0b\u7684\u95f4\u63a5\u6210\u672c\u5c06\u5206\u5e03\u5230\u591a\u4e2a\u4efb\u52a1\u4e2d\u3002<\/li>\n      <li>\u4f5c\u4e3a\u4e00\u79cd\u989d\u5916\u597d\u5904\uff0c\u56e0\u4e3a\u8bf7\u6c42\u5230\u8fbe\u65f6\uff0c\u7ebf\u7a0b\u5df2\u7ecf\u5b58\u5728\uff0c\u4ece\u800c\u53ef\u4ee5\u6d88\u9664\u7531\u521b\u5efa\u7ebf\u7a0b\u5f15\u8d77\u7684\u5ef6\u8fdf, \u56e0\u6b64\uff0c\u53ef\u4ee5\u7acb\u5373\u5904\u7406\u8bf7\u6c42\uff0c\u4f7f\u5e94\u7528\u7a0b\u5e8f\u66f4\u6613\u54cd\u5e94\u3002<\/li>\n      <li>\u800c\u4e14\uff0c\u901a\u8fc7\u6b63\u786e\u8c03\u6574\u7ebf\u7a0b\u6c60\u4e2d\u7684\u7ebf\u7a0b\u6570\uff0c\u53ef\u4ee5\u5f3a\u5236\u8d85\u51fa\u7279\u5b9a\u9650\u5236\u7684\u4efb\u4f55\u8bf7\u6c42\u7b49\u5f85\uff0c\u76f4\u5230\u6709\u7ebf\u7a0b\u53ef\u4ee5\u5904\u7406\u5b83\uff0c\u5b83\u4eec\u7b49\u5f85\u65f6\u6240\u6d88\u8017\u7684\u8d44\u6e90\u8981\u5c11\u4e8e\u4f7f\u7528\u989d\u5916\u7ebf\u7a0b\u6240\u6d88\u8017\u7684\u8d44\u6e90\uff0c\u8fd9\u6837\u53ef\u4ee5\u9632\u6b62\u8d44\u6e90\u5d29\u6e83\u3002<\/li>\n    <\/ul>\n  <\/li>\n<\/ul>\n\n<h1 id=\"executor-\u6846\u67b6\">Executor \u6846\u67b6<\/h1>\n\n<ul>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">Executor<\/code> \u63a5\u53e3\u5173\u6ce8\u4efb\u52a1\u63d0\u4ea4\uff0c\u786e\u5b9a\u6267\u884c\u7b56\u7565\u3002\u8fd9\u4f7f\u5728\u90e8\u7f72\u65f6\u8c03\u6574\u6267\u884c\u7b56\u7565\uff08\u961f\u5217\u9650\u5236\u3001\u6c60\u5927\u5c0f\u3001\u4f18\u5148\u7ea7\u6392\u5217\u7b49\u7b49\uff09\u66f4\u52a0\u5bb9\u6613\uff0c\u66f4\u6539\u7684\u4ee3\u7801\u6700\u5c11\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u5927\u591a\u6570 Executor \u5b9e\u73b0\u7c7b\u8fd8\u5b9e\u73b0 <code class=\"language-plaintext highlighter-rouge\">ExecutorService<\/code>\u63a5\u53e3\uff0cExecutorService\u662fExecutor\u7684\u5b50\u63a5\u53e3\uff0c\u5b83\u8fd8\u7ba1\u7406\u6267\u884c\u670d\u52a1\u7684\u751f\u547d\u5468\u671f\u3002\u8fd9\u4f7f\u5b83\u4eec\u66f4\u6613\u4e8e\u7ba1\u7406\uff0c\u5e76\u5411\u751f\u547d\u53ef\u80fd\u6bd4\u5355\u72ec Executor \u7684\u751f\u547d\u66f4\u957f\u7684\u5e94\u7528\u7a0b\u5e8f\u63d0\u4f9b\u670d\u52a1\u3002<\/p>\n  <\/li>\n  <li>\n    <p><strong>\u6267\u884c\u7b56\u7565<\/strong>\u5b9a\u4e49\u4f55\u65f6\u5728\u54ea\u4e2a\u7ebf\u7a0b\u4e2d\u8fd0\u884c\u4efb\u52a1\uff0c\u6267\u884c\u4efb\u52a1\u53ef\u80fd\u6d88\u8017\u7684\u8d44\u6e90\u7ea7\u522b\uff08\u7ebf\u7a0b\u3001\u5185\u5b58\u7b49\u7b49\uff09\uff0c\u4ee5\u53ca\u5982\u679c\u6267\u884c\u7a0b\u5e8f\u8d85\u8f7d\u8be5\u600e\u4e48\u529e\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"executorservice\">ExecutorService<\/h2>\n\n<ul>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">ExecutorService<\/code>\u63a5\u53e3\u5728\u63d0\u4f9b\u4e86execute\u65b9\u6cd5\u7684\u540c\u65f6\uff0c\u65b0\u52a0\u4e86\u66f4\u52a0\u901a\u7528\u7684<code class=\"language-plaintext highlighter-rouge\">submit<\/code>\u65b9\u6cd5\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u901a\u8fc7submit\u65b9\u6cd5\u8fd4\u56de\u7684<code class=\"language-plaintext highlighter-rouge\">Future<\/code>\u5bf9\u8c61\u53ef\u4ee5\u8bfb\u53d6<code class=\"language-plaintext highlighter-rouge\">Callable<\/code>\u4efb\u52a1\u7684\u6267\u884c\u7ed3\u679c\uff0c\u6216\u7ba1\u7406Callable\u4efb\u52a1\u548cRunnable\u4efb\u52a1\u7684\u72b6\u6001\u3002<\/p>\n  <\/li>\n  <li>\n    <p>ExecutorService\u4e5f\u63d0\u4f9b\u4e86\u6279\u91cf\u8fd0\u884cCallable\u4efb\u52a1\u7684\u65b9\u6cd5\uff0cExecutorService\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e9b\u5173\u95ed\u6267\u884c\u5668\u7684\u65b9\u6cd5\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"scheduledexecutorservice\">ScheduledExecutorService<\/h2>\n\n<ul>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">ScheduledExecutorService<\/code>\u6269\u5c55ExecutorService\u63a5\u53e3\u5e76\u6dfb\u52a0\u4e86<code class=\"language-plaintext highlighter-rouge\">schedule<\/code>\u65b9\u6cd5\u3002\u8c03\u7528schedule\u65b9\u6cd5\u53ef\u4ee5\u5728\u6307\u5b9a\u7684\u5ef6\u65f6\u540e\u6267\u884c\u4e00\u4e2aRunnable\u6216\u8005Callable\u4efb\u52a1\u3002<\/p>\n  <\/li>\n  <li>\n    <p>ScheduledExecutorService\u63a5\u53e3\u8fd8\u5b9a\u4e49\u4e86\u6309\u7167\u6307\u5b9a\u65f6\u95f4\u95f4\u9694\u5b9a\u671f\u6267\u884c\u4efb\u52a1\u7684<code class=\"language-plaintext highlighter-rouge\">scheduleAtFixedRate<\/code>\u65b9\u6cd5\u548c<code class=\"language-plaintext highlighter-rouge\">scheduleWithFixedDelay<\/code>\u65b9\u6cd5\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"executors\">Executors<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">Executors\u7c7b<\/code>\u5305\u542b\u7528\u4e8e\u6784\u9020\u8bb8\u591a\u4e0d\u540c\u7c7b\u578b\u7684 Executor \u5b9e\u73b0\u7684\u9759\u6001\u5de5\u5382\u65b9\u6cd5\uff1a<\/p>\n\n<ul>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">newCachedThreadPool()<\/code> \u521b\u5efa\u4e0d\u9650\u5236\u5927\u5c0f\u7684\u7ebf\u7a0b\u6c60\uff0c\u4f46\u662f\u5f53\u4ee5\u524d\u521b\u5efa\u7684\u7ebf\u7a0b\u53ef\u4ee5\u4f7f\u7528\u65f6\u5c06\u91cd\u65b0\u4f7f\u7528\u90a3\u4e9b\u7ebf\u7a0b\u3002\u5982\u679c\u6ca1\u6709\u73b0\u6709\u7ebf\u7a0b\u53ef\u7528\uff0c\u5c06\u521b\u5efa\u65b0\u7684\u7ebf\u7a0b\u5e76\u5c06\u5176\u6dfb\u52a0\u5230\u6c60\u4e2d\u3002\u5df2\u6709 60 \u79d2\u949f\u672a\u88ab\u4f7f\u7528\u7684\u7ebf\u7a0b\u5c06\u5176\u7ec8\u6b62\u5e76\u4ece\u7f13\u5b58\u4e2d\u5220\u9664\u3002<\/p>\n  <\/li>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">newFixedThreadPool(int n)<\/code> \u521b\u5efa\u4e00\u4e2a\u53ef\u91cd\u7528\u56fa\u5b9a\u7ebf\u7a0b\u6570\u7684\u7ebf\u7a0b\u6c60\uff0c\u4ee5\u5171\u4eab\u7684\u65e0\u754c\u961f\u5217\u65b9\u5f0f\u6765\u8fd0\u884c\u8fd9\u4e9b\u7ebf\u7a0b\u3002\u5982\u679c\u5728\u6240\u6709\u7ebf\u7a0b\u5904\u4e8e\u6d3b\u52a8\u72b6\u6001\u65f6\u63d0\u4ea4\u9644\u52a0\u4efb\u52a1\uff0c\u5219\u5728\u6709\u53ef\u7528\u7ebf\u7a0b\u4e4b\u524d\uff0c\u9644\u52a0\u4efb\u52a1\u5c06\u5728\u961f\u5217\u4e2d\u7b49\u5f85\u3002\u5982\u679c\u5728\u5173\u95ed\u524d\u7684\u6267\u884c\u671f\u95f4\u7531\u4e8e\u5931\u8d25\u800c\u5bfc\u81f4\u4efb\u4f55\u7ebf\u7a0b\u7ec8\u6b62\uff0c\u90a3\u4e48\u4e00\u4e2a\u65b0\u7ebf\u7a0b\u5c06\u4ee3\u66ff\u5b83\u6267\u884c\u540e\u7eed\u7684\u4efb\u52a1\u3002<\/p>\n  <\/li>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">newSingleThreadExecutor()<\/code> \u521b\u5efa\u4e00\u4e2a\u5355\u7ebf\u7a0b\u7684\u7ebf\u7a0b\u6c60\u3002\u8fd9\u4e2a\u7ebf\u7a0b\u6c60\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u5728\u5de5\u4f5c\uff0c\u4e5f\u5c31\u662f\u76f8\u5f53\u4e8e\u5355\u7ebf\u7a0b\u4e32\u884c\u6267\u884c\u6240\u6709\u4efb\u52a1, \u6b64\u7ebf\u7a0b\u6c60\u4fdd\u8bc1\u6240\u6709\u4efb\u52a1\u7684\u6267\u884c\u987a\u5e8f\u6309\u7167\u4efb\u52a1\u7684\u63d0\u4ea4\u987a\u5e8f\u6267\u884c\u3002\u5982\u679c\u8fd9\u4e2a\u552f\u4e00\u7684\u7ebf\u7a0b\u56e0\u4e3a\u5f02\u5e38\u7ed3\u675f\uff0c\u90a3\u4e48\u4f1a\u6709\u4e00\u4e2a\u65b0\u7684\u7ebf\u7a0b\u6765\u66ff\u4ee3\u5b83\u3002<\/p>\n  <\/li>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">newScheduledThreadPool(int n)<\/code>  \u521b\u5efa\u4e00\u4e2a\u5927\u5c0f\u65e0\u9650\u7684\u7ebf\u7a0b\u6c60, \u6b64\u7ebf\u7a0b\u6c60\u652f\u6301\u5b9a\u65f6\u4ee5\u53ca\u5468\u671f\u6027\u6267\u884c\u4efb\u52a1\u7684\u9700\u6c42\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u5982\u679c\u4e0a\u9762\u7684\u65b9\u6cd5\u90fd\u4e0d\u6ee1\u8db3\u9700\u8981\uff0c\u53ef\u4ee5\u5c1d\u8bd5<code class=\"language-plaintext highlighter-rouge\">ThreadPoolExecutor<\/code>\u6216\u8005<code class=\"language-plaintext highlighter-rouge\">ScheduledThreadPoolExecutor<\/code>\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"\u5b9a\u5236-threadpoolexecutor\">\u5b9a\u5236 ThreadPoolExecutor<\/h2>\n\n<p>\u901a\u8fc7\u4f7f\u7528\u5305\u542b <code class=\"language-plaintext highlighter-rouge\">ThreadFactory<\/code> \u53d8\u91cf\u7684\u5de5\u5382\u65b9\u6cd5\u6216\u6784\u9020\u51fd\u6570\u7684\u7248\u672c\uff0c\u53ef\u4ee5\u5b9a\u4e49\u7ebf\u7a0b\u7684\u521b\u5efa\u3002ThreadFactory \u662f\u5de5\u5382\u5bf9\u8c61\uff0c\u5176\u6784\u9020\u6267\u884c\u7a0b\u5e8f\u8981\u4f7f\u7528\u7684\u65b0\u7ebf\u7a0b\u3002<\/p>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">DaemonThreadFactory<\/span> <span class=\"kd\">implements<\/span> <span class=\"nc\">ThreadFactory<\/span> <span class=\"o\">{<\/span>\n    <span class=\"kd\">public<\/span> <span class=\"nc\">Thread<\/span> <span class=\"nf\">newThread<\/span><span class=\"o\">(<\/span><span class=\"nc\">Runnable<\/span> <span class=\"n\">r<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"nc\">Thread<\/span> <span class=\"n\">thread<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Thread<\/span><span class=\"o\">(<\/span><span class=\"n\">r<\/span><span class=\"o\">);<\/span>\n        <span class=\"n\">thread<\/span><span class=\"o\">.<\/span><span class=\"na\">setDaemon<\/span><span class=\"o\">(<\/span><span class=\"kc\">true<\/span><span class=\"o\">);<\/span>\n        <span class=\"k\">return<\/span> <span class=\"n\">thread<\/span><span class=\"o\">;<\/span>\n    <span class=\"o\">}<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u6709\u65f6\uff0cExecutor \u4e0d\u80fd\u6267\u884c\u4efb\u52a1\uff0c\u56e0\u4e3a\u5b83\u5df2\u7ecf\u5173\u95ed\u6216\u8005\u56e0\u4e3a Executor \u4f7f\u7528\u53d7\u9650\u5236\u961f\u5217\u5b58\u50a8\u7b49\u5f85\u4efb\u52a1\uff0c\u800c\u8be5\u961f\u5217\u5df2\u6ee1\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u9700\u8981\u54a8\u8be2\u6267\u884c\u7a0b\u5e8f\u7684<code class=\"language-plaintext highlighter-rouge\">RejectedExecutionHandler<\/code> \u6765\u786e\u5b9a\u5982\u4f55\u5904\u7406\u4efb\u52a1\uff1a<\/p>\n\n<ul>\n  <li>\n    <p>\u629b\u51fa\u5f02\u5e38\uff08\u9ed8\u8ba4\u60c5\u51b5\uff09\uff0c<\/p>\n  <\/li>\n  <li>\n    <p>\u653e\u5f03\u4efb\u52a1\uff0c<\/p>\n  <\/li>\n  <li>\n    <p>\u5728\u8c03\u7528\u8005\u7684\u7ebf\u7a0b\u4e2d\u6267\u884c\u4efb\u52a1\uff0c<\/p>\n  <\/li>\n  <li>\n    <p>\u6216\u653e\u5f03\u961f\u5217\u4e2d\u6700\u65e9\u7684\u4efb\u52a1\u4ee5\u4e3a\u65b0\u4efb\u52a1\u817e\u51fa\u7a7a\u95f4\u3002<\/p>\n  <\/li>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">setRejectedExecutionHandler<\/code>\u53ef\u4ee5\u8bbe\u7f6e\u62d2\u7edd\u7684\u6267\u884c\u5904\u7406\u7a0b\u5e8f\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"\u9700\u8981\u7279\u522b\u8003\u8651\u7684\u95ee\u9898\">\u9700\u8981\u7279\u522b\u8003\u8651\u7684\u95ee\u9898<\/h2>\n\n<p>\u5982\u679c\u5e94\u7528\u7a0b\u5e8f\u5bf9\u7279\u5b9a\u6267\u884c\u7a0b\u5e8f\u8fdb\u884c\u4e86\u5047\u8bbe\uff0c\u90a3\u4e48\u5e94\u8be5\u5728 Executor \u5b9a\u4e49\u548c\u521d\u59cb\u5316\u7684\u9644\u8fd1\u5bf9\u8fd9\u4e9b\u8fdb\u884c\u8bf4\u660e\uff0c\u4ece\u800c\u4f7f\u5584\u610f\u7684\u66f4\u6539\u4e0d\u4f1a\u7834\u574f\u5e94\u7528\u7a0b\u5e8f\u7684\u6b63\u786e\u529f\u80fd\u3002<\/p>\n\n<ul>\n  <li>\n    <p>\u4e00\u4e9b\u4efb\u52a1\u53ef\u80fd\u540c\u65f6\u7b49\u5f85\u5176\u4ed6\u4efb\u52a1\u5b8c\u6210\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5f53\u7ebf\u7a0b\u6c60\u6ca1\u6709\u8db3\u591f\u7684\u7ebf\u7a0b\u65f6\uff0c\u5982\u679c\u6240\u6709\u5f53\u524d\u6267\u884c\u7684\u4efb\u52a1\u90fd\u5728\u7b49\u5f85\u53e6\u4e00\u9879\u4efb\u52a1\uff0c\u800c\u8be5\u4efb\u52a1\u56e0\u4e3a\u7ebf\u7a0b\u6c60\u5df2\u6ee1\u4e0d\u80fd\u6267\u884c\uff0c\u90a3\u4e48\u7ebf\u7a0b\u6c60\u53ef\u80fd\u4f1a\u6b7b\u9501\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u4e00\u7ec4\u7ebf\u7a0b\u5fc5\u987b\u4f5c\u4e3a\u5171\u540c\u64cd\u4f5c\u7ec4\u4e00\u8d77\u5de5\u4f5c\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u9700\u8981\u786e\u4fdd\u7ebf\u7a0b\u6c60\u80fd\u591f\u5bb9\u7eb3\u6240\u6709\u7ebf\u7a0b\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"\u8c03\u6574\u7ebf\u7a0b\u6c60\">\u8c03\u6574\u7ebf\u7a0b\u6c60<\/h2>\n\n<ul>\n  <li>\n    <p>\u5982\u679c\u7ebf\u7a0b\u6c60\u592a\u5c0f\uff0c\u8d44\u6e90\u53ef\u80fd\u4e0d\u80fd\u88ab\u5145\u5206\u5229\u7528\uff0c\u5728\u4e00\u4e9b\u4efb\u52a1\u8fd8\u5728\u5de5\u4f5c\u961f\u5217\u4e2d\u7b49\u5f85\u6267\u884c\u65f6\uff0c\u53ef\u80fd\u4f1a\u6709\u5904\u7406\u5668\u5904\u4e8e\u95f2\u7f6e\u72b6\u6001\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u53e6\u4e00\u65b9\u9762\uff0c\u5982\u679c\u7ebf\u7a0b\u6c60\u592a\u5927\uff0c\u5219\u5c06\u6709\u8bb8\u591a\u6709\u6548\u7ebf\u7a0b\uff0c\u56e0\u4e3a\u5927\u91cf\u6709\u6548\u7ebf\u7a0b\u4f7f\u7528\u5185\u5b58\uff0c\u6216\u8005\u56e0\u4e3a\u6bcf\u9879\u4efb\u52a1\u8981\u6bd4\u4f7f\u7528\u5c11\u91cf\u7ebf\u7a0b\u6709\u66f4\u591a\u4e0a\u4e0b\u6587\u5207\u6362\uff0c\u6027\u80fd\u53ef\u80fd\u4f1a\u53d7\u635f\u3002<\/p>\n  <\/li>\n  <li>\n    <p>Amdahl \u6cd5\u5219\u63d0\u4f9b\u5f88\u597d\u7684\u8fd1\u4f3c\u516c\u5f0f\u6765\u786e\u5b9a\u7ebf\u7a0b\u6c60\u7684\u5927\u5c0f\uff1a<\/p>\n  <\/li>\n<\/ul>\n\n<blockquote>\n  <p>\u7528 <code class=\"language-plaintext highlighter-rouge\">WT<\/code> \u8868\u793a\u6bcf\u9879\u4efb\u52a1\u7684\u5e73\u5747\u7b49\u5f85\u65f6\u95f4\uff0c<code class=\"language-plaintext highlighter-rouge\">ST<\/code> \u8868\u793a\u6bcf\u9879\u4efb\u52a1\u7684\u5e73\u5747\u670d\u52a1\u65f6\u95f4\uff08\u8ba1\u7b97\u65f6\u95f4\uff09\u3002\u5219 <code class=\"language-plaintext highlighter-rouge\">WT\/ST<\/code> \u662f\u6bcf\u9879\u4efb\u52a1\u7b49\u5f85\u6240\u7528\u65f6\u95f4\u7684\u767e\u5206\u6bd4\u3002\u5bf9\u4e8e N \u5904\u7406\u5668\u7cfb\u7edf\uff0c\u6c60\u4e2d\u53ef\u4ee5\u8fd1\u4f3c\u6709 <code class=\"language-plaintext highlighter-rouge\">N*(1+WT\/ST)<\/code> \u4e2a\u7ebf\u7a0b\u3002<\/p>\n<\/blockquote>\n\n<h2 id=\"future-\u63a5\u53e3\">Future \u63a5\u53e3<\/h2>\n\n<ul>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">Future<\/code> \u63a5\u53e3\u5141\u8bb8\u8868\u793a\u5df2\u7ecf\u5b8c\u6210\u7684\u4efb\u52a1\u3001\u6b63\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\u7684\u4efb\u52a1\u6216\u8005\u5c1a\u672a\u5f00\u59cb\u6267\u884c\u7684\u4efb\u52a1\u3002\u901a\u8fc7 Future \u63a5\u53e3\uff0c\u53ef\u4ee5\u5c1d\u8bd5\u53d6\u6d88\u5c1a\u672a\u5b8c\u6210\u7684\u4efb\u52a1\uff0c\u67e5\u8be2\u4efb\u52a1\u5df2\u7ecf\u5b8c\u6210\u8fd8\u662f\u53d6\u6d88\u4e86\uff0c\u4ee5\u53ca\u63d0\u53d6\uff08\u6216\u7b49\u5f85\uff09\u4efb\u52a1\u7684\u7ed3\u679c\u503c\u3002<\/p>\n  <\/li>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">FutureTask<\/code> \u7c7b\u5b9e\u73b0\u4e86 Future\uff0c\u5e76\u5305\u542b\u4e00\u4e9b\u6784\u9020\u51fd\u6570\uff0c\u5141\u8bb8\u5c06 Runnable \u6216 Callable\u548c Future \u63a5\u53e3\u5c01\u88c5\u3002\u56e0\u4e3a FutureTask \u4e5f\u5b9e\u73b0 Runnable\uff0c\u6240\u4ee5\u53ef\u4ee5\u53ea\u5c06 FutureTask \u63d0\u4f9b\u7ed9 Executor\u3002\u4e00\u4e9b\u63d0\u4ea4\u65b9\u6cd5\uff08\u5982 <code class=\"language-plaintext highlighter-rouge\">ExecutorService.submit()<\/code>\uff09\u9664\u4e86\u63d0\u4ea4\u4efb\u52a1\u4e4b\u5916\uff0c\u8fd8\u5c06\u8fd4\u56de Future \u63a5\u53e3\u3002<\/p>\n  <\/li>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">Future.get()<\/code> \u65b9\u6cd5\u68c0\u7d22\u4efb\u52a1\u8ba1\u7b97\u7684\u7ed3\u679c, \u5982\u679c\u4efb\u52a1\u5c1a\u672a\u5b8c\u6210\uff0c\u90a3\u4e48 Future.get() \u5c06\u88ab\u963b\u585e\u76f4\u5230\u4efb\u52a1\u5b8c\u6210\uff1b\u5982\u679c\u4efb\u52a1\u5df2\u7ecf\u5b8c\u6210\uff0c\u90a3\u4e48\u5b83\u5c06\u7acb\u5373\u8fd4\u56de\u7ed3\u679c; \u5982\u679c\u4efb\u52a1\u5b8c\u6210\uff0c\u4f46\u6709\u5f02\u5e38\uff0c\u5219\u629b\u51fa ExecutionException\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"\u4f7f\u7528-future-\u6784\u5efa\u7f13\u5b58\">\u4f7f\u7528 Future \u6784\u5efa\u7f13\u5b58<\/h2>\n\n<p>\u8be5\u793a\u4f8b\u5229\u7528 ConcurrentHashMap \u4e2d\u7684\u539f\u5b50 <code class=\"language-plaintext highlighter-rouge\">putIfAbsent()<\/code> \u65b9\u6cd5\uff0c\u786e\u4fdd\u4ec5\u6709\u4e00\u4e2a\u7ebf\u7a0b\u8bd5\u56fe\u8ba1\u7b97\u7ed9\u5b9a\u5173\u952e\u5b57\u7684\u503c\u3002\u5982\u679c\u5176\u4ed6\u7ebf\u7a0b\u968f\u540e\u8bf7\u6c42\u540c\u4e00\u5173\u952e\u5b57\u7684\u503c\uff0c\u5b83\u4ec5\u80fd\u7b49\u5f85\uff08\u901a\u8fc7 Future.get() \u7684\u5e2e\u52a9\uff09\u7b2c\u4e00\u4e2a\u7ebf\u7a0b\u5b8c\u6210\u3002\u56e0\u6b64\u4e24\u4e2a\u7ebf\u7a0b\u4e0d\u4f1a\u8ba1\u7b97\u76f8\u540c\u7684\u503c\u3002<\/p>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Cache<\/span><span class=\"o\">&lt;<\/span><span class=\"no\">K<\/span><span class=\"o\">,<\/span><span class=\"no\">V<\/span><span class=\"o\">&gt;<\/span> <span class=\"o\">{<\/span>\n    <span class=\"kd\">private<\/span> <span class=\"nc\">ConcurrentMap<\/span><span class=\"o\">&lt;<\/span><span class=\"no\">K<\/span><span class=\"o\">,<\/span><span class=\"nc\">FutureTask<\/span><span class=\"o\">&lt;<\/span><span class=\"no\">V<\/span><span class=\"o\">&gt;&gt;<\/span> <span class=\"n\">map<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ConcurrentHashMap<\/span><span class=\"o\">&lt;&gt;();<\/span>\n    <span class=\"kd\">private<\/span> <span class=\"nc\">Executor<\/span> <span class=\"n\">executor<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Executors<\/span><span class=\"o\">.<\/span><span class=\"na\">newFixedThreadPool<\/span><span class=\"o\">(<\/span><span class=\"mi\">8<\/span><span class=\"o\">);<\/span>\n\n    <span class=\"kd\">static<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Task<\/span><span class=\"o\">&lt;<\/span><span class=\"no\">V<\/span><span class=\"o\">&gt;<\/span> <span class=\"kd\">implements<\/span> <span class=\"nc\">Callable<\/span><span class=\"o\">&lt;<\/span><span class=\"no\">V<\/span><span class=\"o\">&gt;{<\/span>\n        <span class=\"nd\">@Override<\/span>\n        <span class=\"kd\">public<\/span> <span class=\"no\">V<\/span> <span class=\"nf\">call<\/span><span class=\"o\">()<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">Exception<\/span> <span class=\"o\">{<\/span>\n            <span class=\"k\">return<\/span> <span class=\"kc\">null<\/span><span class=\"o\">;<\/span>\n        <span class=\"o\">}<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"kd\">public<\/span> <span class=\"no\">V<\/span> <span class=\"nf\">get<\/span><span class=\"o\">(<\/span><span class=\"kd\">final<\/span> <span class=\"no\">K<\/span> <span class=\"n\">key<\/span><span class=\"o\">)<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">ExecutionException<\/span><span class=\"o\">,<\/span> <span class=\"nc\">InterruptedException<\/span> <span class=\"o\">{<\/span>\n        <span class=\"nc\">FutureTask<\/span><span class=\"o\">&lt;<\/span><span class=\"no\">V<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">ft<\/span> <span class=\"o\">=<\/span> <span class=\"n\">map<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"n\">key<\/span><span class=\"o\">);<\/span>\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">ft<\/span> <span class=\"o\">==<\/span> <span class=\"kc\">null<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n            <span class=\"n\">ft<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">FutureTask<\/span><span class=\"o\">(<\/span><span class=\"k\">new<\/span> <span class=\"nc\">Task<\/span><span class=\"o\">());<\/span>\n            <span class=\"nc\">FutureTask<\/span><span class=\"o\">&lt;<\/span><span class=\"no\">V<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">old<\/span> <span class=\"o\">=<\/span> <span class=\"n\">map<\/span><span class=\"o\">.<\/span><span class=\"na\">putIfAbsent<\/span><span class=\"o\">(<\/span><span class=\"n\">key<\/span><span class=\"o\">,<\/span> <span class=\"n\">ft<\/span><span class=\"o\">);<\/span>\n            <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">old<\/span> <span class=\"o\">==<\/span> <span class=\"kc\">null<\/span><span class=\"o\">){<\/span>\n                <span class=\"n\">executor<\/span><span class=\"o\">.<\/span><span class=\"na\">execute<\/span><span class=\"o\">(<\/span><span class=\"n\">ft<\/span><span class=\"o\">);<\/span>\n            <span class=\"o\">}<\/span><span class=\"k\">else<\/span><span class=\"o\">{<\/span>\n                <span class=\"n\">ft<\/span> <span class=\"o\">=<\/span> <span class=\"n\">old<\/span><span class=\"o\">;<\/span>\n            <span class=\"o\">}<\/span>\n        <span class=\"o\">}<\/span>\n        <span class=\"k\">return<\/span> <span class=\"n\">ft<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">();<\/span>\n    <span class=\"o\">}<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<h2 id=\"completionservice\">CompletionService<\/h2>\n\n<ul>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">CompletionService<\/code> \u5c06\u6267\u884c\u670d\u52a1\u4e0e\u7c7b\u4f3c Queue \u7684\u63a5\u53e3\u7ec4\u5408\uff0c\u4ece\u4efb\u52a1\u6267\u884c\u4e2d\u5220\u9664\u4efb\u52a1\u7ed3\u679c\u7684\u5904\u7406\u3002CompletionService \u63a5\u53e3\u5305\u542b\u7528\u6765\u63d0\u4ea4\u5c06\u8981\u6267\u884c\u7684\u4efb\u52a1\u7684 submit() \u65b9\u6cd5\u548c\u7528\u6765\u8be2\u95ee\u4e0b\u4e00\u5b8c\u6210\u4efb\u52a1\u7684 <code class=\"language-plaintext highlighter-rouge\">take()<\/code>\/<code class=\"language-plaintext highlighter-rouge\">poll()<\/code> \u65b9\u6cd5\u3002<\/p>\n  <\/li>\n  <li>\n    <p>CompletionService \u5141\u8bb8\u5e94\u7528\u7a0b\u5e8f\u7ed3\u6784\u5316\uff0c\u4f7f\u7528 <code class=\"language-plaintext highlighter-rouge\">Producer<\/code>\/<code class=\"language-plaintext highlighter-rouge\">Consumer<\/code> \u6a21\u5f0f\uff0c\u5176\u4e2d\u751f\u4ea7\u8005\u521b\u5efa\u4efb\u52a1\u5e76\u63d0\u4ea4\uff0c\u6d88\u8d39\u8005\u8bf7\u6c42\u5b8c\u6210\u4efb\u52a1\u7684\u7ed3\u679c\u5e76\u5904\u7406\u8fd9\u4e9b\u7ed3\u679c\u3002CompletionService \u63a5\u53e3\u7531 <code class=\"language-plaintext highlighter-rouge\">ExecutorCompletionService<\/code> \u7c7b\u5b9e\u73b0\uff0c\u8be5\u7c7b\u4f7f\u7528 Executor \u5904\u7406\u4efb\u52a1\u5e76\u4ece CompletionService \u5bfc\u51fa <code class=\"language-plaintext highlighter-rouge\">submit<\/code>\/<code class=\"language-plaintext highlighter-rouge\">poll<\/code>\/<code class=\"language-plaintext highlighter-rouge\">take<\/code> \u65b9\u6cd5\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u4e0b\u5217\u4ee3\u7801\u4f7f\u7528 Executor \u548c CompletionService \u6765\u542f\u52a8\u8bb8\u591a\u4efb\u52a1\uff0c\u5e76\u4f7f\u7528\u7b2c\u4e00\u4e2a\u751f\u6210\u7684\u975e\u7a7a\u7ed3\u679c\uff0c\u7136\u540e\u53d6\u6d88\u5176\u4f59\u4efb\u52a1\uff1a<\/p>\n  <\/li>\n<\/ul>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"o\">&lt;<\/span><span class=\"no\">V<\/span><span class=\"o\">&gt;<\/span> <span class=\"no\">V<\/span> <span class=\"nf\">solve<\/span><span class=\"o\">(<\/span><span class=\"nc\">Executor<\/span> <span class=\"n\">e<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Collection<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Callable<\/span><span class=\"o\">&lt;<\/span><span class=\"no\">V<\/span><span class=\"o\">&gt;&gt;<\/span> <span class=\"n\">tasks<\/span><span class=\"o\">)<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">InterruptedException<\/span><span class=\"o\">,<\/span> <span class=\"nc\">ExecutionException<\/span> <span class=\"o\">{<\/span>\n    <span class=\"nc\">CompletionService<\/span><span class=\"o\">&lt;<\/span><span class=\"no\">V<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">ecs<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ExecutorCompletionService<\/span><span class=\"o\">&lt;&gt;(<\/span><span class=\"n\">e<\/span><span class=\"o\">);<\/span>\n    <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Future<\/span><span class=\"o\">&lt;<\/span><span class=\"no\">V<\/span><span class=\"o\">&gt;&gt;<\/span> <span class=\"n\">futures<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ArrayList<\/span><span class=\"o\">&lt;&gt;();<\/span>\n    <span class=\"no\">V<\/span> <span class=\"n\">result<\/span> <span class=\"o\">=<\/span> <span class=\"kc\">null<\/span><span class=\"o\">;<\/span>\n\n    <span class=\"k\">try<\/span> <span class=\"o\">{<\/span>\n        <span class=\"n\">tasks<\/span><span class=\"o\">.<\/span><span class=\"na\">forEach<\/span><span class=\"o\">(<\/span><span class=\"n\">p<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"n\">futures<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">ecs<\/span><span class=\"o\">.<\/span><span class=\"na\">submit<\/span><span class=\"o\">(<\/span><span class=\"n\">p<\/span><span class=\"o\">)));<\/span>\n        <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span> <span class=\"n\">i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">tasks<\/span><span class=\"o\">.<\/span><span class=\"na\">size<\/span><span class=\"o\">();<\/span> <span class=\"o\">++<\/span><span class=\"n\">i<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n            <span class=\"no\">V<\/span> <span class=\"n\">r<\/span> <span class=\"o\">=<\/span> <span class=\"n\">ecs<\/span><span class=\"o\">.<\/span><span class=\"na\">take<\/span><span class=\"o\">().<\/span><span class=\"na\">get<\/span><span class=\"o\">();<\/span>\n            <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">r<\/span> <span class=\"o\">!=<\/span> <span class=\"kc\">null<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n                <span class=\"n\">result<\/span> <span class=\"o\">=<\/span> <span class=\"n\">r<\/span><span class=\"o\">;<\/span>\n                <span class=\"k\">break<\/span><span class=\"o\">;<\/span>\n            <span class=\"o\">}<\/span>\n        <span class=\"o\">}<\/span>\n    <span class=\"o\">}<\/span> <span class=\"k\">finally<\/span> <span class=\"o\">{<\/span>\n        <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Future<\/span><span class=\"o\">&lt;<\/span><span class=\"no\">V<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">f<\/span> <span class=\"o\">:<\/span> <span class=\"n\">futures<\/span><span class=\"o\">){<\/span>\n            <span class=\"n\">f<\/span><span class=\"o\">.<\/span><span class=\"na\">cancel<\/span><span class=\"o\">(<\/span><span class=\"kc\">true<\/span><span class=\"o\">);<\/span>\n        <span class=\"o\">}<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"k\">return<\/span> <span class=\"n\">result<\/span><span class=\"o\">;<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<h2 id=\"forkjoin\">Fork\/Join<\/h2>\n\n<ul>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">fork\/join<\/code>\u6846\u67b6\u662fExecutorService\u63a5\u53e3\u7684\u4e00\u79cd\u5177\u4f53\u5b9e\u73b0\uff0c\u76ee\u7684\u662f\u4e3a\u4e86\u66f4\u597d\u5730\u5229\u7528\u591a\u5904\u7406\u5668\u5e26\u6765\u7684\u597d\u5904\u3002\u5b83\u662f\u4e3a\u90a3\u4e9b\u80fd\u591f\u88ab\u9012\u5f52\u5730\u62c6\u89e3\u6210\u5b50\u4efb\u52a1\u7684\u5de5\u4f5c\u7c7b\u578b\u91cf\u8eab\u8bbe\u8ba1\u7684\u3002\u5176\u76ee\u7684\u5728\u4e8e\u80fd\u591f\u4f7f\u7528\u6240\u6709\u53ef\u7528\u7684\u8fd0\u7b97\u80fd\u529b\u6765\u63d0\u5347\u4f60\u7684\u5e94\u7528\u7684\u6027\u80fd\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u7c7b\u4f3c\u4e8eExecutorService\u63a5\u53e3\u7684\u5176\u4ed6\u5b9e\u73b0\uff0cfork\/join\u6846\u67b6\u4f1a\u5c06\u4efb\u52a1\u5206\u53d1\u7ed9\u7ebf\u7a0b\u6c60\u4e2d\u7684\u5de5\u4f5c\u7ebf\u7a0b\u3002fork\/join\u6846\u67b6\u7684\u72ec\u7279\u4e4b\u5904\u5728\u4e0e\u5b83\u4f7f\u7528\u5de5\u4f5c\u7a83\u53d6(<code class=\"language-plaintext highlighter-rouge\">work-stealing<\/code>)\u7b97\u6cd5\u3002\u5b8c\u6210\u81ea\u5df1\u7684\u5de5\u4f5c\u800c\u5904\u4e8e\u7a7a\u95f2\u7684\u5de5\u4f5c\u7ebf\u7a0b\u80fd\u591f\u4ece\u5176\u4ed6\u4ecd\u7136\u5904\u4e8e\u5fd9\u788c(busy)\u72b6\u6001\u7684\u5de5\u4f5c\u7ebf\u7a0b\u5904\u7a83\u53d6\u7b49\u5f85\u6267\u884c\u7684\u4efb\u52a1\u3002<\/p>\n  <\/li>\n  <li>\n    <p>fork\/join\u6846\u67b6\u7684\u6838\u5fc3\u662f<code class=\"language-plaintext highlighter-rouge\">ForkJoinPool<\/code>\u7c7b\uff0c\u5b83\u662f\u5bf9<code class=\"language-plaintext highlighter-rouge\">AbstractExecutorService<\/code>\u7c7b\u7684\u6269\u5c55\u3002ForkJoinPool\u5b9e\u73b0\u4e86\u5de5\u4f5c\u5077\u53d6\u7b97\u6cd5\uff0c\u5e76\u53ef\u4ee5\u6267\u884cForkJoinTask\u4efb\u52a1\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u5728Java SE 8\u4e2d\uff0cjava.util.<code class=\"language-plaintext highlighter-rouge\">Arrays<\/code>\u7c7b\u7684\u4e00\u7cfb\u5217<code class=\"language-plaintext highlighter-rouge\">parallelSort()<\/code>\u65b9\u6cd5\u5c31\u4f7f\u7528\u4e86fork\/join\u6765\u5b9e\u73b0\u3002\u8fd9\u4e9b\u65b9\u6cd5\u4e0esort()\u7cfb\u5217\u65b9\u6cd5\u5f88\u7c7b\u4f3c\uff0c\u4f46\u662f\u901a\u8fc7\u4f7f\u7528fork\/join\u6846\u67b6\uff0c\u501f\u52a9\u4e86\u5e76\u53d1\u6765\u5b8c\u6210\u76f8\u5173\u5de5\u4f5c, \u5728\u591a\u5904\u7406\u5668\u7cfb\u7edf\u4e2d\uff0c\u5bf9\u5927\u6570\u7ec4\u7684\u5e76\u884c\u6392\u5e8f\u4f1a\u6bd4\u4e32\u884c\u6392\u5e8f\u66f4\u5feb\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u5176\u4ed6\u91c7\u7528\u4e86fork\/join\u6846\u67b6\u7684\u65b9\u6cd5\u8fd8\u6709java.util.<code class=\"language-plaintext highlighter-rouge\">streams<\/code>\u5305\u4e2d\u7684\u4e00\u4e9b\u65b9\u6cd5\uff0c\u6b64\u5305\u662fJava SE 8\u53d1\u884c\u7248\u4e2dProject Lambda\u7684\u4e00\u90e8\u5206\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h1 id=\"\u540c\u6b65\u5de5\u5177\">\u540c\u6b65\u5de5\u5177<\/h1>\n\n<h2 id=\"semaphore\">Semaphore<\/h2>\n\n<ul>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">Semaphore<\/code> \u7c7b\u5b9e\u73b0\u6807\u51c6 Dijkstra \u8ba1\u6570\u4fe1\u53f7\u3002\u8ba1\u6570\u4fe1\u53f7\u53ef\u4ee5\u8ba4\u4e3a\u5177\u6709\u4e00\u5b9a\u6570\u91cf\u7684\u8bb8\u53ef\u6743\uff0c\u8be5\u8bb8\u53ef\u6743\u53ef\u4ee5\u83b7\u5f97\u6216\u91ca\u653e\u3002\u5982\u679c\u6709\u5269\u4f59\u7684\u8bb8\u53ef\u6743\uff0c<code class=\"language-plaintext highlighter-rouge\">acquire()<\/code> \u65b9\u6cd5\u5c06\u6210\u529f\uff0c\u5426\u5219\u8be5\u65b9\u6cd5\u5c06\u88ab\u963b\u585e\uff0c\u76f4\u5230\u5176\u4ed6\u7ebf\u7a0b\u91ca\u653e<code class=\"language-plaintext highlighter-rouge\">release()<\/code>\u8bb8\u53ef\u6743, \u7ebf\u7a0b\u4e00\u6b21\u53ef\u4ee5\u83b7\u5f97\u591a\u4e2a\u8bb8\u53ef\u6743\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u8ba1\u6570\u4fe1\u53f7\u53ef\u4ee5\u7528\u4e8e\u9650\u5236\u6709\u6743\u5bf9\u8d44\u6e90\u8fdb\u884c\u5e76\u53d1\u8bbf\u95ee\u7684\u7ebf\u7a0b\u6570\u3002\u8be5\u65b9\u6cd5\u5bf9\u4e8e\u5b9e\u73b0\u8d44\u6e90\u6c60\u6216\u9650\u5236 Web \u722c\u866b\uff08Web crawler\uff09\u4e2d\u7684\u8f93\u51fa socket \u8fde\u63a5\u975e\u5e38\u6709\u7528\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u6ce8\u610f\u4fe1\u53f7\u4e0d\u8ddf\u8e2a\u54ea\u4e2a\u7ebf\u7a0b\u62e5\u6709\u591a\u5c11\u8bb8\u53ef\u6743, \u8fd9\u7531\u5e94\u7528\u7a0b\u5e8f\u6765\u51b3\u5b9a\uff0c\u4ee5\u786e\u4fdd\u4f55\u65f6\u7ebf\u7a0b\u91ca\u653e\u8bb8\u53ef\u6743\uff0c\u8be5\u4fe1\u53f7\u8868\u793a\u5176\u4ed6\u7ebf\u7a0b\u62e5\u6709\u8bb8\u53ef\u6743\u6216\u8005\u6b63\u5728\u91ca\u653e\u8bb8\u53ef\u6743\uff0c\u4ee5\u53ca\u5176\u4ed6\u7ebf\u7a0b\u77e5\u9053\u5b83\u7684\u8bb8\u53ef\u6743\u5df2\u91ca\u653e\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"\u4e92\u65a5\">\u4e92\u65a5<\/h2>\n\n<ul>\n  <li>\n    <p>\u8ba1\u6570\u4fe1\u53f7\u7684\u4e00\u79cd\u7279\u6b8a\u60c5\u51b5\u662f<strong>\u4e92\u65a5<\/strong>\uff0c\u6216\u8005\u4e92\u65a5\u4fe1\u53f7\u3002\u4e92\u65a5\u5c31\u662f\u5177\u6709\u5355\u4e00\u8bb8\u53ef\u6743\u7684\u8ba1\u6570\u4fe1\u53f7\uff0c\u610f\u5473\u7740\u5728\u7ed9\u5b9a\u65f6\u95f4\u4ec5\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u5177\u6709\u8bb8\u53ef\u6743, \u4e92\u65a5\u53ef\u4ee5\u7528\u4e8e\u7ba1\u7406\u5bf9\u5171\u4eab\u8d44\u6e90\u7684\u72ec\u5360\u8bbf\u95ee\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u867d\u7136\u4e92\u65a5\u8bb8\u591a\u5730\u65b9\u4e0e\u9501\u5b9a\u4e00\u6837\uff0c\u4f46\u4e92\u65a5\u8fd8\u6709\u4e00\u4e2a\u9501\u5b9a\u901a\u5e38\u6ca1\u6709\u7684\u529f\u80fd\uff0c\u5c31\u662f\u4e92\u65a5\u53ef\u4ee5\u7531\u4e0d\u5177\u6709\u8bb8\u53ef\u6743\u7684\u5176\u4ed6\u7ebf\u7a0b\u6765\u91ca\u653e, \u8fd9\u5728\u6b7b\u9501\u6062\u590d\u65f6\u4f1a\u975e\u5e38\u6709\u7528\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"cyclicbarrier\">CyclicBarrier<\/h2>\n\n<ul>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">CyclicBarrier<\/code> \u7c7b\u53ef\u4ee5\u5e2e\u52a9\u540c\u6b65\uff0c\u5b83\u5141\u8bb8\u4e00\u7ec4\u7ebf\u7a0b\u7b49\u5f85\u6574\u4e2a\u7ebf\u7a0b\u7ec4\u5230\u8fbe\u516c\u5171\u5c4f\u969c\u70b9\u3002CyclicBarrier \u662f\u4f7f\u7528\u6574\u578b\u53d8\u91cf\u6784\u9020\u7684\uff0c\u5176\u786e\u5b9a\u7ec4\u4e2d\u7684\u7ebf\u7a0b\u6570\u3002\u5f53\u4e00\u4e2a\u7ebf\u7a0b\u5230\u8fbe\u5c4f\u969c\u65f6\uff08\u901a\u8fc7\u8c03\u7528 CyclicBarrier.<code class=\"language-plaintext highlighter-rouge\">await()<\/code>\uff09\uff0c\u5b83\u4f1a\u88ab\u963b\u585e\uff0c\u76f4\u5230\u6240\u6709\u7ebf\u7a0b\u90fd\u5230\u8fbe\u5c4f\u969c\uff0c\u7136\u540e\u5728\u8be5\u70b9\u5141\u8bb8\u6240\u6709\u7ebf\u7a0b\u7ee7\u7eed\u6267\u884c\u3002<\/p>\n  <\/li>\n  <li>\n    <p>CyclicBarrier\u53ef\u4ee5\u91cd\u65b0\u4f7f\u7528, \u4e00\u65e6\u6240\u6709\u7ebf\u7a0b\u90fd\u5df2\u7ecf\u5728\u5c4f\u969c\u5904\u96c6\u5408\u5e76\u91ca\u653e\uff0c\u5219\u53ef\u4ee5\u5c06\u8be5\u5c4f\u969c\u91cd\u65b0\u521d\u59cb\u5316\u5230\u5b83\u7684\u521d\u59cb\u72b6\u6001\u3002 \u8fd8\u53ef\u4ee5\u6307\u5b9a\u5728\u5c4f\u969c\u5904\u7b49\u5f85\u65f6\u7684\u8d85\u65f6\uff1b\u5982\u679c\u5728\u8be5\u65f6\u95f4\u5185\u5176\u4f59\u7ebf\u7a0b\u8fd8\u6ca1\u6709\u5230\u8fbe\u5c4f\u969c\uff0c\u5219\u8ba4\u4e3a\u5c4f\u969c\u88ab\u6253\u7834\uff0c\u6240\u6709\u6b63\u5728\u7b49\u5f85\u7684\u7ebf\u7a0b\u4f1a\u6536\u5230 <code class=\"language-plaintext highlighter-rouge\">BrokenBarrierException<\/code>\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u4e0b\u5217\u4ee3\u7801\u5c06\u521b\u5efa CyclicBarrier \u5e76\u542f\u52a8\u4e00\u7ec4\u7ebf\u7a0b\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u5728\u5230\u8fbe\u5c4f\u969c\u70b9\u524d\u4f1a\u6253\u5370\u51fa\u81ea\u5df1\u7684\u540d\u5b57\uff0c\u7b49\u5f85\u5176\u4ed6\u7ebf\u7a0b\u5230\u9f50\u540e\uff0c\u5c06\u6267\u884cCyclicBarrier\u7ed1\u5b9a\u7684Runnable\uff0c\u8be5Runnable\u5728\u6bcf\u4e2a\u5c4f\u969c\u70b9\u53ea\u6267\u884c\u4e00\u6b21\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code>    <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">){<\/span>\n        <span class=\"nc\">Runnable<\/span> <span class=\"n\">ready<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Runnable<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\n            <span class=\"nd\">@Override<\/span>\n            <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">run<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\n                <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"ready\"<\/span><span class=\"o\">);<\/span>\n            <span class=\"o\">}<\/span>\n        <span class=\"o\">};<\/span>\n\n        <span class=\"nc\">CyclicBarrier<\/span> <span class=\"n\">cyclicBarrier<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">CyclicBarrier<\/span><span class=\"o\">(<\/span><span class=\"mi\">5<\/span><span class=\"o\">,<\/span> <span class=\"n\">ready<\/span><span class=\"o\">);<\/span>\n\n        <span class=\"nc\">ExecutorService<\/span> <span class=\"n\">executor<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Executors<\/span><span class=\"o\">.<\/span><span class=\"na\">newCachedThreadPool<\/span><span class=\"o\">();<\/span>\n        <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span> <span class=\"n\">i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"mi\">5<\/span><span class=\"o\">;<\/span> <span class=\"n\">i<\/span><span class=\"o\">++)<\/span> <span class=\"o\">{<\/span>\n            <span class=\"nc\">Runnable<\/span> <span class=\"n\">task<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Runnable<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\n                <span class=\"nd\">@Override<\/span>\n                <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">run<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\n                    <span class=\"k\">try<\/span> <span class=\"o\">{<\/span>\n                        <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"nc\">Thread<\/span><span class=\"o\">.<\/span><span class=\"na\">currentThread<\/span><span class=\"o\">().<\/span><span class=\"na\">getName<\/span><span class=\"o\">());<\/span>\n                        <span class=\"n\">cyclicBarrier<\/span><span class=\"o\">.<\/span><span class=\"na\">await<\/span><span class=\"o\">();<\/span>\n                    <span class=\"o\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"o\">(<\/span><span class=\"nc\">InterruptedException<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n                        <span class=\"n\">e<\/span><span class=\"o\">.<\/span><span class=\"na\">printStackTrace<\/span><span class=\"o\">();<\/span>\n                    <span class=\"o\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"o\">(<\/span><span class=\"nc\">BrokenBarrierException<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n                        <span class=\"n\">e<\/span><span class=\"o\">.<\/span><span class=\"na\">printStackTrace<\/span><span class=\"o\">();<\/span>\n                    <span class=\"o\">}<\/span>\n                <span class=\"o\">}<\/span>\n            <span class=\"o\">};<\/span>\n            <span class=\"n\">executor<\/span><span class=\"o\">.<\/span><span class=\"na\">submit<\/span><span class=\"o\">(<\/span><span class=\"n\">task<\/span><span class=\"o\">);<\/span>\n        <span class=\"o\">}<\/span>\n        <span class=\"n\">executor<\/span><span class=\"o\">.<\/span><span class=\"na\">shutdown<\/span><span class=\"o\">();<\/span>\n    <span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<h2 id=\"countdownlatch\">CountdownLatch<\/h2>\n\n<ul>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">CountdownLatch<\/code> \u7c7b\u4e0e CyclicBarrier \u76f8\u4f3c\uff0c\u56e0\u4e3a\u5b83\u7684\u89d2\u8272\u662f\u5bf9\u5df2\u7ecf\u5728\u5b83\u4eec\u4e2d\u95f4\u5206\u644a\u4e86\u95ee\u9898\u7684\u4e00\u7ec4\u7ebf\u7a0b\u8fdb\u884c\u534f\u8c03\u3002\u5b83\u4e5f\u662f\u4f7f\u7528\u6574\u578b\u53d8\u91cf\u6784\u9020\u7684\uff0c\u6307\u660e\u8ba1\u6570\u7684\u521d\u59cb\u503c\uff0c\u4f46\u662f\u4e0e CyclicBarrier \u4e0d\u540c\u7684\u662f\uff0cCountdownLatch \u4e0d\u80fd\u91cd\u65b0\u4f7f\u7528\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u5176\u4e2d\uff0cCyclicBarrier \u662f\u5230\u8fbe\u5c4f\u969c\u7684\u6240\u6709\u7ebf\u7a0b\u7684\u5927\u95e8\uff0c\u53ea\u6709\u5f53\u6240\u6709\u7ebf\u7a0b\u90fd\u5df2\u7ecf\u5230\u8fbe\u5c4f\u969c\u6216\u5c4f\u969c\u88ab\u6253\u7834\u65f6\uff0c\u624d\u5141\u8bb8\u8fd9\u4e9b\u7ebf\u7a0b\u901a\u8fc7\u3002CountdownLatch \u5c06\u5230\u8fbe\u548c\u7b49\u5f85\u529f\u80fd\u5206\u79bb\uff0c\u4efb\u4f55\u7ebf\u7a0b\u90fd\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528 <code class=\"language-plaintext highlighter-rouge\">countDown()<\/code> \u51cf\u5c11\u5f53\u524d\u8ba1\u6570\uff0c\u8fd9\u79cd\u65b9\u5f0f\u4e0d\u4f1a\u963b\u585e\u7ebf\u7a0b\uff0c\u800c\u53ea\u662f\u51cf\u5c11\u8ba1\u6570\u3002<code class=\"language-plaintext highlighter-rouge\">await()<\/code> \u65b9\u6cd5\u7684\u884c\u4e3a\u4e0e CyclicBarrier.await() \u7a0d\u5fae\u6709\u6240\u4e0d\u540c\uff0c\u8c03\u7528 await() \u4efb\u4f55\u7ebf\u7a0b\u90fd\u4f1a\u88ab\u963b\u585e\uff0c\u76f4\u5230\u95e9\u9501\u8ba1\u6570\u51cf\u5c11\u4e3a\u96f6\uff0c\u5728\u8be5\u70b9\u7b49\u5f85\u7684\u6240\u6709\u7ebf\u7a0b\u624d\u88ab\u91ca\u653e\uff0c\u5bf9 await() \u7684\u540e\u7eed\u8c03\u7528\u5c06\u7acb\u5373\u8fd4\u56de\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u5f53\u95ee\u9898\u5df2\u7ecf\u5206\u89e3\u4e3a\u8bb8\u591a\u90e8\u5206\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u88ab\u5206\u914d\u4e00\u90e8\u5206\u8ba1\u7b97\u65f6\uff0cCountdownLatch \u975e\u5e38\u6709\u7528\u3002\u5728\u5de5\u4f5c\u7ebf\u7a0b\u7ed3\u675f\u65f6\uff0c\u5b83\u4eec\u5c06\u51cf\u5c11\u8ba1\u6570\uff0c\u534f\u8c03\u7ebf\u7a0b\u53ef\u4ee5\u5728\u95e9\u9501\u5904\u7b49\u5f85\u5f53\u524d\u8fd9\u4e00\u6279\u8ba1\u7b97\u7ed3\u675f\uff0c\u7136\u540e\u7ee7\u7eed\u79fb\u81f3\u4e0b\u4e00\u6279\u8ba1\u7b97\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">InterruptedException<\/span> <span class=\"o\">{<\/span>\n    <span class=\"kt\">int<\/span> <span class=\"n\">concurrency<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">5<\/span><span class=\"o\">;<\/span>\n    <span class=\"nc\">ExecutorService<\/span> <span class=\"n\">executor<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Executors<\/span><span class=\"o\">.<\/span><span class=\"na\">newCachedThreadPool<\/span><span class=\"o\">();<\/span>\n\n    <span class=\"kd\">final<\/span> <span class=\"nc\">CountDownLatch<\/span> <span class=\"n\">ready<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">CountDownLatch<\/span><span class=\"o\">(<\/span><span class=\"n\">concurrency<\/span><span class=\"o\">);<\/span>\n    <span class=\"kd\">final<\/span> <span class=\"nc\">CountDownLatch<\/span> <span class=\"n\">start<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">CountDownLatch<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\n    <span class=\"kd\">final<\/span> <span class=\"nc\">CountDownLatch<\/span> <span class=\"n\">done<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">CountDownLatch<\/span><span class=\"o\">(<\/span><span class=\"n\">concurrency<\/span><span class=\"o\">);<\/span>\n    <span class=\"k\">for<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">i<\/span><span class=\"o\">=<\/span><span class=\"mi\">0<\/span><span class=\"o\">;<\/span> <span class=\"n\">i<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">concurrency<\/span><span class=\"o\">;<\/span> <span class=\"n\">i<\/span><span class=\"o\">++){<\/span>\n        <span class=\"n\">executor<\/span><span class=\"o\">.<\/span><span class=\"na\">execute<\/span><span class=\"o\">(<\/span><span class=\"k\">new<\/span> <span class=\"nc\">Runnable<\/span><span class=\"o\">(){<\/span>\n            <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">run<\/span><span class=\"o\">(){<\/span>\n                <span class=\"n\">ready<\/span><span class=\"o\">.<\/span><span class=\"na\">countDown<\/span><span class=\"o\">();<\/span>\n                <span class=\"k\">try<\/span> <span class=\"o\">{<\/span>\n                    <span class=\"n\">start<\/span><span class=\"o\">.<\/span><span class=\"na\">await<\/span><span class=\"o\">();<\/span>\n                    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"nc\">Thread<\/span><span class=\"o\">.<\/span><span class=\"na\">currentThread<\/span><span class=\"o\">().<\/span><span class=\"na\">getName<\/span><span class=\"o\">()<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"----done\"<\/span><span class=\"o\">);<\/span>\n                <span class=\"o\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"o\">(<\/span><span class=\"nc\">InterruptedException<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n                    <span class=\"n\">e<\/span><span class=\"o\">.<\/span><span class=\"na\">printStackTrace<\/span><span class=\"o\">();<\/span>\n                <span class=\"o\">}<\/span>\n                <span class=\"n\">done<\/span><span class=\"o\">.<\/span><span class=\"na\">countDown<\/span><span class=\"o\">();<\/span>\n            <span class=\"o\">}<\/span>\n        <span class=\"o\">});<\/span>\n    <span class=\"o\">}<\/span>\n    <span class=\"n\">ready<\/span><span class=\"o\">.<\/span><span class=\"na\">await<\/span><span class=\"o\">();<\/span>\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"all threads are ready\"<\/span><span class=\"o\">);<\/span>\n    <span class=\"n\">start<\/span><span class=\"o\">.<\/span><span class=\"na\">countDown<\/span><span class=\"o\">();<\/span>\n    <span class=\"n\">done<\/span><span class=\"o\">.<\/span><span class=\"na\">await<\/span><span class=\"o\">();<\/span>\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"all threads finished\"<\/span><span class=\"o\">);<\/span>\n    <span class=\"n\">executor<\/span><span class=\"o\">.<\/span><span class=\"na\">shutdown<\/span><span class=\"o\">();<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<h2 id=\"exchanger\">Exchanger<\/h2>\n\n<ul>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">Exchanger<\/code> \u7c7b\u65b9\u4fbf\u4e86\u4e24\u4e2a\u5171\u540c\u64cd\u4f5c\u7ebf\u7a0b\u4e4b\u95f4\u7684\u53cc\u5411\u4ea4\u6362\uff0c\u5c31\u50cf\u5177\u6709\u8ba1\u6570\u4e3a 2 \u7684 CyclicBarrier\uff0c\u5e76\u4e14\u4e24\u4e2a\u7ebf\u7a0b\u5728\u90fd\u5230\u8fbe\u5c4f\u969c\u65f6\u53ef\u4ee5\u201d\u4ea4\u6362\u201d\u4e00\u4e9b\u72b6\u6001\u3002\uff08Exchanger \u6a21\u5f0f\u6709\u65f6\u4e5f\u79f0\u4e3a\u805a\u96c6\u3002\uff09<\/p>\n  <\/li>\n  <li>\n    <p>Exchanger \u901a\u5e38\u7528\u4e8e\u4e00\u4e2a\u7ebf\u7a0b\u586b\u5145\u7f13\u51b2\uff08\u901a\u8fc7\u8bfb\u53d6 socket\uff09\uff0c\u800c\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u6e05\u7a7a\u7f13\u51b2\uff08\u901a\u8fc7\u5904\u7406\u4ece socket \u6536\u5230\u7684\u547d\u4ee4\uff09\u7684\u60c5\u51b5\u3002\u5f53\u4e24\u4e2a\u7ebf\u7a0b\u5728\u5c4f\u969c\u5904\u96c6\u5408\u65f6\uff0c\u5b83\u4eec\u4ea4\u6362\u7f13\u51b2\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u4e0b\u5217\u4ee3\u7801\u8bf4\u660e\u4e86\u8fd9\u9879\u6280\u672f\uff1a<\/p>\n  <\/li>\n<\/ul>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">){<\/span>\n    <span class=\"nc\">Exchanger<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">String<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">exchanger<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Exchanger<\/span><span class=\"o\">&lt;&gt;();<\/span>\n    <span class=\"nc\">ExecutorService<\/span> <span class=\"n\">executor<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Executors<\/span><span class=\"o\">.<\/span><span class=\"na\">newCachedThreadPool<\/span><span class=\"o\">();<\/span>\n\n    <span class=\"nc\">Runnable<\/span> <span class=\"n\">producer<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Runnable<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\n        <span class=\"nd\">@Override<\/span>\n        <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">run<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\n            <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span> <span class=\"n\">i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"mi\">5<\/span><span class=\"o\">;<\/span> <span class=\"n\">i<\/span><span class=\"o\">++)<\/span> <span class=\"o\">{<\/span>\n                <span class=\"k\">try<\/span> <span class=\"o\">{<\/span>\n                    <span class=\"nc\">String<\/span> <span class=\"n\">data<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"produce\"<\/span><span class=\"o\">;<\/span>\n                    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"nc\">Thread<\/span><span class=\"o\">.<\/span><span class=\"na\">currentThread<\/span><span class=\"o\">().<\/span><span class=\"na\">getName<\/span><span class=\"o\">()<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"-offer----\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">data<\/span><span class=\"o\">);<\/span>\n                    <span class=\"n\">exchanger<\/span><span class=\"o\">.<\/span><span class=\"na\">exchange<\/span><span class=\"o\">(<\/span><span class=\"n\">data<\/span><span class=\"o\">);<\/span>\n                <span class=\"o\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"o\">(<\/span><span class=\"nc\">InterruptedException<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n                    <span class=\"n\">e<\/span><span class=\"o\">.<\/span><span class=\"na\">printStackTrace<\/span><span class=\"o\">();<\/span>\n                <span class=\"o\">}<\/span>\n            <span class=\"o\">}<\/span>\n        <span class=\"o\">}<\/span>\n    <span class=\"o\">};<\/span>\n\n    <span class=\"nc\">Runnable<\/span> <span class=\"n\">consumer<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Runnable<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\n        <span class=\"nd\">@Override<\/span>\n        <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">run<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\n            <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span> <span class=\"n\">i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"mi\">5<\/span><span class=\"o\">;<\/span> <span class=\"n\">i<\/span><span class=\"o\">++)<\/span> <span class=\"o\">{<\/span>\n                <span class=\"k\">try<\/span> <span class=\"o\">{<\/span>\n                    <span class=\"nc\">String<\/span> <span class=\"n\">data<\/span> <span class=\"o\">=<\/span> <span class=\"n\">exchanger<\/span><span class=\"o\">.<\/span><span class=\"na\">exchange<\/span><span class=\"o\">(<\/span><span class=\"kc\">null<\/span><span class=\"o\">);<\/span>\n                    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"nc\">Thread<\/span><span class=\"o\">.<\/span><span class=\"na\">currentThread<\/span><span class=\"o\">().<\/span><span class=\"na\">getName<\/span><span class=\"o\">()<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"-get----\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">data<\/span><span class=\"o\">);<\/span>\n                <span class=\"o\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"o\">(<\/span><span class=\"nc\">InterruptedException<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n                    <span class=\"n\">e<\/span><span class=\"o\">.<\/span><span class=\"na\">printStackTrace<\/span><span class=\"o\">();<\/span>\n                <span class=\"o\">}<\/span>\n\n            <span class=\"o\">}<\/span>\n        <span class=\"o\">}<\/span>\n    <span class=\"o\">};<\/span>\n\n    <span class=\"n\">executor<\/span><span class=\"o\">.<\/span><span class=\"na\">execute<\/span><span class=\"o\">(<\/span><span class=\"n\">producer<\/span><span class=\"o\">);<\/span>\n    <span class=\"n\">executor<\/span><span class=\"o\">.<\/span><span class=\"na\">execute<\/span><span class=\"o\">(<\/span><span class=\"n\">consumer<\/span><span class=\"o\">);<\/span>\n    <span class=\"n\">executor<\/span><span class=\"o\">.<\/span><span class=\"na\">shutdown<\/span><span class=\"o\">();<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<h1 id=\"lock\u5de5\u5177\">Lock\u5de5\u5177<\/h1>\n\n<ul>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">Lock<\/code> \u63a5\u53e3\u5c06\u5185\u7f6e\u76d1\u89c6\u5668\u9501\u5b9a\u7684\u884c\u4e3a\u666e\u904d\u5316\uff0c\u5141\u8bb8\u591a\u4e2a\u9501\u5b9a\u5b9e\u73b0\uff0c\u540c\u65f6\u63d0\u4f9b\u4e00\u4e9b\u5185\u7f6e\u9501\u5b9a\u7f3a\u5c11\u7684\u529f\u80fd\uff0c\u5982<strong>\u8ba1\u65f6<\/strong>\u7684\u7b49\u5f85\u3001<strong>\u53ef\u4e2d\u65ad<\/strong>\u7684\u7b49\u5f85\u3001\u9501\u5b9a<strong>\u8f6e\u8be2<\/strong>\u3001\u6bcf\u4e2a\u9501\u5b9a\u6709\u591a\u4e2a<strong>\u6761\u4ef6<\/strong>\u7b49\u5f85\u96c6\u5408\u4ee5\u53ca<strong>\u65e0\u963b\u585e<\/strong>\u7ed3\u6784\u7684\u9501\u5b9a\u3002<\/p>\n  <\/li>\n  <li>\n    <p>java.util.concurrent.<code class=\"language-plaintext highlighter-rouge\">locks<\/code>\u5305\u63d0\u4f9b\u4e86\u590d\u6742\u7684\u9501, \u9501\u5bf9\u8c61\u4f5c\u7528\u975e\u5e38\u7c7b\u4f3c\u540c\u6b65\u4ee3\u7801\u4f7f\u7528\u7684\u9690\u5f0f\u9501, \u6bcf\u6b21\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u83b7\u5f97\u9501\u5bf9\u8c61\u3002\u901a\u8fc7\u5173\u8054<code class=\"language-plaintext highlighter-rouge\">Condition<\/code>\u5bf9\u8c61\uff0c\u9501\u5bf9\u8c61\u4e5f\u652f\u6301<code class=\"language-plaintext highlighter-rouge\">wait\/notify<\/code>\u673a\u5236\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u9501\u5bf9\u8c61\u4e4b\u4e8e\u9690\u5f0f\u9501\u6700\u5927\u7684\u4f18\u52bf\u5728\u4e8e\uff0c\u5b83\u4eec<strong>\u6709\u80fd\u529b\u6536\u56de\u83b7\u53d6\u9501\u7684\u5c1d\u8bd5<\/strong>\uff08\u5982\u679c\u83b7\u53d6\u9501\u5931\u8d25\uff0c\u5c06\u4e0d\u4f1a\u7ee7\u7eed\u8bf7\u6c42\uff0c\u4ee5\u514d\u53d1\u751f\u6b7b\u9501\uff09\u3002\u5982\u679c\u5f53\u524d\u9501\u5bf9\u8c61\u4e0d\u53ef\u7528\uff0c\u6216\u8005\u9501\u8bf7\u6c42\u8d85\u65f6\uff08\u5982\u679c\u8d85\u65f6\u65f6\u95f4\u5df2\u6307\u5b9a\uff09\uff0c<code class=\"language-plaintext highlighter-rouge\">tryLock<\/code>\u65b9\u6cd5\u4f1a\u6536\u56de\u83b7\u53d6\u9501\u7684\u8bf7\u6c42\u3002\u5982\u679c\u5728\u9501\u83b7\u53d6\u524d\uff0c\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u53d1\u9001\u4e86\u4e00\u4e2a\u4e2d\u65ad\uff0c<code class=\"language-plaintext highlighter-rouge\">lockInterruptibly<\/code>\u65b9\u6cd5\u4e5f\u4f1a\u6536\u56de\u83b7\u53d6\u9501\u7684\u8bf7\u6c42\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"reentrantlock\">ReentrantLock<\/h2>\n\n<ul>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">ReentrantLock<\/code> \u662f\u5177\u6709\u4e0e\u9690\u5f0f\u76d1\u89c6\u5668\u9501\u5b9a\uff08\u4f7f\u7528 synchronized \u65b9\u6cd5\u548c\u8bed\u53e5\u8bbf\u95ee\uff09\u76f8\u540c\u7684\u57fa\u672c\u884c\u4e3a\u548c\u8bed\u4e49\u7684 Lock \u7684\u5b9e\u73b0\uff0c\u4f46\u5b83\u5177\u6709\u6269\u5c55\u7684\u80fd\u529b\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u5728\u7ade\u4e89\u6761\u4ef6\u4e0b\uff0cReentrantLock \u7684\u5b9e\u73b0\u8981\u6bd4\u73b0\u5728\u7684 synchronized \u5b9e\u73b0\u66f4\u5177\u6709\u53ef\u4f38\u7f29\u6027\u3002\u8fd9\u610f\u5473\u7740\u5f53\u8bb8\u591a\u7ebf\u7a0b\u90fd\u7ade\u4e89\u76f8\u540c\u9501\u5b9a\u65f6\uff0c\u4f7f\u7528 ReentrantLock \u7684\u541e\u5410\u91cf\u901a\u5e38\u8981\u6bd4 synchronized \u597d\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u867d\u7136 ReentrantLock \u7c7b\u6709\u8bb8\u591a\u4f18\u70b9\uff0c\u4f46\u662f\u4e0e\u540c\u6b65\u76f8\u6bd4\uff0c\u5b83\u6709\u4e00\u4e2a\u4e3b\u8981<strong>\u7f3a\u70b9<\/strong> \u2013 \u5b83\u53ef\u80fd\u5fd8\u8bb0\u91ca\u653e\u9501\u5b9a\u3002\u56e0\u4e3a\u9501\u5b9a\u5931\u8bef\uff08\u5fd8\u8bb0\u91ca\u653e\u9501\u5b9a\uff09\u7684\u98ce\u9669\uff0c\u6240\u4ee5\u5bf9\u4e8e\u57fa\u672c\u9501\u5b9a\uff0c\u5f3a\u70c8\u5efa\u8bae\u7ee7\u7eed\u4f7f\u7528 synchronized\uff0c\u9664\u975e\u771f\u7684\u9700\u8981 ReentrantLock \u989d\u5916\u7684\u7075\u6d3b\u6027\u548c\u53ef\u4f38\u7f29\u6027\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u5efa\u8bae\u5f53\u83b7\u5f97\u548c\u91ca\u653e ReentrantLock \u65f6\u4f7f\u7528\u4e0b\u5217\u7ed3\u6784\uff1a<\/p>\n  <\/li>\n<\/ul>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"nc\">Lock<\/span> <span class=\"n\">lock<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ReentrantLock<\/span><span class=\"o\">();<\/span>\n<span class=\"o\">...<\/span>\n<span class=\"n\">lock<\/span><span class=\"o\">.<\/span><span class=\"na\">lock<\/span><span class=\"o\">();<\/span>\n<span class=\"k\">try<\/span> <span class=\"o\">{<\/span>\n  <span class=\"c1\">\/\/ perform operations protected by lock<\/span>\n<span class=\"o\">}<\/span>\n<span class=\"k\">catch<\/span><span class=\"o\">(<\/span><span class=\"nc\">Exception<\/span> <span class=\"n\">ex<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n <span class=\"c1\">\/\/ restore invariants<\/span>\n<span class=\"o\">}<\/span>\n<span class=\"k\">finally<\/span> <span class=\"o\">{<\/span>\n  <span class=\"n\">lock<\/span><span class=\"o\">.<\/span><span class=\"na\">unlock<\/span><span class=\"o\">();<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<h2 id=\"condition\">Condition<\/h2>\n\n<ul>\n  <li>\n    <p>\u5c31\u50cf Lock \u63a5\u53e3\u662f\u540c\u6b65\u7684\u5177\u4f53\u5316\uff0c<code class=\"language-plaintext highlighter-rouge\">Condition<\/code> \u63a5\u53e3\u662f Object \u4e2d wait() \u548c notify() \u65b9\u6cd5\u7684\u5177\u4f53\u5316\u3002Lock \u4e2d\u7684\u4e00\u4e2a\u65b9\u6cd5\u662f <code class=\"language-plaintext highlighter-rouge\">newCondition()<\/code>\uff0c\u5b83\u8981\u6c42\u8be5\u9501\u5b9a\u8fd4\u56de\u65b0\u7684 Condition \u5bf9\u8c61\u9650\u5236\u3002<\/p>\n  <\/li>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">await()<\/code>\u3001<code class=\"language-plaintext highlighter-rouge\">signal()<\/code> \u548c <code class=\"language-plaintext highlighter-rouge\">signalAll()<\/code> \u65b9\u6cd5\u7c7b\u4f3c\u4e8e wait()\u3001notify() \u548c notifyAll()\uff0c\u4f46\u589e\u52a0\u4e86\u7075\u6d3b\u6027\uff0c\u6bcf\u4e2a Lock \u90fd\u53ef\u4ee5\u521b\u5efa\u591a\u4e2a\u6761\u4ef6\u53d8\u91cf\u3002\u8fd9\u7b80\u5316\u4e86\u4e00\u4e9b\u5e76\u53d1\u7b97\u6cd5\u7684\u5b9e\u73b0\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h2 id=\"readwritelock\">ReadWriteLock<\/h2>\n\n<ul>\n  <li>\n    <p>ReentrantLock \u5b9e\u73b0\u7684\u9501\u5b9a\u89c4\u5219\u975e\u5e38\u7b80\u5355 \u2013 \u6bcf\u5f53\u4e00\u4e2a\u7ebf\u7a0b\u5177\u6709\u9501\u5b9a\u65f6\uff0c\u5176\u4ed6\u7ebf\u7a0b\u5fc5\u987b\u7b49\u5f85\uff0c\u76f4\u5230\u8be5\u9501\u5b9a\u53ef\u7528\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u6709\u65f6\uff0c\u5f53\u5bf9\u6570\u636e\u7ed3\u6784\u7684\u8bfb\u53d6\u901a\u5e38\u591a\u4e8e\u4fee\u6539\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u66f4\u590d\u6742\u7684\u79f0\u4e3a\u8bfb\u5199\u9501\u5b9a\u7684\u9501\u5b9a\u7ed3\u6784\uff0c\u5b83\u5141\u8bb8\u6709\u591a\u4e2a\u5e76\u53d1\u8bfb\u8005\uff0c\u540c\u65f6\u8fd8\u5141\u8bb8\u4e00\u4e2a\u5199\u5165\u8005\u72ec\u5360\u9501\u5b9a\u3002\u8be5\u65b9\u6cd5\u5728\u4e00\u822c\u60c5\u51b5\u4e0b\uff08\u53ea\u8bfb\uff09\u63d0\u4f9b\u4e86\u66f4\u5927\u7684\u5e76\u53d1\u6027\uff0c\u540c\u65f6\u5728\u5fc5\u8981\u65f6\u4ecd\u63d0\u4f9b\u72ec\u5360\u8bbf\u95ee\u7684\u5b89\u5168\u6027\u3002<\/p>\n  <\/li>\n  <li>\n    <p><code class=\"language-plaintext highlighter-rouge\">ReadWriteLock<\/code> \u63a5\u53e3\u548c <code class=\"language-plaintext highlighter-rouge\">ReentrantReadWriteLock<\/code> \u7c7b\u63d0\u4f9b\u8fd9\u79cd\u529f\u80fd \u2013 <strong>\u591a\u8bfb\u8005<\/strong>\u3001<strong>\u5355\u5199\u5165<\/strong>\u8005\u9501\u5b9a\u89c4\u5219\uff0c\u53ef\u4ee5\u7528\u8fd9\u79cd\u529f\u80fd\u6765\u4fdd\u62a4\u5171\u4eab\u7684\u6613\u53d8\u8d44\u6e90\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h1 id=\"\u539f\u5b50\u53d8\u91cf\">\u539f\u5b50\u53d8\u91cf<\/h1>\n\n<ul>\n  <li>\n    <p>java.util.concurrent.<code class=\"language-plaintext highlighter-rouge\">atomic<\/code>\u5305\u5b9a\u4e49\u4e86\u5bf9\u5355\u4e00\u53d8\u91cf\u8fdb\u884c\u539f\u5b50\u64cd\u4f5c\u7684\u7c7b\u3002\u6240\u6709\u7684\u7c7b\u90fd\u63d0\u4f9b\u4e86<code class=\"language-plaintext highlighter-rouge\">get<\/code>\u548c<code class=\"language-plaintext highlighter-rouge\">set<\/code>\u65b9\u6cd5\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b83\u4eec\u50cf\u8bfb\u5199<code class=\"language-plaintext highlighter-rouge\">volatile<\/code>\u53d8\u91cf\u4e00\u6837\u8bfb\u5199\u539f\u5b50\u7c7b\u3002\u5c31\u662f\u8bf4\uff0c\u540c\u4e00\u53d8\u91cf\u4e0a\u7684\u4e00\u4e2aset\u64cd\u4f5c\u5bf9\u4e8e\u4efb\u610f\u540e\u7eed\u7684get\u64cd\u4f5c\u5b58\u5728happens-before\u5173\u7cfb\u3002\u539f\u5b50\u7684<code class=\"language-plaintext highlighter-rouge\">compareAndSet<\/code>\u65b9\u6cd5\u4e5f\u6709\u5185\u5b58\u4e00\u81f4\u6027\u7279\u70b9\uff0c\u5c31\u50cf\u5e94\u7528\u5230\u6574\u578b\u539f\u5b50\u53d8\u91cf\u4e2d\u7684\u7b80\u5355\u539f\u5b50\u7b97\u6cd5\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u5373\u4f7f\u5927\u591a\u6570\u7528\u6237\u5c06\u5f88\u5c11\u76f4\u63a5\u4f7f\u7528\u5b83\u4eec\uff0c\u539f\u5b50\u53d8\u91cf\u7c7b\uff08<code class=\"language-plaintext highlighter-rouge\">AtomicInteger<\/code>\u3001<code class=\"language-plaintext highlighter-rouge\">AtomicLong<\/code>\u3001<code class=\"language-plaintext highlighter-rouge\">AtomicReference<\/code> \u7b49\u7b49\uff09\u4e5f\u6709\u5145\u5206\u7406\u7531\u662f\u6700\u663e\u8457\u7684\u65b0\u5e76\u53d1\u7c7b\u3002\u8fd9\u4e9b\u7c7b\u516c\u5f00\u5bf9 JVM \u7684\u4f4e\u7ea7\u522b\u6539\u8fdb\uff0c\u5141\u8bb8\u8fdb\u884c\u5177\u6709\u9ad8\u5ea6\u53ef\u4f38\u7f29\u6027\u7684<strong>\u539f\u5b50\u8bfb-\u4fee\u6539-\u5199\u64cd\u4f5c<\/strong>\u3002\u5927\u591a\u6570\u73b0\u4ee3 CPU \u90fd\u6709\u539f\u5b50\u8bfb-\u4fee\u6539-\u5199\u7684\u539f\u8bed\uff0c\u6bd4\u5982\u6bd4\u8f83\u5e76\u4ea4\u6362\uff08CAS\uff09\u6216\u52a0\u8f7d\u94fe\u63a5\/\u6761\u4ef6\u5b58\u50a8\uff08LL\/SC\uff09\u3002\u539f\u5b50\u53d8\u91cf\u7c7b\u4f7f\u7528\u786c\u4ef6\u63d0\u4f9b\u7684\u6700\u5feb\u7684\u5e76\u53d1\u7ed3\u6784\u6765\u5b9e\u73b0\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u51e0\u4e4e java.util.concurrent \u4e2d\u7684\u6240\u6709\u7c7b\u90fd\u662f\u5728 <code class=\"language-plaintext highlighter-rouge\">ReentrantLock<\/code> \u4e4b\u4e0a\u6784\u5efa\u7684\uff0cReentrantLock \u5219\u662f\u5728<strong>\u539f\u5b50\u53d8\u91cf\u7c7b<\/strong>\u7684\u57fa\u7840\u4e0a\u6784\u5efa\u7684\u3002\u6240\u4ee5\uff0c\u867d\u7136\u4ec5\u5c11\u6570\u5e76\u53d1\u4e13\u5bb6\u4f7f\u7528\u539f\u5b50\u53d8\u91cf\u7c7b\uff0c\u4f46 java.util.concurrent \u7c7b\u7684\u5f88\u591a\u53ef\u4f38\u7f29\u6027\u6539\u8fdb\u90fd\u662f\u7531\u5b83\u4eec\u63d0\u4f9b\u7684\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u539f\u5b50\u53d8\u91cf\u4e3b\u8981\u7528\u4e8e\u4e3a\u539f\u5b50\u5730\u66f4\u65b0 \u201c\u70ed\u201d \u5b57\u6bb5\u63d0\u4f9b\u6709\u6548\u7684\u3001\u7ec6\u7c92\u5ea6\u7684\u65b9\u5f0f\uff0c \u201c\u70ed\u201d \u5b57\u6bb5\u662f\u6307\u7531\u591a\u4e2a\u7ebf\u7a0b\u9891\u7e41\u8bbf\u95ee\u548c\u66f4\u65b0\u7684\u5b57\u6bb5\u3002\u53e6\u5916\uff0c\u539f\u5b50\u53d8\u91cf\u8fd8\u662f\u8ba1\u6570\u5668\u6216\u751f\u6210\u5e8f\u53f7\u7684\u81ea\u7136\u673a\u5236\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h1 id=\"\u5e76\u53d1\u968f\u673a\u6570\">\u5e76\u53d1\u968f\u673a\u6570<\/h1>\n\n<ul>\n  <li>\n    <p>\u5728JDK7\u4e2d\uff0cjava.util.concurrent\u5305\u542b\u4e86\u4e00\u4e2a\u76f8\u5f53\u4fbf\u5229\u7684\u7c7b\uff0c<code class=\"language-plaintext highlighter-rouge\">ThreadLocalRandom<\/code>\uff0c\u5f53\u5e94\u7528\u7a0b\u5e8f\u671f\u671b\u5728\u591a\u4e2a\u7ebf\u7a0b\u6216ForkJoinTasks\u4e2d\u4f7f\u7528\u968f\u673a\u6570\u65f6\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u5bf9\u4e8e\u5e76\u53d1\u8bbf\u95ee\uff0c\u4f7f\u7528TheadLocalRandom\u4ee3\u66ffMath.random()\u53ef\u4ee5\u51cf\u5c11\u7ade\u4e89\uff0c\u4ece\u800c\u83b7\u5f97\u66f4\u597d\u7684\u6027\u80fd\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u53ea\u9700\u8c03\u7528ThreadLocalRandom.<code class=\"language-plaintext highlighter-rouge\">current()<\/code>\uff0c \u7136\u540e\u8c03\u7528\u5b83\u7684\u5176\u4e2d\u4e00\u4e2a\u65b9\u6cd5\u53bb\u83b7\u53d6\u4e00\u4e2a\u968f\u673a\u6570\u5373\u53ef\u3002<\/p>\n  <\/li>\n<\/ul>\n\n<h1 id=\"\u6027\u80fd\u4e0e\u53ef\u4f38\u7f29\u6027\">\u6027\u80fd\u4e0e\u53ef\u4f38\u7f29\u6027<\/h1>\n\n<ul>\n  <li>\n    <p><strong>\u6027\u80fd<\/strong>\u662f \u201c\u53ef\u4ee5\u5feb\u901f\u6267\u884c\u6b64\u4efb\u52a1\u7684\u7a0b\u5ea6\u201d \u7684\u8bc4\u6d4b\u3002<strong>\u53ef\u4f38\u7f29\u6027<\/strong>\u63cf\u8ff0\u5e94\u7528\u7a0b\u5e8f\u7684<strong>\u541e\u5410\u91cf\u5982\u4f55\u8868\u73b0\u4e3a\u5b83\u7684\u5de5\u4f5c\u91cf\u548c\u53ef\u7528\u8ba1\u7b97\u8d44\u6e90\u589e\u52a0<\/strong>\u3002<\/p>\n  <\/li>\n  <li>\n    <p>\u53ef\u4f38\u7f29\u7684\u7a0b\u5e8f\u53ef\u4ee5\u6309\u6bd4\u4f8b\u4f7f\u7528\u66f4\u591a\u7684\u5904\u7406\u5668\u3001\u5185\u5b58\u6216 I\/O \u5e26\u5bbd\u6765\u5904\u7406\u66f4\u591a\u4e2a\u5de5\u4f5c\u91cf\u3002\u5f53\u6211\u4eec\u5728\u5e76\u53d1\u73af\u5883\u4e2d\u8c08\u8bba\u53ef\u4f38\u7f29\u6027\u65f6\uff0c\u6211\u4eec\u662f\u5728\u95ee\u5f53\u8bb8\u591a\u7ebf\u7a0b\u540c\u65f6\u8bbf\u95ee\u7ed9\u5b9a\u7c7b\u65f6\uff0c\u8fd9\u4e2a\u7c7b\u7684\u6267\u884c\u60c5\u51b5\u3002<\/p>\n  <\/li>\n  <li>\n    <p>java.util.concurrent \u4e2d\u7684\u4f4e\u7ea7\u522b\u7c7b ReentrantLock \u548c\u539f\u5b50\u53d8\u91cf\u7c7b\u7684\u53ef\u4f38\u7f29\u6027\u8981\u6bd4\u5185\u7f6e\u76d1\u89c6\u5668\uff08\u540c\u6b65\uff09\u9501\u5b9a\u9ad8\u5f97\u591a\u3002\u56e0\u6b64\uff0c\u4f7f\u7528 ReentrantLock \u6216\u539f\u5b50\u53d8\u91cf\u7c7b\u6765\u534f\u8c03\u5171\u4eab\u8bbf\u95ee\u7684\u7c7b\u4e5f\u53ef\u80fd\u66f4\u5177\u6709\u53ef\u4f38\u7f29\u6027\u3002<\/p>\n  <\/li>\n<\/ul>\n\n","pubDate":"Sun, 18 May 2014 00:00:00 +0000","link":"https:\/\/bit-ranger.github.io\/blog\/java\/java-concurrent\/","guid":"https:\/\/bit-ranger.github.io\/blog\/java\/java-concurrent\/","category":["Java","Concurrent","Java"]},{"title":"\u4e71\u7801\u73b0\u8c61\u5206\u6790","description":"<p>\u6211\u4eec\u77e5\u9053\uff0cweb\u6d4f\u89c8\u5668\u4f1a\u5c06form\u4e2d\u7684\u5185\u5bb9\u6253\u5305\u6210HTTP\u8bf7\u6c42\u4f53\uff0c\u7136\u540e\u53d1\u9001\u5230\u670d\u52a1\u7aef\uff0c\u670d\u52a1\u7aef\u5bf9\u8bf7\u6c42\u4f53\u89e3\u6790\u540e\u53ef\u4ee5\u5f97\u5230\u4f20\u9012\u7684\u6570\u636e\u3002\u8fd9\u5f53\u4e2d\u5305\u542b\u4e24\u4e2a\u8fc7\u7a0b\uff1a<code class=\"language-plaintext highlighter-rouge\">encode<\/code>\u4e0e<code class=\"language-plaintext highlighter-rouge\">decode<\/code>\u3002<\/p>\n\n<ul id=\"markdown-toc\">\n  <li><a href=\"#http\" id=\"markdown-toc-http\">HTTP<\/a><\/li>\n  <li><a href=\"#urlencode\" id=\"markdown-toc-urlencode\">UrlEncode<\/a><\/li>\n  <li><a href=\"#urldecode\" id=\"markdown-toc-urldecode\">UrlDecode<\/a><\/li>\n  <li><a href=\"#\u65b9\u6848\" id=\"markdown-toc-\u65b9\u6848\">\u65b9\u6848<\/a><\/li>\n<\/ul>\n\n<h1 id=\"http\">HTTP<\/h1>\n\n<p>\u6211\u4eec\u4f7f\u7528ServerSocket\u642d\u5efa\u4e00\u4e2a\u5c0f\u670d\u52a1\u5668\u6765\u770b\u6e05http\u8bf7\u6c42\u7684\u5168\u8c8c, \u8be5\u670d\u52a1\u5668\u53ea\u6709\u4e00\u4e2a\u529f\u80fd, \u5c31\u662f\u6253\u5370\u8bf7\u6c42\u4f53\u3002<\/p>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">HttpPrint<\/span> <span class=\"o\">{<\/span>\n    <span class=\"kd\">private<\/span> <span class=\"nc\">ServerSocket<\/span> <span class=\"n\">serverSocket<\/span><span class=\"o\">;<\/span>\n\n    <span class=\"kd\">public<\/span> <span class=\"nf\">HttpPrint<\/span><span class=\"o\">()<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">IOException<\/span> <span class=\"o\">{<\/span>\n        <span class=\"n\">serverSocket<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ServerSocket<\/span><span class=\"o\">(<\/span><span class=\"mi\">8080<\/span><span class=\"o\">);<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">show<\/span><span class=\"o\">()<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">IOException<\/span><span class=\"o\">{<\/span>\n        <span class=\"k\">while<\/span><span class=\"o\">(<\/span><span class=\"kc\">true<\/span><span class=\"o\">){<\/span>\n            <span class=\"nc\">Socket<\/span> <span class=\"n\">socket<\/span> <span class=\"o\">=<\/span> <span class=\"n\">serverSocket<\/span><span class=\"o\">.<\/span><span class=\"na\">accept<\/span><span class=\"o\">();<\/span>\n            <span class=\"kt\">byte<\/span><span class=\"o\">[]<\/span> <span class=\"n\">buf<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"kt\">byte<\/span><span class=\"o\">[<\/span><span class=\"mi\">1024<\/span><span class=\"o\">];<\/span>\n            <span class=\"nc\">InputStream<\/span> <span class=\"n\">is<\/span> <span class=\"o\">=<\/span>  <span class=\"n\">socket<\/span><span class=\"o\">.<\/span><span class=\"na\">getInputStream<\/span><span class=\"o\">();<\/span>\n            <span class=\"nc\">ByteArrayOutputStream<\/span> <span class=\"n\">os<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ByteArrayOutputStream<\/span><span class=\"o\">();<\/span>\n            <span class=\"kt\">int<\/span> <span class=\"n\">n<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span>\n            <span class=\"k\">while<\/span> <span class=\"o\">((<\/span><span class=\"n\">n<\/span> <span class=\"o\">=<\/span> <span class=\"n\">is<\/span><span class=\"o\">.<\/span><span class=\"na\">read<\/span><span class=\"o\">(<\/span><span class=\"n\">buf<\/span><span class=\"o\">))<\/span> <span class=\"o\">&gt;<\/span> <span class=\"o\">-<\/span><span class=\"mi\">1<\/span><span class=\"o\">){<\/span>\n                <span class=\"n\">os<\/span><span class=\"o\">.<\/span><span class=\"na\">write<\/span><span class=\"o\">(<\/span><span class=\"n\">buf<\/span><span class=\"o\">,<\/span><span class=\"mi\">0<\/span><span class=\"o\">,<\/span><span class=\"n\">n<\/span><span class=\"o\">);<\/span>\n            <span class=\"o\">}<\/span>\n            <span class=\"n\">os<\/span><span class=\"o\">.<\/span><span class=\"na\">close<\/span><span class=\"o\">();<\/span>\n            <span class=\"n\">is<\/span><span class=\"o\">.<\/span><span class=\"na\">close<\/span><span class=\"o\">();<\/span>\n            <span class=\"n\">socket<\/span><span class=\"o\">.<\/span><span class=\"na\">close<\/span><span class=\"o\">();<\/span>\n            <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">os<\/span><span class=\"o\">);<\/span>\n        <span class=\"o\">}<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">IOException<\/span> <span class=\"o\">{<\/span>\n        <span class=\"k\">new<\/span> <span class=\"nf\">HttpPrint<\/span><span class=\"o\">().<\/span><span class=\"na\">show<\/span><span class=\"o\">();<\/span>\n    <span class=\"o\">}<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u7528html\u9875\u9762\u6765\u53d1\u9001get\u4e0epost\u8bf7\u6c42<\/p>\n\n<div class=\"language-html highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"nt\">&lt;a<\/span> <span class=\"na\">href=<\/span><span class=\"s\">\"http:\/\/localhost:8080\/hsp?param=\u4f60\u597d\u5168\u4e16\u754c\"<\/span><span class=\"nt\">&gt;<\/span>Test<span class=\"nt\">&lt;\/a&gt;<\/span>\n<span class=\"nt\">&lt;form<\/span> <span class=\"na\">action=<\/span><span class=\"s\">\"http:\/\/localhost:8080\/hsp\"<\/span> <span class=\"na\">method=<\/span><span class=\"s\">\"post\"<\/span><span class=\"nt\">&gt;<\/span>\n   <span class=\"nt\">&lt;input<\/span> <span class=\"na\">type=<\/span><span class=\"s\">\"text\"<\/span> <span class=\"na\">name=<\/span><span class=\"s\">\"param\"<\/span> <span class=\"na\">value=<\/span><span class=\"s\">\"\u4f60\u597d\u5168\u4e16\u754c\"<\/span><span class=\"nt\">\/&gt;<\/span>\n   <span class=\"nt\">&lt;input<\/span> <span class=\"na\">type=<\/span><span class=\"s\">\"submit\"<\/span><span class=\"nt\">\/&gt;<\/span>\n<span class=\"nt\">&lt;\/form&gt;<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u542f\u52a8\u670d\u52a1\u5668\u540e\uff0c\u67e5\u770b\u6253\u5370\u5185\u5bb9\uff0c\u5728\u6211\u7684\u673a\u5668\u4e0a\uff0c\u8bf7\u6c42\u5185\u5bb9\u5982\u4e0b:<\/p>\n\n<p>get<\/p>\n\n<p><img src=\"https:\/\/bit-ranger.github.io\/blog\/static\/img\/servlet-encode\/get.png\" alt=\"get\" \/><\/p>\n\n<p>post<\/p>\n\n<p><img src=\"https:\/\/bit-ranger.github.io\/blog\/static\/img\/servlet-encode\/post.png\" alt=\"post\" \/><\/p>\n\n<p>\u4ecepost\u4e2d\u7684<code class=\"language-plaintext highlighter-rouge\">Content-Type:application\/x-www-form-urlencoded<\/code>\u53ef\u4ee5\u770b\u5230\uff0c\u867d\u7136\u6570\u636e\u4e3a\u4e2d\u6587\uff0c\u4f46\u662f\u5728\u4f20\u9012\u7684\u65f6\u5019\uff0c\u7ecf\u8fc7\u4e86\u4e00\u6b21urlEncode\uff0c\u8fd9\u6837\u4e00\u6765\uff0c\u5728\u6570\u636e\u4ea4\u6362\u5c42\u9762\u5c31\u53ef\u4ee5\u5c4f\u853d\u7f16\u7801\u7684\u4e0d\u4e00\u81f4\u6027\u3002<\/p>\n\n<h1 id=\"urlencode\">UrlEncode<\/h1>\n\n<p><code class=\"language-plaintext highlighter-rouge\">urlEncode<\/code>\u7684\u4efb\u52a1\u662f\u5c06form\u4e2d\u7684\u6570\u636e\u8fdb\u884c\u7f16\u7801, \u7f16\u7801\u8fc7\u7a0b\u975e\u5e38\u7b80\u5355, \u4efb\u4f55\u5b57\u7b26\u53ea\u8981\u4e0d\u662f<code class=\"language-plaintext highlighter-rouge\">ASCII<\/code>\u7801, \u5b83\u4eec\u90fd\u5c06\u88ab\u8f6c\u6362\u6210\u5b57\u8282\u5f62\u5f0f, \u6bcf\u4e2a\u5b57\u8282\u90fd\u5199\u6210\u8fd9\u79cd\u5f62\u5f0f\uff1a\u4e00\u4e2a \u201c%\u201d \u540e\u9762\u8ddf\u7740\u4e24\u4f4d16\u8fdb\u5236\u7684\u6570\u503c\u3002\nurlEncode\u53ea\u80fd\u8bc6\u522bASCII\u7801\uff0c\u53ef\u4ee5\u60f3\u8c61\u7684\u662f\uff0c\u90a3\u4e9burlEncode\u4e0d\u80fd\u8bc6\u522b\u7684\u5b57\u7b26\uff0c\u4e5f\u5c31\u662f\u5341\u516d\u8fdb\u5236\u6570\uff0c\u4e00\u5b9a\u662f\u4f9d\u8d56\u4e8e\u7279\u5b9a\u7684\u5b57\u7b26\u96c6\u4ea7\u751f\u7684, \u5b57\u7b26\u96c6\u5305\u62ecunicode,iso\u7b49\u3002<\/p>\n\n<p>\u90a3\u4e48\u6d4f\u89c8\u5668\u7528\u7684\u662f\u4ec0\u4e48\u5b57\u7b26\u96c6\u5462? \u7b54\u6848\u662f\uff1a\u9ed8\u8ba4\u4e0e<code class=\"language-plaintext highlighter-rouge\">contentType<\/code>\u76f8\u540c, form\u53ef\u4ee5\u901a\u8fc7\u5c5e\u6027<code class=\"language-plaintext highlighter-rouge\">accept-charset<\/code>\u6307\u5b9a\u3002<\/p>\n\n<p>\u4f8b\u5982\u6211\u4eec\u901a\u5e38\u53ef\u4ee5\u5728jsp\u4e2d\u770b\u5230\u8fd9\u6837\u7684\u8bbe\u7f6e:<\/p>\n\n<div class=\"language-jsp highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"nt\">&lt;%@page <\/span><span class=\"na\">contentType=<\/span><span class=\"s\">\"text\/html;charset=UTF-8\"<\/span> <span class=\"nt\">%&gt;<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u6216\u8005\u5728html\u4e2d\u8fd9\u6837\u8bbe\u7f6e:<\/p>\n\n<div class=\"language-html highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"nt\">&lt;meta<\/span> <span class=\"na\">http-equiv=<\/span><span class=\"s\">\"Content-Type\"<\/span> <span class=\"na\">content=<\/span><span class=\"s\">\"text\/html; charset=UTF-8\"<\/span> <span class=\"nt\">\/&gt;<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u8fd9\u8868\u793a\u6d4f\u89c8\u5668\u5f97\u5230\u54cd\u5e94\u6d41\u4e4b\u540e\uff0c\u7528contentType\u6307\u5b9a\u7684\u5b57\u7b26\u96c6\uff0c\u5c06\u6d41\u4e2d\u7684\u5b57\u8282\u8f6c\u6362\u4e3a\u5b57\u7b26\uff0c\u540c\u6837\u5730\uff0c\u4e5f\u4f1a\u7528\u8fd9\u4e2a\u5b57\u7b26\u96c6\u5c06\u9875\u9762\u4e2d\u5b57\u7b26\u8f6c\u6362\u4e3a\u5b57\u8282\u3002<\/p>\n\n<p>\u5173\u4e8e\u6d4f\u89c8\u5668\u8bbe\u5b9a\u5b57\u7b26\u96c6\u7684\u95ee\u9898\uff0c\u6211\u4eec\u4e0d\u8fc7\u591a\u8ba8\u8bba\uff0c\u73b0\u5728\u53ea\u9700\u8981\u77e5\u9053\u6709\u8fd9\u4e48\u4e2a\u8fc7\u7a0b\u5c31\u884c\u4e86, \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u65e0\u8bba\u6d4f\u89c8\u5668\u4f7f\u7528\u4ec0\u4e48\u5b57\u7b26\u96c6\uff0c\u670d\u52a1\u7aef\u90fd\u662f\u65e0\u6cd5\u83b7\u77e5\u7684\u3002\n\u8fd9\u91cc\u9700\u8981\u6362\u4f4d\u8003\u8651\u4e00\u4e0b\uff0c\u6d4f\u89c8\u5668\u662f\u4e00\u4e2a\u5ba2\u6237\u7aef\uff0c\u5e94\u8be5\u8ba9\u5ba2\u6237\u7aef \u201c\u8fc1\u5c31\u201d \u670d\u52a1\u7aef, \u6240\u4ee5\u6d4f\u89c8\u5668\u8bf7\u6c42\u4e00\u4e2a\u670d\u52a1\u7684\u65f6\u5019\uff0c\u5e94\u8be5\u8ba9\u6d4f\u89c8\u5668\u8003\u8651\u670d\u52a1\u7aef\u652f\u6301\u4ec0\u4e48\u5b57\u7b26\u96c6, \u5f97\u5230\u4e86\u54cd\u5e94\u540e, \u7528\u670d\u52a1\u7aef\u544a\u8bc9\u6d4f\u89c8\u5668\u7684\u5b57\u7b26\u96c6\u8fdb\u884c\u89e3\u6790\u3002<\/p>\n\n<h1 id=\"urldecode\">UrlDecode<\/h1>\n\n<p>\u73b0\u5728\u6211\u4eec\u5c06\u76ee\u5149\u8f6c\u5411Servlet, \u5e76\u4f7f\u7528\u4e0a\u9762\u7684html\u6765\u8bf7\u6c42\u670d\u52a1\uff0c\u8bf7\u786e\u4fdd\u8bf7\u6c42\u7684\u5b57\u7b26\u96c6\u4e3a<code class=\"language-plaintext highlighter-rouge\">unicode<\/code>, \u5e94\u7528\u670d\u52a1\u5668\u4f7f\u7528tomcat6\u3002<\/p>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">HttpServletPrint<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">HttpServlet<\/span><span class=\"o\">{<\/span>\n    <span class=\"nd\">@Override<\/span>\n    <span class=\"kd\">protected<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">doPost<\/span><span class=\"o\">(<\/span><span class=\"nc\">HttpServletRequest<\/span> <span class=\"n\">req<\/span><span class=\"o\">,<\/span> <span class=\"nc\">HttpServletResponse<\/span> <span class=\"n\">resp<\/span><span class=\"o\">)<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">ServletException<\/span><span class=\"o\">,<\/span> <span class=\"nc\">IOException<\/span> <span class=\"o\">{<\/span>\n        <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">req<\/span><span class=\"o\">.<\/span><span class=\"na\">getParameter<\/span><span class=\"o\">(<\/span><span class=\"s\">\"param\"<\/span><span class=\"o\">));<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"nd\">@Override<\/span>\n    <span class=\"kd\">protected<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">doGet<\/span><span class=\"o\">(<\/span><span class=\"nc\">HttpServletRequest<\/span> <span class=\"n\">req<\/span><span class=\"o\">,<\/span> <span class=\"nc\">HttpServletResponse<\/span> <span class=\"n\">resp<\/span><span class=\"o\">)<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">ServletException<\/span><span class=\"o\">,<\/span> <span class=\"nc\">IOException<\/span> <span class=\"o\">{<\/span>\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">doPost<\/span><span class=\"o\">(<\/span><span class=\"n\">req<\/span><span class=\"o\">,<\/span><span class=\"n\">resp<\/span><span class=\"o\">);<\/span>\n    <span class=\"o\">}<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>get\u4e0epost\u7ed3\u679c\u5982\u4e0b\uff0c\u679c\u7136\u5982\u9884\u6599\u4e2d\u4e71\u7801\u4e86\u3002<\/p>\n\n<p><img src=\"https:\/\/bit-ranger.github.io\/blog\/static\/img\/servlet-encode\/param.png\" alt=\"param\" \/><\/p>\n\n<p>\u73b0\u5728\u6211\u4eec\u4eceServlet\u4e2d\u770b\u770b\u8bf7\u6c42\u4f53, \u4fee\u6539\u4e0a\u9762\u7684Servlet\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">HttpServletPrint<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">HttpServlet<\/span><span class=\"o\">{<\/span>\n    <span class=\"nd\">@Override<\/span>\n    <span class=\"kd\">protected<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">doPost<\/span><span class=\"o\">(<\/span><span class=\"nc\">HttpServletRequest<\/span> <span class=\"n\">req<\/span><span class=\"o\">,<\/span> <span class=\"nc\">HttpServletResponse<\/span> <span class=\"n\">resp<\/span><span class=\"o\">)<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">ServletException<\/span><span class=\"o\">,<\/span> <span class=\"nc\">IOException<\/span> <span class=\"o\">{<\/span>\n        <span class=\"c1\">\/\/System.out.println(req.getParameter(\"param\"));<\/span>\n        <span class=\"kt\">byte<\/span><span class=\"o\">[]<\/span> <span class=\"n\">buf<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"kt\">byte<\/span><span class=\"o\">[<\/span><span class=\"mi\">1024<\/span><span class=\"o\">];<\/span>\n        <span class=\"kt\">int<\/span> <span class=\"n\">n<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span>\n        <span class=\"nc\">ByteArrayOutputStream<\/span> <span class=\"n\">bos<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ByteArrayOutputStream<\/span><span class=\"o\">();<\/span>\n        <span class=\"nc\">InputStream<\/span> <span class=\"n\">is<\/span> <span class=\"o\">=<\/span> <span class=\"n\">req<\/span><span class=\"o\">.<\/span><span class=\"na\">getInputStream<\/span><span class=\"o\">();<\/span>\n        <span class=\"k\">while<\/span> <span class=\"o\">((<\/span><span class=\"n\">n<\/span> <span class=\"o\">=<\/span> <span class=\"n\">is<\/span><span class=\"o\">.<\/span><span class=\"na\">read<\/span><span class=\"o\">(<\/span><span class=\"n\">buf<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"n\">buf<\/span><span class=\"o\">.<\/span><span class=\"na\">length<\/span><span class=\"o\">))&gt;-<\/span><span class=\"mi\">1<\/span><span class=\"o\">){<\/span>\n            <span class=\"n\">bos<\/span><span class=\"o\">.<\/span><span class=\"na\">write<\/span><span class=\"o\">(<\/span><span class=\"n\">buf<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"n\">n<\/span><span class=\"o\">);<\/span>\n        <span class=\"o\">}<\/span>\n        <span class=\"nc\">String<\/span> <span class=\"n\">param<\/span> <span class=\"o\">=<\/span> <span class=\"n\">bos<\/span><span class=\"o\">.<\/span><span class=\"na\">toString<\/span><span class=\"o\">();<\/span>\n        <span class=\"nc\">String<\/span> <span class=\"n\">s<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">URLDecoder<\/span><span class=\"o\">.<\/span><span class=\"na\">decode<\/span><span class=\"o\">(<\/span><span class=\"n\">param<\/span><span class=\"o\">,<\/span><span class=\"s\">\"utf-8\"<\/span><span class=\"o\">);<\/span>\n        <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">s<\/span><span class=\"o\">);<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"nd\">@Override<\/span>\n    <span class=\"kd\">protected<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">doGet<\/span><span class=\"o\">(<\/span><span class=\"nc\">HttpServletRequest<\/span> <span class=\"n\">req<\/span><span class=\"o\">,<\/span> <span class=\"nc\">HttpServletResponse<\/span> <span class=\"n\">resp<\/span><span class=\"o\">)<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">ServletException<\/span><span class=\"o\">,<\/span> <span class=\"nc\">IOException<\/span> <span class=\"o\">{<\/span>\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">doPost<\/span><span class=\"o\">(<\/span><span class=\"n\">req<\/span><span class=\"o\">,<\/span><span class=\"n\">resp<\/span><span class=\"o\">);<\/span>\n    <span class=\"o\">}<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>get\u4e0epost\u7ed3\u679c\u5982\u4e0b,Servlet\u5c06http\u5934\u90e8\u89e3\u6790\u5b8c\u6210\u540e\uff0c\u5c06\u8bf7\u6c42\u4f53\u7559\u4e86\u4e0b\u6765\u4f9b\u5e94\u7528\u7a0b\u5e8f\u4f7f\u7528, \u8fd9\u662f\u8003\u8651\u5230http\u8bf7\u6c42\u53ef\u80fd\u6709\u591a\u79cd <a href=\"http:\/\/www.w3school.com.cn\/tags\/att_form_enctype.asp\">enctype<\/a> , \u8bf7\u6c42\u4f53\u7684\u7ed3\u6784\u53ef\u80fd\u4e0d\u540c,\n\u4f8b\u5982\uff0c<code class=\"language-plaintext highlighter-rouge\">multipart\/form-data<\/code>\u5c31\u4e0d\u662f\u8fd9\u6837\u7684key=value\u7ed3\u6784\uff0c\u5173\u4e8emultipart\/form-data\uff0c\u6211\u5728\u8fd9\u7bc7 <a href=\"https:\/\/bit-ranger.github.io\/blog\/web\/2014-03-15\/file-upload\">fileupload<\/a> \u4e2d\u66fe\u6709\u8fc7\u7b80\u8981\u5206\u6790\u3002<\/p>\n\n<p><img src=\"https:\/\/bit-ranger.github.io\/blog\/static\/img\/servlet-encode\/body-utf.png\" alt=\"body-utf\" \/><\/p>\n\n<p>\u4ece\u56fe\u4e2d\u53ef\u4ee5\u770b\u5230, \u8bbe\u7f6e\u4e86\u6b63\u786e\u7684\u5b57\u7b26\u96c6\u540e, \u670d\u52a1\u7aef\u5c06\u80fd\u591f\u6b63\u786e\u5730\u89e3\u6790, get\u90e8\u5206\u4ec0\u4e48\u90fd\u6ca1\u6709\uff0c\u8fd9\u662f\u56e0\u4e3aget\u6ca1\u6709\u8bf7\u6c42\u4f53\u3002<\/p>\n\n<p>\u8ba9\u6211\u4eec\u6362\u79cd\u5b57\u7b26\u96c6\u8bd5\u8bd5, \u6bd4\u5982, \u5c06servet\u4e2d\u7684\u201dutf-8\u201d\u6362\u6210\u201diso-8859-1\u201d\u3002<\/p>\n\n<p><img src=\"https:\/\/bit-ranger.github.io\/blog\/static\/img\/servlet-encode\/body-iso.png\" alt=\"body-iso\" \/><\/p>\n\n<p>\u563f\uff0c\u679c\u7136\u5982\u6211\u6240\u6599\uff0c\u800c\u4e14\u8fd9\u4e2a\u5b57\u7b26\u4e32\u597d\u50cf\u5f88\u773c\u719f\uff0c\u548creq.getParameter(\u201cparam\u201d)\u7ed3\u679c\u662f\u4e00\u6837\u7684\uff0c\u6ca1\u9519\uff0c\u4e8b\u5b9e\u4e0a\uff0ctomcat\u9ed8\u8ba4\u7684\u5b57\u7b26\u96c6\u5c31\u662f<code class=\"language-plaintext highlighter-rouge\">iso-8859-1<\/code>, \u6211\u4eec\u4ece\u4e2d\u53ef\u4ee5\u5f97\u5230\u4e00\u4e2a\u63a8\u8bba\uff0ctomcat\u4f7f\u7528\u9ed8\u8ba4\u7684\u5b57\u7b26\u96c6\uff0c\u5bf9http\u8bf7\u6c42\u8fdb\u884c\u8fc7\u4e00\u6b21decode\u3002<\/p>\n\n<h1 id=\"\u65b9\u6848\">\u65b9\u6848<\/h1>\n\n<p><code class=\"language-plaintext highlighter-rouge\">urlDecode<\/code>\u7684\u4efb\u52a1\u662f\u5c06\u8bf7\u6c42\u4e2d\u7684\u767e\u5206\u53f7\u7801\u8f6c\u6362\u6210\u5b57\u7b26\uff0c\u663e\u800c\u6613\u89c1\u7684\u662f\uff0c\u4f7f\u7528\u4e0e<code class=\"language-plaintext highlighter-rouge\">urlEncode<\/code>\u65f6\u76f8\u540c\u7684\u5b57\u7b26\u96c6\u624d\u80fd\u6210\u529f\u8f6c\u6362\u3002\u901a\u5e38\u7684\u505a\u6cd5\u662f\uff0c\u8ba9\u670d\u52a1\u7aef\u652f\u6301\u6db5\u76d6\u591a\u56fd\u8bed\u8a00\u7684\u201dutf-8\u201d\uff0c\u7136\u540e\u8ba9\u5ba2\u6237\u7aef\u4e5f\u7528\u201dutf-8\u201d\u8bf7\u6c42\u670d\u52a1\u3002<\/p>\n\n<p>\u6307\u5b9a\u670d\u52a1\u7aef\u5b57\u7b26\u96c6\u7684\u65b9\u5f0f\u6709\u4e24\u79cd\uff0c\u4e00\u662f\u4fee\u6539\u5e94\u7528\u670d\u52a1\u5668\u7684\u9ed8\u8ba4\u7f16\u7801\uff0c\u4e8c\u662f\u6dfb\u52a0\u4e00\u4e2a\u8fc7\u6ee4\u5668\u8fdb\u884c\u7f16\u7801\u8f6c\u6362, \u65b9\u6cd5\u4e00\u6700\u65b9\u4fbf, \u4f46\u662f\u5f71\u54cd\u4e86\u7a0b\u5e8f\u7684\u53ef\u79fb\u690d\u6027, \u65b9\u6cd5\u4e8c\u53ef\u79fb\u690d, \u5b83\u53ea\u9700\u8981\u505a\u4e00\u4ef6\u4e8b:<code class=\"language-plaintext highlighter-rouge\">requet.setCharacterEncoding(\"UTF-8\");<\/code>,\n\u5b9e\u9645\u4e0a\uff0c\u8be5\u8fc7\u6ee4\u5668\u5e76\u6ca1\u6709\u8fdb\u884c\u4efb\u4f55\u7f16\u7801\u8f6c\u6362\u7684\u5de5\u4f5c\uff0c\u5b83\u4ec5\u4ec5\u53ea\u662f\u4e00\u4e2a\u914d\u7f6e\uff0c\u8be5\u914d\u7f6e\u9879\u5c06\u88ab\u540e\u7eed\u7a0b\u5e8f\u4f7f\u7528\uff0c\u8fd9\u4e9b\u540e\u7eed\u7a0b\u5e8f\u5305\u62ecweb\u670d\u52a1\u5668\u5185\u7f6e\u7684\u89e3\u6790\u7a0b\u5e8f\uff0c\u4ee5\u53ca\u7b2c\u4e09\u65b9\u89e3\u6790\u5de5\u5177\u7b49\u3002<\/p>\n\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0crequet.setCharacterEncoding(\u201cUTF-8\u201d);\uff0c\u53ea\u5bf9\u8bf7\u6c42\u4f53\u6709\u6548\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u8bf7\u6c42\u5934\u4e0d\u5f52\u5b83\u7ba1\uff0c\u800c\u662f\u7531web\u670d\u52a1\u5668\u91c7\u7528\u81ea\u5df1\u914d\u7f6e\u7684\u5b57\u7b26\u7f16\u7801\u8fdb\u884c\u89e3\u6790\uff0c\u6b64\u65f6\u5982\u679curl\u4e2d\u5305\u542b\u4e2d\u6587\uff08\u5982get\u8bf7\u6c42\u7684\u53c2\u6570\uff09\uff0c\u90a3\u4e48\u5c06\u4e0d\u53ef\u907f\u514d\u5730\u51fa\u73b0\u5b57\u7b26\u4e22\u5931\u3002\n\u89e3\u51b3\u529e\u6cd5\u662f\u5728\u5ba2\u6237\u7aef\u5bf9url\u8fdb\u884c<code class=\"language-plaintext highlighter-rouge\">encodeURI<\/code><strong>\u4e24\u6b21<\/strong>, \u7136\u540e\u518d\u5728\u670d\u52a1\u7aef<code class=\"language-plaintext highlighter-rouge\">URLDecoder.decode(param,\"utf-8\");<\/code>\u3002<\/p>\n\n<p>\u4e3a\u4ec0\u4e48\u8981 <a href=\"http:\/\/www.w3school.com.cn\/jsref\/jsref_encodeuri.asp\">encodeURI<\/a> \u4e24\u6b21\uff1ftalk is cheap\uff0c let\u2019s code\uff01<\/p>\n\n<p><img src=\"https:\/\/bit-ranger.github.io\/blog\/static\/img\/servlet-encode\/encodeURI.png\" alt=\"encodeURI\" \/><\/p>\n\n<p>\u6ce8\u610f\u89c2\u5bdf\u8fd9\u5f20\u56fe\u7247\uff0c\u4ece\u4e2d\u53d1\u73b0\u4e86\u4ec0\u4e48? \u6ca1\u9519\uff0c\u7b2c\u4e00\u6b21encodeURI\u751f\u6210\u4e86HTTP\u4e00\u8282\u7684\u793a\u4f8b\u4e2d\u4e00\u6837\u7684\u7ed3\u679c\u3002\n\u6211\u4eec\u5728\u6d4f\u89c8\u5668\u7a97\u53e3\u4e2d\u8f93\u5165 \u201chttp:\/\/localhost:8080\/hsp?param=%E4%BD%A0%E5%A5%BD%E5%85%A8%E4%B8%96%E7%95%8C\u201d, \u4f1a\u53d1\u73b0\u5b83\u53d8\u6210\u4e86 \u201chttp:\/\/localhost:8080\/hsp?param=\u4f60\u597d\u5168\u4e16\u754c\u201d,\n\u5728url\u91cc\uff0c\u6d4f\u89c8\u5668\u8ba4\u4e3a%\u662f\u4e2a\u8f6c\u4e49\u5b57\u7b26\uff0c\u6d4f\u89c8\u5668\u4f1a\u628a%\u4e0e%\u4e4b\u95f4\u7684\u7f16\u7801\uff0c\u4e24\u4f4d\u4e24\u4f4d\u53d6\u51fa\u540e\u8fdb\u884cdecode, \u4e5f\u5c31\u662f\u53d8\u56de \u201c\u4f60\u597d\u5168\u4e16\u754c\u201d, \u7136\u540e\u518d\u7528\u8fd9\u4e2aurl\u53d1\u9001\u8bf7\u6c42, \u6700\u7ec8\u5b9e\u9645\u53d1\u9001\u7684\u5185\u5bb9\u5b9e\u9645\u4e0a\u8fd8\u662f<code class=\"language-plaintext highlighter-rouge\">%E4%BD%A0%E5%A5%BD%E5%85%A8%E4%B8%96%E7%95%8C<\/code>\u3002\n\u6362\u8a00\u4e4b\uff0c\u4ee5\u660e\u6587\u4f20\u9012\u7684\u8fd9\u79cdurl\u4f1a\u88ab\u6d4f\u89c8\u5668\u5426\u51b3\u4e00\u6b21\uff0c\u518d\u6362\u8a00\u4e4b\uff0c\u5728js\u4e2d\u8fdb\u884c\u4e00\u6b21encodeURI\u7b49\u4e8e\u4ec0\u4e48\u90fd\u6ca1\u505a\u3002<\/p>\n\n<p>\u518d\u6ce8\u610f\u89c2\u5bdf\u7b2c2\u548c\u7b2c3\u4e2a\u8f93\u51fa\uff0c\u6709\u4ec0\u4e48\u89c4\u5f8b? \u662f\u7684\uff0c\u4ece\u7b2c\u4e8c\u6b21\u5f00\u59cbencodeURI\u53ea\u662f\u5c06<code class=\"language-plaintext highlighter-rouge\">%<\/code>\u53d8\u6210\u4e86<code class=\"language-plaintext highlighter-rouge\">%25<\/code>\uff0c\n\u6839\u636e\u6211\u4eec\u521a\u624d\u603b\u7ed3\u51fa\u7684\u89c4\u5f8b\u53ef\u77e5\uff0c\u5728encodeURI\u4e24\u6b21\u7684\u60c5\u51b5\u4e0b\uff0c\u6700\u540e\u53d1\u9001\u5230\u6d4f\u89c8\u5668\u4e2d\u7684\u6570\u636e\u4e3a<code class=\"language-plaintext highlighter-rouge\">%25E4%25BD%25A0%25E5%25A5%25BD%25E5%2585%25A8%25E4%25B8%2596%25E7%2595%258C<\/code>,\n\u7406\u6240\u5f53\u7136\u7684\uff0cweb\u670d\u52a1\u5668\u5c06\u4f7f\u7528\u9ed8\u8ba4\u7684\u5b57\u7b26\u96c6\u5bf9\u5176decode, \u7136\u800c, \u65e0\u8bba\u9009\u62e9\u54ea\u79cd\u5b57\u7b26\u96c6, \u5c06<code class=\"language-plaintext highlighter-rouge\">%25<\/code>\u8f6c\u6362\u6210<code class=\"language-plaintext highlighter-rouge\">%<\/code>\u603b\u662f\u4e0d\u4f1a\u51fa\u9519\u7684, decode\u4e4b\u540e\uff0c<code class=\"language-plaintext highlighter-rouge\">%E4%BD%A0%E5%A5%BD%E5%85%A8%E4%B8%96%E7%95%8C<\/code> \u5c06\u5b8c\u6574\u5730\u9001\u5230Servlet\u624b\u4e0a\u3002<\/p>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"nc\">URLDecoder<\/span><span class=\"o\">.<\/span><span class=\"na\">decode<\/span><span class=\"o\">(<\/span><span class=\"n\">req<\/span><span class=\"o\">.<\/span><span class=\"na\">getParameter<\/span><span class=\"o\">(<\/span><span class=\"s\">\"param\"<\/span><span class=\"o\">),<\/span><span class=\"s\">\"utf-8\"<\/span><span class=\"o\">));<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<div class=\"language-javascript highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"nb\">window<\/span><span class=\"p\">.<\/span><span class=\"nx\">location<\/span><span class=\"p\">.<\/span><span class=\"nx\">href<\/span><span class=\"o\">=<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">http:\/\/localhost:8080\/hsp?param=<\/span><span class=\"dl\">\"<\/span> <span class=\"o\">+<\/span> <span class=\"nb\">encodeURI<\/span><span class=\"p\">(<\/span><span class=\"nb\">encodeURI<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">\u4f60\u597d\u5168\u4e16\u754c<\/span><span class=\"dl\">'<\/span><span class=\"p\">));<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p><img src=\"https:\/\/bit-ranger.github.io\/blog\/static\/img\/servlet-encode\/world.png\" alt=\"world\" \/><\/p>\n\n","pubDate":"Sat, 05 Apr 2014 00:00:00 +0000","link":"https:\/\/bit-ranger.github.io\/blog\/web\/encode-decode\/","guid":"https:\/\/bit-ranger.github.io\/blog\/web\/encode-decode\/","category":["servlet","encode","Java","web"]},{"title":"\u89e3\u6790HTTP, \u5b9e\u73b0\u6587\u4ef6\u4e0a\u4f20","description":"<ul id=\"markdown-toc\">\n  <li><a href=\"#http\" id=\"markdown-toc-http\">HTTP<\/a><\/li>\n  <li><a href=\"#\u5206\u6790\" id=\"markdown-toc-\u5206\u6790\">\u5206\u6790<\/a><\/li>\n  <li><a href=\"#\u8bbe\u8ba1\" id=\"markdown-toc-\u8bbe\u8ba1\">\u8bbe\u8ba1<\/a><\/li>\n  <li><a href=\"#\u5173\u952e\u4ee3\u7801\" id=\"markdown-toc-\u5173\u952e\u4ee3\u7801\">\u5173\u952e\u4ee3\u7801<\/a><\/li>\n  <li><a href=\"#\u6e90\u7801\u83b7\u53d6\" id=\"markdown-toc-\u6e90\u7801\u83b7\u53d6\">\u6e90\u7801\u83b7\u53d6<\/a><\/li>\n<\/ul>\n\n<p>\u672c\u6587\u7684\u76ee\u7684\u662f\u7b80\u8981\u8bf4\u660e\u5982\u4f55\u7f16\u5199\u4e00\u4e2a\u6587\u4ef6\u4e0a\u4f20\u7ec4\u4ef6\uff0c\u4f7f\u4ed6\u7684\u529f\u80fd\u7c7b\u4f3c <a href=\"https:\/\/github.com\/apache\/commons-fileupload\">commons-fileupload<\/a>, \u5e76\u5728\u7ed3\u5c3e\u5904\u63d0\u4f9b\u4e86\u5b8c\u6574\u4ee3\u7801\u7684\u83b7\u53d6\u65b9\u5f0f\u3002<\/p>\n\n<h1 id=\"http\">HTTP<\/h1>\n<p>\u672c\u6587\u8ba8\u8bba\u7684\u662f\u57fa\u4e8e HTTP \u534f\u8bae\u7684\u6587\u4ef6\u4e0a\u4f20\uff0c\u4e0b\u9762\u5148\u6765\u770b\u770b HTTP \u8bf7\u6c42\u7684\u771f\u9762\u76ee\u3002<\/p>\n\n<p>\u9996\u5148\uff0c\u7528 JavaSe \u7c7b\u5e93\u4e2d\u7684 Socket \u642d\u5efa\u4e00\u4e2a\u8d85\u7b80\u5355\u7684\u670d\u52a1\u5668\uff0c\u8fd9\u4e2a\u670d\u52a1\u5668\u53ea\u6709\u4e00\u4e2a\u529f\u80fd\uff0c\u5c31\u662f\u5b8c\u6574\u5730\u6253\u5370\u6574\u4e2a HTTP \u8bf7\u6c42\u4f53\u3002<\/p>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Server<\/span> <span class=\"o\">{<\/span>\n\n    <span class=\"kd\">private<\/span> <span class=\"nc\">ServerSocket<\/span> <span class=\"n\">serverSocket<\/span><span class=\"o\">;<\/span>\n\n    <span class=\"kd\">public<\/span> <span class=\"nf\">Server<\/span><span class=\"o\">()<\/span> <span class=\"kd\">throws<\/span>  <span class=\"nc\">IOException<\/span><span class=\"o\">{<\/span>\n        <span class=\"n\">serverSocket<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ServerSocket<\/span><span class=\"o\">(<\/span><span class=\"mi\">8080<\/span><span class=\"o\">);<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">show<\/span><span class=\"o\">()<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">IOException<\/span><span class=\"o\">{<\/span>\n        <span class=\"k\">while<\/span><span class=\"o\">(<\/span><span class=\"kc\">true<\/span><span class=\"o\">){<\/span>\n            <span class=\"nc\">Socket<\/span> <span class=\"n\">socket<\/span> <span class=\"o\">=<\/span> <span class=\"n\">serverSocket<\/span><span class=\"o\">.<\/span><span class=\"na\">accept<\/span><span class=\"o\">();<\/span>\n            <span class=\"kt\">byte<\/span><span class=\"o\">[]<\/span> <span class=\"n\">buf<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"kt\">byte<\/span><span class=\"o\">[<\/span><span class=\"mi\">1024<\/span><span class=\"o\">];<\/span>\n            <span class=\"nc\">InputStream<\/span> <span class=\"n\">is<\/span> <span class=\"o\">=<\/span>  <span class=\"n\">socket<\/span><span class=\"o\">.<\/span><span class=\"na\">getInputStream<\/span><span class=\"o\">();<\/span>\n            <span class=\"nc\">OutputStream<\/span> <span class=\"n\">os<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ByteArrayOutputStream<\/span><span class=\"o\">();<\/span>\n            <span class=\"kt\">int<\/span> <span class=\"n\">n<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span>\n            <span class=\"k\">while<\/span> <span class=\"o\">((<\/span><span class=\"n\">n<\/span> <span class=\"o\">=<\/span> <span class=\"n\">is<\/span><span class=\"o\">.<\/span><span class=\"na\">read<\/span><span class=\"o\">(<\/span><span class=\"n\">buf<\/span><span class=\"o\">))<\/span> <span class=\"o\">&gt;<\/span> <span class=\"o\">-<\/span><span class=\"mi\">1<\/span><span class=\"o\">){<\/span>\n                <span class=\"n\">os<\/span><span class=\"o\">.<\/span><span class=\"na\">write<\/span><span class=\"o\">(<\/span><span class=\"n\">buf<\/span><span class=\"o\">,<\/span><span class=\"mi\">0<\/span><span class=\"o\">,<\/span><span class=\"n\">n<\/span><span class=\"o\">);<\/span>\n            <span class=\"o\">}<\/span>\n            <span class=\"n\">os<\/span><span class=\"o\">.<\/span><span class=\"na\">close<\/span><span class=\"o\">();<\/span>\n            <span class=\"n\">is<\/span><span class=\"o\">.<\/span><span class=\"na\">close<\/span><span class=\"o\">();<\/span>\n            <span class=\"n\">socket<\/span><span class=\"o\">.<\/span><span class=\"na\">close<\/span><span class=\"o\">();<\/span>\n\n            <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">os<\/span><span class=\"o\">);<\/span>\n        <span class=\"o\">}<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">IOException<\/span> <span class=\"o\">{<\/span>\n        <span class=\"k\">new<\/span> <span class=\"nf\">Server<\/span><span class=\"o\">().<\/span><span class=\"na\">show<\/span><span class=\"o\">();<\/span>\n    <span class=\"o\">}<\/span>\n\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u5c06\u670d\u52a1\u5668\u8fd0\u884c\u8d77\u6765\u4e4b\u540e\uff0c\u5728\u6d4f\u89c8\u5668\u4e2d\u8f93\u5165\u5730\u5740\uff1a<code class=\"language-plaintext highlighter-rouge\">http:\/\/localhost:8080<\/code><\/p>\n\n<p>\u5728\u6211\u7684\u673a\u5668\u4e0a\uff0c\u663e\u793a\u5982\u4e0b\u5185\u5bb9\uff0c\u53ef\u4ee5\u770b\u5230\uff0c\u8fd9\u4e2a\u4e00\u4e2aget\u8bf7\u6c42<\/p>\n\n<p><img src=\"https:\/\/bit-ranger.github.io\/blog\/static\/img\/http-get.png\" alt=\"http-get\" \/><\/p>\n\n<p>\u4e0b\u9762\u5229\u7528\u4e00\u4e2a html \u7684 form\u8868\u5355\u63d0\u4ea4 post \u8bf7\u6c42<\/p>\n\n<div class=\"language-html highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code>    <span class=\"nt\">&lt;form<\/span> <span class=\"na\">action=<\/span><span class=\"s\">\"http:\/\/localhost:8080\"<\/span> <span class=\"na\">method=<\/span><span class=\"s\">\"post\"<\/span> <span class=\"na\">enctype=<\/span><span class=\"s\">\"multipart\/form-data\"<\/span><span class=\"nt\">&gt;<\/span>\n       <span class=\"nt\">&lt;input<\/span> <span class=\"na\">type=<\/span><span class=\"s\">\"text\"<\/span> <span class=\"na\">name=<\/span><span class=\"s\">\"time\"<\/span> <span class=\"na\">value=<\/span><span class=\"s\">\"1970-01-01\"<\/span><span class=\"nt\">\/&gt;<\/span>\n        <span class=\"nt\">&lt;input<\/span> <span class=\"na\">type=<\/span><span class=\"s\">\"file\"<\/span> <span class=\"na\">name=<\/span><span class=\"s\">\"file\"<\/span><span class=\"nt\">\/&gt;<\/span>\n        <span class=\"nt\">&lt;input<\/span> <span class=\"na\">type=<\/span><span class=\"s\">\"submit\"<\/span><span class=\"nt\">\/&gt;<\/span>\n    <span class=\"nt\">&lt;\/form&gt;<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p>\u5728\u6211\u7684\u673a\u5668\u4e0a\uff0c\u663e\u793a\u5982\u4e0b\u5185\u5bb9<\/p>\n\n<p><img src=\"https:\/\/bit-ranger.github.io\/blog\/static\/img\/http-post.png\" alt=\"http-post\" \/><\/p>\n\n<p>\u6ce8\u610f\u56fe\u4e2d\u88ab\u7ea2\u8272\u6846\u8d77\u6765\u7684\u90e8\u5206\uff0c\u7b2c\u4e00\u4e2a\u7ea2\u6846\u6307\u793a\u4e86\u672c\u6b21\u8bf7\u6c42\u4e2d\uff0c\u7528\u6765\u5206\u9694\u4e0d\u540c\u5143\u7d20\u7684\u5206\u9694\u7ebf\u3002<\/p>\n\n<p>\u6bcf\u4e2a\u5143\u7d20\u5c06\u4ee5\u6b64\u5206\u9694\u7ebf\u4f5c\u4e3a\u7b2c\u4e00\u884c\uff0c\u540e\u9762\u7d27\u8ddf\u5bf9\u5143\u7d20\u7684\u63cf\u8ff0\uff0c\u63cf\u8ff0\u4e0e\u5185\u5bb9\u7528\u7a7a\u884c\u5206\u9694\u3002<\/p>\n\n<p>\u5206\u9694\u7ebf\u7684\u540e\u9762\u52a0\u4e24\u4e2a\u5c0f\u77ed\u6a2a\u4ee3\u8868\u6574\u4e2a\u8bf7\u6c42\u4f53\u7ed3\u675f\uff0c\u5373<strong>EOF<\/strong>\u3002<\/p>\n\n<p>\u6211\u4eec\u9700\u8981\u505a\u7684\u5de5\u4f5c\uff0c\u5c31\u662f\u5229\u7528\u5206\u9694\u7ebf\uff0c\u4ece\u8bf7\u6c42\u4f53\u4e2d\u5206\u79bb\u51fa\u6bcf\u4e2a\u5143\u7d20\uff0c\u5206\u6790HTTP\u8bf7\u6c42\u5934\u7684\u5de5\u4f5c\u53ef\u4ee5\u4ea4\u7ed9Servlet\u3002<\/p>\n\n<h1 id=\"\u5206\u6790\">\u5206\u6790<\/h1>\n\n<p>\u90a3\u4e48\uff0c\u5982\u4f55\u5206\u79bb\u5462\uff1f<\/p>\n\n<p>java\u4e2d\u7684 <code class=\"language-plaintext highlighter-rouge\">InputStream<\/code> \u53ea\u80fd\u8bfb\u53d6\u4e00\u6b21\uff0c\u6240\u4ee5\u6211\u4eec\u60f3\u8981\u65b9\u4fbf\u5730\u5206\u6790\u4e00\u4e2a\u6d41\uff0c\u6700\u76f4\u63a5\u7684\u529e\u6cd5\u5c31\u662f\u5c06\u5176\u7f13\u5b58\u4e0b\u6765\u3002<\/p>\n\n<p>RandomAccessFile \u6216\u8bb8\u80fd\u591f\u6ee1\u8db3\u9700\u6c42\uff0cRandomAccessFile \u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e2a\u6307\u9488\u7528\u4e8e\u5728\u6587\u4ef6\u4e2d\u7684\u968f\u610f\u79fb\u52a8\uff0c\u7136\u800c\u9700\u8981\u8bfb\u5199\u672c\u5730\u6587\u4ef6\u7684\u65b9\u6848\u4e0d\u4f1a\u662f\u6700\u4f18\u65b9\u6848\u3002<\/p>\n\n<p>\u5148\u5c06\u6574\u4e2a\u6d41\u8bfb\u4e00\u904d\u5c06\u5185\u5bb9\u7f13\u5b58\u5230\u5185\u5b58\u4e2d\uff1f \u8fd9\u79cd\u65b9\u6848\u5728\u591a\u4e2a\u5ba2\u6237\u7aef\u540c\u65f6\u63d0\u4ea4\u5927\u6587\u4ef6\u65f6\u4e00\u5b9a\u662f\u4e0d\u53ef\u9760\u7684\u3002<\/p>\n\n<p>\u6700\u7406\u60f3\u7684\u65b9\u6848\u53ef\u80fd\u662f\uff0c\u6211\u53ea\u9700\u8981\u8bfb\u4e00\u904d <code class=\"language-plaintext highlighter-rouge\">InputStream<\/code> , \u8bfb\u5b8c\u540e\u5c06\u5f97\u5230\u4e00\u4e2a\u6709\u5e8f\u5217\u8868\uff0c\u5217\u8868\u4e2d\u5b58\u653e\u6bcf\u4e2a\u5143\u7d20\u5bf9\u8c61\u3002<\/p>\n\n<p>\u5f88\u660e\u663e\uff0cJavaSe\u7684\u6d41\u6ca1\u6709\u63d0\u4f9b\u8fd9\u4e2a\u529f\u80fd<\/p>\n\n<p>\u6211\u4eec\u77e5\u9053\u4ece <code class=\"language-plaintext highlighter-rouge\">InputStreeam<\/code> \u4e2d\u83b7\u53d6\u5185\u5bb9\u9700\u8981\u4f7f\u7528 <code class=\"language-plaintext highlighter-rouge\">read<\/code> \u65b9\u6cd5\uff0c\u8fd4\u56de <code class=\"language-plaintext highlighter-rouge\">-1<\/code> \u8868\u793a\u8bfb\u5230\u4e86\u6d41\u7684\u672b\u5c3e\uff0c\u5982\u679c\u6211\u4eec\u589e\u5f3a\u4e00\u4e0b<code class=\"language-plaintext highlighter-rouge\">read<\/code>\u7684\u529f\u80fd\uff0c\u8ba9\u5176\u5728\u8bfb\u5230\u6bcf\u4e2a\u5143\u7d20\u672b\u5c3e\u7684\u65f6\u5019\u8fd4\u56de <code class=\"language-plaintext highlighter-rouge\">-1<\/code>\uff0c\u8fd9\u6837\u4e0d\u5c31\u53ef\u4ee5\u5206\u79bb\u51fa\u6bcf\u4e2a\u5143\u7d20\u4e86\u5417\uff0c\u81f3\u4e8e\u5224\u65ad\u662f\u5426\u5230\u4e86\u6574\u4e2a\u6d41\u7684\u672b\u5c3e\uff0c\u81ea\u6709\u529e\u6cd5\u3002<\/p>\n\n<h1 id=\"\u8bbe\u8ba1\">\u8bbe\u8ba1<\/h1>\n\n<p>\u5982\u4f55\u589e\u5f3a<code class=\"language-plaintext highlighter-rouge\">read<\/code>\u65b9\u6cd5\u5462\uff1f<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">read<\/code>\u65b9\u6cd5\u8981\u5728\u8bfb\u5230\u5143\u7d20\u672b\u5c3e\u65f6\u8fd4\u56de<code class=\"language-plaintext highlighter-rouge\">-1<\/code> , \u4e00\u5b9a\u9700\u8981\u5148\u5bf9\u5df2\u8bfb\u53d6\u7684\u5185\u5bb9\u8fdb\u884c\u5206\u6790\uff0c\u5224\u65ad\u662f\u5426\u5143\u7d20\u672b\u5c3e\u3002<\/p>\n\n<p>\u6211\u7684\u505a\u6cd5\u662f\uff0c\u5185\u90e8\u7ef4\u62a4\u4e00\u4e2abuffer\uff0c<code class=\"language-plaintext highlighter-rouge\">read<\/code>\u65b9\u6cd5\u5728\u8bfb\u53d6\u65f6\u5148\u5c06\u5b57\u8282\u5199\u5165\u5230\u8fd9\u4e2abuffer\u4e2d\uff0c\u7136\u540e\u5206\u6790\u5176\u4e2d\u662f\u5426\u5b58\u5728\u5206\u9694\u7ebf\uff0c\u7136\u540e\u5c06buffer\u4e2d\u53ef\u7528\u7684\u5143\u7d20\u590d\u5236\u5230\u5ba2\u6237\u7aef\u63d0\u4f9b\u7684buffer\u3002<\/p>\n\n<p>\u8fd9\u4e2a\u5185\u90e8\u7ef4\u62a4\u7684buffer\u5e76\u4e0d\u603b\u662f\u6ee1\u7684\uff0c\u5176\u4e2d\u7684\u5b57\u8282\u6765\u81earead\u65b9\u6cd5\u7684\u539f\u59cb\u529f\u80fd\uff0c\u6240\u4ee5\u6211\u4eec\u9700\u8981\u4e00\u4e2a\u53d8\u91cf\u6765\u8bb0\u5f55buffer\u4e2d\u6709\u6548\u5b57\u8282\u7684\u672b\u5c3e\u4f4d\u7f6e <code class=\"language-plaintext highlighter-rouge\">tail<\/code>\u3002<\/p>\n\n<p>\u6211\u4eec\u8fd8\u9700\u8981\u4e00\u4e2a\u53d8\u91cf <code class=\"language-plaintext highlighter-rouge\">pos<\/code> \u6765\u6807\u8bb0buffer\u4e2d\u662f\u5426\u5b58\u5728\u5206\u9694\u7ebf\uff0cpos\u7684\u503c\u5373\u4e3a\u5206\u9694\u7ebf\u7684\u5f00\u5934\u5728buffer\u4e2d\u7684\u4f4d\u7f6e\uff0c\u5982\u679cbuffer\u4e2d\u4e0d\u5b58\u5728\u5206\u9694\u7ebfpos\u7684\u503c\u5c06\u4e3a-1\u3002<\/p>\n\n<p>\u4f46\u662f\u95ee\u9898\u6ca1\u8fd9\u4e2a\u7b80\u5355\uff0c\u5206\u9694\u7ebf\u5728buffer\u4e2d\u5b58\u5728\u72b6\u6001\u6709\u4e24\u79cd\u60c5\u51b5\uff1a<\/p>\n\n<p>\u60c5\u51b5A\uff0c\u5206\u9694\u7ebf\u5b8c\u597d\u5730\u5b58\u5728\u4e8ebuffer\u4e2d\uff0c\u56fe\u4e2d\u7684bundary\u5373\u4e3a\u5206\u9694\u7ebf<\/p>\n\n<p><img src=\"https:\/\/bit-ranger.github.io\/blog\/static\/img\/boundary-A.png\" alt=\"boundary-A\" \/><\/p>\n\n<p>\u60c5\u51b5B\uff0c\u5206\u9694\u7ebf\u7684\u4e00\u90e8\u5206\u5b58\u5728\u4e8ebuffer\u4e2d<\/p>\n\n<p><img src=\"https:\/\/bit-ranger.github.io\/blog\/static\/img\/boundary-B.png\" alt=\"boundary-B\" \/><\/p>\n\n<p>\u5728B\u60c5\u51b5\u4e0b\uff0c<code class=\"language-plaintext highlighter-rouge\">boundary<\/code>\u6709\u591a\u5c11\u5b57\u8282\u5b58\u5728\u4e8ebuffer\u4e2d\u662f\u4e0d\u786e\u5b9a\u7684\uff0c\u800c\u4e14\u4f9d\u9760\u8fd9\u4e9b\u4e0d\u5b8c\u6574\u7684\u5b57\u8282\u6839\u672c\u65e0\u6cd5\u5224\u65ad\u4ed6\u662f\u5426\u5c5e\u4e8eboundary\u5f00\u5934\u3002<\/p>\n\n<p>\u4f8b\u5982\uff0cbuffer\u4e2d\u6ca1\u6709\u53d1\u73b0boundary\uff0c\u4f46\u662fbuffer\u672b\u5c3e\u76843\u4e2a\u5b57\u8282\u4e0eboundary\u5f00\u5934\u76f8\u540c\uff0c\u8fd9\u79cd\u60c5\u51b5\u53ef\u80fd\u53ea\u662f\u5de7\u5408\uff0cboundary\u5e76\u6ca1\u6709\u88ab\u622a\u65ad\u3002<\/p>\n\n<p>\u5bf9\u4e8e\u8fd9\u4e2a\u95ee\u9898\uff0c\u6709\u4e00\u4e2a\u89e3\u51b3\u529e\u6cd5\uff0c\u6211\u4eec\u4e0d\u5fc5\u68c0\u67e5\u5230buffer\u672b\u5c3e\uff0c\u800c\u662f\u5728buffer\u672b\u5c3e\u7559\u4e00\u4e2a\u5173\u5065\u533a<code class=\"language-plaintext highlighter-rouge\">pad<\/code>\u3002<\/p>\n\n<p>\u8fd9\u4e2a\u5173\u5065\u533a\u4e2d\u5f88\u6709\u53ef\u80fd\u5b58\u5728\u88ab\u622a\u65adboundary\uff0c\u6bcf\u6b21\u68c0\u67e5\u5230<code class=\"language-plaintext highlighter-rouge\">pad<\/code>\u5f00\u5934\u65f6\u7acb\u5373\u6536\u624b\uff0c\u6b64\u4f4d\u7f6e\u4e4b\u524d\u7684\u6570\u636e\u53ef\u4ee5\u786e\u4fdd\u6ca1\u6709boundary\uff0c\u5728\u4e0b\u6b21\u586b\u5145buffer\u65f6\uff0c\u5c06\u8fd9\u4e2a\u5173\u5065\u533a\u4e2d\u7684\u6570\u636e\u590d\u5236\u5230buffer\u5f00\u5934\u518d\u5904\u7406\u3002\u5f88\u663e\u7136\uff0c\u5173\u5065\u533a<code class=\"language-plaintext highlighter-rouge\">pad<\/code>\u957f\u5ea6\u5e94\u8be5\u7b49\u4e8eboundary\uff0c\u5982\u56fe\uff1a<\/p>\n\n<p><img src=\"https:\/\/bit-ranger.github.io\/blog\/static\/img\/boundary-C.png\" alt=\"pad\" \/><\/p>\n\n<h1 id=\"\u5173\u952e\u4ee3\u7801\">\u5173\u952e\u4ee3\u7801<\/h1>\n\n<p><strong>\u5728buffer\u4e2d\u68c0\u67e5boundary<\/strong><\/p>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"kd\">private<\/span> <span class=\"kt\">int<\/span> <span class=\"nf\">findSeparator<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\n    <span class=\"kt\">int<\/span> <span class=\"n\">first<\/span><span class=\"o\">;<\/span>\n    <span class=\"kt\">int<\/span> <span class=\"n\">match<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span>\n    <span class=\"c1\">\/\/\u82e5buffer\u4e2dhead\u81f3tail\u4e4b\u95f4\u7684\u5b57\u8282\u6570\u5c0f\u4e8eboundaryLength,\u90a3\u4e48maxpos\u5c06\u5c0f\u4e8ehead,\u5faa\u73af\u5c06\u4e0d\u4f1a\u8fd0\u884c,\u8fd4\u56de\u503c\u4e3a-1<\/span>\n    <span class=\"kt\">int<\/span> <span class=\"n\">maxpos<\/span> <span class=\"o\">=<\/span> <span class=\"n\">tail<\/span> <span class=\"o\">-<\/span> <span class=\"n\">boundaryLength<\/span><span class=\"o\">;<\/span>\n    <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"n\">first<\/span> <span class=\"o\">=<\/span> <span class=\"n\">head<\/span><span class=\"o\">;<\/span> <span class=\"n\">first<\/span> <span class=\"o\">&lt;=<\/span> <span class=\"n\">maxpos<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"n\">match<\/span> <span class=\"o\">!=<\/span> <span class=\"n\">boundaryLength<\/span><span class=\"o\">;<\/span> <span class=\"n\">first<\/span><span class=\"o\">++)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"n\">first<\/span> <span class=\"o\">=<\/span> <span class=\"n\">findByte<\/span><span class=\"o\">(<\/span><span class=\"n\">boundary<\/span><span class=\"o\">[<\/span><span class=\"mi\">0<\/span><span class=\"o\">],<\/span> <span class=\"n\">first<\/span><span class=\"o\">);<\/span>\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">first<\/span> <span class=\"o\">==<\/span> <span class=\"o\">-<\/span><span class=\"mi\">1<\/span> <span class=\"o\">||<\/span> <span class=\"n\">first<\/span> <span class=\"o\">&gt;<\/span> <span class=\"n\">maxpos<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n            <span class=\"k\">return<\/span> <span class=\"o\">-<\/span><span class=\"mi\">1<\/span><span class=\"o\">;<\/span>\n        <span class=\"o\">}<\/span>\n        <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"n\">match<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"o\">;<\/span> <span class=\"n\">match<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">boundaryLength<\/span><span class=\"o\">;<\/span> <span class=\"n\">match<\/span><span class=\"o\">++)<\/span> <span class=\"o\">{<\/span>\n            <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">buffer<\/span><span class=\"o\">[<\/span><span class=\"n\">first<\/span> <span class=\"o\">+<\/span> <span class=\"n\">match<\/span><span class=\"o\">]<\/span> <span class=\"o\">!=<\/span> <span class=\"n\">boundary<\/span><span class=\"o\">[<\/span><span class=\"n\">match<\/span><span class=\"o\">])<\/span> <span class=\"o\">{<\/span>\n                <span class=\"k\">break<\/span><span class=\"o\">;<\/span>\n            <span class=\"o\">}<\/span>\n        <span class=\"o\">}<\/span>\n    <span class=\"o\">}<\/span>\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">match<\/span> <span class=\"o\">==<\/span> <span class=\"n\">boundaryLength<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"k\">return<\/span> <span class=\"n\">first<\/span> <span class=\"o\">-<\/span> <span class=\"mi\">1<\/span><span class=\"o\">;<\/span>\n    <span class=\"o\">}<\/span>\n    <span class=\"k\">return<\/span> <span class=\"o\">-<\/span><span class=\"mi\">1<\/span><span class=\"o\">;<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p><strong>\u586b\u5145buffer<\/strong><\/p>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"kd\">private<\/span> <span class=\"kt\">int<\/span> <span class=\"nf\">makeAvailable<\/span><span class=\"o\">()<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">IOException<\/span> <span class=\"o\">{<\/span>\n    <span class=\"c1\">\/\/\u8be5\u65b9\u6cd5\u5728available\u8fd4\u56de0\u65f6\u624d\u4f1a\u88ab\u8c03\u7528,\u82e5pos!=-1\u90a3pos==head,\u8868\u793aboundary\u5904\u4e8ehead\u4f4d,\u53ef\u7528\u5b57\u8282\u6570\u4e3a0<\/span>\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">pos<\/span> <span class=\"o\">!=<\/span> <span class=\"o\">-<\/span><span class=\"mi\">1<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"k\">return<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"c1\">\/\/ \u5c06pad\u4f4d\u4e4b\u540e\u7684\u6570\u636e\u79fb\u52a8\u5230buffer\u5f00\u5934<\/span>\n    <span class=\"n\">total<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">tail<\/span> <span class=\"o\">-<\/span> <span class=\"n\">head<\/span> <span class=\"o\">-<\/span> <span class=\"n\">pad<\/span><span class=\"o\">;<\/span>\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">arraycopy<\/span><span class=\"o\">(<\/span><span class=\"n\">buffer<\/span><span class=\"o\">,<\/span> <span class=\"n\">tail<\/span> <span class=\"o\">-<\/span> <span class=\"n\">pad<\/span><span class=\"o\">,<\/span> <span class=\"n\">buffer<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"n\">pad<\/span><span class=\"o\">);<\/span>\n\n    <span class=\"c1\">\/\/ \u5c06buffer\u586b\u6ee1<\/span>\n    <span class=\"n\">head<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span>\n    <span class=\"n\">tail<\/span> <span class=\"o\">=<\/span> <span class=\"n\">pad<\/span><span class=\"o\">;<\/span>\n    <span class=\"c1\">\/\/\u5faa\u73af\u8bfb\u53d6\u6570\u636e,\u76f4\u81f3\u5c06buffer\u586b\u6ee1,\u5728\u6b64\u8fc7\u7a0b\u4e2d,\u6bcf\u6b21\u8bfb\u53d6\u90fd\u5c06\u68c0\u7d22buffer\u4e2d\u662f\u5426\u5b58\u5728boundary,\u65e0\u8bba\u5b58\u5728\u4e0e\u5426,\u90fd\u5c06\u5373\u65f6\u8fd4\u56de\u53ef\u7528\u6570\u636e\u91cf<\/span>\n    <span class=\"k\">for<\/span> <span class=\"o\">(;;)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"kt\">int<\/span> <span class=\"n\">bytesRead<\/span> <span class=\"o\">=<\/span> <span class=\"n\">input<\/span><span class=\"o\">.<\/span><span class=\"na\">read<\/span><span class=\"o\">(<\/span><span class=\"n\">buffer<\/span><span class=\"o\">,<\/span> <span class=\"n\">tail<\/span><span class=\"o\">,<\/span> <span class=\"n\">bufSize<\/span> <span class=\"o\">-<\/span> <span class=\"n\">tail<\/span><span class=\"o\">);<\/span>\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">bytesRead<\/span> <span class=\"o\">==<\/span> <span class=\"o\">-<\/span><span class=\"mi\">1<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n            <span class=\"c1\">\/\/\u7406\u8bba\u4e0a\u56e0\u4e3a\u4f1a\u5bf9buffer\u4e0d\u65ad\u8fdb\u884c\u68c0\u7d22,\u8bfb\u5230boundary\u65f6\u5c31\u4f1areturn 0,read\u65b9\u6cd5\u5c06\u8fd4\u56de -1,<\/span>\n            <span class=\"c1\">\/\/\u6240\u4ee5\u4e0d\u4f1a\u8bfb\u5230input\u672b\u5c3e,\u5982\u679c\u8fd0\u884c\u5230\u4e86\u8fd9\u91cc,\u8868\u793a\u53d1\u751f\u4e86\u9519\u8bef.<\/span>\n            <span class=\"kd\">final<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">msg<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"Stream ended unexpectedly\"<\/span><span class=\"o\">;<\/span>\n            <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">RuntimeException<\/span><span class=\"o\">(<\/span><span class=\"n\">msg<\/span><span class=\"o\">);<\/span>\n        <span class=\"o\">}<\/span>\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">notifier<\/span> <span class=\"o\">!=<\/span> <span class=\"kc\">null<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n            <span class=\"n\">notifier<\/span><span class=\"o\">.<\/span><span class=\"na\">noteBytesRead<\/span><span class=\"o\">(<\/span><span class=\"n\">bytesRead<\/span><span class=\"o\">);<\/span>\n        <span class=\"o\">}<\/span>\n        <span class=\"n\">tail<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">bytesRead<\/span><span class=\"o\">;<\/span>\n        <span class=\"n\">findSeparator<\/span><span class=\"o\">();<\/span>\n        <span class=\"c1\">\/\/\u82e5buffer\u4e2d\u7684\u6570\u636e\u91cf\u5c0f\u4e8ekeepRegion(boundaryLength),av\u5c06\u5fc5\u5b9a\u7b49\u4e8e0,\u5faa\u73af\u5c06\u7ee7\u7eed,\u76f4\u81f3\u6570\u636e\u91cf\u5927\u4e8e\u6216\u7b49\u4e8ekeepRegion(boundaryLength).<\/span>\n        <span class=\"c1\">\/\/\u6b64\u65f6\u5c06\u68c0\u7d22buffer\u4e2d\u662f\u5426\u5305\u542bboundary,\u82e5\u5305\u542b,\u5c06\u8fd4\u56deboundary\u6240\u5728\u4f4d\u7f6epos\u4e4b\u524d\u7684\u6570\u636e\u91cf,\u82e5\u4e0d\u5305\u542b,\u5c06\u8fd4\u56depad\u4f4d\u4e4b\u524d\u7684\u6570\u636e\u91cf<\/span>\n        <span class=\"kt\">int<\/span> <span class=\"n\">av<\/span> <span class=\"o\">=<\/span> <span class=\"n\">available<\/span><span class=\"o\">();<\/span>\n\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">av<\/span> <span class=\"o\">&gt;<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">||<\/span> <span class=\"n\">pos<\/span> <span class=\"o\">!=<\/span> <span class=\"o\">-<\/span><span class=\"mi\">1<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n            <span class=\"k\">return<\/span> <span class=\"n\">av<\/span><span class=\"o\">;<\/span>\n        <span class=\"o\">}<\/span>\n    <span class=\"o\">}<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<p><strong>\u5f3a\u5316\u540e\u7684read\u65b9\u6cd5<\/strong><\/p>\n\n<div class=\"language-java highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code><span class=\"nd\">@Override<\/span>\n<span class=\"kd\">public<\/span> <span class=\"kt\">int<\/span> <span class=\"nf\">read<\/span><span class=\"o\">(<\/span><span class=\"kt\">byte<\/span><span class=\"o\">[]<\/span> <span class=\"n\">b<\/span><span class=\"o\">,<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">off<\/span><span class=\"o\">,<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">len<\/span><span class=\"o\">)<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">IOException<\/span> <span class=\"o\">{<\/span>\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">closed<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">RuntimeException<\/span><span class=\"o\">(<\/span><span class=\"s\">\"the stream is closed\"<\/span><span class=\"o\">);<\/span>\n    <span class=\"o\">}<\/span>\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">len<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"k\">return<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span>\n    <span class=\"o\">}<\/span>\n    <span class=\"kt\">int<\/span> <span class=\"n\">res<\/span> <span class=\"o\">=<\/span> <span class=\"n\">available<\/span><span class=\"o\">();<\/span>\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">res<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"n\">res<\/span> <span class=\"o\">=<\/span> <span class=\"n\">makeAvailable<\/span><span class=\"o\">();<\/span>\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">res<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n            <span class=\"k\">return<\/span> <span class=\"o\">-<\/span><span class=\"mi\">1<\/span><span class=\"o\">;<\/span>\n        <span class=\"o\">}<\/span>\n    <span class=\"o\">}<\/span>\n    <span class=\"n\">res<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Math<\/span><span class=\"o\">.<\/span><span class=\"na\">min<\/span><span class=\"o\">(<\/span><span class=\"n\">res<\/span><span class=\"o\">,<\/span> <span class=\"n\">len<\/span><span class=\"o\">);<\/span>\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">arraycopy<\/span><span class=\"o\">(<\/span><span class=\"n\">buffer<\/span><span class=\"o\">,<\/span> <span class=\"n\">head<\/span><span class=\"o\">,<\/span> <span class=\"n\">b<\/span><span class=\"o\">,<\/span> <span class=\"n\">off<\/span><span class=\"o\">,<\/span> <span class=\"n\">res<\/span><span class=\"o\">);<\/span>\n    <span class=\"n\">head<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">res<\/span><span class=\"o\">;<\/span>\n    <span class=\"n\">total<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">res<\/span><span class=\"o\">;<\/span>\n    <span class=\"k\">return<\/span> <span class=\"n\">res<\/span><span class=\"o\">;<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre><\/div><\/div>\n\n<h1 id=\"\u6e90\u7801\u83b7\u53d6\">\u6e90\u7801\u83b7\u53d6<\/h1>\n\n<p>\u6211\u5df2\u7ecf\u6309\u7167\u8fd9\u5957\u60f3\u6cd5\u5b8c\u6574\u5730\u5b9e\u73b0\u4e86\u6587\u4ef6\u4e0a\u4f20\u7ec4\u4ef6<\/p>\n\n<p>\u6709\u5174\u8da3\u7684\u670b\u53cb\u53ef\u4ee5\u4ece\u6211\u7684Gighub\u83b7\u53d6\u6e90\u7801 <a href=\"https:\/\/github.com\/bit-ranger\/http-multipart\/releases\">\u70b9\u6211\u83b7\u53d6<\/a><\/p>\n\n<p>\u4f7f\u7528\u65b9\u6cd5\uff1a<a href=\"https:\/\/github.com\/bit-ranger\/http-multipart\">\u70b9\u6211\u67e5\u770b<\/a><\/p>\n\n","pubDate":"Sat, 15 Mar 2014 00:00:00 +0000","link":"https:\/\/bit-ranger.github.io\/blog\/web\/file-upload\/","guid":"https:\/\/bit-ranger.github.io\/blog\/web\/file-upload\/","category":["file-upload","Java","Http","multi-part","web"]},{"title":"Effective Java","description":"<ul id=\"markdown-toc\">\n  <li><a href=\"#\u4e00-\u521b\u5efa\u548c\u9500\u6bc1\u5bf9\u8c61\" id=\"markdown-toc-\u4e00-\u521b\u5efa\u548c\u9500\u6bc1\u5bf9\u8c61\"><code class=\"language-plaintext highlighter-rouge\">\u4e00<\/code> \u521b\u5efa\u548c\u9500\u6bc1\u5bf9\u8c61<\/a>    <ul>\n      <li><a href=\"#1\u8003\u8651\u7528\u9759\u6001\u5de5\u5382\u65b9\u6cd5\u4ee3\u66ff\u6784\u9020\u5668\" id=\"markdown-toc-1\u8003\u8651\u7528\u9759\u6001\u5de5\u5382\u65b9\u6cd5\u4ee3\u66ff\u6784\u9020\u5668\"><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u8003\u8651\u7528\u9759\u6001\u5de5\u5382\u65b9\u6cd5\u4ee3\u66ff\u6784\u9020\u5668<\/a><\/li>\n      <li><a href=\"#2\u9047\u5230\u591a\u4e2a\u6784\u9020\u5668\u53c2\u6570\u65f6\u8981\u8003\u8651\u7528\u6784\u5efa\u5668\" id=\"markdown-toc-2\u9047\u5230\u591a\u4e2a\u6784\u9020\u5668\u53c2\u6570\u65f6\u8981\u8003\u8651\u7528\u6784\u5efa\u5668\"><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u9047\u5230\u591a\u4e2a\u6784\u9020\u5668\u53c2\u6570\u65f6\u8981\u8003\u8651\u7528\u6784\u5efa\u5668<\/a><\/li>\n      <li><a href=\"#3\u7528\u79c1\u6709\u6784\u9020\u5668\u6216\u8005\u679a\u4e3e\u7c7b\u578b\u5f3a\u5316singleton\u5c5e\u6027\" id=\"markdown-toc-3\u7528\u79c1\u6709\u6784\u9020\u5668\u6216\u8005\u679a\u4e3e\u7c7b\u578b\u5f3a\u5316singleton\u5c5e\u6027\"><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u7528\u79c1\u6709\u6784\u9020\u5668\u6216\u8005\u679a\u4e3e\u7c7b\u578b\u5f3a\u5316Singleton\u5c5e\u6027<\/a><\/li>\n      <li><a href=\"#4\u901a\u8fc7\u79c1\u6709\u6784\u9020\u5668\u5f3a\u5316\u4e0d\u53ef\u5b9e\u4f8b\u5316\u7684\u80fd\u529b\" id=\"markdown-toc-4\u901a\u8fc7\u79c1\u6709\u6784\u9020\u5668\u5f3a\u5316\u4e0d\u53ef\u5b9e\u4f8b\u5316\u7684\u80fd\u529b\"><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u901a\u8fc7\u79c1\u6709\u6784\u9020\u5668\u5f3a\u5316\u4e0d\u53ef\u5b9e\u4f8b\u5316\u7684\u80fd\u529b<\/a><\/li>\n      <li><a href=\"#5\u907f\u514d\u521b\u5efa\u4e0d\u5fc5\u8981\u7684\u5bf9\u8c61\" id=\"markdown-toc-5\u907f\u514d\u521b\u5efa\u4e0d\u5fc5\u8981\u7684\u5bf9\u8c61\"><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u907f\u514d\u521b\u5efa\u4e0d\u5fc5\u8981\u7684\u5bf9\u8c61<\/a><\/li>\n      <li><a href=\"#6\u6d88\u9664\u8fc7\u671f\u7684\u5bf9\u8c61\u5f15\u7528\" id=\"markdown-toc-6\u6d88\u9664\u8fc7\u671f\u7684\u5bf9\u8c61\u5f15\u7528\"><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u6d88\u9664\u8fc7\u671f\u7684\u5bf9\u8c61\u5f15\u7528<\/a><\/li>\n      <li><a href=\"#7\u907f\u514d\u4f7f\u7528\u7ec8\u7ed3\u65b9\u6cd5\" id=\"markdown-toc-7\u907f\u514d\u4f7f\u7528\u7ec8\u7ed3\u65b9\u6cd5\"><code class=\"language-plaintext highlighter-rouge\">7<\/code>.\u907f\u514d\u4f7f\u7528\u7ec8\u7ed3\u65b9\u6cd5<\/a><\/li>\n    <\/ul>\n  <\/li>\n  <li><a href=\"#\u4e8c-\u901a\u7528\u65b9\u6cd5\" id=\"markdown-toc-\u4e8c-\u901a\u7528\u65b9\u6cd5\"><code class=\"language-plaintext highlighter-rouge\">\u4e8c<\/code> \u901a\u7528\u65b9\u6cd5<\/a>    <ul>\n      <li><a href=\"#8\u8986\u76d6equals\u65f6\u8bf7\u9075\u5b88\u901a\u7528\u7ea6\u5b9a\" id=\"markdown-toc-8\u8986\u76d6equals\u65f6\u8bf7\u9075\u5b88\u901a\u7528\u7ea6\u5b9a\"><code class=\"language-plaintext highlighter-rouge\">8<\/code>.\u8986\u76d6equals\u65f6\u8bf7\u9075\u5b88\u901a\u7528\u7ea6\u5b9a<\/a><\/li>\n      <li><a href=\"#9\u8986\u76d6equals\u65f6\u603b\u8981\u8986\u76d6hashcode\" id=\"markdown-toc-9\u8986\u76d6equals\u65f6\u603b\u8981\u8986\u76d6hashcode\"><code class=\"language-plaintext highlighter-rouge\">9<\/code>.\u8986\u76d6equals\u65f6\u603b\u8981\u8986\u76d6hashCode<\/a><\/li>\n      <li><a href=\"#10\u59cb\u7ec8\u8981\u8986\u76d6tostring\" id=\"markdown-toc-10\u59cb\u7ec8\u8981\u8986\u76d6tostring\"><code class=\"language-plaintext highlighter-rouge\">10<\/code>.\u59cb\u7ec8\u8981\u8986\u76d6toString<\/a><\/li>\n      <li><a href=\"#11\u8c28\u614e\u5730\u8986\u76d6clone\" id=\"markdown-toc-11\u8c28\u614e\u5730\u8986\u76d6clone\"><code class=\"language-plaintext highlighter-rouge\">11<\/code>.\u8c28\u614e\u5730\u8986\u76d6clone<\/a><\/li>\n      <li><a href=\"#12\u8003\u8651\u5b9e\u73b0comparable\u63a5\u53e3\" id=\"markdown-toc-12\u8003\u8651\u5b9e\u73b0comparable\u63a5\u53e3\"><code class=\"language-plaintext highlighter-rouge\">12<\/code>.\u8003\u8651\u5b9e\u73b0Comparable\u63a5\u53e3<\/a><\/li>\n    <\/ul>\n  <\/li>\n  <li><a href=\"#\u4e09-\u7c7b\u548c\u63a5\u53e3\" id=\"markdown-toc-\u4e09-\u7c7b\u548c\u63a5\u53e3\"><code class=\"language-plaintext highlighter-rouge\">\u4e09<\/code> \u7c7b\u548c\u63a5\u53e3<\/a>    <ul>\n      <li><a href=\"#13\u4f7f\u7c7b\u548c\u6210\u5458\u7684\u53ef\u8bbf\u95ee\u6027\u6700\u5c0f\u5316\" id=\"markdown-toc-13\u4f7f\u7c7b\u548c\u6210\u5458\u7684\u53ef\u8bbf\u95ee\u6027\u6700\u5c0f\u5316\"><code class=\"language-plaintext highlighter-rouge\">13<\/code>.\u4f7f\u7c7b\u548c\u6210\u5458\u7684\u53ef\u8bbf\u95ee\u6027\u6700\u5c0f\u5316<\/a><\/li>\n      <li><a href=\"#14\u5728\u516c\u6709\u7c7b\u4e2d\u4f7f\u7528\u8bbf\u95ee\u65b9\u6cd5\u800c\u975e\u516c\u6709\u57df\" id=\"markdown-toc-14\u5728\u516c\u6709\u7c7b\u4e2d\u4f7f\u7528\u8bbf\u95ee\u65b9\u6cd5\u800c\u975e\u516c\u6709\u57df\"><code class=\"language-plaintext highlighter-rouge\">14<\/code>.\u5728\u516c\u6709\u7c7b\u4e2d\u4f7f\u7528\u8bbf\u95ee\u65b9\u6cd5\u800c\u975e\u516c\u6709\u57df<\/a><\/li>\n      <li><a href=\"#15\u4f7f\u53ef\u53d8\u6027\u6700\u5c0f\u5316\" id=\"markdown-toc-15\u4f7f\u53ef\u53d8\u6027\u6700\u5c0f\u5316\"><code class=\"language-plaintext highlighter-rouge\">15<\/code>.\u4f7f\u53ef\u53d8\u6027\u6700\u5c0f\u5316<\/a><\/li>\n      <li><a href=\"#16\u590d\u5408\u4f18\u5148\u4e8e\u7ee7\u627f\" id=\"markdown-toc-16\u590d\u5408\u4f18\u5148\u4e8e\u7ee7\u627f\"><code class=\"language-plaintext highlighter-rouge\">16<\/code>.\u590d\u5408\u4f18\u5148\u4e8e\u7ee7\u627f<\/a><\/li>\n      <li><a href=\"#17\u8981\u4e48\u4e3a\u7ee7\u627f\u800c\u8bbe\u8ba1\u5e76\u63d0\u4f9b\u6587\u6863\u8bf4\u660e\u8981\u4e48\u5c31\u7981\u6b62\u7ee7\u627f\" id=\"markdown-toc-17\u8981\u4e48\u4e3a\u7ee7\u627f\u800c\u8bbe\u8ba1\u5e76\u63d0\u4f9b\u6587\u6863\u8bf4\u660e\u8981\u4e48\u5c31\u7981\u6b62\u7ee7\u627f\"><code class=\"language-plaintext highlighter-rouge\">17<\/code>.\u8981\u4e48\u4e3a\u7ee7\u627f\u800c\u8bbe\u8ba1\uff0c\u5e76\u63d0\u4f9b\u6587\u6863\u8bf4\u660e\uff0c\u8981\u4e48\u5c31\u7981\u6b62\u7ee7\u627f<\/a><\/li>\n      <li><a href=\"#18\u63a5\u53e3\u4f18\u4e8e\u62bd\u8c61\u7c7b\" id=\"markdown-toc-18\u63a5\u53e3\u4f18\u4e8e\u62bd\u8c61\u7c7b\"><code class=\"language-plaintext highlighter-rouge\">18<\/code>.\u63a5\u53e3\u4f18\u4e8e\u62bd\u8c61\u7c7b<\/a><\/li>\n      <li><a href=\"#19\u63a5\u53e3\u53ea\u7528\u4e8e\u5b9a\u4e49\u7c7b\u578b\" id=\"markdown-toc-19\u63a5\u53e3\u53ea\u7528\u4e8e\u5b9a\u4e49\u7c7b\u578b\"><code class=\"language-plaintext highlighter-rouge\">19<\/code>.\u63a5\u53e3\u53ea\u7528\u4e8e\u5b9a\u4e49\u7c7b\u578b<\/a><\/li>\n      <li><a href=\"#20\u7c7b\u5c42\u6b21\u4f18\u4e8e\u6807\u7b7e\u7c7b\" id=\"markdown-toc-20\u7c7b\u5c42\u6b21\u4f18\u4e8e\u6807\u7b7e\u7c7b\"><code class=\"language-plaintext highlighter-rouge\">20<\/code>.\u7c7b\u5c42\u6b21\u4f18\u4e8e\u6807\u7b7e\u7c7b<\/a><\/li>\n      <li><a href=\"#21\u7528\u51fd\u6570\u5bf9\u8c61\u8868\u793a\u7b56\u7565\" id=\"markdown-toc-21\u7528\u51fd\u6570\u5bf9\u8c61\u8868\u793a\u7b56\u7565\"><code class=\"language-plaintext highlighter-rouge\">21<\/code>.\u7528\u51fd\u6570\u5bf9\u8c61\u8868\u793a\u7b56\u7565<\/a><\/li>\n      <li><a href=\"#22\u4f18\u5148\u8003\u8651\u9759\u6001\u6210\u5458\u7c7b\" id=\"markdown-toc-22\u4f18\u5148\u8003\u8651\u9759\u6001\u6210\u5458\u7c7b\"><code class=\"language-plaintext highlighter-rouge\">22<\/code>.\u4f18\u5148\u8003\u8651\u9759\u6001\u6210\u5458\u7c7b<\/a><\/li>\n    <\/ul>\n  <\/li>\n  <li><a href=\"#\u56db-\u6cdb\u578b\" id=\"markdown-toc-\u56db-\u6cdb\u578b\"><code class=\"language-plaintext highlighter-rouge\">\u56db<\/code> \u6cdb\u578b<\/a>    <ul>\n      <li><a href=\"#23\u4e0d\u8981\u5728\u65b0\u4ee3\u7801\u4e2d\u4f7f\u7528\u539f\u751f\u6001\u7c7b\u578b\" id=\"markdown-toc-23\u4e0d\u8981\u5728\u65b0\u4ee3\u7801\u4e2d\u4f7f\u7528\u539f\u751f\u6001\u7c7b\u578b\"><code class=\"language-plaintext highlighter-rouge\">23<\/code>.\u4e0d\u8981\u5728\u65b0\u4ee3\u7801\u4e2d\u4f7f\u7528\u539f\u751f\u6001\u7c7b\u578b<\/a><\/li>\n      <li><a href=\"#24\u6d88\u9664\u975e\u53d7\u68c0\u8b66\u544a\" id=\"markdown-toc-24\u6d88\u9664\u975e\u53d7\u68c0\u8b66\u544a\"><code class=\"language-plaintext highlighter-rouge\">24<\/code>.\u6d88\u9664\u975e\u53d7\u68c0\u8b66\u544a<\/a><\/li>\n      <li><a href=\"#25\u5217\u8868\u4f18\u5148\u4e8e\u6570\u7ec4\" id=\"markdown-toc-25\u5217\u8868\u4f18\u5148\u4e8e\u6570\u7ec4\"><code class=\"language-plaintext highlighter-rouge\">25<\/code>.\u5217\u8868\u4f18\u5148\u4e8e\u6570\u7ec4<\/a><\/li>\n      <li><a href=\"#26\u4f18\u5148\u8003\u8651\u6cdb\u578b\" id=\"markdown-toc-26\u4f18\u5148\u8003\u8651\u6cdb\u578b\"><code class=\"language-plaintext highlighter-rouge\">26<\/code>.\u4f18\u5148\u8003\u8651\u6cdb\u578b<\/a><\/li>\n      <li><a href=\"#27\u4f18\u5148\u8003\u8651\u6cdb\u578b\u65b9\u6cd5\" id=\"markdown-toc-27\u4f18\u5148\u8003\u8651\u6cdb\u578b\u65b9\u6cd5\"><code class=\"language-plaintext highlighter-rouge\">27<\/code>.\u4f18\u5148\u8003\u8651\u6cdb\u578b\u65b9\u6cd5<\/a><\/li>\n      <li><a href=\"#28\u5229\u7528\u6709\u9650\u901a\u914d\u7b26\u6765\u63d0\u5347api\u7684\u7075\u6d3b\u6027\" id=\"markdown-toc-28\u5229\u7528\u6709\u9650\u901a\u914d\u7b26\u6765\u63d0\u5347api\u7684\u7075\u6d3b\u6027\"><code class=\"language-plaintext highlighter-rouge\">28<\/code>.\u5229\u7528\u6709\u9650\u901a\u914d\u7b26\u6765\u63d0\u5347API\u7684\u7075\u6d3b\u6027<\/a><\/li>\n      <li><a href=\"#29\u4f18\u5148\u8003\u8651\u7c7b\u578b\u5b89\u5168\u7684\u5f02\u6784\u5bb9\u5668\" id=\"markdown-toc-29\u4f18\u5148\u8003\u8651\u7c7b\u578b\u5b89\u5168\u7684\u5f02\u6784\u5bb9\u5668\"><code class=\"language-plaintext highlighter-rouge\">29<\/code>.\u4f18\u5148\u8003\u8651\u7c7b\u578b\u5b89\u5168\u7684\u5f02\u6784\u5bb9\u5668<\/a><\/li>\n    <\/ul>\n  <\/li>\n  <li><a href=\"#\u4e94-\u679a\u4e3e\u548c\u6ce8\u89e3\" id=\"markdown-toc-\u4e94-\u679a\u4e3e\u548c\u6ce8\u89e3\"><code class=\"language-plaintext highlighter-rouge\">\u4e94<\/code> \u679a\u4e3e\u548c\u6ce8\u89e3<\/a>    <ul>\n      <li><a href=\"#30\u7528enum\u4ee3\u66ffint\u5e38\u91cf\" id=\"markdown-toc-30\u7528enum\u4ee3\u66ffint\u5e38\u91cf\"><code class=\"language-plaintext highlighter-rouge\">30<\/code>.\u7528enum\u4ee3\u66ffint\u5e38\u91cf<\/a><\/li>\n      <li><a href=\"#31\u7528\u5b9e\u4f8b\u57df\u4ee3\u66ff\u5e8f\u6570\" id=\"markdown-toc-31\u7528\u5b9e\u4f8b\u57df\u4ee3\u66ff\u5e8f\u6570\"><code class=\"language-plaintext highlighter-rouge\">31<\/code>.\u7528\u5b9e\u4f8b\u57df\u4ee3\u66ff\u5e8f\u6570<\/a><\/li>\n      <li><a href=\"#32\u7528enumset\u4ee3\u66ff\u4f4d\u57df\" id=\"markdown-toc-32\u7528enumset\u4ee3\u66ff\u4f4d\u57df\"><code class=\"language-plaintext highlighter-rouge\">32<\/code>.\u7528EnumSet\u4ee3\u66ff\u4f4d\u57df<\/a><\/li>\n      <li><a href=\"#33\u7528enummap\u4ee3\u66ff\u5e8f\u6570\u7d22\u5f15\" id=\"markdown-toc-33\u7528enummap\u4ee3\u66ff\u5e8f\u6570\u7d22\u5f15\"><code class=\"language-plaintext highlighter-rouge\">33<\/code>.\u7528EnumMap\u4ee3\u66ff\u5e8f\u6570\u7d22\u5f15<\/a><\/li>\n      <li><a href=\"#34\u7528\u63a5\u53e3\u6a21\u62df\u53ef\u4f38\u7f29\u7684\u679a\u4e3e\" id=\"markdown-toc-34\u7528\u63a5\u53e3\u6a21\u62df\u53ef\u4f38\u7f29\u7684\u679a\u4e3e\"><code class=\"language-plaintext highlighter-rouge\">34<\/code>.\u7528\u63a5\u53e3\u6a21\u62df\u53ef\u4f38\u7f29\u7684\u679a\u4e3e<\/a><\/li>\n      <li><a href=\"#35\u6ce8\u89e3\u4f18\u5148\u4e8e\u547d\u540d\u6a21\u5f0f\" id=\"markdown-toc-35\u6ce8\u89e3\u4f18\u5148\u4e8e\u547d\u540d\u6a21\u5f0f\"><code class=\"language-plaintext highlighter-rouge\">35<\/code>.\u6ce8\u89e3\u4f18\u5148\u4e8e\u547d\u540d\u6a21\u5f0f<\/a><\/li>\n      <li><a href=\"#36\u575a\u6301\u4f7f\u7528override\u6ce8\u89e3\" id=\"markdown-toc-36\u575a\u6301\u4f7f\u7528override\u6ce8\u89e3\"><code class=\"language-plaintext highlighter-rouge\">36<\/code>.\u575a\u6301\u4f7f\u7528Override\u6ce8\u89e3<\/a><\/li>\n      <li><a href=\"#37\u7528\u6807\u8bb0\u63a5\u53e3\u5b9a\u4e49\u7c7b\u578b\" id=\"markdown-toc-37\u7528\u6807\u8bb0\u63a5\u53e3\u5b9a\u4e49\u7c7b\u578b\"><code class=\"language-plaintext highlighter-rouge\">37<\/code>.\u7528\u6807\u8bb0\u63a5\u53e3\u5b9a\u4e49\u7c7b\u578b<\/a><\/li>\n    <\/ul>\n  <\/li>\n  <li><a href=\"#\u516d-\u65b9\u6cd5\" id=\"markdown-toc-\u516d-\u65b9\u6cd5\"><code class=\"language-plaintext highlighter-rouge\">\u516d<\/code> \u65b9\u6cd5<\/a>    <ul>\n      <li><a href=\"#38\u68c0\u67e5\u53c2\u6570\u7684\u6709\u6548\u6027\" id=\"markdown-toc-38\u68c0\u67e5\u53c2\u6570\u7684\u6709\u6548\u6027\"><code class=\"language-plaintext highlighter-rouge\">38<\/code>.\u68c0\u67e5\u53c2\u6570\u7684\u6709\u6548\u6027<\/a><\/li>\n      <li><a href=\"#39\u5fc5\u8981\u65f6\u8fdb\u884c\u4fdd\u62a4\u6027\u62f7\u8d1d\" id=\"markdown-toc-39\u5fc5\u8981\u65f6\u8fdb\u884c\u4fdd\u62a4\u6027\u62f7\u8d1d\"><code class=\"language-plaintext highlighter-rouge\">39<\/code>.\u5fc5\u8981\u65f6\u8fdb\u884c\u4fdd\u62a4\u6027\u62f7\u8d1d<\/a><\/li>\n      <li><a href=\"#40\u8c28\u614e\u8bbe\u8ba1\u65b9\u6cd5\u7b7e\u540d\" id=\"markdown-toc-40\u8c28\u614e\u8bbe\u8ba1\u65b9\u6cd5\u7b7e\u540d\"><code class=\"language-plaintext highlighter-rouge\">40<\/code>.\u8c28\u614e\u8bbe\u8ba1\u65b9\u6cd5\u7b7e\u540d<\/a><\/li>\n      <li><a href=\"#41\u614e\u7528\u91cd\u8f7d\" id=\"markdown-toc-41\u614e\u7528\u91cd\u8f7d\"><code class=\"language-plaintext highlighter-rouge\">41<\/code>.\u614e\u7528\u91cd\u8f7d<\/a><\/li>\n      <li><a href=\"#42\u614e\u7528\u53ef\u53d8\u53c2\u6570\" id=\"markdown-toc-42\u614e\u7528\u53ef\u53d8\u53c2\u6570\"><code class=\"language-plaintext highlighter-rouge\">42<\/code>.\u614e\u7528\u53ef\u53d8\u53c2\u6570<\/a><\/li>\n      <li><a href=\"#43\u8fd4\u56de\u96f6\u957f\u5ea6\u7684\u6570\u7ec4\u6216\u8005\u96c6\u5408\u800c\u4e0d\u662fnull\" id=\"markdown-toc-43\u8fd4\u56de\u96f6\u957f\u5ea6\u7684\u6570\u7ec4\u6216\u8005\u96c6\u5408\u800c\u4e0d\u662fnull\"><code class=\"language-plaintext highlighter-rouge\">43<\/code>.\u8fd4\u56de\u96f6\u957f\u5ea6\u7684\u6570\u7ec4\u6216\u8005\u96c6\u5408\uff0c\u800c\u4e0d\u662fnull<\/a><\/li>\n      <li><a href=\"#44\u4e3a\u6240\u6709\u5bfc\u51fa\u7684api\u5143\u7d20\u7f16\u5199\u6587\u6863\u6ce8\u91ca\" id=\"markdown-toc-44\u4e3a\u6240\u6709\u5bfc\u51fa\u7684api\u5143\u7d20\u7f16\u5199\u6587\u6863\u6ce8\u91ca\"><code class=\"language-plaintext highlighter-rouge\">44<\/code>.\u4e3a\u6240\u6709\u5bfc\u51fa\u7684API\u5143\u7d20\u7f16\u5199\u6587\u6863\u6ce8\u91ca<\/a><\/li>\n    <\/ul>\n  <\/li>\n  <li><a href=\"#\u4e03-\u901a\u7528\u7a0b\u5e8f\u8bbe\u8ba1\" id=\"markdown-toc-\u4e03-\u901a\u7528\u7a0b\u5e8f\u8bbe\u8ba1\"><code class=\"language-plaintext highlighter-rouge\">\u4e03<\/code> \u901a\u7528\u7a0b\u5e8f\u8bbe\u8ba1<\/a>    <ul>\n      <li><a href=\"#45\u5c06\u5c40\u90e8\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u6700\u5c0f\u5316\" id=\"markdown-toc-45\u5c06\u5c40\u90e8\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u6700\u5c0f\u5316\"><code class=\"language-plaintext highlighter-rouge\">45<\/code>.\u5c06\u5c40\u90e8\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u6700\u5c0f\u5316<\/a><\/li>\n      <li><a href=\"#46for-each-\u5faa\u73af\u4f18\u5148\u4e8e\u4f20\u7edffor\u5faa\u73af\" id=\"markdown-toc-46for-each-\u5faa\u73af\u4f18\u5148\u4e8e\u4f20\u7edffor\u5faa\u73af\"><code class=\"language-plaintext highlighter-rouge\">46<\/code>.for-each \u5faa\u73af\u4f18\u5148\u4e8e\u4f20\u7edffor\u5faa\u73af<\/a><\/li>\n      <li><a href=\"#47\u4e86\u89e3\u548c\u4f7f\u7528\u7c7b\u5e93\" id=\"markdown-toc-47\u4e86\u89e3\u548c\u4f7f\u7528\u7c7b\u5e93\"><code class=\"language-plaintext highlighter-rouge\">47<\/code>.\u4e86\u89e3\u548c\u4f7f\u7528\u7c7b\u5e93<\/a><\/li>\n      <li><a href=\"#48\u5982\u679c\u9700\u8981\u7cbe\u786e\u7684\u7b54\u6848\u8bf7\u907f\u514d\u4f7f\u7528float\u548cdouble\" id=\"markdown-toc-48\u5982\u679c\u9700\u8981\u7cbe\u786e\u7684\u7b54\u6848\u8bf7\u907f\u514d\u4f7f\u7528float\u548cdouble\"><code class=\"language-plaintext highlighter-rouge\">48<\/code>.\u5982\u679c\u9700\u8981\u7cbe\u786e\u7684\u7b54\u6848\uff0c\u8bf7\u907f\u514d\u4f7f\u7528float\u548cdouble<\/a><\/li>\n      <li><a href=\"#49\u57fa\u672c\u7c7b\u578b\u4f18\u5148\u4e8e\u88c5\u7bb1\u57fa\u672c\u7c7b\u578b\" id=\"markdown-toc-49\u57fa\u672c\u7c7b\u578b\u4f18\u5148\u4e8e\u88c5\u7bb1\u57fa\u672c\u7c7b\u578b\"><code class=\"language-plaintext highlighter-rouge\">49<\/code>.\u57fa\u672c\u7c7b\u578b\u4f18\u5148\u4e8e\u88c5\u7bb1\u57fa\u672c\u7c7b\u578b<\/a><\/li>\n      <li><a href=\"#50\u5982\u679c\u5176\u4ed6\u7c7b\u578b\u66f4\u9002\u5408\u5219\u5c3d\u91cf\u907f\u514d\u4f7f\u7528\u5b57\u7b26\u4e32\" id=\"markdown-toc-50\u5982\u679c\u5176\u4ed6\u7c7b\u578b\u66f4\u9002\u5408\u5219\u5c3d\u91cf\u907f\u514d\u4f7f\u7528\u5b57\u7b26\u4e32\"><code class=\"language-plaintext highlighter-rouge\">50<\/code>.\u5982\u679c\u5176\u4ed6\u7c7b\u578b\u66f4\u9002\u5408\uff0c\u5219\u5c3d\u91cf\u907f\u514d\u4f7f\u7528\u5b57\u7b26\u4e32<\/a><\/li>\n      <li><a href=\"#51\u5f53\u5fc3\u5b57\u7b26\u4e32\u8fde\u63a5\u7684\u6027\u80fd\" id=\"markdown-toc-51\u5f53\u5fc3\u5b57\u7b26\u4e32\u8fde\u63a5\u7684\u6027\u80fd\"><code class=\"language-plaintext highlighter-rouge\">51<\/code>.\u5f53\u5fc3\u5b57\u7b26\u4e32\u8fde\u63a5\u7684\u6027\u80fd<\/a><\/li>\n      <li><a href=\"#52\u901a\u8fc7\u63a5\u53e3\u5f15\u7528\u5bf9\u8c61\" id=\"markdown-toc-52\u901a\u8fc7\u63a5\u53e3\u5f15\u7528\u5bf9\u8c61\"><code class=\"language-plaintext highlighter-rouge\">52<\/code>.\u901a\u8fc7\u63a5\u53e3\u5f15\u7528\u5bf9\u8c61<\/a><\/li>\n      <li><a href=\"#53\u63a5\u53e3\u4f18\u5148\u4e8e\u53cd\u5c04\u673a\u5236\" id=\"markdown-toc-53\u63a5\u53e3\u4f18\u5148\u4e8e\u53cd\u5c04\u673a\u5236\"><code class=\"language-plaintext highlighter-rouge\">53<\/code>.\u63a5\u53e3\u4f18\u5148\u4e8e\u53cd\u5c04\u673a\u5236<\/a><\/li>\n      <li><a href=\"#54\u8c28\u614e\u5730\u4f7f\u7528\u672c\u5730\u65b9\u6cd5\" id=\"markdown-toc-54\u8c28\u614e\u5730\u4f7f\u7528\u672c\u5730\u65b9\u6cd5\"><code class=\"language-plaintext highlighter-rouge\">54<\/code>.\u8c28\u614e\u5730\u4f7f\u7528\u672c\u5730\u65b9\u6cd5<\/a><\/li>\n      <li><a href=\"#55\u8c28\u614e\u5730\u8fdb\u884c\u4f18\u5316\" id=\"markdown-toc-55\u8c28\u614e\u5730\u8fdb\u884c\u4f18\u5316\"><code class=\"language-plaintext highlighter-rouge\">55<\/code>.\u8c28\u614e\u5730\u8fdb\u884c\u4f18\u5316<\/a><\/li>\n      <li><a href=\"#56\u9075\u5b88\u666e\u904d\u63a5\u53d7\u7684\u547d\u540d\u4e60\u60ef\" id=\"markdown-toc-56\u9075\u5b88\u666e\u904d\u63a5\u53d7\u7684\u547d\u540d\u4e60\u60ef\"><code class=\"language-plaintext highlighter-rouge\">56<\/code>.\u9075\u5b88\u666e\u904d\u63a5\u53d7\u7684\u547d\u540d\u4e60\u60ef<\/a><\/li>\n    <\/ul>\n  <\/li>\n  <li><a href=\"#\u516b-\u5f02\u5e38\" id=\"markdown-toc-\u516b-\u5f02\u5e38\"><code class=\"language-plaintext highlighter-rouge\">\u516b<\/code> \u5f02\u5e38<\/a>    <ul>\n      <li><a href=\"#57\u53ea\u9488\u5bf9\u4e0d\u6b63\u5e38\u60c5\u51b5\u4f7f\u7528\u5f02\u5e38\" id=\"markdown-toc-57\u53ea\u9488\u5bf9\u4e0d\u6b63\u5e38\u60c5\u51b5\u4f7f\u7528\u5f02\u5e38\"><code class=\"language-plaintext highlighter-rouge\">57<\/code>.\u53ea\u9488\u5bf9\u4e0d\u6b63\u5e38\u60c5\u51b5\u4f7f\u7528\u5f02\u5e38<\/a><\/li>\n      <li><a href=\"#58\u5bf9\u53ef\u6062\u590d\u7684\u60c5\u51b5\u4f7f\u7528\u53d7\u68c0\u5f02\u5e38\u5bf9\u7f16\u7a0b\u9519\u8bef\u4f7f\u7528\u8fd0\u884c\u65f6\u5f02\u5e38\" id=\"markdown-toc-58\u5bf9\u53ef\u6062\u590d\u7684\u60c5\u51b5\u4f7f\u7528\u53d7\u68c0\u5f02\u5e38\u5bf9\u7f16\u7a0b\u9519\u8bef\u4f7f\u7528\u8fd0\u884c\u65f6\u5f02\u5e38\"><code class=\"language-plaintext highlighter-rouge\">58<\/code>.\u5bf9\u53ef\u6062\u590d\u7684\u60c5\u51b5\u4f7f\u7528\u53d7\u68c0\u5f02\u5e38\uff0c\u5bf9\u7f16\u7a0b\u9519\u8bef\u4f7f\u7528\u8fd0\u884c\u65f6\u5f02\u5e38<\/a><\/li>\n      <li><a href=\"#59\u907f\u514d\u4e0d\u5fc5\u8981\u5730\u4f7f\u7528\u53d7\u68c0\u7684\u5f02\u5e38\" id=\"markdown-toc-59\u907f\u514d\u4e0d\u5fc5\u8981\u5730\u4f7f\u7528\u53d7\u68c0\u7684\u5f02\u5e38\"><code class=\"language-plaintext highlighter-rouge\">59<\/code>.\u907f\u514d\u4e0d\u5fc5\u8981\u5730\u4f7f\u7528\u53d7\u68c0\u7684\u5f02\u5e38<\/a><\/li>\n      <li><a href=\"#60\u4f18\u5148\u4f7f\u7528\u6807\u51c6\u7684\u5f02\u5e38\" id=\"markdown-toc-60\u4f18\u5148\u4f7f\u7528\u6807\u51c6\u7684\u5f02\u5e38\"><code class=\"language-plaintext highlighter-rouge\">60<\/code>.\u4f18\u5148\u4f7f\u7528\u6807\u51c6\u7684\u5f02\u5e38<\/a><\/li>\n      <li><a href=\"#61\u629b\u51fa\u4e0e\u62bd\u8c61\u76f8\u5bf9\u5e94\u7684\u5f02\u5e38\" id=\"markdown-toc-61\u629b\u51fa\u4e0e\u62bd\u8c61\u76f8\u5bf9\u5e94\u7684\u5f02\u5e38\"><code class=\"language-plaintext highlighter-rouge\">61<\/code>.\u629b\u51fa\u4e0e\u62bd\u8c61\u76f8\u5bf9\u5e94\u7684\u5f02\u5e38<\/a><\/li>\n      <li><a href=\"#62\u6bcf\u4e2a\u65b9\u6cd5\u629b\u51fa\u7684\u5f02\u5e38\u90fd\u8981\u6709\u6587\u6863\" id=\"markdown-toc-62\u6bcf\u4e2a\u65b9\u6cd5\u629b\u51fa\u7684\u5f02\u5e38\u90fd\u8981\u6709\u6587\u6863\"><code class=\"language-plaintext highlighter-rouge\">62<\/code>.\u6bcf\u4e2a\u65b9\u6cd5\u629b\u51fa\u7684\u5f02\u5e38\u90fd\u8981\u6709\u6587\u6863<\/a><\/li>\n      <li><a href=\"#63\u5728\u7ec6\u8282\u6d88\u606f\u4e2d\u5305\u542b\u80fd\u6355\u6349\u5931\u8d25\u7684\u4fe1\u606f\" id=\"markdown-toc-63\u5728\u7ec6\u8282\u6d88\u606f\u4e2d\u5305\u542b\u80fd\u6355\u6349\u5931\u8d25\u7684\u4fe1\u606f\"><code class=\"language-plaintext highlighter-rouge\">63<\/code>.\u5728\u7ec6\u8282\u6d88\u606f\u4e2d\u5305\u542b\u80fd\u6355\u6349\u5931\u8d25\u7684\u4fe1\u606f<\/a><\/li>\n      <li><a href=\"#64\u52aa\u529b\u4f7f\u5931\u8d25\u4fdd\u6301\u539f\u5b50\u6027\" id=\"markdown-toc-64\u52aa\u529b\u4f7f\u5931\u8d25\u4fdd\u6301\u539f\u5b50\u6027\"><code class=\"language-plaintext highlighter-rouge\">64<\/code>.\u52aa\u529b\u4f7f\u5931\u8d25\u4fdd\u6301\u539f\u5b50\u6027<\/a><\/li>\n      <li><a href=\"#65\u4e0d\u8981\u5ffd\u7565\u5f02\u5e38\" id=\"markdown-toc-65\u4e0d\u8981\u5ffd\u7565\u5f02\u5e38\"><code class=\"language-plaintext highlighter-rouge\">65<\/code>.\u4e0d\u8981\u5ffd\u7565\u5f02\u5e38<\/a><\/li>\n      <li><a href=\"#\u4e5d-\u5e76\u53d1\" id=\"markdown-toc-\u4e5d-\u5e76\u53d1\"><code class=\"language-plaintext highlighter-rouge\">\u4e5d<\/code> \u5e76\u53d1<\/a><\/li>\n      <li><a href=\"#66\u540c\u6b65\u8bbf\u95ee\u5171\u4eab\u7684\u53ef\u53d8\u6570\u636e\" id=\"markdown-toc-66\u540c\u6b65\u8bbf\u95ee\u5171\u4eab\u7684\u53ef\u53d8\u6570\u636e\"><code class=\"language-plaintext highlighter-rouge\">66<\/code>.\u540c\u6b65\u8bbf\u95ee\u5171\u4eab\u7684\u53ef\u53d8\u6570\u636e<\/a><\/li>\n      <li><a href=\"#67\u907f\u514d\u8fc7\u5ea6\u540c\u6b65\" id=\"markdown-toc-67\u907f\u514d\u8fc7\u5ea6\u540c\u6b65\"><code class=\"language-plaintext highlighter-rouge\">67<\/code>.\u907f\u514d\u8fc7\u5ea6\u540c\u6b65<\/a><\/li>\n      <li><a href=\"#68executor\u548ctask\u4f18\u5148\u4e8e\u7ebf\u7a0b\" id=\"markdown-toc-68executor\u548ctask\u4f18\u5148\u4e8e\u7ebf\u7a0b\"><code class=\"language-plaintext highlighter-rouge\">68<\/code>.executor\u548ctask\u4f18\u5148\u4e8e\u7ebf\u7a0b<\/a><\/li>\n      <li><a href=\"#69\u5e76\u53d1\u5de5\u5177\u4f18\u5148\u4e8ewait\u548cnotify\" id=\"markdown-toc-69\u5e76\u53d1\u5de5\u5177\u4f18\u5148\u4e8ewait\u548cnotify\"><code class=\"language-plaintext highlighter-rouge\">69<\/code>.\u5e76\u53d1\u5de5\u5177\u4f18\u5148\u4e8ewait\u548cnotify<\/a><\/li>\n      <li><a href=\"#70\u7ebf\u7a0b\u5b89\u5168\u6027\u7684\u6587\u6863\u5316\" id=\"markdown-toc-70\u7ebf\u7a0b\u5b89\u5168\u6027\u7684\u6587\u6863\u5316\"><code class=\"language-plaintext highlighter-rouge\">70<\/code>.\u7ebf\u7a0b\u5b89\u5168\u6027\u7684\u6587\u6863\u5316<\/a><\/li>\n      <li><a href=\"#71\u614e\u7528\u5ef6\u8fdf\u521d\u59cb\u5316\" id=\"markdown-toc-71\u614e\u7528\u5ef6\u8fdf\u521d\u59cb\u5316\"><code class=\"language-plaintext highlighter-rouge\">71<\/code>.\u614e\u7528\u5ef6\u8fdf\u521d\u59cb\u5316<\/a><\/li>\n      <li><a href=\"#72\u4e0d\u8981\u4f9d\u8d56\u4e8e\u7ebf\u7a0b\u8c03\u5ea6\u5668\" id=\"markdown-toc-72\u4e0d\u8981\u4f9d\u8d56\u4e8e\u7ebf\u7a0b\u8c03\u5ea6\u5668\"><code class=\"language-plaintext highlighter-rouge\">72<\/code>.\u4e0d\u8981\u4f9d\u8d56\u4e8e\u7ebf\u7a0b\u8c03\u5ea6\u5668<\/a><\/li>\n      <li><a href=\"#73\u907f\u514d\u4f7f\u7528\u7ebf\u7a0b\u7ec4\" id=\"markdown-toc-73\u907f\u514d\u4f7f\u7528\u7ebf\u7a0b\u7ec4\"><code class=\"language-plaintext highlighter-rouge\">73<\/code>.\u907f\u514d\u4f7f\u7528\u7ebf\u7a0b\u7ec4<\/a><\/li>\n    <\/ul>\n  <\/li>\n  <li><a href=\"#\u5341-\u5e8f\u5217\u5316\" id=\"markdown-toc-\u5341-\u5e8f\u5217\u5316\"><code class=\"language-plaintext highlighter-rouge\">\u5341<\/code> \u5e8f\u5217\u5316<\/a>    <ul>\n      <li><a href=\"#74\u8c28\u614e\u5730\u5b9e\u73b0serializable\u63a5\u53e3\" id=\"markdown-toc-74\u8c28\u614e\u5730\u5b9e\u73b0serializable\u63a5\u53e3\"><code class=\"language-plaintext highlighter-rouge\">74<\/code>.\u8c28\u614e\u5730\u5b9e\u73b0Serializable\u63a5\u53e3<\/a><\/li>\n      <li><a href=\"#75\u8003\u8651\u4f7f\u7528\u81ea\u5b9a\u4e49\u7684\u5e8f\u5217\u5316\u5f62\u5f0f\" id=\"markdown-toc-75\u8003\u8651\u4f7f\u7528\u81ea\u5b9a\u4e49\u7684\u5e8f\u5217\u5316\u5f62\u5f0f\"><code class=\"language-plaintext highlighter-rouge\">75<\/code>.\u8003\u8651\u4f7f\u7528\u81ea\u5b9a\u4e49\u7684\u5e8f\u5217\u5316\u5f62\u5f0f<\/a><\/li>\n      <li><a href=\"#76\u4fdd\u62a4\u6027\u5730\u7f16\u5199readobject\u65b9\u6cd5\" id=\"markdown-toc-76\u4fdd\u62a4\u6027\u5730\u7f16\u5199readobject\u65b9\u6cd5\"><code class=\"language-plaintext highlighter-rouge\">76<\/code>.\u4fdd\u62a4\u6027\u5730\u7f16\u5199readObject\u65b9\u6cd5<\/a><\/li>\n      <li><a href=\"#77\u5bf9\u4e8e\u5b9e\u4f8b\u7684\u63a7\u5236\u679a\u4e3e\u7c7b\u578b\u4f18\u5148\u4e8ereadresolve\" id=\"markdown-toc-77\u5bf9\u4e8e\u5b9e\u4f8b\u7684\u63a7\u5236\u679a\u4e3e\u7c7b\u578b\u4f18\u5148\u4e8ereadresolve\"><code class=\"language-plaintext highlighter-rouge\">77<\/code>.\u5bf9\u4e8e\u5b9e\u4f8b\u7684\u63a7\u5236\uff0c\u679a\u4e3e\u7c7b\u578b\u4f18\u5148\u4e8ereadResolve<\/a><\/li>\n      <li><a href=\"#78\u8003\u8651\u7528\u5e8f\u5217\u5316\u4ee3\u7406\u4ee3\u66ff\u5e8f\u5217\u5316\u5b9e\u4f8b\" id=\"markdown-toc-78\u8003\u8651\u7528\u5e8f\u5217\u5316\u4ee3\u7406\u4ee3\u66ff\u5e8f\u5217\u5316\u5b9e\u4f8b\"><code class=\"language-plaintext highlighter-rouge\">78<\/code>.\u8003\u8651\u7528\u5e8f\u5217\u5316\u4ee3\u7406\u4ee3\u66ff\u5e8f\u5217\u5316\u5b9e\u4f8b<\/a><\/li>\n    <\/ul>\n  <\/li>\n<\/ul>\n\n<h1 id=\"\u4e00-\u521b\u5efa\u548c\u9500\u6bc1\u5bf9\u8c61\"><code class=\"language-plaintext highlighter-rouge\">\u4e00<\/code> \u521b\u5efa\u548c\u9500\u6bc1\u5bf9\u8c61<\/h1>\n\n<h2 id=\"1\u8003\u8651\u7528\u9759\u6001\u5de5\u5382\u65b9\u6cd5\u4ee3\u66ff\u6784\u9020\u5668\"><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u8003\u8651\u7528\u9759\u6001\u5de5\u5382\u65b9\u6cd5\u4ee3\u66ff\u6784\u9020\u5668<\/h2>\n\n<p>\u9759\u6001\u5de5\u5382\u65b9\u6cd5\u7684\u4f18\u52bf\uff1a<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u6709\u540d\u79f0\uff0c\u53ef\u4ee5\u89c1\u540d\u77e5\u4e49\u4e86\u89e3\u83b7\u53d6\u5bf9\u8c61\u7684\u7279\u70b9<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u4e0d\u5fc5\u6bcf\u6b21\u8c03\u7528\u65f6\u90fd\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u53ef\u4ee5\u8fd4\u56de\u539f\u7c7b\u578b\u7684\u4efb\u4f55\u5b50\u7c7b\u578b\u5bf9\u8c61<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u521b\u5efa\u53c2\u6570\u5316\u7c7b\u578b\u5b9e\u4f8b\u65f6\uff0c\u53ef\u4ee5\u4f7f\u4ee3\u7801\u66f4\u7b80\u6d01(\u53f3\u8fb9\u65e0\u9700\u518d\u5199\u4e00\u904d)<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u4e0d\u53ef\u53d8\u5bf9\u8c61\u53ef\u4ee5\u8fdb\u884c\u7f13\u5b58\uff0c\u4ee5\u63d0\u5347\u6027\u80fd<\/p>\n\n<h2 id=\"2\u9047\u5230\u591a\u4e2a\u6784\u9020\u5668\u53c2\u6570\u65f6\u8981\u8003\u8651\u7528\u6784\u5efa\u5668\"><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u9047\u5230\u591a\u4e2a\u6784\u9020\u5668\u53c2\u6570\u65f6\u8981\u8003\u8651\u7528\u6784\u5efa\u5668<\/h2>\n\n<p>\u6784\u5efa\u5668\u4f18\u52bf\uff1a<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u91cd\u53e0\u6784\u9020\u5668\u4ee3\u7801\u5197\u4f59<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.<code class=\"language-plaintext highlighter-rouge\">JavaBean<\/code>\u6a21\u5f0f\u963b\u6b62\u4e86\u5c06\u7c7b\u505a\u6210\u4e0d\u53ef\u53d8\u7684\u53ef\u80fd<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.<code class=\"language-plaintext highlighter-rouge\">builder<\/code>\u53ef\u4ee5\u8fdb\u884c\u53c2\u6570\u68c0\u67e5<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u65e0\u8bba\u521b\u5efa\u591a\u5c11\u4e2a\u5bf9\u8c61\uff0cbuilder\u53ea\u9700\u8981\u4e00\u4e2a\uff0c\u4e14\u53ef\u4ee5\u5728\u521b\u5efa\u4e0d\u540c\u5bf9\u8c61\u65f6\u8fdb\u884c\u8c03\u6574\uff0c\u6216\u8005\u81ea\u52a8\u586b\u5145\u67d0\u4e9b\u57df \u3002<\/p>\n\n<p>\u4e0d\u8db3\uff1a\u521b\u5efa\u5bf9\u8c61\u524d\u9700\u8981\u5148\u521b\u5efabuilder<\/p>\n\n<h2 id=\"3\u7528\u79c1\u6709\u6784\u9020\u5668\u6216\u8005\u679a\u4e3e\u7c7b\u578b\u5f3a\u5316singleton\u5c5e\u6027\"><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u7528\u79c1\u6709\u6784\u9020\u5668\u6216\u8005\u679a\u4e3e\u7c7b\u578b\u5f3a\u5316Singleton\u5c5e\u6027<\/h2>\n\n<p>\u4e0d\u4f7f\u7528\u679a\u4e3e\u65f6\uff1a<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u6784\u9020\u5668\u79c1\u6709<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u6784\u9020\u5668\u629b\u51fa\u5f02\u5e38 <code class=\"language-plaintext highlighter-rouge\">if(INSTANCE!=null) throw<\/code><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5e8f\u5217\u5316\u65f6\u5fc5\u987b\u58f0\u660e\u6240\u6709\u5b9e\u4f8b\u57df\u90fd\u662f\u77ac\u65f6\uff08<code class=\"language-plaintext highlighter-rouge\">transient<\/code>\uff09\u7684\uff0c\u5e76\u63d0\u4f9b\u4e00\u4e2a<code class=\"language-plaintext highlighter-rouge\">readResolve<\/code>\u65b9\u6cd5\u8fd4\u56de\u73b0\u6709\u7684\u5355\u4f8b<\/p>\n\n<h2 id=\"4\u901a\u8fc7\u79c1\u6709\u6784\u9020\u5668\u5f3a\u5316\u4e0d\u53ef\u5b9e\u4f8b\u5316\u7684\u80fd\u529b\"><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u901a\u8fc7\u79c1\u6709\u6784\u9020\u5668\u5f3a\u5316\u4e0d\u53ef\u5b9e\u4f8b\u5316\u7684\u80fd\u529b<\/h2>\n\n<p>\u5e76\u5728\u6784\u9020\u5668\u4e2d\u629b\u51fa\u5f02\u5e38<\/p>\n\n<h2 id=\"5\u907f\u514d\u521b\u5efa\u4e0d\u5fc5\u8981\u7684\u5bf9\u8c61\"><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u907f\u514d\u521b\u5efa\u4e0d\u5fc5\u8981\u7684\u5bf9\u8c61<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5982\u679c\u5bf9\u8c61\u662f\u4e0d\u53ef\u53d8\u7684,\u5c06\u59cb\u7ec8\u53ef\u4ee5\u91cd\u7528<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5bf9\u4e8e\u7ed9\u5b9a\u5bf9\u8c61\u7684\u9002\u914d\u5668,\u4e0d\u9700\u8981\u521b\u5efa\u591a\u4e2a\u5b9e\u4f8b,\u4f8b\u5982:\u5bf9\u4e8e\u540c\u4e00Map\u5bf9\u8c61\u7684keySet\u65b9\u6cd5,\u6bcf\u6b21\u8fd4\u56de\u7684\u90fd\u662f\u540c\u4e00\u4e2a\u5bf9\u8c61<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u4f18\u5148\u4f7f\u7528\u57fa\u672c\u7c7b\u578b,\u800c\u4e0d\u662f\u88c5\u7bb1\u7c7b\u578b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u901a\u8fc7\u7ef4\u62a4\u5bf9\u8c61\u6c60\u6765\u907f\u514d\u521b\u5efa\u5bf9\u8c61\u5e76\u4e0d\u662f\u597d\u4e3b\u610f,\u9664\u975e\u5bf9\u8c61\u975e\u5e38\u6602\u8d35(\u6570\u636e\u5e93\u8fde\u63a5\u6c60).<\/p>\n\n<h2 id=\"6\u6d88\u9664\u8fc7\u671f\u7684\u5bf9\u8c61\u5f15\u7528\"><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u6d88\u9664\u8fc7\u671f\u7684\u5bf9\u8c61\u5f15\u7528<\/h2>\n\n<p>\u5185\u5b58\u6cc4\u9732\u5e38\u89c1\u6765\u6e90\uff1a<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u65e0\u610f\u8bc6\u7684\u5bf9\u8c61\u4fdd\u6301(\u53ea\u8981\u662f\u7c7b\u81ea\u5df1\u7ba1\u7406\u5185\u5b58\uff0c\u7a0b\u5e8f\u5458\u5c31\u5e94\u8be5\u8b66\u60d5\u5185\u5b58\u6cc4\u9732\u95ee\u9898)<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u88ab\u9057\u5fd8\u5728\u7f13\u5b58\u4e2d\u7684\u5bf9\u8c61\u5f15\u7528(\u8003\u8651\u7528<code class=\"language-plaintext highlighter-rouge\">WeakHashMap<\/code>\u5b9e\u73b0\u7f13\u5b58)<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u76d1\u542c\u5668\u548c\u5176\u4ed6\u56de\u8c03\u6ca1\u6709\u663e\u5f0f\u5730\u53d6\u6d88\u6ce8\u518c<\/p>\n\n<p>4\u79cd\u5f15\u7528\uff1a<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.<strong>\u5f3a\u5f15\u7528<\/strong> <code class=\"language-plaintext highlighter-rouge\">Object obj = new Object();<\/code>\uff1a \u53ea\u8981\u5f3a\u5f15\u7528\u8fd8\u5b58\u5728\uff0cGC\u6c38\u8fdc\u4e0d\u4f1a\u56de\u6536<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.<strong>\u8f6f\u5f15\u7528<\/strong> <code class=\"language-plaintext highlighter-rouge\">SoftReference<\/code>\uff1a\u7528\u6765\u63cf\u8ff0\u4e00\u4e9b\u6709\u7528\u4f46\u4e0d\u5fc5\u9700\u7684\u5bf9\u8c61\uff0c\u5728\u7cfb\u7edf\u5c06\u8981\u53d1\u751f\u5185\u5b58\u6ea2\u51fa\u4e4b\u524d\uff0cGC\u4f1a\u5bf9\u8f6f\u5f15\u7528\u5bf9\u8c61\u8fdb\u884c\u56de\u6536\uff0c\u82e5\u56de\u6536\u540e\u4ecd\u6ca1\u6709\u8db3\u591f\u5185\u5b58\uff0c\u624d\u4f1a\u629b\u51fa\u5f02\u5e38\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.<strong>\u5f31\u5f15\u7528<\/strong> <code class=\"language-plaintext highlighter-rouge\">WeakReference<\/code>\uff1a\u4e5f\u662f\u7528\u6765\u63cf\u8ff0\u975e\u5fc5\u9700\u5bf9\u8c61\u7684\uff0c\u4f46\u662f\u5f3a\u5ea6\u6bd4\u8f6f\u5f15\u7528\u66f4\u5f31\uff0c\u5f31\u5f15\u7528\u5bf9\u8c61\u53ea\u80fd\u751f\u5b58\u5230\u4e0b\u4e00\u6b21GC\u53d1\u751f\u4e4b\u524d\uff0c\u5f53GC\u5de5\u4f5c\u65f6\uff0c\u65e0\u8bba\u5185\u5b58\u662f\u5426\u8db3\u591f\uff0c\u90fd\u4f1a\u56de\u6536\u5f31\u5f15\u7528\u5bf9\u8c61<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.<strong>\u865a\u5f15\u7528<\/strong> <code class=\"language-plaintext highlighter-rouge\">PhantomReference<\/code>\uff1a\u4e5f\u79f0\u4e3a\u5e7d\u7075\u5f15\u7528\u6216\u5e7b\u5f71\u5f15\u7528\uff0c\u662f\u6700\u5f31\u7684\u4e00\u79cd\u5f15\u7528\u5173\u7cfb\u3002\u4e00\u4e2a\u5bf9\u8c61\u662f\u5426\u6709\u865a\u5f15\u7528\u5b58\u5728\uff0c\u5b8c\u5168\u4e0d\u4f1a\u5bf9\u5176\u751f\u5b58\u65f6\u95f4\u6784\u6210\u5f71\u54cd\uff0c\u4e5f\u65e0\u6cd5\u901a\u8fc7\u865a\u5f15\u7528\u6765\u83b7\u5f97\u4e00\u4e2a\u5b9e\u4f8b\u3002 \u4e3a\u5bf9\u8c61\u8bbe\u7f6e\u4e00\u4e2a\u865a\u5f15\u7528\u7684\u552f\u4e00\u76ee\u7684\u5c31\u662f\u80fd\u5728\u8fd9\u4e2a\u5bf9\u8c61\u88abGC\u56de\u6536\u65f6\u6536\u5230\u4e00\u4e2a\u7cfb\u7edf\u901a\u77e5\u3002<\/p>\n\n<h2 id=\"7\u907f\u514d\u4f7f\u7528\u7ec8\u7ed3\u65b9\u6cd5\"><code class=\"language-plaintext highlighter-rouge\">7<\/code>.\u907f\u514d\u4f7f\u7528\u7ec8\u7ed3\u65b9\u6cd5<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u7ec8\u7ed3\u65b9\u6cd5\u4e0d\u80fd\u4fdd\u8bc1\u4f1a\u88ab\u53ca\u65f6\u6267\u884c\uff0c\u4e5f\u4e0d\u80fd\u4fdd\u8bc1\u4f1a\u88ab\u6267\u884c\uff0c\u6240\u4ee5\u4e0d\u5e94\u8be5\u4f9d\u8d56\u7ec8\u7ed3\u65b9\u6cd5\u6765\u66f4\u65b0\u91cd\u8981\u7684\u6301\u4e45\u72b6\u6001<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u7ec8\u7ed3\u65b9\u6cd5\u4e2d\u53d1\u751f\u7684\u5f02\u5e38\u4e0d\u4f1a\u4f7f\u7ebf\u7a0b\u7ec8\u6b62\uff0c\u4e5f\u4e0d\u4f1a\u6253\u5370\u6808\u8f68\u8ff9\uff0c\u5bf9\u8c61\u5c06\u5904\u4e8e\u7834\u574f\u72b6\u6001<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u7ec8\u7ed3\u65b9\u6cd5\u6709\u975e\u5e38\u4e25\u91cd\u7684\u6027\u80fd\u635f\u5931<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5982\u679c\u9700\u8981\u7ec8\u6b62\u8d44\u6e90\uff0c\u5e94\u8be5\u663e\u5f0f\u5730\u63d0\u4f9b\u7ec8\u6b62\u65b9\u6cd5(io\u4e2d\u7684close\u65b9\u6cd5)\uff0c\u901a\u5e38\u4e0etry-finally\u7ed3\u5408\u4f7f\u7528\uff0c\u4ee5\u786e\u4fdd\u53ca\u65f6\u7ec8\u6b62<\/p>\n\n<p>\u6ce8\u610f\uff1a<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u9664\u975e\u4f5c\u4e3a\u5b89\u5168\u7f51\u6216\u8005\u7ec8\u6b62\u975e\u5173\u952e\u8d44\u6e90\uff0c\u5426\u5219\u4e0d\u8981\u4f7f\u7528\u7ec8\u7ed3\u65b9\u6cd5\uff0c\u6700\u597d\u5c31\u5f53\u6ca1\u8fd9\u4e2a\u65b9\u6cd5<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5982\u679c\u4f7f\u7528\u4e86\u7ec8\u7ed3\u65b9\u6cd5\uff0c\u8981\u8bb0\u4f4f<code class=\"language-plaintext highlighter-rouge\">super.finalize<\/code><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5982\u679c\u7ec8\u7ed3\u65b9\u6cd5\u4f5c\u4e3a\u5b89\u5168\u7f51\uff0c\u8981\u8bb0\u5f55\u7ec8\u7ed3\u65b9\u6cd5\u7684\u975e\u6cd5\u7528\u6cd5<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5982\u679c\u7ec8\u7ed3\u65b9\u6cd5\u6240\u5c5e\u7684\u7c7b\u4e0d\u662ffinal\u7684\uff0c\u8bf7\u8003\u8651\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">\u7ec8\u7ed3\u65b9\u6cd5\u5b88\u536b\u8005<\/code><\/p>\n\n<hr \/>\n\n<h1 id=\"\u4e8c-\u901a\u7528\u65b9\u6cd5\"><code class=\"language-plaintext highlighter-rouge\">\u4e8c<\/code> \u901a\u7528\u65b9\u6cd5<\/h1>\n\n<h2 id=\"8\u8986\u76d6equals\u65f6\u8bf7\u9075\u5b88\u901a\u7528\u7ea6\u5b9a\"><code class=\"language-plaintext highlighter-rouge\">8<\/code>.\u8986\u76d6equals\u65f6\u8bf7\u9075\u5b88\u901a\u7528\u7ea6\u5b9a<\/h2>\n\n<p>\u5fc5\u987b\u9075\u5b88<code class=\"language-plaintext highlighter-rouge\">\u81ea\u53cd\u6027<\/code>\u3001<code class=\"language-plaintext highlighter-rouge\">\u5bf9\u79f0\u6027<\/code>\u3001<code class=\"language-plaintext highlighter-rouge\">\u4f20\u9012\u6027<\/code>\u3001<code class=\"language-plaintext highlighter-rouge\">\u4e00\u81f4\u6027<\/code>\u3001<code class=\"language-plaintext highlighter-rouge\">\u975e\u7a7a\u6027<\/code><\/p>\n\n<p>\u53ef\u4ee5\u7528<code class=\"language-plaintext highlighter-rouge\">&amp;&amp;<\/code>\u8fde\u63a5\u6240\u6709\u5bf9field\u7684\u6bd4\u8f83\u7ed3\u679c\u4f7f\u4ee3\u7801\u7b80\u6d01<\/p>\n\n<p>\u8bc0\u7a8d:<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5148\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">==<\/code> \u64cd\u4f5c\u7b26\u6bd4\u8f83\u4ee5\u4f18\u5316\u6027\u80fd<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">instanceof<\/code>\u68c0\u67e5\u7c7b\u578b\u662f\u5426\u6b63\u786e\u53ef\u4ee5\u540c\u65f6\u641e\u5b9anull\u5224\u65ad<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u53ea\u6bd4\u8f83\u5173\u952e\u57df,\u53ef\u4ee5\u901a\u8fc7\u5173\u952e\u57df\u8ba1\u7b97\u51fa\u6765\u7684\u5197\u4f59\u57df\u4e0d\u9700\u8981\u6bd4\u8f83<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u4f18\u5148\u6bd4\u8f83\u6700\u53ef\u80fd\u4e0d\u540c\u3001\u5f00\u9500\u6700\u4f4e\u7684\u57df<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u5bf9<code class=\"language-plaintext highlighter-rouge\">float<\/code>,<code class=\"language-plaintext highlighter-rouge\">double<\/code>\u7528<code class=\"language-plaintext highlighter-rouge\">compare<\/code>\u7279\u6b8a\u5904\u7406\uff0c\u5bf9<code class=\"language-plaintext highlighter-rouge\">\u6570\u7ec4<\/code>\u7528<code class=\"language-plaintext highlighter-rouge\">Arrays.equals<\/code>\u5904\u7406<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u8986\u76d6equals\u65f6\u603b\u8981\u8986\u76d6hashCode<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">7<\/code>.\u4e0d\u8981\u4f01\u56fe\u8ba9equals\u592a\u667a\u80fd\uff0c\u4e0d\u9700\u8981\u8003\u8651\u53c2\u6570\u53ef\u80fd\u5b58\u5728\u7684\u7b49\u4ef7\u5173\u7cfb<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">8<\/code>.\u4e0d\u8981\u4fee\u6539equals\u65b9\u6cd5\u7684\u53c2\u6570\u7c7b\u578b(\u4fee\u6539\u4e86\u5c31\u4e0d\u662f\u8986\u76d6\u4e86),@Override\u53ef\u4ee5\u907f\u514d\u8fd9\u4e00\u70b9<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">9<\/code>.<strong>\u91cc\u6c0f\u66ff\u6362\u539f\u5219<\/strong><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">10<\/code>.\u4f18\u5148\u7528<strong>\u7ec4\u5408+\u516c\u6709\u89c6\u56fe<\/strong>\u7684\u65b9\u5f0f\u6269\u5c55\u503c\u7ec4\u4ef6\uff0c\u800c\u4e0d\u662f\u7528\u7ee7\u627f<\/p>\n\n<h2 id=\"9\u8986\u76d6equals\u65f6\u603b\u8981\u8986\u76d6hashcode\"><code class=\"language-plaintext highlighter-rouge\">9<\/code>.\u8986\u76d6equals\u65f6\u603b\u8981\u8986\u76d6hashCode<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u76f8\u540c\u7684\u5bf9\u8c61\u5fc5\u987b\u5177\u6709\u76f8\u540c\u7684hashCode(\u5728hash\u8868\u4e2d,hashCode\u7528\u6765\u5b9a\u4f4dhash bucket,\u5982\u679c\u76f8\u7b49\u7684\u5bf9\u8c61\u6709\u4e0d\u540c\u7684hashCode,\u90a3\u4e48hash\u8868\u5c06\u4ece\u9519\u8bef\u7684hash bucket\u4e2d\u5bfb\u627e\u5bf9\u8c61,\u6700\u540e\u4f1a\u5224\u5b9a\u4e3a\u4e0d\u5b58\u5728)<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u7528<code class=\"language-plaintext highlighter-rouge\">result = 31 * result + c<\/code>\u7684\u65b9\u5f0f\u83b7\u53d6hashCode\uff0cresult\u521d\u503c\u8bbe\u4e3a17\uff0cc\u4e3a\u6bcf\u4e2a\u57df\u7684\u6563\u5217\u503c<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u80fd\u591f\u901a\u8fc7\u5173\u952e\u57df\u8ba1\u7b97\u51fa\u6765\u7684<strong>\u5197\u4f59\u57df<\/strong>\u53ef\u4ee5\u6392\u9664<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5982\u679c\u8ba1\u7b97hashCode\u5f00\u9500\u5f88\u5927\uff0c\u53ef\u4ee5\u5bf9hashCode\u8fdb\u884c\u7f13\u5b58\uff0c\u5e76\u5728hashCode\u65b9\u6cd5\u7b2c\u4e00\u6b21\u88ab\u8bbf\u95ee\u65f6\u624d\u8fdb\u884c\u8ba1\u7b97<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u4e0d\u8981\u8bd5\u56fe\u6392\u9664\u5173\u952e\u57df(equals\u7528\u5230\u7684\u6240\u6709\u57df)\u6765\u63d0\u9ad8\u6027\u80fd\uff0c\u8fd9\u6837\u867d\u7136\u4f1a\u63d0\u9ad8hashCode\u8ba1\u7b97\u901f\u5ea6\uff0c\u4f46\u662f\u4f1a\u63d0\u9ad8hashCode\u91cd\u590d\u7387\uff0c\u53cd\u800c\u964d\u4f4e\u6563\u5217\u6027\u80fd\u3002<\/p>\n\n<h2 id=\"10\u59cb\u7ec8\u8981\u8986\u76d6tostring\"><code class=\"language-plaintext highlighter-rouge\">10<\/code>.\u59cb\u7ec8\u8981\u8986\u76d6toString<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u4f18\u70b9\uff1a\u6613\u4e8e\u9605\u8bfb\uff0c\u6613\u4e8e\u8c03\u8bd5\uff0c\u6613\u4e0e\u5176\u4ed6\u5e94\u7528\u4ea4\u6362\u6570\u636e<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u63d0\u4f9b\u4e00\u4e2a\u9759\u6001\u5de5\u5382\u7528\u4e8e\u5c06toString\u8fd4\u56de\u503c\u8f6c\u6362\u4e3a\u672c\u8eab\u7684\u7c7b\u578b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5728\u6587\u6863\u4e2d\u660e\u786e\u8868\u793a\u662f\u5426\u89c4\u5b9a\u4e86toString\u7684\u683c\u5f0f\uff0c\u5982\u679c\u89c4\u5b9a\u4e86\u683c\u5f0f\u5c31\u8981\u4e25\u683c\u9075\u5b88<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5bf9toString\u8fd4\u56de\u503c\u4e2d\u5305\u542b\u7684\u5173\u952e\u5185\u5bb9\u63d0\u4f9b\u8bbf\u95ee\u65b9\u6cd5<\/p>\n\n<h2 id=\"11\u8c28\u614e\u5730\u8986\u76d6clone\"><code class=\"language-plaintext highlighter-rouge\">11<\/code>.\u8c28\u614e\u5730\u8986\u76d6clone<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5b9e\u73b0Cloneable\u63a5\u53e3(\u7a7a\u63a5\u53e3)\u9700\u8981\u63d0\u4f9b\u4e00\u4e2a<code class=\"language-plaintext highlighter-rouge\">public clone<\/code>(Object\u4e2d\u58f0\u660e\u4e3a<code class=\"language-plaintext highlighter-rouge\">proteced<\/code>)\u65b9\u6cd5<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u4ecejdk1.5\u5f00\u59cb\uff0c\u5f15\u5165\u4e86<code class=\"language-plaintext highlighter-rouge\">\u534f\u53d8\u8fd4\u56de\u7c7b\u578b<\/code>\uff0cclone\u65b9\u6cd5\u88ab\u8986\u76d6\u540e\u53ef\u4ee5\u8fd4\u56deObject\u7684\u5b50\u7c7b\u578b\uff08\u901a\u5219\uff1a\u6c38\u8fdc\u4e0d\u8981\u8ba9\u5ba2\u6237\u53bb\u505a\u4efb\u4f55\u7c7b\u5e93\u80fd\u5b8c\u6210\u7684\u4e8b\u60c5\uff09<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.clone\u65b9\u6cd5\u5c31\u662f\u53e6\u4e00\u4e2a\u6784\u9020\u5668\uff1b\u5fc5\u987b\u786e\u4fdd\u5b83\u4e0d\u4f1a\u4f24\u5bb3\u5230\u539f\u59cb\u5bf9\u8c61\uff0c\u5e76\u786e\u4fdd\u6b63\u786e\u5730\u521b\u5efa\u88ab\u514b\u9686\u5bf9\u8c61\u4e2d\u7684\u7ea6\u675f\u6761\u4ef6\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.clone\u67b6\u6784\u4e0e\u5f15\u7528\u53ef\u53d8\u5bf9\u8c61\u7684<code class=\"language-plaintext highlighter-rouge\">final<\/code>\u57df\u7684\u6b63\u5e38\u7528\u6cd5\u662f\u4e0d\u76f8\u517c\u5bb9\u7684\uff0c\u4e3a\u4e86\u4f7f\u7c7b\u53efclone\uff0c\u6709\u65f6\u9700\u8981\u53bb\u6389\u4e00\u4e9bfinal<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">\u6df1\u62f7\u8d1d<\/code>\uff0c\u9012\u5f52\u5730\u8c03\u7528\u6bcf\u4e2a\u57df\u4e2d\u5305\u542b\u7684\u57df\uff0c\u4e00\u76f4\u6df1\u5165\u5230\u4e0d\u53ef\u53d8\u7c7b\u4e3a\u6b62<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u62f7\u8d1d\u201d\u957f\u201d\u5bf9\u8c61(\u6570\u7ec4\uff0c\u94fe\u8868\u7b49)\u65f6\uff0c\u5982\u679c\u4f7f\u7528<strong>\u9012\u5f52<\/strong>\u4f1a\u521b\u5efa\u5f88\u591a\u6307\u9488\u6d88\u8017\u6808\u7a7a\u95f4\uff0c\u53ef\u4ee5\u8003\u8651\u6362\u6210<strong>\u8fed\u4ee3<\/strong><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">7<\/code>.\u53e6\u4e00\u79cd\u65b9\u6cd5\uff1a\u5148\u8c03\u7528super.clone()\uff0c\u5c06\u6240\u6709\u57df\u8bbe\u4e3a0\u503c\uff0c\u7136\u540e\u4e3a\u5176\u8d4b\u503c\u65b0\u5bf9\u8c61\u3002\u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u5408\u7406\uff0c\u4f46\u662f\u6ca1\u6709\u201d\u76f4\u63a5\u64cd\u4f5c\u5bf9\u8c61\u53ca\u5176\u57df\u4e2d\u5bf9\u8c61\u7684clone\u65b9\u6cd5\u201c\u5feb\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">8<\/code>.clone\u8fc7\u7a0b\u4e2d\u4e0d\u5e94\u8be5\u8c03\u7528\u4efb\u4f55\u975efinal\u65b9\u6cd5(\u5982\u679c\u662fprivate\u65b9\u6cd5\u5219\u4e0d\u9700\u8981final)\uff0c\u56e0\u4e3a\u5b50\u7c7b\u6709\u673a\u4f1a\u6539\u53d8\u8be5\u65b9\u6cd5\u7684\u884c\u4e3a\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">9<\/code>.\u91cd\u5199\u7684<code class=\"language-plaintext highlighter-rouge\">public clone<\/code>\u65b9\u6cd5\u5e94\u8be5\u5ffd\u7565<code class=\"language-plaintext highlighter-rouge\">CloneNotSupportedException<\/code>\uff0c\u4f46\u5982\u679c<\/p>\n\n<p>\u8be5\u7c7b\u662f\u7528\u6765\u88ab\u7ee7\u627f\u7684\uff0c\u5219\u5e94\u8be5\u6a21\u62dfObject.clone\uff1a\u58f0\u660e\u4e3aprotected\uff0c\u629b\u51fa\u5f02\u5e38\uff0c\u4e0d\u5b9e\u73b0Cloneable\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">10<\/code>.\u5bf9\u4e8e\u4e0d\u53ef\u53d8\u7c7b\uff0c\u63d0\u4f9bclone\u6ca1\u6709\u592a\u5927\u610f\u4e49<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">11<\/code>.\u7528<code class=\"language-plaintext highlighter-rouge\">\u62f7\u8d1d\u6784\u9020\u5668<\/code>(\u5373\u53c2\u6570\u7c7b\u578b\u4e3a\u7c7b\u672c\u8eab\u7684\u6784\u9020\u5668)\u6216\u8005<code class=\"language-plaintext highlighter-rouge\">\u62f7\u8d1d\u5de5\u5382<\/code>\u4ee3\u66ffclone\uff0c\u53ef\u4ee5\u589e\u52a0\u4e00\u4e2a\u53c2\u6570\u5b9e\u73b0\u514b\u9686\u5bf9\u8c61\u7684\u8f6c\u578b\uff08\u4f8b\u5982\u63a5\u53d7\u4e00\u4e2aCollection\u53c2\u6570\u4e0e\u4e00\u4e2aClass\u53c2\u6570\uff09<\/p>\n\n<h2 id=\"12\u8003\u8651\u5b9e\u73b0comparable\u63a5\u53e3\"><code class=\"language-plaintext highlighter-rouge\">12<\/code>.\u8003\u8651\u5b9e\u73b0Comparable\u63a5\u53e3<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u53ef\u4ee5\u65b9\u4fbf\u5730\u4f7f\u7528\u5404\u79cd\u6cdb\u578b\u7b97\u6cd5\u4e0eComparable\u7684\u96c6\u5408\u5b9e\u73b0<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5f3a\u70c8\u5efa\u8bae<code class=\"language-plaintext highlighter-rouge\">(x.compareTo(y) == 0) == (x.equals(y))<\/code>\uff0c\u4f46\u975e\u5fc5\u987b\uff0c\u82e5\u8fdd\u53cd\u4e86\u8fd9\u4e2a\u6761\u4ef6\uff0c\u5e94\u8be5\u4e88\u4ee5\u8bf4\u660e\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u4e0d\u6ee1\u8db3\u4e0a\u4e00\u6761\u7ea6\u5b9a\u7684\u5bf9\u8c61\u653e\u5165<code class=\"language-plaintext highlighter-rouge\">\u6709\u5e8f\u96c6\u5408<\/code>(\u4f7f\u7528compareTo\uff0c\u5982TreeSet)\u4e2d\u540e\uff0c\u5c06\u65e0\u6cd5\u9075\u5b88\u96c6\u5408\u63a5\u53e3\u901a\u7528(\u4f7f\u7528equals)\u7ea6\u5b9a\uff08\u5982BigDecimal\uff0c\u6d6e\u70b9\u6570\uff09<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u4f18\u5148\u7528<code class=\"language-plaintext highlighter-rouge\">\u7ec4\u5408+\u516c\u6709\u89c6\u56fe<\/code>\u7684\u65b9\u5f0f\u6269\u5c55\u503c\u7ec4\u4ef6\uff0c\u800c\u4e0d\u662f\u7528\u7ee7\u627f(\u540cequals)<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.Comparable\u53ea\u89c4\u5b9a\u4e86\u7b26\u53f7\uff0c\u6ca1\u6709\u89c4\u5b9a\u6570\u503c\u5927\u5c0f\uff0c\u53ef\u4ee5\u76f4\u63a5\u8fd4\u56de\u4e24\u4e2a\u6570\u503c\u76f8\u51cf\u7684\u7ed3\u679c\uff0c\u4f46\u662f\u8981\u5c0f\u5fc3\u6ea2\u51fa<\/p>\n\n<hr \/>\n\n<h1 id=\"\u4e09-\u7c7b\u548c\u63a5\u53e3\"><code class=\"language-plaintext highlighter-rouge\">\u4e09<\/code> \u7c7b\u548c\u63a5\u53e3<\/h1>\n\n<h2 id=\"13\u4f7f\u7c7b\u548c\u6210\u5458\u7684\u53ef\u8bbf\u95ee\u6027\u6700\u5c0f\u5316\"><code class=\"language-plaintext highlighter-rouge\">13<\/code>.\u4f7f\u7c7b\u548c\u6210\u5458\u7684\u53ef\u8bbf\u95ee\u6027\u6700\u5c0f\u5316<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5b9e\u4f8b\u57df\u51b3\u4e0d\u80fd\u662f\u516c\u6709\u7684<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u9759\u6001\u516c\u5171\u57df\u53ea\u80fd\u4e3afinal\u4fee\u9970\u7684\u57fa\u672c\u7c7b\u578b\u6216\u8005final\u4fee\u9970\u7684\u4e0d\u53ef\u53d8\u7c7b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u7528<code class=\"language-plaintext highlighter-rouge\">Collections.unmodifiableList(arr)<\/code><\/p>\n\n<p>\u5c06\u6570\u7ec4\u53d8\u6210\u4e0d\u53ef\u53d8\u5217\u8868\u540e\u518d\u63d0\u4f9b\u8bbf\u95ee\uff1b\u6216\u8005\u5728\u8bbf\u95ee\u65b9\u6cd5\u4e2d\u8fd4\u56de\u6570\u7ec4\u7684clone()<\/p>\n\n<h2 id=\"14\u5728\u516c\u6709\u7c7b\u4e2d\u4f7f\u7528\u8bbf\u95ee\u65b9\u6cd5\u800c\u975e\u516c\u6709\u57df\"><code class=\"language-plaintext highlighter-rouge\">14<\/code>.\u5728\u516c\u6709\u7c7b\u4e2d\u4f7f\u7528\u8bbf\u95ee\u65b9\u6cd5\u800c\u975e\u516c\u6709\u57df<\/h2>\n\n<p>\u66b4\u9732\u57df\u5c06\u5931\u53bb\u5185\u90e8\u8868\u793a\u6cd5\u7684\u7075\u6d3b\u6027\uff0c\u4e5f\u5c06\u5931\u53bb\u5bf9\u6570\u636e\u8bbf\u95ee\u8fdb\u884c\u9650\u5236\u7684\u80fd\u529b<\/p>\n\n<h2 id=\"15\u4f7f\u53ef\u53d8\u6027\u6700\u5c0f\u5316\"><code class=\"language-plaintext highlighter-rouge\">15<\/code>.\u4f7f\u53ef\u53d8\u6027\u6700\u5c0f\u5316<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u521b\u5efa\u4e0d\u53ef\u53d8\u7c7b\u76845\u6761\u89c4\u5219<\/p>\n\n<blockquote>\n  <p><code class=\"language-plaintext highlighter-rouge\">(1)<\/code>.\u4e0d\u8981\u63d0\u4f9b\u4efb\u4f55\u4f1a\u4fee\u6539\u5bf9\u8c61\u72b6\u6001\u7684\u65b9\u6cd5<\/p>\n\n  <p><code class=\"language-plaintext highlighter-rouge\">(2)<\/code>.\u4fdd\u8bc1\u7c7b\u4e0d\u4f1a\u88ab\u6269\u5c55(final\u6216\u8005\u6784\u9020\u5668\u79c1\u6709)<\/p>\n\n  <p><code class=\"language-plaintext highlighter-rouge\">(3)<\/code>.\u4f7f\u6240\u6709\u57df\u90fd\u662ffinal\u7684<\/p>\n\n  <p><code class=\"language-plaintext highlighter-rouge\">(4)<\/code>.\u4f7f\u6240\u6709\u57df\u6210\u4e3a\u79c1\u6709\u7684<\/p>\n\n  <p><code class=\"language-plaintext highlighter-rouge\">(5)<\/code>.\u786e\u4fdd\u5bf9\u4e8e\u4efb\u4f55\u53ef\u53d8\u7ec4\u4ef6\u7684\u4e92\u65a5\u8bbf\u95ee<\/p>\n<\/blockquote>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u7528\u516c\u6709\u7684\u9759\u6001\u57df\u6216\u9759\u6001\u5de5\u5382\u4e3a\u4e0d\u53ef\u53d8\u7c7b\u63d0\u4f9b\u7f13\u5b58<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>\u4e0d\u53ef\u53d8\u5bf9\u8c61\u672c\u8d28\u4e0a\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u5b83\u4eec\u4e0d\u8981\u6c42\u540c\u6b65\uff0c\u53ef\u4ee5\u88ab\u81ea\u7531\u5730\u5171\u4eab\uff0c\u6c38\u8fdc\u4e0d\u9700\u8981\u4fdd\u62a4\u6027\u62f7\u8d1d\uff0c\u4e0d\u9700\u8981\u62f7\u8d1d\u6784\u9020\u5668<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u4e0d\u53ef\u53d8\u7c7b\u53ef\u4ee5\u5171\u4eab\u5185\u90e8\u4fe1\u606f<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u4e0d\u53ef\u53d8\u5bf9\u8c61\u4e3a\u5176\u4ed6\u5bf9\u8c61\u63d0\u4f9b\u4e86\u5927\u91cf\u7684\u6784\u4ef6<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u4e0d\u53ef\u53d8\u7c7b\u7684\u7f3a\u70b9\uff1a\u6bcf\u4e00\u4e2a\u4e0d\u540c\u7684\u503c\u90fd\u9700\u8981\u4e00\u4e2a\u5355\u72ec\u7684\u5bf9\u8c61\uff0c\u5b58\u5728\u6027\u80fd\u95ee\u9898\uff0c\u53ef\u4ee5\u63d0\u4f9b1\u4e2a\u914d\u5957\u7c7b\u6765\u8fdb\u884c\u8fc7\u6e21\u64cd\u4f5c(\u5982StringBuilder)<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">7<\/code>.\u56e0\u5386\u53f2\u95ee\u9898\u6ca1\u6709\u8bbe\u7f6e\u6210final\u7684\u4e0d\u53ef\u53d8\u7c7b(\u5982<code class=\"language-plaintext highlighter-rouge\">BigInteger<\/code>)\uff0c\u5728\u4f7f\u7528\u65f6\u9700\u8981\u68c0\u67e5\u5bf9\u8c61\u662f\u5426\u88ab\u6269\u5c55\u4e86\uff0c\u5982\u679c\u88ab\u6269\u5c55\u4e86\u5c31\u53ef\u80fd\u9700\u8981\u4fdd\u62a4\u6027\u62f7\u8d1d<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">8<\/code>.\u5982\u679c\u5b9e\u73b0<code class=\"language-plaintext highlighter-rouge\">Serializable<\/code>\uff0c\u5fc5\u987b\u663e\u5f0f\u5730\u63d0\u4f9b<code class=\"language-plaintext highlighter-rouge\">readObject<\/code>\u548c<code class=\"language-plaintext highlighter-rouge\">readResolve<\/code>\u65b9\u6cd5\u6216\u8005\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">ObjectOutputStream.writeUnshared<\/code>\u548c<code class=\"language-plaintext highlighter-rouge\">ObjectInputStream.readUnshared<\/code>\u65b9\u6cd5<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">9<\/code>.\u9664\u975e\u6709\u5fc5\u987b\u7684\u7406\u7531\u8ba9\u7c7b\u53ef\u53d8\uff0c\u5426\u5219\u7c7b\u5e94\u8be5\u662f\u4e0d\u53ef\u53d8\u7684\uff1b\u5982\u679c\u7c7b\u65e0\u6cd5\u505a\u6210\u4e0d\u53ef\u53d8\u7684\uff0c\u4e5f\u5e94\u8be5\u5c3d\u529b\u9650\u5236\u5176\u53ef\u53d8\u6027\u3002\u56e0\u6b64\u57df\u4e5f\u5e94\u8be5\u662ffinal\u7684\u3002<\/p>\n\n<h2 id=\"16\u590d\u5408\u4f18\u5148\u4e8e\u7ee7\u627f\"><code class=\"language-plaintext highlighter-rouge\">16<\/code>.\u590d\u5408\u4f18\u5148\u4e8e\u7ee7\u627f<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u7ee7\u627f\u7834\u574f\u4e86\u5c01\u88c5\u6027\uff0c\u5b50\u7c7b\u4f9d\u8d56\u4e8e\u7236\u7c7b\u7684\u5b9e\u73b0\u7ec6\u8282\uff0c\u82e5\u7236\u7c7b\u5185\u90e8\u53d1\u751f\u53d8\u52a8\uff0c\u5c06\u53ef\u80fd\u635f\u574f\u5b50\u7c7b\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5047\u8bbe\u5b50\u7c7b\u8986\u76d6\u7236\u7c7b\u6240\u6709\u7684\u65b9\u6cd5\uff0c\u589e\u52a0\u4e86\u5bf9\u53c2\u6570\u7684\u7c7b\u578b\u68c0\u67e5\uff1b\u540e\u6765\u7236\u7c7b\u589e\u52a0\u4e86\u65b0\u65b9\u6cd5\uff0c\u800c\u5b50\u7c7b\u6ca1\u6709\u540c\u6b65\u66f4\u65b0\uff0c\u975e\u6cd5\u7684\u53c2\u6570\u5c06\u6709\u53ef\u80fd\u901a\u8fc7\u7c7b\u578b\u68c0\u67e5\uff0c\u8fd9\u5c06\u4f1a\u4ea7\u751f\u5b89\u5168\u6f0f\u6d1e<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5047\u8bbe\u5b50\u7c7b\u589e\u52a0\u4e86\u65b0\u65b9\u6cd5\uff0c\u540e\u6765\u7236\u7c7b\u4e5f\u65b0\u589e\u4e861\u4e2a\u7b7e\u540d\u76f8\u540c\u4f46\u8fd4\u56de\u7c7b\u578b\u4e0d\u540c\u7684\u65b9\u6cd5\uff0c\u7f16\u8bd1\u5c06\u4e0d\u901a\u8fc7\uff1b\u5982\u679c\u65b9\u6cd5\u7b7e\u540d\u4e0e\u8fd4\u56de\u7c7b\u578b\u90fd\u76f8\u540c\uff0c\u5c06\u5f62\u6210\u8986\u76d6\uff0c\u53c8\u56de\u5230\u4e86\u4e0a\u4e00\u79cd\u60c5\u51b5<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.<code class=\"language-plaintext highlighter-rouge\">\u590d\u5408\/\u8f6c\u53d1<\/code>\u7684\u7c7b\u79f0\u4e3a\u7ec4\u4ef6\uff0c\u5e76\u5b9e\u73b0\u76f8\u540c\u63a5\u53e3\u7684\u7c7b\u4e3a<code class=\"language-plaintext highlighter-rouge\">\u5305\u88c5\u7c7b<\/code>\uff0c\u6bcf\u4e2a\u63a5\u53e3\u53ea\u9700\u89811\u4e2a\u8f6c\u53d1\u7c7b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u5305\u88c5\u7c7b\u4e0d\u9002\u7528\u4e8e\u56de\u8c03\u6846\u67b6\uff0c\u56de\u8c03\u51fd\u6570\u4f20\u9012\u662f1\u4e2a\u6307\u5411\u81ea\u8eab\u7684\u5f15\u7528\uff0c\u907f\u5f00\u4e86\u5916\u9762\u7684\u5305\u88c5\u7c7b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u7ee7\u627f\u4f1a\u5c06api\u4e2d\u6240\u6709\u7f3a\u9677\u4f20\u64ad\u5230\u5b50\u7c7b\u4e2d\u53bb\uff0c\u800c\u590d\u5408\u5374\u53ef\u4ee5\u8bbe\u8ba1\u65b0\u7684api\u9690\u85cf\u7f3a\u9677<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">7<\/code>.\u53ea\u6709\u771f\u6b63\u5b58\u5728\u4ece\u5c5e\u5173\u7cfb\u65f6\uff0c\u624d\u5e94\u8be5\u4f7f\u7528\u7ee7\u627f<\/p>\n\n<h2 id=\"17\u8981\u4e48\u4e3a\u7ee7\u627f\u800c\u8bbe\u8ba1\u5e76\u63d0\u4f9b\u6587\u6863\u8bf4\u660e\u8981\u4e48\u5c31\u7981\u6b62\u7ee7\u627f\"><code class=\"language-plaintext highlighter-rouge\">17<\/code>.\u8981\u4e48\u4e3a\u7ee7\u627f\u800c\u8bbe\u8ba1\uff0c\u5e76\u63d0\u4f9b\u6587\u6863\u8bf4\u660e\uff0c\u8981\u4e48\u5c31\u7981\u6b62\u7ee7\u627f<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.<strong>\u51b3\u4e0d\u80fd\u5728\u6784\u9020\u5668\u4e2d\u8c03\u7528\u53ef\u4ee5\u88ab\u8986\u76d6\u7684\u65b9\u6cd5<\/strong>\uff0c\u5426\u5219\u8fd9\u6837\u7684\u65b9\u6cd5\u5c06\u4f1a\u5728\u5b50\u7c7b\u6784\u9020\u5668\u4e4b\u524d\u8fd0\u884c\uff0c\u82e5\u662f\u8be5\u65b9\u6cd5\u4e2d\u5b58\u5728\u5bf9\u57df\u7684\u8bbf\u95ee\uff0c\u5c06\u4f1a\u9020\u6210\u7a7a\u6307\u9488\u5f02\u5e38<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u7c7b\u5fc5\u987b\u63d0\u4f9b\u9002\u5f53\u7684hook\uff0c\u4ee5\u4fbf\u80fd\u591f\u8fdb\u5165\u5b50\u7c7b\u7684\u5185\u90e8\u5de5\u4f5c\u6d41\u7a0b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5982\u679c\u5b9e\u73b0\u4e86Cloneable\u6216Serializable\u63a5\u53e3\uff0c\u90a3\u4e48<code class=\"language-plaintext highlighter-rouge\">clone<\/code>\u4e0e<code class=\"language-plaintext highlighter-rouge\">readObject<\/code>\u90fd<strong>\u4e0d<\/strong>\u80fd\u8c03\u7528\u53ef\u88ab\u8986\u76d6\u7684\u65b9\u6cd5<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5982\u679c\u5b9e\u73b0\u4e86Serializable\u63a5\u53e3\uff0c\u5fc5\u987b\u4f7freadObject\u4e0ewriteReplace\u6210\u4e3a<strong>\u53d7\u4fdd\u62a4<\/strong>\u7684\u65b9\u6cd5\uff0c\u5426\u5219\u5b83\u4eec\u5c06\u4f1a\u88ab\u5b50\u7c7b\u5ffd\u7565\u6389<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u5982\u679c\u5fc5\u987b\u8ba9\u7c7b\u53ef\u88ab\u7ee7\u627f\uff0c<strong>\u52a1\u5fc5\u4fdd\u8bc1\u8fd9\u4e2a\u7c7b\u6c38\u8fdc\u4e0d\u4f1a\u8c03\u7528\u53ef\u8986\u76d6\u65b9\u6cd5<\/strong>\uff0c\u53ef\u4ee5\u673a\u68b0\u5730\u6d88\u9664\u53ef\u8986\u76d6\u65b9\u6cd5\u7684<code class=\"language-plaintext highlighter-rouge\">\u81ea\u7528\u6027<\/code>\uff1a\u5c06\u6bcf\u4e2a\u53ef\u8986\u76d6\u65b9\u6cd5\u7684\u65b9\u6cd5\u4f53\u79fb\u5230\u4e00\u4e2a\u79c1\u6709\u7684\u201c<code class=\"language-plaintext highlighter-rouge\">\u8f85\u52a9\u65b9\u6cd5<\/code>\u4e2d\u201d\uff0c\u7136\u540e\u8ba9\u53ef\u8986\u76d6\u65b9\u6cd5\u8c03\u7528\u8f85\u52a9\u65b9\u6cd5\u5b9e\u73b0\u529f\u80fd\uff0c\u8fd9\u6837\u53ef\u4ee5\u786e\u4fdd\u53ef\u8986\u76d6\u65b9\u6cd5\u6c38\u8fdc\u4e0d\u4f1a\u5e72\u6d89\u5230\u7236\u7c7b\u7684\u8fd0\u884c\u3002<\/p>\n\n<h2 id=\"18\u63a5\u53e3\u4f18\u4e8e\u62bd\u8c61\u7c7b\"><code class=\"language-plaintext highlighter-rouge\">18<\/code>.\u63a5\u53e3\u4f18\u4e8e\u62bd\u8c61\u7c7b<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u73b0\u6709\u7684\u7c7b\u6613\u88ab\u66f4\u65b0\uff0c\u4ee5\u5b9e\u73b0\u65b0\u7684\u63a5\u53e3<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u63a5\u53e3\u662f\u5b9a\u4e49mixin\uff08\u6df7\u5408\u7c7b\u578b\uff09\u7406\u60f3\u9009\u62e9<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u63a5\u53e3\u5141\u8bb8\u6211\u4eec\u6784\u9020\u975e\u5c42\u6b21\u63a5\u53e3\u7684\u7c7b\u578b\u6846\u67b6<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5728\u5305\u88c5\u7c7b\u6a21\u5f0f\u4e0b\uff0c\u63a5\u53e3\u4f7f\u5f97\u5b89\u5168\u5730\u589e\u5f3a\u7c7b\u7684\u529f\u80fd\u6210\u4e3a\u53ef\u80fd<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u901a\u8fc7\u5bf9\u5bfc\u51fa\u7684\u6bcf\u4e2a\u63a5\u53e3\u90fd\u63d0\u4f9b\u4e00\u4e2a<code class=\"language-plaintext highlighter-rouge\">\u9aa8\u67b6\u5b9e\u73b0<\/code>\uff08skeletal implementation\uff09\u7c7b\uff0c\u628a\u63a5\u53e3\u548c\u62bd\u8c61\u7c7b\u7684\u4f18\u70b9\u7ed3\u5408\u8d77\u6765<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u5b9e\u73b0\u4e86\u63a5\u53e3\u7684\u7c7b\u53ef\u4ee5\u628a\u5bf9\u4e8e\u63a5\u53e3\u65b9\u6cd5\u7684\u8c03\u7528\u8f6c\u53d1\u5230\u4e00\u4e2a\u5185\u90e8\u79c1\u6709\u7c7b\u7684\u5b9e\u4f8b\u4e0a\uff0c\u8fd9\u4e2a\u5185\u90e8\u79c1\u6709\u7c7b\u6269\u5c55\u4e86\u9aa8\u67b6\u5b9e\u73b0\u7c7b\uff0c\u8fd9\u79cd\u65b9\u6cd5\u88ab\u79f0\u4e3a\u201c<code class=\"language-plaintext highlighter-rouge\">\u591a\u91cd\u6a21\u62df\u7ee7\u627f<\/code>\u201d\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">7<\/code>.\u62bd\u8c61\u7c7b\u6bd4\u63a5\u53e3\u66f4\u6613\u4e8e\u6269\u5c55\uff0c\u62bd\u8c61\u7c7b\u53ef\u4ee5\u76f4\u63a5\u589e\u52a0\u65b9\u6cd5\uff0c\u63a5\u53e3\u5374\u4e0d\u53ef\u4ee5\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">8<\/code>.\u63a5\u53e3\u4e00\u65e6\u88ab\u516c\u5f00\u53d1\u884c\uff0c\u5e76\u4e14\u5df2\u88ab\u5e7f\u6cdb\u5b9e\u73b0\uff0c\u518d\u60f3\u6539\u53d8\u63a5\u53e3\u662f\u4e0d\u53ef\u80fd\u7684\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">9<\/code>.\u63a5\u53e3\u901a\u5e38\u662f\u5b9a\u4e49\u5141\u8bb8\u591a\u4e2a\u5b9e\u73b0\u7684\u7c7b\u578b\u7684\u6700\u4f73\u9014\u5f84\uff0c\u4f46\u662f\u5f53<strong>\u6f14\u53d8<\/strong>\u7684\u5bb9\u6613\u6027\u6bd4<strong>\u7075\u6d3b\u6027<\/strong>\u548c<strong>\u529f\u80fd\u6027<\/strong>\u66f4\u91cd\u8981\u65f6\u4f8b\u5916\u3002<\/p>\n\n<h2 id=\"19\u63a5\u53e3\u53ea\u7528\u4e8e\u5b9a\u4e49\u7c7b\u578b\"><code class=\"language-plaintext highlighter-rouge\">19<\/code>.\u63a5\u53e3\u53ea\u7528\u4e8e\u5b9a\u4e49\u7c7b\u578b<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5e38\u91cf\u63a5\u53e3\u6a21\u5f0f\u662f\u5bf9\u63a5\u53e3\u7684\u4e0d\u826f\u4f7f\u7528<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5982\u679c\u8fd9\u4e9b\u5e38\u91cf\u6700\u597d\u88ab\u770b\u4f5c\u679a\u4e3e\u7c7b\u578b\u7684\u6210\u5458\uff0c\u5c31\u5e94\u8be5\u662f<code class=\"language-plaintext highlighter-rouge\">\u679a\u4e3e\u7c7b\u578b<\/code>\uff0c\u5426\u5219\u5e94\u8be5\u4f7f\u7528\u4e0d\u53ef\u5b9e\u4f8b\u5316\u7684\u5de5\u5177\u7c7b\u6765\u5bfc\u51fa\u8fd9\u4e9b\u5e38\u91cf\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5982\u679c\u5927\u91cf\u5229\u7528\u5de5\u5177\u7c7b\u6765\u5bfc\u51fa\u5e38\u91cf\uff0c\u53ef\u4ee5\u901a\u8fc7\u5229\u7528<code class=\"language-plaintext highlighter-rouge\">\u9759\u6001\u5bfc\u5165<\/code>\u673a\u5236\uff0c\u907f\u514d\u7528\u7c7b\u540d\u6765\u4fee\u9970\u5e38\u91cf\u540d\u3002\uff081.5\u7248\u672c\u540e\uff09<\/p>\n\n<h2 id=\"20\u7c7b\u5c42\u6b21\u4f18\u4e8e\u6807\u7b7e\u7c7b\"><code class=\"language-plaintext highlighter-rouge\">20<\/code>.\u7c7b\u5c42\u6b21\u4f18\u4e8e\u6807\u7b7e\u7c7b<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u6807\u7b7e\u7c7b\u8fc7\u4e8e\u5197\u957f\uff0c\u5bb9\u6613\u51fa\u9519\uff0c\u5e76\u4e14\u6548\u7387\u4f4e\u4e0b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u7f16\u8bd1\u5668\u786e\u4fdd\u6bcf\u4e2a\u7c7b\u7684\u6784\u9020\u5668\u90fd\u521d\u59cb\u5316\u5b83\u7684\u6570\u636e\u57df\uff0c\u5bf9\u4e8e\u6839\u7c7b\u4e2d\u58f0\u660e\u7684\u6bcf\u4e2a\u62bd\u8c61\u65b9\u6cd5\uff0c\u90fd\u786e\u4fdd\u6709\u4e00\u4e2a\u5b9e\u73b0\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u7c7b\u5c42\u6b21\u7684\u53e6\u4e00\u79cd\u597d\u5904\u5728\u4e8e\uff0c\u5b83\u4eec\u53ef\u4ee5\u7528\u6765\u53cd\u6620\u7c7b\u578b\u4e4b\u95f4\u672c\u8d28\u4e0a\u7684\u5c42\u6b21\u5173\u7cfb\uff0c\u6709\u52a9\u4e8e\u589e\u5f3a\u7075\u6d3b\u6027\uff0c\u5e76\u8fdb\u884c\u66f4\u597d\u7684\u7f16\u8bd1\u65f6\u7c7b\u578b\u68c0\u67e5\u3002<\/p>\n\n<h2 id=\"21\u7528\u51fd\u6570\u5bf9\u8c61\u8868\u793a\u7b56\u7565\"><code class=\"language-plaintext highlighter-rouge\">21<\/code>.\u7528\u51fd\u6570\u5bf9\u8c61\u8868\u793a\u7b56\u7565<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5982\u679c\u4e00\u4e2a\u7c7b\u4ec5\u4ec5\u5bfc\u51fa\u4e00\u4e2a\u65b9\u6cd5\uff0c\u5b83\u7684\u5b9e\u4f8b\u5b9e\u9645\u4e0a\u5c31\u7b49\u540c\u4e8e\u4e00\u4e2a\u6307\u5411\u8be5\u65b9\u6cd5\u7684\u6307\u9488\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u8bbe\u8ba1\u5177\u4f53\u7684\u7b56\u7565\u7c7b\u65f6\uff0c\u8fd8\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u7b56\u7565\u63a5\u53e3<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5982\u679c\u5b83\u88ab\u91cd\u590d\u6267\u884c\uff0c\u8003\u8651\u5c06\u51fd\u6570\u5bf9\u8c61\u5b58\u50a8\u5230\u4e00\u4e2a\u79c1\u6709\u7684\u9759\u6001final\u57df\u91cc\uff0c\u5e76\u91cd\u7528\u5b83\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5bbf\u4e3b\u7c7b\u53ef\u4ee5\u5bfc\u51fa\u516c\u6709\u7684\u9759\u6001\u57df\uff08\u6216\u9759\u6001\u5de5\u5382\u65b9\u6cd5\uff09\uff0c\u5176\u7c7b\u578b\u4e3a\u7b56\u7565\u63a5\u53e3\uff0c\u5177\u4f53\u7684\u7b56\u7565\u7c7b\u53ef\u4ee5\u662f\u5bbf\u4e3b\u7c7b\u7684\u79c1\u6709\u5d4c\u5957\u7c7b\u3002<\/p>\n\n<h2 id=\"22\u4f18\u5148\u8003\u8651\u9759\u6001\u6210\u5458\u7c7b\"><code class=\"language-plaintext highlighter-rouge\">22<\/code>.\u4f18\u5148\u8003\u8651\u9759\u6001\u6210\u5458\u7c7b<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5d4c\u5957\u7c7b\u5b58\u5728\u7684\u76ee\u7684\u5e94\u8be5\u53ea\u662f\u4e3a\u5b83\u7684\u5916\u56f4\u7c7b\u63d0\u4f9b\u670d\u52a1\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5d4c\u5957\u7c7b\u6709\u56db\u79cd\uff1a<code class=\"language-plaintext highlighter-rouge\">\u9759\u6001\u6210\u5458\u7c7b<\/code>\uff0c<code class=\"language-plaintext highlighter-rouge\">\u975e\u9759\u6001\u6210\u5458\u7c7b<\/code>\uff0c<code class=\"language-plaintext highlighter-rouge\">\u533f\u540d\u7c7b<\/code>\uff0c<code class=\"language-plaintext highlighter-rouge\">\u5c40\u90e8\u7c7b<\/code><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u975e\u9759\u6001\u6210\u5458\u7c7b\u6bcf\u4e2a\u5b9e\u4f8b\u90fd\u9690\u542b\u7740\u4e0e\u5916\u56f4\u7c7b\u7684\u4e00\u4e2a\u5b9e\u4f8b\u76f8\u5173\u8054\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5982\u679c\u5d4c\u5957\u7c7b\u7684\u5b9e\u4f8b\u53ef\u4ee5\u5728\u5b83\u7684\u5916\u56f4\u7c7b\u7684\u5b9e\u4f8b\u4e4b\u5916\u72ec\u7acb\u5b58\u5728\uff0c\u8fd9\u4e2a\u5d4c\u5957\u7c7b\u5c31\u5fc5\u987b\u662f\u9759\u6001\u6210\u5458\u7c7b\uff1b\u5728\u6ca1\u6709\u5916\u56f4\u5b9e\u4f8b\u7684\u60c5\u51b5\u4e0b\uff0c\u60f3\u521b\u5efa\u975e\u9759\u6001\u6210\u5458\u7c7b\u7684\u5b9e\u4f8b\u662f\u4e0d\u53ef\u80fd\u7684\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u975e\u9759\u6001\u6210\u5458\u7c7b\u7684\u4e00\u79cd\u5e38\u89c1\u7528\u6cd5\u662f\u5b9a\u4e49\u4e00\u4e2a<code class=\"language-plaintext highlighter-rouge\">Adapter<\/code>\uff0c\u5b83\u5141\u8bb8\u5916\u90e8\u7c7b\u7684\u5b9e\u4f8b\u88ab\u770b\u4f5c\u662f\u53e6\u4e00\u4e2a\u4e0d\u76f8\u5173\u7684\u7c7b\u7684\u5b9e\u4f8b\u3002\uff08\u5982\u96c6\u5408\u89c6\u56fe keySet iterator\uff09<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u5982\u679c\u58f0\u660e\u6210\u5458\u7c7b\u4e0d\u8981\u6c42\u8bbf\u95ee\u5916\u56f4\u5b9e\u4f8b\uff0c\u90a3\u6210\u5458\u7c7b\u5c31\u5e94\u8be5\u662f\u9759\u6001\u7684\u3002\u975e\u9759\u6001\u6210\u5458\u7c7b\u7684\u5b9e\u4f8b\u5fc5\u987b\u8981\u6709\u4e00\u4e2a\u5916\u56f4\u7684\u5b9e\u4f8b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">7<\/code>.\u79c1\u6709\u9759\u6001\u6210\u5458\u7c7b\u7684\u4e00\u79cd\u5e38\u89c1\u7528\u6cd5\u662f\u7528\u6765\u4ee3\u8868\u5916\u56f4\u7c7b\u6240\u4ee3\u8868\u7684\u5bf9\u8c61\u7684\u7ec4\u4ef6\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">8<\/code>.\u533f\u540d\u7c7b\u7684\u5e38\u89c1\u7528\u6cd5\u662f\u2460\u52a8\u6001\u5730\u521b\u5efa\u51fd\u6570\u5bf9\u8c61\uff08\u7b2c21\u6761\uff09\uff0c\u2461\u521b\u5efa\u5bf9\u8c61\u8fc7\u7a0b\uff08Runabel,Thead,TimerTask\uff09,\u2462\u5728\u9759\u6001\u5de5\u5382\u65b9\u6cd5\u7684\u5185\u90e8<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">9<\/code>.\u5728\u4efb\u4f55\u53ef\u4ee5\u58f0\u660e\u5c40\u90e8\u53d8\u91cf\u7684\u5730\u65b9\uff0c\u90fd\u53ef\u4ee5\u58f0\u660e\u5c40\u90e8\u7c7b\uff0c\u5e76\u4e14\u5c40\u90e8\u7c7b\u4e5f\u9075\u5b88\u540c\u6837\u7684\u4f5c\u7528\u57df\u89c4\u5219\u3002<\/p>\n\n<hr \/>\n\n<h1 id=\"\u56db-\u6cdb\u578b\"><code class=\"language-plaintext highlighter-rouge\">\u56db<\/code> \u6cdb\u578b<\/h1>\n\n<h2 id=\"23\u4e0d\u8981\u5728\u65b0\u4ee3\u7801\u4e2d\u4f7f\u7528\u539f\u751f\u6001\u7c7b\u578b\"><code class=\"language-plaintext highlighter-rouge\">23<\/code>.\u4e0d\u8981\u5728\u65b0\u4ee3\u7801\u4e2d\u4f7f\u7528\u539f\u751f\u6001\u7c7b\u578b<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u9519\u8bef\u5e94\u8be5\u5c3d\u65e9\u53d1\u73b0\uff0c\u6700\u597d\u5728\u7f16\u8bd1\u671f\u5c31\u53d1\u73b0\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5982\u679c\u4f7f\u7528\u539f\u751f\u7c7b\u578b\uff0c\u5c31\u5931\u53bb\u4e86\u6cdb\u578b\u5728\u5b89\u5168\u6027\u548c\u8868\u8ff0\u6027\u65b9\u9762\u7684\u6240\u6709\u4f18\u52bf<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5728\u4e0d\u5728\u4e4e\u96c6\u5408\u4e2d\u7684\u5143\u7d20\u7c7b\u578b\u65f6\uff0c\u4f7f\u7528<strong>\u65e0\u9650\u5236\u7684\u901a\u914d\u7b26<\/strong>\u7c7b\u578b\uff08<code class=\"language-plaintext highlighter-rouge\">&lt;?&gt;<\/code>\uff09<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5728\u7c7b\u6587\u5b57\u4e2d\u5fc5\u987b\u4f7f\u7528\u539f\u751f\u6001\u7c7b\u578b\uff1b\u56e0\u4e3a\u6cdb\u578b\u4f1a\u88ab\u64e6\u9664\uff0c\u6240\u4ee5<code class=\"language-plaintext highlighter-rouge\">instanceof<\/code>\u64cd\u4f5c\u7b26\u4f7f\u7528\u539f\u751f\u7c7b\u578b\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n\n<h2 id=\"24\u6d88\u9664\u975e\u53d7\u68c0\u8b66\u544a\"><code class=\"language-plaintext highlighter-rouge\">24<\/code>.\u6d88\u9664\u975e\u53d7\u68c0\u8b66\u544a<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u6cdb\u578b\u76f8\u5173\u7684\u7f16\u8bd1\u8b66\u544a\uff1a<\/p>\n\n<blockquote>\n  <ul>\n    <li>\n      <p>\u975e\u53d7\u68c0\u5f3a\u5236\u8f6c\u5316\u8b66\u544a\uff08unchecked cast warnnings\uff09<\/p>\n    <\/li>\n    <li>\n      <p>\u975e\u53d7\u68c0\u65b9\u6cd5\u8c03\u7528\u8b66\u544a<\/p>\n    <\/li>\n    <li>\n      <p>\u975e\u53d7\u68c0\u666e\u901a\u6570\u7ec4\u521b\u5efa\u8b66\u544a<\/p>\n    <\/li>\n    <li>\n      <p>\u975e\u53d7\u68c0\u8f6c\u6362\u8b66\u544a\uff08unchecked conversion warnings\uff09<\/p>\n    <\/li>\n  <\/ul>\n<\/blockquote>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u8981\u5c3d\u53ef\u80fd\u5730\u6d88\u9664\u6bcf\u4e00\u4e2a\u975e\u53d7\u68c0\u8b66\u544a<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5982\u679c\u65e0\u6cd5\u6d88\u9664\u8b66\u544a\uff0c\u53ef\u4ee5\u540c\u65f6\u8bc1\u660e\u5f15\u8d77\u8b66\u544a\u7684\u4ee3\u7801\u662f\u7c7b\u578b\u5b89\u5168\u7684\uff0c\u53ea\u6709\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u624d\u53ef\u4ee5\u7528\u4e00\u4e2a<code class=\"language-plaintext highlighter-rouge\">@SuppressWarnings(\"unchecked\")<\/code>\u6ce8\u89e3\u6765\u7981\u6b62\u8fd9\u6761\u8b66\u544a\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.SuppressWarnings\u6ce8\u89e3\u53ef\u4ee5\u7528\u5728\u4efb\u4f55\u7c92\u5ea6\u7684\u7ea7\u522b\u4e2d\uff0c\u5e94\u8be5\u59cb\u7ec8\u5728\u5c3d\u53ef\u80fd\u5c0f\u7684\u8303\u56f4\u4e2d\u4f7f\u7528\u5b83\uff0c\u6c38\u8fdc\u4e0d\u8981\u5728\u6574\u4e2a\u7c7b\u4e2d\u4f7f\u7528\u5b83<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u5982\u679c\u5728\u957f\u5ea6\u4e0d\u6b62\u4e00\u884c\uff08\u5373\u4e00\u884c\u4ee3\u7801\u4e2d\u5b58\u5728\u591a\u4e2a\u52a8\u4f5c\uff09\u7684\u4ee3\u7801\u4e2d\u4f7f\u7528\u4e86SuppressWarnings\u6ce8\u89e3\uff0c\u53ef\u4ee5\u5c06\u5b83\u79fb\u5230\u4e00\u4e2a\u5c40\u90e8\u53d8\u91cf\u58f0\u660e\u4e2d\uff0c\u4ee5\u51cf\u5c0fSuppressWarnings\u6ce8\u89e3\u7684\u5f71\u54cd\u8303\u56f4\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u6bcf\u5f53\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">@SuppressWarnings(\"unchecked\")<\/code>\u65f6\uff0c\u90fd\u8981\u6dfb\u52a0\u4e00\u6761\u6ce8\u91ca\uff0c\u8bf4\u660e\u4e3a\u4ec0\u4e48\u8fd9\u4e48\u505a\u662f\u5b89\u5168\u7684\u3002<\/p>\n\n<h2 id=\"25\u5217\u8868\u4f18\u5148\u4e8e\u6570\u7ec4\"><code class=\"language-plaintext highlighter-rouge\">25<\/code>.\u5217\u8868\u4f18\u5148\u4e8e\u6570\u7ec4<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u6570\u7ec4\u4e0e\u6cdb\u578b\u7684\u533a\u522b<\/p>\n\n<blockquote>\n  <ul>\n    <li>\n      <p>\u6570\u7ec4\u662f<code class=\"language-plaintext highlighter-rouge\">\u534f\u53d8<\/code>\u7684\uff0c\u5982\u679c<code class=\"language-plaintext highlighter-rouge\">sub<\/code>\u4e3a<code class=\"language-plaintext highlighter-rouge\">super<\/code>\u7684\u5b50\u7c7b\u578b\uff0c\u90a3\u4e48<code class=\"language-plaintext highlighter-rouge\">sub[]<\/code>\u4e5f\u662f<code class=\"language-plaintext highlighter-rouge\">super[]<\/code>\u7684\u5b50\u7c7b\u578b\uff1b\u76f8\u53cd\uff0c\u6cdb\u578b\u5219\u662f<code class=\"language-plaintext highlighter-rouge\">\u4e0d\u53ef\u53d8<\/code>\u7684\uff0c\u5bf9\u4e8e\u4e24\u4e2a\u7c7b\u578b<code class=\"language-plaintext highlighter-rouge\">Type1<\/code>\u4e0e<code class=\"language-plaintext highlighter-rouge\">Type2<\/code>\uff0c<code class=\"language-plaintext highlighter-rouge\">List&lt;Type1&gt;<\/code>\u4e0e<code class=\"language-plaintext highlighter-rouge\">List&lt;Type2&gt;<\/code>\u6ca1\u6709\u4efb\u4f55\u5173\u7cfb\u3002<\/p>\n    <\/li>\n    <li>\n      <p>\u6570\u7ec4\u662f<code class=\"language-plaintext highlighter-rouge\">\u5177\u4f53\u5316<\/code>\u7684\uff0c\u56e0\u6b64\u6570\u7ec4\u5728\u8fd0\u884c\u65f6\u624d\u77e5\u9053\u5e76\u68c0\u67e5\u5b83\u7684\u5143\u7d20\u7c7b\u578b\u7ea6\u675f\uff1b\u800c\u6cdb\u578b\u5219\u662f\u901a\u8fc7\u64e6\u9664\uff08erasure\uff09\u6765\u5b9e\u73b0\u7684\uff0c\u6cdb\u578b\u53ea\u5728\u7f16\u8bd1\u65f6\u5f3a\u5316\u7c7b\u578b\u4fe1\u606f\uff0c\u5e76\u5728\u8fd0\u884c\u65f6\u64e6\u9664\u5143\u7d20\u7c7b\u578b\u4fe1\u606f\uff0c\u64e6\u9664\u53ef\u4ee5\u4f7f\u6cdb\u578b\u4e0e\u65e9\u671f\u65e0\u6cdb\u578b\u7684\u4ee3\u7801\u517c\u5bb9\u3002<\/p>\n    <\/li>\n  <\/ul>\n<\/blockquote>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u6cdb\u578b\u4e0e\u6570\u7ec4\u4e0d\u80fd\u6df7\u5408\u4f7f\u7528\uff0c\u56e0\u4e3a\u6cdb\u578b\u6570\u7ec4\u4e0d\u662f\u7c7b\u578b\u5b89\u5168\u7684\u3002\uff08\u56e0\u4e3a\u6570\u7ec4\u662f\u534f\u53d8\u7684\uff0c\u6240\u4ee5\u6570\u7ec4\u53ef\u4ee5\u81ea\u52a8\u5411\u4e0a\u8f6c\u578b\uff0c\u6211\u4eec\u53ef\u4ee5\u5f80\u5411\u4e0a\u8f6c\u578b\u540e\u7684\u6570\u7ec4\u4e2d\u63d2\u5165\u4e0e\u8f6c\u578b\u524d\u4e0d\u540c\u7684\u7c7b\u578b\u7684\u6570\u636e\uff0c\u800c\u501f\u8f6c\u578b\u524d\u6570\u7ec4\u540d\u4e49\u53d6\u51fa\u7684\u5bf9\u8c61\u5c06\u4f1a\u4ea7\u751fCalssCastException\uff09<\/p>\n\n<div class=\"language-plaintext highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code>List&lt;String&gt;[] stringLists = new List&lt;String&gt;[];\nList&lt;Integer&gt; intList = Arrays.asList(42);\nObject[] objects = stringLists;\nobjects[0] = intList;\nString s = stringLists[0].get(0);\n<\/code><\/pre><\/div><\/div>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u6bcf\u5f53\u8c03\u7528\u53ef\u53d8\u53c2\u6570\u65b9\u6cd5\u65f6\uff0c\u5c31\u4f1a\u521b\u5efa\u4e00\u4e2a\u6570\u7ec4\u6765\u5b58\u653e\u53c2\u6570\uff0c\u5982\u679c\u8fd9\u4e2a\u6570\u7ec4\u7684\u5143\u7d20\u7c7b\u578b\u4e0d\u662f\u53ef\u5177\u4f53\u5316\u7684\uff0c\u5c31\u4f1a\u5f97\u5230\u4e00\u6761\u8b66\u544a\uff0c\u9664\u4e86\u7981\u6b62\u8fd9\u4e2a\u8b66\u544a\uff0c\u522b\u65e0\u4ed6\u6cd5\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u6570\u7ec4\u63d0\u4f9b\u4e86\u8fd0\u884c\u65f6\u7684\u7c7b\u578b\u5b89\u5168\uff0c\u4f46\u662f\u6ca1\u6709\u63d0\u4f9b\u7f16\u8bd1\u65f6\u7684\u7c7b\u578b\u5b89\u5168\uff1b\u6cdb\u578b\u63d0\u4f9b\u4e86\u7f16\u8bd1\u65f6\u7684\u7c7b\u578b\u5b89\u5168\uff0c\u4f46\u662f\u6ca1\u6709\u63d0\u4f9b\u8fd0\u884c\u65f6\u7684\u7c7b\u578b\u5b89\u5168\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u4e0d\u53ef\u5177\u4f53\u5316\u7684\u7c7b\u578b\u6570\u7ec4\u8f6c\u6362\u53ea\u80fd\u5728\u7279\u6b8a\u60c5\u51b5\u4e0b\u4f7f\u7528\u3002<\/p>\n\n<h2 id=\"26\u4f18\u5148\u8003\u8651\u6cdb\u578b\"><code class=\"language-plaintext highlighter-rouge\">26<\/code>.\u4f18\u5148\u8003\u8651\u6cdb\u578b<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u7981\u6b62\u6570\u7ec4\u7c7b\u578b\u7684\u672a\u53d7\u68c0\u8f6c\u6362\u6bd4\u7981\u6b62\u6807\u91cf\u7c7b\u578b\u7684\u66f4\u52a0\u5371\u9669<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u4f7f\u7528\u6cdb\u578b\u6bd4\u4f7f\u7528\u9700\u8981\u5728\u5ba2\u6237\u7aef\u4ee3\u7801\u4e2d\u8fdb\u884c\u8f6c\u6362\u7684\u7c7b\u578b\u66f4\u52a0\u5b89\u5168\uff0c\u4e5f\u66f4\u52a0\u5bb9\u6613\uff0c\u5728\u8bbe\u8ba1\u65b0\u7c7b\u578b\u7684\u65f6\u5019\uff0c\u8981\u786e\u4fdd\u4e0d\u9700\u8981\u8fd9\u79cd\u8f6c\u6362\u5c31\u80fd\u4f7f\u7528\u3002<\/p>\n\n<h2 id=\"27\u4f18\u5148\u8003\u8651\u6cdb\u578b\u65b9\u6cd5\"><code class=\"language-plaintext highlighter-rouge\">27<\/code>.\u4f18\u5148\u8003\u8651\u6cdb\u578b\u65b9\u6cd5<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5982\u679c\u6cdb\u578b\u65b9\u6cd5\u8fd4\u56de\u7684\u5bf9\u8c61\u662f\u65e0\u72b6\u6001\u7684\uff0c\u53ef\u4ee5\u8003\u8651\u5c06\u8be5\u5bf9\u8c61\u505a\u6210<code class=\"language-plaintext highlighter-rouge\">\u6cdb\u578b\u5355\u4f8b<\/code><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u8c03\u7528\u6cdb\u578b\u65b9\u6cd5\u65f6\uff0c\u7f16\u8bd1\u5668\u4f1a\u5bf9\u8fd4\u56de\u503c\u8fdb\u884c\u7c7b\u578b\u63a8\u5230\uff0c\u4ee5\u9002\u5e94\u63a5\u6536\u8005\u7684\u7c7b\u578b<\/p>\n\n<h2 id=\"28\u5229\u7528\u6709\u9650\u901a\u914d\u7b26\u6765\u63d0\u5347api\u7684\u7075\u6d3b\u6027\"><code class=\"language-plaintext highlighter-rouge\">28<\/code>.\u5229\u7528\u6709\u9650\u901a\u914d\u7b26\u6765\u63d0\u5347API\u7684\u7075\u6d3b\u6027<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u6cdb\u578b\u4e2d\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">extends<\/code>\u65f6\uff0c\u6bcf\u4e2a\u7c7b\u578b\u90fd\u662f\u81ea\u8eab\u7684\u5b50\u7c7b\u578b\uff1b\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">super<\/code>\u65f6\uff0c\u6bcf\u4e2a\u7c7b\u578b\u90fd\u662f\u81ea\u8eab\u7684\u8d85\u7c7b\u578b\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u4e3a\u4e86\u83b7\u5f97\u6700\u5927\u9650\u5ea6\u7684\u7075\u6d3b\u6027\uff0c\u8981\u5728\u8868\u793a\u751f\u4ea7\u8005\u6216\u8005\u6d88\u8d39\u8005\u7684\u8f93\u5165\u53c2\u6570\u4e0a\u4f7f\u7528\u901a\u914d\u7b26\u7c7b\u578b\u3002<strong>PECS<\/strong>\uff08producer-extends\uff1bconsumer-super\uff09<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u4e0d\u8981\u7528\u901a\u914d\u7b26\u7c7b\u578b\u4f5c\u4e3a\u8fd4\u56de\u7c7b\u578b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5982\u679c\u7f16\u8bd1\u5668\u4e0d\u80fd\u63a8\u65ad\u4f60\u5e0c\u671b\u5b83\u62e5\u6709\u7684\u7c7b\u578b\uff0c\u53ef\u4ee5\u901a\u8fc7\u663e\u5f0f\u7684\u7c7b\u578b\u53c2\u6570\u6765\u6307\u5b9a\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u5982\u679c\u7c7b\u578b\u53c2\u6570\u5728\u65b9\u6cd5\u4e2d\u58f0\u660e\u4e2d\u53ea\u51fa\u73b0\u4e00\u6b21\uff0c\u53ef\u4ee5\u7528\u901a\u914d\u7b26\u53d6\u4ee3\u5b83\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u4e0d\u80fd\u628anull\u4e4b\u5916\u7684\u4efb\u4f55\u503c\u653e\u8fdbList&lt;?&gt;\u4e2d<\/p>\n\n<h2 id=\"29\u4f18\u5148\u8003\u8651\u7c7b\u578b\u5b89\u5168\u7684\u5f02\u6784\u5bb9\u5668\"><code class=\"language-plaintext highlighter-rouge\">29<\/code>.\u4f18\u5148\u8003\u8651\u7c7b\u578b\u5b89\u5168\u7684\u5f02\u6784\u5bb9\u5668<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.<code class=\"language-plaintext highlighter-rouge\">cast<\/code>\u65b9\u6cd5\u662fjava\u7684cast\u64cd\u4f5c\u7b26\u7684\u52a8\u6001\u6a21\u62df\uff0c\u5b83\u53ea\u68c0\u9a8c\u5b83\u7684\u53c2\u6570\u662f\u5426\u4e3aClass\u5bf9\u8c61\u6240\u8868\u793a\u7684\u7c7b\u578b\u7684\u5b9e\u4f8b\uff0c\u5982\u679c\u662f\uff0c\u5c31\u8fd4\u56de\u53c2\u6570\uff0c\u5426\u5219\u629b\u51faClassCastException<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u7c7b\u578b\u5b89\u5168\u7684\u5f02\u6784\u5bb9\u5668\u7684\u7f3a\u9677<\/p>\n\n<blockquote>\n  <ul>\n    <li>\n      <p>\u6076\u610f\u7684\u5ba2\u6237\u7aef\u53ef\u4ee5\u5f88\u8f7b\u677e\u7684\u7834\u574f\u7c7b\u578b\u5b89\u5168\uff0c\u53ea\u8981\u5b83\u4ee5\u539f\u751f\u6001\u7c7b\u578b\u4f7f\u7528Class\u5bf9\u8c61\uff0c\u5728\u5bb9\u5668\u7684\u6dfb\u52a0\u65b9\u6cd5\u7b2c\u4e00\u884c\u52a0\u5165\u53c2\u6570\u7684\u7c7b\u578b\u68c0\u67e5\uff08<code class=\"language-plaintext highlighter-rouge\">type.cast(obj)<\/code>\uff09\u53ef\u4ee5\u907f\u514d\u8fd9\u79cd\u95ee\u9898\u3002<\/p>\n    <\/li>\n    <li>\n      <p>\u4e0d\u53ef\u5b58\u653e\u4e0d\u53ef\u5177\u4f53\u5316\u7684\u7c7b\u578b\u6570\u636e\uff08\u5982<code class=\"language-plaintext highlighter-rouge\">List&lt;String&gt;<\/code>\uff0c\u56e0\u4e3a<code class=\"language-plaintext highlighter-rouge\">List&lt;String&gt;<\/code>\u7684\u7c7b\u578b\u4e3aList.class\uff0c\u800c<code class=\"language-plaintext highlighter-rouge\">List&lt;String&gt;.class<\/code>\u662f\u8bed\u6cd5\u9519\u8bef\uff09\uff0c\u53ea\u80fd\u4fdd\u5b58String\u6216String[]\u7b49\u53ef\u5177\u4f53\u5316\u7684\u5bf9\u8c61\u3002<\/p>\n    <\/li>\n  <\/ul>\n<\/blockquote>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5229\u7528\u6709\u9650\u5236\u7c7b\u578b\u53c2\u6570\u6216\u8005\u6709\u9650\u5236\u901a\u914d\u7b26\u6765\u9650\u5236\u53ef\u4ee5\u8868\u793a\u7684\u7c7b\u578b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.<code class=\"language-plaintext highlighter-rouge\">asSubclass(List.class)<\/code>\u65b9\u6cd5\u5c06Class\u7c7b\u7684\u7c7b\u578b\u4ee4\u724c\u5b89\u5168\u4e14\u52a8\u6001\u5730\u8f6c\u6362\u6210\u53c2\u6570\u6240\u8868\u793a\u7684\u7c7b(List)\u7684\u4e00\u4e2a\u5b50\u7c7b\u7684\u901a\u914d\u7b26\u8868\u793a\u6cd5(? extends List)\uff0c\u53c2\u6570\u5fc5\u987b\u4e3a\u8c03\u7528\u8005\u7684\u7236\u7c7b\u578b\uff0c\u5982\u679c\u6210\u529f\uff0c\u8fd4\u56de\u5b83\u7684\u53c2\u6570\uff0c\u5426\u5219\u629b\u51faClassCastExcpetion<\/p>\n\n<hr \/>\n\n<h1 id=\"\u4e94-\u679a\u4e3e\u548c\u6ce8\u89e3\"><code class=\"language-plaintext highlighter-rouge\">\u4e94<\/code> \u679a\u4e3e\u548c\u6ce8\u89e3<\/h1>\n\n<h2 id=\"30\u7528enum\u4ee3\u66ffint\u5e38\u91cf\"><code class=\"language-plaintext highlighter-rouge\">30<\/code>.\u7528enum\u4ee3\u66ffint\u5e38\u91cf<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u56e0\u4e3a\u6ca1\u6709\u53ef\u4ee5\u8bbf\u95ee\u7684\u6784\u9020\u5668\uff0c\u679a\u4e3e\u7c7b\u578b\u662f\u771f\u6b63\u7684<code class=\"language-plaintext highlighter-rouge\">final<\/code>\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u679a\u4e3e\u7c7b\u578b\u5141\u8bb8\u6dfb\u52a0\u4efb\u610f\u7684\u65b9\u6cd5\u548c\u57df\uff0c\u5e76\u5b9e\u73b0\u4efb\u610f\u7684\u63a5\u53e3\u3002\u679a\u4e3e\u63d0\u4f9b\u4e86\u6240\u6709Object\u65b9\u6cd5\u7684\u9ad8\u7ea7\u5b9e\u73b0\uff0c\u5b9e\u73b0\u4e86Comparable\u548cSerializable\u63a5\u53e3\uff0c\u5e76\u9488\u5bf9\u679a\u4e3e\u7c7b\u578b\u7684\u53ef\u4efb\u610f\u6539\u53d8\u6027\u8bbe\u8ba1\u4e86\u5e8f\u5217\u5316\u65b9\u5f0f\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u679a\u4e3e\u6709\u4e00\u4e2a\u9759\u6001\u7684<code class=\"language-plaintext highlighter-rouge\">values<\/code>\u65b9\u6cd5\uff0c\u6309\u7167\u58f0\u660e\u987a\u5e8f\u8fd4\u56de\u5b83\u7684\u503c\u6570\u7ec4\uff0c<code class=\"language-plaintext highlighter-rouge\">toString<\/code>\u65b9\u6cd5\u8fd4\u56de\u6bcf\u4e2a\u679a\u4e3e\u503c\u7684\u58f0\u660e\u540d\u79f0\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5728\u540c\u4e00\u4e2a\u679a\u4e3e\u7c7b\u578b\u4e2d\uff0c\u5c06\u7279\u5b9a\u7684\u884c\u4e3a\u4e0e\u6bcf\u4e2a\u5177\u4f53\u7684\u679a\u4e3e\u5e38\u91cf\u5173\u8054\u8d77\u6765\uff1a\u5728\u679a\u4e3e\u7c7b\u578b\u4e2d\u58f0\u660e\u4e00\u4e2a\u62bd\u8c61\u7684\u65b9\u6cd5\uff0c\u5e76<strong>\u5728\u7279\u5b9a\u4e8e\u5e38\u91cf\u7684\u7c7b\u4e3b\u4f53\u4e2d\uff0c\u8986\u76d6\u8be5\u65b9\u6cd5<\/strong>\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u6bcf\u4e00\u4e2a\u679a\u4e3e\u5e38\u91cf\u53ef\u4ee5\u5173\u8054\u7279\u5b9a\u7684\u6570\u636e\uff08\u5728\u6784\u9020\u5668\u4e2d\u7ed1\u5b9a\uff09\uff0c\u56e0\u6b64\u7279\u5b9a\u4e8e\u679a\u4e3e\u5e38\u91cf\u7684\u65b9\u6cd5\u53ef\u4ee5\u4e0e\u7279\u5b9a\u4e8e\u679a\u4e3e\u5e38\u91cf\u7684\u6570\u636e\u7ed3\u5408\u8d77\u6765\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u679a\u4e3e\u7c7b\u578b\u6709\u4e00\u4e2a\u81ea\u52a8\u4ea7\u751f\u7684valueOf(string)\u65b9\u6cd5\uff0c\u5b83\u5c06\u5e38\u91cf\u7684\u540d\u5b57\u8f6c\u53d8\u6210\u5e38\u91cf\u672c\u8eab\u3002\u5982\u679c\u679a\u4e3e\u7c7b\u578b\u4e2d\u8986\u76d6toString\uff0c\u8981\u8003\u8651\u7f16\u5199\u4e00\u4e2a<code class=\"language-plaintext highlighter-rouge\">fromString<\/code>\u65b9\u6cd5\uff0c\u5c06\u5b9a\u5236\u7684\u5b57\u7b26\u4e32\u8868\u793a\u6cd5\u53d8\u56de\u76f8\u5e94\u7684\u679a\u4e3e\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">7<\/code>.\u5982\u679c\u591a\u4e2a\u679a\u4e3e\u5e38\u91cf\u540c\u65f6\u5171\u4eab\u591a\u4e2a\u884c\u4e3a\uff0c\u8981\u8003\u8651<code class=\"language-plaintext highlighter-rouge\">\u7b56\u7565\u679a\u4e3e<\/code>\u3002<\/p>\n\n<h2 id=\"31\u7528\u5b9e\u4f8b\u57df\u4ee3\u66ff\u5e8f\u6570\"><code class=\"language-plaintext highlighter-rouge\">31<\/code>.\u7528\u5b9e\u4f8b\u57df\u4ee3\u66ff\u5e8f\u6570<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u6240\u6709\u679a\u4e3e\u90fd\u6709\u4e00\u4e2a<code class=\"language-plaintext highlighter-rouge\">ordinal<\/code>\u65b9\u6cd5\uff0c\u5b83\u8fd4\u56de\u6bcf\u4e2a\u679a\u4e3e\u5e38\u91cf\u5728\u7c7b\u578b\u4e2d\u7684\u6570\u5b57\u4f4d\u7f6e<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u6c38\u8fdc\u4e0d\u8981\u6839\u636e\u679a\u4e3e\u7684\u5e8f\u6570\u5bfc\u51fa\u4e0e\u4ed6\u5173\u8054\u7684\u503c\uff0c\u800c\u662f\u8981\u5c06\u503c\u4fdd\u5b58\u5728\u4e00\u4e2a\u5b9e\u4f8b\u57df\u4e2d\u3002<\/p>\n\n<h2 id=\"32\u7528enumset\u4ee3\u66ff\u4f4d\u57df\"><code class=\"language-plaintext highlighter-rouge\">32<\/code>.\u7528EnumSet\u4ee3\u66ff\u4f4d\u57df<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.<code class=\"language-plaintext highlighter-rouge\">or<\/code>\u4f4d\u8fd0\u7b97\u5c06\u51e0\u4e2a\u5e38\u91cf\u5408\u5e76\u5230\u4e00\u4e2a\u96c6\u5408\u4e2d\uff0c\u79f0\u4e3a<code class=\"language-plaintext highlighter-rouge\">\u4f4d\u57df<\/code>\u3002\uff08\u5f62\u5982111\u2192rwx\uff09<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.EnumSet\u53ef\u4ee5\u8868\u793a\u4ece\u5355\u4e2a\u679a\u4e3e\u7c7b\u578b\u4e2d\u63d0\u53d6\u7684\u591a\u4e2a\u503c\u7684\u96c6\u5408\uff0c<code class=\"language-plaintext highlighter-rouge\">EnumSet.of<\/code><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u622a\u6b62jdk1.6\uff0c\u65e0\u6cd5\u521b\u5efa\u4e0d\u53ef\u53d8\u7684EnumSet<\/p>\n\n<h2 id=\"33\u7528enummap\u4ee3\u66ff\u5e8f\u6570\u7d22\u5f15\"><code class=\"language-plaintext highlighter-rouge\">33<\/code>.\u7528EnumMap\u4ee3\u66ff\u5e8f\u6570\u7d22\u5f15<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.<code class=\"language-plaintext highlighter-rouge\">EnumMap<\/code>\u6784\u9020\u5668\u91c7\u7528\u952e\u7c7b\u578b\u7684Class\u5bf9\u8c61\uff1a\u8fd9\u662f\u4e00\u4e2a\u6709\u9650\u5236\u7684\u7c7b\u578b\u4ee4\u724c\uff0c\u5b83\u63d0\u4f9b\u4e86\u8fd0\u884c\u65f6\u7684\u6cdb\u578b\u4fe1\u606f\u3002\u5b9e\u4f8b\u5316\u9700\u8981\u6307\u5b9aClass\u7c7b\u578b\uff0c\u53ef\u4ee5\u4fdd\u5b58\u540c\u4e00\u4e2a\u7c7b\u578b\u7684\u5bf9\u8c61\u4e0e\u503c\u7684\u6620\u5c04\u5173\u7cfb<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u6700\u597d\u4e0d\u8981\u7528\u5e8f\u6570\u6765\u7d22\u5f15\u6570\u7ec4\uff0c\u800c\u8981\u7528EnumMap\uff0c\u5982\u679c\u9700\u8981\u8868\u793a\u7684\u5173\u7cfb\u662f\u591a\u7ef4\u7684\uff0c\u5c31\u7528\u5d4c\u5957\u7684EnumMap<\/p>\n\n<h2 id=\"34\u7528\u63a5\u53e3\u6a21\u62df\u53ef\u4f38\u7f29\u7684\u679a\u4e3e\"><code class=\"language-plaintext highlighter-rouge\">34<\/code>.\u7528\u63a5\u53e3\u6a21\u62df\u53ef\u4f38\u7f29\u7684\u679a\u4e3e<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u7528\u63a5\u53e3\u6a21\u62df\u53ef\u4f38\u7f29\u7684\u679a\u4e3e\u6709\u4e2a\u5c0f\u5c0f\u7684\u4e0d\u8db3\uff0c\u5373\u65e0\u6cd5\u5b9e\u73b0\u4ece\u4e00\u4e2a\u679a\u4e3e\u7c7b\u578b\u7ee7\u627f\u5230\u53e6\u4e00\u4e2a\u679a\u4e3e\u7c7b\u578b\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u867d\u7136\u65e0\u6cd5\u7f16\u5199\u53ef\u6269\u5c55\u7684\u679a\u4e3e\u7c7b\u578b\uff0c\u5374\u53ef\u4ee5\u901a\u8fc7\u7f16\u5199\u63a5\u53e3\u4ee5\u53ca\u5b9e\u73b0\u8be5\u63a5\u53e3\u7684\u57fa\u7840\u679a\u4e3e\u7c7b\u578b\uff0c\u6a21\u62df\u53ef\u4f38\u7f29\u7684\u679a\u4e3e\u3002<code class=\"language-plaintext highlighter-rouge\">&lt;T extends Enum&lt;T&gt; &amp; interfaceType&gt;<\/code><\/p>\n\n<h2 id=\"35\u6ce8\u89e3\u4f18\u5148\u4e8e\u547d\u540d\u6a21\u5f0f\"><code class=\"language-plaintext highlighter-rouge\">35<\/code>.\u6ce8\u89e3\u4f18\u5148\u4e8e\u547d\u540d\u6a21\u5f0f<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u6ce8\u89e3\u7684\u58f0\u660e\u7c7b\u578b\u5c31\u662f\u81ea\u8eab\u901a\u8fc7<code class=\"language-plaintext highlighter-rouge\">Retention<\/code>\u548c<code class=\"language-plaintext highlighter-rouge\">Target<\/code> \u6ce8\u89e3\u8fdb\u884c\u6ce8\u89e3\uff0c<code class=\"language-plaintext highlighter-rouge\">@Retention(RetentionPolicy.RUNTIME)<\/code>\u5143\u6ce8\u89e3\u8868\u660e\uff0c\u5e94\u8be5\u5728\u8fd0\u884c\u65f6\u4fdd\u7559\uff1b<code class=\"language-plaintext highlighter-rouge\">@Target(ElementType.METHOD)<\/code>\u5143\u6ce8\u89e3\u8868\u660e\uff0c\u53ea\u6709\u5728\u65b9\u6cd5\u58f0\u660e\u4e2d\u624d\u662f\u5408\u6cd5\u7684\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.<code class=\"language-plaintext highlighter-rouge\">InvocationTargetException<\/code> \u5c01\u88c5\u4e86\u76ee\u6807\u65b9\u6cd5\u5728\u8fd0\u884c\u65f6\u4ea7\u751f\u7684\u5f02\u5e38\uff0c\u51fa\u73b0\u8be5\u5f02\u5e38\u8868\u660e\u76ee\u6807\u65b9\u6cd5\u786e\u5b9e\u88ab\u8fd0\u884c\u4e86\uff0c\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">getCause()<\/code>\u53ef\u4ee5\u83b7\u5f97\u65b9\u6cd5\u8fd0\u884c\u65f6\u4ea7\u751f\u7684\u5177\u4f53\u5f02\u5e38\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u7528\u82b1\u62ec\u53f7\u5305\u88f9\u7528\u9017\u53f7\u5206\u9694\u7684\u53c2\u6570\u5c06\u81ea\u52a8\u53d8\u6210\u53c2\u6570\u6570\u7ec4<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5982\u679c\u7f16\u5199\u7684\u5de5\u5177\u9700\u8981\u5728\u6e90\u6587\u4ef6\u4e0a\u6dfb\u52a0\u4fe1\u606f\uff0c\u5c31\u8981\u5b9a\u4e49\u4e00\u7ec4\u9002\u5f53\u7684\u6ce8\u89e3\u7c7b\u578b\u3002<\/p>\n\n<h2 id=\"36\u575a\u6301\u4f7f\u7528override\u6ce8\u89e3\"><code class=\"language-plaintext highlighter-rouge\">36<\/code>.\u575a\u6301\u4f7f\u7528Override\u6ce8\u89e3<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.<code class=\"language-plaintext highlighter-rouge\">Override<\/code>\u4f1a\u5bf9\u6807\u8bb0\u7684\u65b9\u6cd5\u8fdb\u884c\u4ee3\u7801\u68c0\u67e5\uff0c\u786e\u4fdd\u8be5\u65b9\u6cd5\u6210\u529f\u5730\u88ab\u91cd\u5199\u4e86\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u73b0\u4ee3IDE\u5728\u68c0\u6d4b\u5230Override\u6ce8\u89e3\u65f6\u4f1a\u63d0\u9192\u7528\u6237\u5c0f\u5fc3\u65e0\u610f\u8bc6\u7684\u8986\u76d6\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5728\u62bd\u8c61\u7c7b\u6216\u63a5\u53e3\u4e2d\u4f7f\u7528Override\u53ef\u4ee5\u786e\u4fdd\u4e0d\u4f1a\u6dfb\u52a0\u65b0\u7684\u65b9\u6cd5\u3002<\/p>\n\n<h2 id=\"37\u7528\u6807\u8bb0\u63a5\u53e3\u5b9a\u4e49\u7c7b\u578b\"><code class=\"language-plaintext highlighter-rouge\">37<\/code>.\u7528\u6807\u8bb0\u63a5\u53e3\u5b9a\u4e49\u7c7b\u578b<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u6807\u8bb0\u63a5\u53e3\u662f\u6ca1\u6709\u5305\u542b\u65b9\u6cd5\u58f0\u660e\u7684\u63a5\u53e3\uff0c\u53ea\u662f\u6307\u660e\u4e86\u5b9e\u73b0\u7c7b\u5e94\u8be5\u5177\u6709\u7684\u5c5e\u6027\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u6807\u8bb0\u63a5\u53e3\u6709\u4e24\u70b9\u80dc\u8fc7\u6ce8\u89e3<\/p>\n\n<blockquote>\n  <ul>\n    <li>\n      <p>\u6807\u8bb0\u63a5\u53e3\u53ef\u4ee5\u5728\u7f16\u8bd1\u65f6\u8fdb\u884c\u7c7b\u578b\u68c0\u67e5\uff0c\u4fdd\u8bc1\u53c2\u6570\u7684\u6709\u6548\u6027<\/p>\n    <\/li>\n    <li>\n      <p>\u6807\u8bb0\u63a5\u53e3\u7c7b\u578b\u66f4\u5bb9\u6613\u6307\u5b9a\u5b9e\u73b0\u7c7b\u7684\u7ea6\u675f\u6761\u4ef6\uff0c\u5982Set\u5c31\u662f\u4e00\u4e2a\u6807\u8bb0\u63a5\u53e3\uff0c\u4ed6\u9650\u5236\u4e86\u5b9e\u73b0\u7c7b\u5fc5\u987b\u5177\u6709Collection\u7279\u6027\u3002<\/p>\n    <\/li>\n  <\/ul>\n<\/blockquote>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u6ce8\u89e3\u6709\u4e24\u70b9\u80dc\u8fc7\u6807\u8bb0\u63a5\u53e3<\/p>\n\n<blockquote>\n  <ul>\n    <li>\n      <p>\u6ce8\u89e3\u53ef\u4ee5\u5728\u5185\u90e8\u4e30\u5bcc\u4fe1\u606f\u800c\u4e0d\u5f71\u54cd\u5ba2\u6237\u7aef\u4f7f\u7528<\/p>\n    <\/li>\n    <li>\n      <p>\u6807\u8bb0\u6ce8\u89e3\u5728\u652f\u6301\u6ce8\u89e3\u7684\u6846\u67b6\u4e2d\u5177\u6709\u4e00\u81f4\u6027<\/p>\n    <\/li>\n  <\/ul>\n<\/blockquote>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5982\u679c\u6807\u8bb0\u9700\u8981\u5e94\u7528\u5230\u4efb\u4f55\u7a0b\u5e8f\u5143\u7d20\u800c\u4e0d\u4ec5\u4ec5\u662f\u7c7b\u6216\u63a5\u53e3\u4e0a\uff0c\u5c31\u5e94\u8be5\u4f7f\u7528\u6ce8\u89e3\uff1b\u5426\u5219\u5e94\u8be5\u4f7f\u7528\u6807\u8bb0\u63a5\u53e3\uff1b\u5982\u679c\u8be5\u6807\u8bb0\u53ea\u7528\u4e8e\u7279\u5b9a\u7684\u63a5\u53e3\uff0c\u6700\u597d\u5c06\u6807\u8bb0\u5b9a\u4e49\u6210\u8be5\u63a5\u53e3\u7684\u5b50\u63a5\u53e3(Set\u4e0eCollection)<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u5982\u679c\u4e00\u4e2a\u6807\u8bb0\u6c38\u8fdc\u4e0d\u4f1a\u6269\u5c55\uff0c\u5e94\u8be5\u5b9a\u4e49\u6210\u6807\u8bb0\u63a5\u53e3\uff1b\u5982\u679c\u672a\u6765\u53ef\u80fd\u9700\u8981\u5728\u6807\u8bb0\u4e0a\u6dfb\u52a0\u66f4\u591a\u4fe1\u606f\uff0c\u5219\u5e94\u8be5\u5b9a\u4e49\u6210\u6807\u8bb0\u6ce8\u89e3\u3002<\/p>\n\n<hr \/>\n\n<h1 id=\"\u516d-\u65b9\u6cd5\"><code class=\"language-plaintext highlighter-rouge\">\u516d<\/code> \u65b9\u6cd5<\/h1>\n\n<h2 id=\"38\u68c0\u67e5\u53c2\u6570\u7684\u6709\u6548\u6027\"><code class=\"language-plaintext highlighter-rouge\">38<\/code>.\u68c0\u67e5\u53c2\u6570\u7684\u6709\u6548\u6027<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5e94\u8be5\u5728\u53d1\u751f\u9519\u8bef\u540e\uff0c\u80fd\u591f\u5c3d\u5feb\u68c0\u6d4b\u51fa\u9519\u8bef\uff0c\u4e0d\u8981\u8ba9\u9519\u8bef\u5728\u8fc7\u6df1\u7684\u5730\u65b9\u7206\u53d1\u51fa\u6765\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5bf9\u4e8e\u516c\u6709\u7684\u65b9\u6cd5\uff0c\u8981\u7528<code class=\"language-plaintext highlighter-rouge\">@throws<\/code>\u6807\u7b7e\u5728\u6587\u6863\u4e2d\u8bf4\u660e\u8fdd\u53cd\u53c2\u6570\u503c\u9650\u5236\u65f6\u4f1a\u629b\u51fa\u7684\u5f02\u5e38\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u975e\u516c\u6709\u7684\u65b9\u6cd5\u901a\u5e38\u5e94\u8be5\u4f7f\u7528\u65ad\u8a00\u6765\u68c0\u67e5\u53c2\u6570\uff0c <code class=\"language-plaintext highlighter-rouge\">-ea<\/code>\u542f\u7528<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5982\u679c\u6709\u6548\u6027\u68c0\u67e5\u975e\u5e38\u6602\u8d35\uff0c\u6216\u8005\u5df2\u7ecf\u9690\u542b\u5728\u8ba1\u7b97\u4e2d\u5b8c\u6210\u5219\u65e0\u9700\u8fdb\u884c\u68c0\u67e5<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">\u5f02\u5e38\u8f6c\u8bd1<\/code>\u6280\u672f\uff0c\u5c06\u8ba1\u7b97\u8fc7\u7a0b\u4e2d\u629b\u51fa\u7684\u5f02\u5e38\u8f6c\u6362\u4e3a\u6b63\u786e\u7684\u5f02\u5e38\u3002<\/p>\n\n<h2 id=\"39\u5fc5\u8981\u65f6\u8fdb\u884c\u4fdd\u62a4\u6027\u62f7\u8d1d\"><code class=\"language-plaintext highlighter-rouge\">39<\/code>.\u5fc5\u8981\u65f6\u8fdb\u884c\u4fdd\u62a4\u6027\u62f7\u8d1d<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5bf9\u6784\u9020\u5668\u7684\u6bcf\u4e2a\u53ef\u53d8\u53c2\u6570\u8fdb\u884c\u4fdd\u62a4\u6027\u62f7\u8d1d<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u4fdd\u62a4\u6027\u62f7\u8d1d\u662f\u5728\u68c0\u67e5\u53c2\u6570\u7684\u6709\u6548\u6027\u4e4b<code class=\"language-plaintext highlighter-rouge\">\u524d<\/code>\u8fdb\u884c\u7684\uff0c\u5e76\u4e14\u6709\u6548\u6027\u68c0\u67e5\u662f\u9488\u5bf9\u62f7\u8d1d\u4e4b<code class=\"language-plaintext highlighter-rouge\">\u540e<\/code>\u7684\u5bf9\u8c61\uff0c\u800c\u4e0d\u662f\u9488\u5bf9\u539f\u59cb\u5bf9\u8c61\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u62f7\u8d1d\u9636\u6bb5\u4ece\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u6539\u53d8\u7c7b\u7684\u53c2\u6570\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5bf9\u4e8e\u53c2\u6570\u7c7b\u578b\u53ef\u4ee5\u88ab\u4e0d\u4fe1\u4efb\u65b9\u5b50\u7c7b\u5316\u7684\u53c2\u6570\uff0c\u4e0d\u8981\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">clone<\/code>\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5982\u679c\u9700\u8981\u8bbf\u95ee\u7c7b\u7684\u5185\u90e8\u57df\uff0c\u8fd4\u56de\u5185\u90e8\u57df\u7684\u4fdd\u62a4\u6027\u62f7\u8d1d\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u5982\u679c\u4e0d\u80fd\u5bb9\u5fcd\u5ba2\u6237\u7aef\u4f20\u5165\u7684\u5bf9\u8c61\u53ef\u53d8\uff0c\u4f7f\u7528\u4fdd\u62a4\u6027\u62f7\u8d1d<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u957f\u5ea6\u975e0\u7684\u6570\u7ec4\u603b\u662f\u53ef\u53d8\u7684\uff0c\u4f7f\u7528\u4fdd\u62a4\u6027\u62f7\u8d1d\u6216\u8005\u8fd4\u56de\u6570\u7ec4\u7684\u4e0d\u53ef\u53d8\u89c6\u56fe<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">7<\/code>.\u901a\u5e38\u4f7f\u7528Date.getTime()\u8fd4\u56de\u7684long\u7c7b\u578b\u4f5c\u4e3a\u5185\u90e8\u7684\u65f6\u95f4\u8868\u793a\u6cd5\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">8<\/code>.\u5305\u88c5\u7c7b\u4e00\u822c\u5ba2\u6237\u7aef\u81ea\u5df1\u4f7f\u7528\uff0c\u65e0\u9700\u4f7f\u7528\u4fdd\u62a4\u6027\u62f7\u8d1d\u3002<\/p>\n\n<h2 id=\"40\u8c28\u614e\u8bbe\u8ba1\u65b9\u6cd5\u7b7e\u540d\"><code class=\"language-plaintext highlighter-rouge\">40<\/code>.\u8c28\u614e\u8bbe\u8ba1\u65b9\u6cd5\u7b7e\u540d<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u8c28\u614e\u5730\u9009\u62e9\u65b9\u6cd5\u7684\u540d\u79f0<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u4e0d\u8981\u8fc7\u4e8e\u8ffd\u6c42\u63d0\u4f9b\u4fbf\u5229\u7684\u65b9\u6cd5\uff0c\u53ea\u7528\u67d0\u9879\u64cd\u4f5c\u88ab\u7ecf\u5e38\u7528\u5230\u65f6\uff0c\u624d\u63d0\u4f9b\u5feb\u6377\u65b9\u5f0f\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u907f\u514d\u8fc7\u957f\u7684\u53c2\u6570\u5217\u8868\uff0c\u76f8\u540c\u7c7b\u578b\u7684\u957f\u53c2\u6570\u5e8f\u5217\u683c\u5916\u6709\u5bb3\u3002<\/p>\n\n<p>\u7f29\u77ed\u53c2\u6570\u5217\u8868\u7684\u4e09\u79cd\u65b9\u6cd5<\/p>\n\n<blockquote>\n  <ul>\n    <li>\n      <p>\u628a\u65b9\u6cd5\u5206\u89e3\u6210\u591a\u4e2a\u65b9\u6cd5\uff0c\u4f46\u662f\u4f1a\u5bfc\u81f4\u65b9\u6cd5\u8fc7\u591a\uff0c\u4f46\u662f\u63d0\u5347\u65b9\u6cd5\u7684\u6b63\u4ea4\u6027\uff0c\u53ef\u4ee5\u51cf\u5c11\u65b9\u6cd5\u6570\u76ee\u3002<\/p>\n    <\/li>\n    <li>\n      <p>\u521b\u5efa\u8f85\u52a9\u7c7b\uff0c\u7528\u6765\u4fdd\u5b58\u53c2\u6570\u7684\u5206\u7ec4\u3002<\/p>\n    <\/li>\n    <li>\n      <p>\u4ece\u5bf9\u8c61\u6784\u5efa\u5230\u65b9\u6cd5\u8c03\u7528\u90fd\u91c7\u7528<code class=\"language-plaintext highlighter-rouge\">Builder<\/code>\u6a21\u5f0f<\/p>\n    <\/li>\n  <\/ul>\n<\/blockquote>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5bf9\u4e8e\u53c2\u6570\u7c7b\u578b\uff0c\u4f18\u5148\u4f7f\u7528\u63a5\u53e3\u800c\u4e0d\u662f\u7c7b\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u5bf9\u4e8eboolean\u53c2\u6570\uff0c\u8981\u4f18\u5148\u4f7f\u7528\u8fde\u4e2a\u5143\u7d20\u7684\u679a\u4e3e\u7c7b\u578b\u3002<\/p>\n\n<h2 id=\"41\u614e\u7528\u91cd\u8f7d\"><code class=\"language-plaintext highlighter-rouge\">41<\/code>.\u614e\u7528\u91cd\u8f7d<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u8981\u8c03\u7528\u54ea\u4e2a\u91cd\u8f7d\u65b9\u6cd5\u662f\u5728<code class=\"language-plaintext highlighter-rouge\">\u7f16\u8bd1<\/code>\u65f6\u505a\u51fa\u51b3\u5b9a\u7684\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5bf9\u4e8e\u91cd\u8f7d\u65b9\u6cd5\u7684\u9009\u62e9\u662f<code class=\"language-plaintext highlighter-rouge\">\u9759\u6001<\/code>\u7684\uff0c\u800c\u5bf9\u4e8e\u88ab\u8986\u76d6\u7684\u65b9\u6cd5\u7684\u9009\u62e9\u662f<code class=\"language-plaintext highlighter-rouge\">\u52a8\u6001<\/code>\u7684\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5982\u679c\u666e\u901a\u7528\u6237\u6839\u672c\u4e0d\u77e5\u9053\u201d\u5bf9\u4e8e\u4e00\u7ec4\u7ed9\u5b9a\u7684\u53c2\u6570\uff0c\u5176\u4e2d\u54ea\u4e2a\u91cd\u8f7d\u65b9\u6cd5\u5c06\u4f1a\u8c03\u7528\u201d\uff0c\u90a3\u4e48\u8fd9\u6837\u7684API\u5f88\u53ef\u80fd\u5bfc\u81f4\u9519\u8bef\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5b89\u5168\u800c\u4fdd\u5b88\u7684\u7b56\u7565\u662f\uff0c\u6c38\u8fdc\u4e0d\u8981\u5bfc\u51fa\u4e24\u4e2a\u5177\u6709\u76f8\u540c\u53c2\u6570\u6570\u76ee\u7684\u91cd\u8f7d\u65b9\u6cd5\uff1b\u5982\u679c\u65b9\u6cd5\u4f7f\u7528\u53ef\u53d8\u53c2\u6570\uff0c\u4fdd\u5b88\u7684\u7b56\u7565\u662f\u6839\u672c\u4e0d\u91cd\u8f7d\u5b83\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u4e00\u4e2a\u7c7b\u7684\u591a\u4e2a\u6784\u9020\u5668\u603b\u662f\u91cd\u8f7d\u7684\uff0c\u5f88\u591a\u60c5\u51b5\u4e0b\u53ef\u4ee5\u7528\u9759\u6001\u5de5\u5382\u4ee3\u66ff\u6784\u9020\u5668\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u5bf9\u4e8e\u4e00\u5bf9\u91cd\u8f7d\u65b9\u6cd5\uff0c\u5982\u679c\u81f3\u5c11\u6709\u4e00\u4e2a\u5bf9\u5e94\u7684\u53c2\u6570\u5728\u4e24\u4e2a\u65b9\u6cd5\u4e2d\u5177\u6709\u201d<strong>\u6839\u672c\u4e0d\u540c<\/strong>\uff08\u65e0\u6cd5\u5f3a\u8f6c\uff09\u201d\u7684\u7c7b\u578b\uff0c\u90a3\u5c31\u4e0d\u4f1a\u8ba9\u7528\u6237\u611f\u5230\u6df7\u6dc6\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">7<\/code>.\u5c06<code class=\"language-plaintext highlighter-rouge\">list.remove()<\/code>\u53c2\u6570\u8f6c\u6362\u6210<code class=\"language-plaintext highlighter-rouge\">Integer<\/code>\uff0c\u8feb\u4f7f\u9009\u62e9\u6b63\u786e\u7684\u91cd\u8f7d\u65b9\u6cd5\u3002<strong>java\u8bed\u8a00\u6dfb\u52a0\u4e86\u81ea\u52a8\u88c5\u7bb1\u540e\uff0c\u7834\u574f\u4e86List\u63a5\u53e3<\/strong>\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">8<\/code>.\u5f53\u4f20\u9012\u7684\u53c2\u6570\u6ca1\u6709\u672c\u8d28\u7684\u4e0d\u540c\u65f6\uff0c\u5fc5\u987b\u786e\u4fdd\u6240\u6709\u7684\u91cd\u8f7d\u65b9\u6cd5\u884c\u4e3a\u4e00\u81f4\uff0c\u505a\u6cd5\u662f\u8ba9\u66f4\u5177\u4f53\u5316\u7684\u91cd\u8f7d\u65b9\u6cd5\u628a\u8c03\u7528\u8f6c\u53d1\u7ed9\u66f4\u4e00\u822c\u5316\u7684\u91cd\u8f7d\u65b9\u6cd5\u3002<\/p>\n\n<h2 id=\"42\u614e\u7528\u53ef\u53d8\u53c2\u6570\"><code class=\"language-plaintext highlighter-rouge\">42<\/code>.\u614e\u7528\u53ef\u53d8\u53c2\u6570<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u53c2\u6570\u6570\u91cf\u68c0\u6d4b\u65e0\u6cd5\u5728\u7f16\u8bd1\u671f\u5b8c\u6210<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u53ef\u53d8\u53c2\u6570\u65b9\u6cd5\u4f1a\u5c06\u591a\u4e2a\u53c2\u6570\u6536\u96c6\u6210<strong>\u6570\u7ec4<\/strong>\uff0c\u4f46\u82e5\u53c2\u6570\u672c\u8eab\u5c31\u662f\u6570\u7ec4\uff0c\u90a3\u4e48\u6536\u96c6\u540e\u7684\u6570\u7ec4\u5c06\u65e0\u6cd5\u5f97\u5230\u9884\u671f\u7684\u7ed3\u679c\uff08<code class=\"language-plaintext highlighter-rouge\">Arrays.asList<\/code>\uff09<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u4e0d\u5fc5\u6539\u9020\u5177\u6709\u6570\u7ec4\u53c2\u6570\u7684\u6bcf\u4e2a\u65b9\u6cd5\uff1b\u53ea\u5f53\u786e\u5b9e\u662f\u5728\u6570\u91cf\u4e0d\u5b9a\u7684\u503c\u4e0a\u6267\u884c\u8c03\u7528\u65f6\u624d\u4f7f\u7528\u53ef\u53d8\u53c2\u6570<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u91cd\u89c6\u6027\u80fd\u65f6\u8981\u5c0f\u5fc3\uff0c\u53ef\u53d8\u53c2\u6570\u65b9\u6cd5\u6bcf\u6b21\u8c03\u7528\u90fd\u4f1a\u8fdb\u884c\u6570\u7ec4\u5206\u914d\u548c\u521d\u59cb\u5316<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u63d0\u4f9b\u5927\u591a\u6570\u4f7f\u7528\u60c5\u51b5\u4e0b\u7684\u4e0d\u53ef\u53d8\u53c2\u6570\u65b9\u6cd5\uff0c\u518d\u989d\u5916\u9644\u52a0\u53ef\u53d8\u53c2\u6570\u65b9\u6cd5\uff08<code class=\"language-plaintext highlighter-rouge\">EnumSet.of<\/code>\uff09<\/p>\n\n<h2 id=\"43\u8fd4\u56de\u96f6\u957f\u5ea6\u7684\u6570\u7ec4\u6216\u8005\u96c6\u5408\u800c\u4e0d\u662fnull\"><code class=\"language-plaintext highlighter-rouge\">43<\/code>.\u8fd4\u56de\u96f6\u957f\u5ea6\u7684\u6570\u7ec4\u6216\u8005\u96c6\u5408\uff0c\u800c\u4e0d\u662fnull<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5982\u679c\u8fd4\u56denull\uff0c\u6bcf\u6b21\u8c03\u7528\u8be5\u65b9\u6cd5\u65f6\u90fd\u4f1a\u9700\u8981\u8fdb\u884c\u7a7a\u503c\u5224\u65ad<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u957f\u5ea6\u4e3a0\u7684\u6570\u7ec4\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u56e0\u6b64\u8fd4\u56de\u7684\u7a7a\u6570\u7ec4\u53ef\u4ee5\u81ea\u7531\u5171\u4eab<\/p>\n\n<p>\uff08<code class=\"language-plaintext highlighter-rouge\">Collections.emptySet<\/code>\uff1b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">Collections.emptyList<\/code>\uff1b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">Collections.emptyMap<\/code>\uff09<\/p>\n\n<h2 id=\"44\u4e3a\u6240\u6709\u5bfc\u51fa\u7684api\u5143\u7d20\u7f16\u5199\u6587\u6863\u6ce8\u91ca\"><code class=\"language-plaintext highlighter-rouge\">44<\/code>.\u4e3a\u6240\u6709\u5bfc\u51fa\u7684API\u5143\u7d20\u7f16\u5199\u6587\u6863\u6ce8\u91ca<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u6587\u6863\u6ce8\u91ca\u5e94\u8be5\u7b80\u6d01\u5730\u63cf\u8ff0\u51fa\u5b83\u548c\u5ba2\u6237\u7aef\u4e4b\u95f4\u7684\u7ea6\u5b9a<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5e94\u8be5\u5217\u4e3e\u51fa\u8fd9\u4e2a\u65b9\u6cd5\u7684\u6240\u6709\u524d\u63d0\u6761\u4ef6\uff0c\u540e\u7f6e\u6761\u4ef6\u548c\u526f\u4f5c\u7528<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.<code class=\"language-plaintext highlighter-rouge\">{@code}<\/code>\u4f1a\u9020\u6210\u5305\u88f9\u7684\u5185\u5bb9\u4ee5\u4ee3\u7801\u7247\u6bb5\u5f62\u5f0f\u5448\u73b0\uff08\u5373\u751f\u6210code\u6807\u7b7e\uff09<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.<code class=\"language-plaintext highlighter-rouge\">{@literal}<\/code>\u4f1a\u81ea\u52a8\u8f6c\u4e49\u5305\u88f9\u7684\u5185\u5bb9<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u540c\u4e00\u4e2a\u7c7b\u6216\u8005\u63a5\u53e3\u4e2d\u7684\u4e24\u4e2a\u6210\u5458\u6216\u8005\u6784\u9020\u5668\uff0c\u4e0d\u5e94\u8be5\u5177\u6709\u76f8\u540c\u7684\u6982\u8981\u63cf\u8ff0<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u4e0d\u8981\u5ffd\u89c6\u7c7b\u662f\u5426\u662f<strong>\u7ebf\u7a0b\u5b89\u5168<\/strong>\u7684\uff0c\u4ee5\u53ca\u7c7b\u662f\u5426\u662f<strong>\u53ef\u5e8f\u5217\u5316<\/strong>\u7684\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">7<\/code>.<code class=\"language-plaintext highlighter-rouge\">{@inheritDoc}<\/code>\u7ee7\u627f\u6ce8\u91ca<\/p>\n\n<hr \/>\n\n<h1 id=\"\u4e03-\u901a\u7528\u7a0b\u5e8f\u8bbe\u8ba1\"><code class=\"language-plaintext highlighter-rouge\">\u4e03<\/code> \u901a\u7528\u7a0b\u5e8f\u8bbe\u8ba1<\/h1>\n\n<h2 id=\"45\u5c06\u5c40\u90e8\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u6700\u5c0f\u5316\"><code class=\"language-plaintext highlighter-rouge\">45<\/code>.\u5c06\u5c40\u90e8\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u6700\u5c0f\u5316<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u6700\u6709\u529b\u7684\u65b9\u6cd5\u5c31\u662f\u5728\u7b2c\u4e00\u6b21\u4f7f\u7528\u5b83\u7684\u5730\u65b9\u58f0\u660e<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u51e0\u4e4e\u6bcf\u4e2a\u5c40\u90e8\u53d8\u91cf\u90fd\u5e94\u8be5\u5305\u542b\u4e00\u4e2a\u521d\u59cb\u5316\u8868\u8fbe\u5f0f\uff0c\u5982\u679c\u6ca1\u6709\u8db3\u591f\u7684\u4fe1\u606f\u6765\u8fdb\u884c\u6709\u610f\u4e49\u7684\u521d\u59cb\u5316\uff0c\u5c31\u63a8\u8fdf\u8fd9\u4e2a\u58f0\u660e\uff0ctry-catch\u9664\u5916\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5faa\u73af\u4e2d\u63d0\u4f9b\u4e86\u7279\u6b8a\u7684\u673a\u4f1a\u6765\u5c06\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u6700\u5c0f\u5316\uff0c\u5982\u679c\u5728\u5faa\u73af\u7ec8\u6b62\u540e\u4e0d\u518d\u9700\u8981\u5faa\u73af\u53d8\u91cf\u7684\u5185\u5bb9\uff0c<code class=\"language-plaintext highlighter-rouge\">for<\/code>\u5faa\u73af\u5c31\u4f18\u5148\u4e8e<code class=\"language-plaintext highlighter-rouge\">while<\/code>\u5faa\u73af\u3002<\/p>\n\n<h2 id=\"46for-each-\u5faa\u73af\u4f18\u5148\u4e8e\u4f20\u7edffor\u5faa\u73af\"><code class=\"language-plaintext highlighter-rouge\">46<\/code>.for-each \u5faa\u73af\u4f18\u5148\u4e8e\u4f20\u7edffor\u5faa\u73af<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5d4c\u5957\u7684for-each\u5faa\u73af\uff0c\u5916\u5c42\u5faa\u73af\u7684\u5bf9\u8c61\u53ef\u4ee5\u5728\u5185\u5c42\u5bf9\u8c61\u4e2d\u4fdd\u6301\uff0c\u4e0d\u4f1a\u968f\u5185\u5c42\u5faa\u73af\u79fb\u52a8\u6307\u9488\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u67093\u79cd\u60c5\u51b5\u65e0\u6cd5\u4f7f\u7528for-each<\/p>\n\n<blockquote>\n  <ul>\n    <li>\n      <p>\u9700\u8981\u904d\u5386\u5e76\u5220\u9664\u5143\u7d20\u65f6<\/p>\n    <\/li>\n    <li>\n      <p>\u9700\u8981\u904d\u5386\u5143\u7d20\u5e76\u53d6\u4ee3\u67d0\u4e9b\u503c\u65f6<\/p>\n    <\/li>\n    <li>\n      <p>\u9700\u8981\u5e76\u884c\u8fed\u4ee3\u591a\u4e2a\u96c6\u5408\u65f6<\/p>\n    <\/li>\n  <\/ul>\n<\/blockquote>\n\n<h2 id=\"47\u4e86\u89e3\u548c\u4f7f\u7528\u7c7b\u5e93\"><code class=\"language-plaintext highlighter-rouge\">47<\/code>.\u4e86\u89e3\u548c\u4f7f\u7528\u7c7b\u5e93<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">java.lang<\/code>\uff1b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">java.util<\/code>\uff1b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">java.io<\/code>\uff1b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">java.util.concurrent<\/code>\uff1b<\/p>\n\n<h2 id=\"48\u5982\u679c\u9700\u8981\u7cbe\u786e\u7684\u7b54\u6848\u8bf7\u907f\u514d\u4f7f\u7528float\u548cdouble\"><code class=\"language-plaintext highlighter-rouge\">48<\/code>.\u5982\u679c\u9700\u8981\u7cbe\u786e\u7684\u7b54\u6848\uff0c\u8bf7\u907f\u514d\u4f7f\u7528float\u548cdouble<\/h2>\n\n<p>\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">BigDecimal<\/code>\uff0c<code class=\"language-plaintext highlighter-rouge\">int<\/code> \u6216\u8005 <code class=\"language-plaintext highlighter-rouge\">long<\/code> \u8fdb\u884c\u8d27\u5e01\u8ba1\u7b97<\/p>\n\n<h2 id=\"49\u57fa\u672c\u7c7b\u578b\u4f18\u5148\u4e8e\u88c5\u7bb1\u57fa\u672c\u7c7b\u578b\"><code class=\"language-plaintext highlighter-rouge\">49<\/code>.\u57fa\u672c\u7c7b\u578b\u4f18\u5148\u4e8e\u88c5\u7bb1\u57fa\u672c\u7c7b\u578b<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u57fa\u672c\u7c7b\u578b\u4e0e\u88c5\u7bb1\u57fa\u672c\u7c7b\u578b\u7684\u533a\u522b<\/p>\n\n<blockquote>\n  <ul>\n    <li>\n      <p>\u57fa\u672c\u7c7b\u578b\u53ea\u6709\u503c\uff0c\u800c\u88c5\u7bb1\u57fa\u672c\u7c7b\u578b\u7684<strong>\u540c\u4e00\u6027<\/strong>\u4e0d\u4ec5\u53d6\u51b3\u4e8e\u503c<\/p>\n    <\/li>\n    <li>\n      <p>\u88c5\u7bb1\u57fa\u672c\u7c7b\u578b\u9664\u4e86\u503c\u8fd8\u591a\u4e86\u4e00\u4e2anull<\/p>\n    <\/li>\n    <li>\n      <p>\u57fa\u672c\u7c7b\u578b\u66f4\u8282\u7701\u7a7a\u95f4<\/p>\n    <\/li>\n  <\/ul>\n<\/blockquote>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5bf9\u88c5\u7bb1\u57fa\u672c\u7c7b\u578b\u4f7f\u7528==\u64cd\u4f5c\u7b26\u51e0\u4e4e\u603b\u662f\u9519\u8bef\u7684\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5f53\u4e00\u9879\u64cd\u4f5c\u4e2d\u6df7\u5408\u4f7f\u7528\u57fa\u672c\u7c7b\u578b\u548c\u88c5\u7bb1\u57fa\u672c\u7c7b\u578b\u65f6\uff0c\u88c5\u7bb1\u57fa\u672c\u7c7b\u578b\u4f1a<strong>\u81ea\u52a8\u62c6\u7bb1<\/strong>\u3002\u82e5\u88ab\u62c6\u7684\u5bf9\u8c61\u4e3anull\uff0c\u5c06\u629b\u51fa\u5f02\u5e38\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5728\u96c6\u5408\u4e2d\u53ea\u80fd\u4f7f\u7528\u88c5\u7bb1\u57fa\u672c\u7c7b\u578b<\/p>\n\n<h2 id=\"50\u5982\u679c\u5176\u4ed6\u7c7b\u578b\u66f4\u9002\u5408\u5219\u5c3d\u91cf\u907f\u514d\u4f7f\u7528\u5b57\u7b26\u4e32\"><code class=\"language-plaintext highlighter-rouge\">50<\/code>.\u5982\u679c\u5176\u4ed6\u7c7b\u578b\u66f4\u9002\u5408\uff0c\u5219\u5c3d\u91cf\u907f\u514d\u4f7f\u7528\u5b57\u7b26\u4e32<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5b57\u7b26\u4e32\u4e0d\u9002\u5408\u4ee3\u66ff\u5176\u4ed6\u7684\u503c\u7c7b\u578b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5b57\u7b26\u4e32\u4e0d\u9002\u5408\u4ee3\u66ff\u679a\u4e3e\u7c7b\u578b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5b57\u7b26\u4e32\u4e0d\u9002\u5408\u4ee3\u66ff\u805a\u96c6\u7c7b\u578b\uff08\u5373\u5c06\u591a\u4e2a\u90e8\u5206\u62fc\u63a5\u6210\u5b57\u7b26\u4e32\u7528\u5173\u952e\u5b57\u5206\u9694\uff09\uff0c\u6700\u597d\u7528\u4e00\u4e2a\u7b80\u5355\u7684\u7c7b\u6765\u4ee3\u66ff\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5b57\u7b26\u4e32\u4e0d\u53ef\u66ff\u4ee3\u63a7\u5236\u5171\u4eab\u8d44\u6e90\u8bbf\u95ee\u6743\u9650\u7684\u952e<\/p>\n\n<h2 id=\"51\u5f53\u5fc3\u5b57\u7b26\u4e32\u8fde\u63a5\u7684\u6027\u80fd\"><code class=\"language-plaintext highlighter-rouge\">51<\/code>.\u5f53\u5fc3\u5b57\u7b26\u4e32\u8fde\u63a5\u7684\u6027\u80fd<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u4e3a\u8fde\u63a5n\u4e2a\u5b57\u7b26\u4e32\u800c\u91cd\u590d\u5730\u4f7f\u7528\u5b57\u7b26\u4e32\u8fde\u63a5\u64cd\u4f5c\u7b26\uff0c\u9700\u8981n\u7684\u5e73\u65b9\u7ea7\u7684\u65f6\u95f4<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u4e3a\u4e86\u6027\u80fd\uff0c\u7528<code class=\"language-plaintext highlighter-rouge\">StringBuilder<\/code>\u66ff\u4ee3String<\/p>\n\n<h2 id=\"52\u901a\u8fc7\u63a5\u53e3\u5f15\u7528\u5bf9\u8c61\"><code class=\"language-plaintext highlighter-rouge\">52<\/code>.\u901a\u8fc7\u63a5\u53e3\u5f15\u7528\u5bf9\u8c61<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5982\u679c\u6709\u5408\u9002\u7684\u63a5\u53e3\u7c7b\u578b\u5b58\u5728\uff0c\u90a3\u4e48\u5bf9\u4e8e\u53c2\u6570\uff0c\u8fd4\u56de\u503c\uff0c\u53d8\u91cf\u548c\u57df\u6765\u8bf4\uff0c\u5c31\u90fd\u5e94\u8be5\u4f7f\u7528\u63a5\u53e3\u7c7b\u578b\u8fdb\u884c\u58f0\u660e<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5982\u679c\u5bf9\u8c61\u5c5e\u4e8e\u57fa\u4e8e\u7c7b\u7684\u6846\u67b6\uff0c\u5c31\u5e94\u8be5\u4f7f\u7528\u57fa\u7c7b\u5f15\u7528\u8fd9\u4e2a\u5bf9\u8c61\uff0c\u5c3d\u91cf\u7528\u62bd\u8c61\u7c7b\u578b\u5f15\u7528\u5bf9\u8c61<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5982\u679c\u7a0b\u5e8f\u4f9d\u8d56\u4e8e\u7c7b\u4e2d\u989d\u5916\u7684\u65b9\u6cd5\uff0c\u90a3\u4e48\u8fd9\u79cd\u7c7b\u5e94\u8be5\u53ea\u88ab\u7528\u6765\u5f15\u7528\u5b9e\u4f8b\uff0c\u800c\u4e0d\u5e94\u8be5\u4f5c\u4e3a\u53c2\u6570\u7c7b\u578b\u3002<\/p>\n\n<h2 id=\"53\u63a5\u53e3\u4f18\u5148\u4e8e\u53cd\u5c04\u673a\u5236\"><code class=\"language-plaintext highlighter-rouge\">53<\/code>.\u63a5\u53e3\u4f18\u5148\u4e8e\u53cd\u5c04\u673a\u5236<\/h2>\n\n<p>\u53cd\u5c04\u529f\u80fd\u5e94\u8be5\u53ea\u6709\u5728\u8bbe\u8ba1\u65f6\u88ab\u7528\u5230\uff0c\u6216\u8005\u53ea\u662f\u7528\u6765\u521b\u5efa\u5bf9\u8c61\uff0c\u7a0b\u5e8f\u5728\u8fd0\u884c\u65f6\u4e0d\u5e94\u8be5\u4ee5\u53cd\u5c04\u65b9\u5f0f\u8bbf\u95ee\u5bf9\u8c61<\/p>\n\n<h2 id=\"54\u8c28\u614e\u5730\u4f7f\u7528\u672c\u5730\u65b9\u6cd5\"><code class=\"language-plaintext highlighter-rouge\">54<\/code>.\u8c28\u614e\u5730\u4f7f\u7528\u672c\u5730\u65b9\u6cd5<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u672c\u5730\u65b9\u6cd53\u4e2a\u7528\u9014<\/p>\n\n<blockquote>\n  <ul>\n    <li>\n      <p>\u63d0\u4f9b\u8bbf\u95ee\u7279\u5b9a\u4e8e\u5e73\u53f0\u7684\u673a\u5236\u7684\u80fd\u529b\uff0c\u5982\u6ce8\u518c\u8868\u548c\u6587\u4ef6\u9501<\/p>\n    <\/li>\n    <li>\n      <p>\u63d0\u4f9b\u4e86\u8bbf\u95ee\u9057\u7559\u4ee3\u7801\u5e93\u7684\u80fd\u529b<\/p>\n    <\/li>\n    <li>\n      <p>\u901a\u8fc7\u672c\u5730\u8bed\u8a00\uff0c\u7f16\u5199\u7a0b\u5e8f\u4e2d\u6ce8\u91cd\u6027\u80fd\u7684\u90e8\u5206<\/p>\n    <\/li>\n  <\/ul>\n<\/blockquote>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u4f7f\u7528\u672c\u5730\u65b9\u6cd5<strong>\u4e0d\u503c\u5f97\u63d0\u5021<\/strong>\uff0c<code class=\"language-plaintext highlighter-rouge\">java.util.prefs<\/code>\u63d0\u4f9b\u4e86\u8bbf\u95ee\u6ce8\u518c\u8868\u7684\u80fd\u529b\uff0c<code class=\"language-plaintext highlighter-rouge\">java.awt.SystemTray<\/code>\u63d0\u4f9b\u4e86\u8bbf\u95ee\u684c\u9762\u7cfb\u7edf\u6258\u76d8\u7684\u80fd\u529b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u672c\u5730\u8bed\u8a00\u662f<code class=\"language-plaintext highlighter-rouge\">\u4e0d\u5b89\u5168<\/code>\u7684\uff0c\u65e0\u6cd5\u514d\u53d7\u5185\u5b58\u6bc1\u574f\u9519\u8bef\u7684\u5f71\u54cd\u3002<\/p>\n\n<h2 id=\"55\u8c28\u614e\u5730\u8fdb\u884c\u4f18\u5316\"><code class=\"language-plaintext highlighter-rouge\">55<\/code>.\u8c28\u614e\u5730\u8fdb\u884c\u4f18\u5316<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u597d\u7684\u7a0b\u5e8f\u4f53\u73b0\u4e86\u4fe1\u606f\u9690\u85cf\u7684\u539f\u5219\uff0c\u53ea\u8981\u6709\u53ef\u80fd\uff0c\u5c31\u8981\u628a\u8bbe\u8ba1\u51b3\u7b56\uff08\u6682\u65f6\u7406\u89e3\u4e3a\u4e1a\u52a1\u903b\u8f91\uff09\u96c6\u4e2d\u5728\u5355\u4e2a\u6a21\u5757\u4e2d\uff0c\u56e0\u6b64\uff0c\u53ef\u4ee5\u6539\u53d8\u5355\u4e2a\u51b3\u7b56\uff0c\u800c\u4e0d\u4f1a\u5f71\u54cd\u5230\u7cfb\u7edf\u7684\u5176\u4ed6\u90e8\u5206\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u52aa\u529b\u907f\u514d\u90a3\u4e9b\u9650\u5236\u6027\u80fd\u7684\u8bbe\u8ba1\u51b3\u7b56\uff0c\u7cfb\u7edf\u4e2d\u6700\u96be\u66f4\u6539\u7684\u662f\u6307\u5b9a\u6a21\u5757<strong>\u4ea4\u4e92\u5173\u7cfb<\/strong>\u7684\u7ec4\u4ef6\uff0c<strong>API<\/strong>\uff0c<strong>\u7ebf\u8def\u5c42\u534f\u8bae<\/strong>\u548c<strong>\u6c38\u4e45\u6570\u636e\u683c\u5f0f<\/strong><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u8981\u8003\u8651API\u8bbe\u8ba1\u8bbe\u8ba1\u51b3\u7b56\u7684\u6027\u80fd\u540e\u679c<\/p>\n\n<blockquote>\n  <ul>\n    <li>\n      <p>\u5982\u679c\u5c06\u516c\u7c7b\u7c7b\u578b\u6210\u4e3a\u53ef\u53d8\u7684\uff0c\u5c31\u53ef\u80fd\u5bfc\u81f4\u5927\u91cf\u4e0d\u5fc5\u8981\u7684\u4fdd\u62a4\u6027\u62f7\u8d1d<\/p>\n    <\/li>\n    <li>\n      <p>\u5728\u9002\u5408\u4f7f\u7528\u590d\u5408\u6a21\u5f0f\u7684\u516c\u6709\u7c7b\u4e2d\u4f7f\u7528\u7ee7\u627f\uff0c\u4f1a\u628a\u8fd9\u4e2a\u7c7b\u4e0e\u5b83\u7684\u8d85\u7c7b\u6c38\u8fdc\u675f\u7f1a\u5728\u4e00\u8d77<\/p>\n    <\/li>\n    <li>\n      <p>\u5728API\u4e2d\u4f7f\u7528\u5b9e\u73b0\u7c7b\u800c\u4e0d\u662f\u63a5\u53e3\uff0c\u4f1a\u5c06\u5ba2\u6237\u7aef\u675f\u7f1a\u5728\u5177\u4f53\u7684\u5b9e\u73b0\u7c7b\u4e0a\uff0c\u5982\u679c\u5c06\u6765\u51fa\u73b0\u66f4\u5feb\u7684\u5b9e\u73b0\u4e5f\u65e0\u6cd5\u4f7f\u7528\u3002<\/p>\n    <\/li>\n  <\/ul>\n<\/blockquote>\n\n<h2 id=\"56\u9075\u5b88\u666e\u904d\u63a5\u53d7\u7684\u547d\u540d\u4e60\u60ef\"><code class=\"language-plaintext highlighter-rouge\">56<\/code>.\u9075\u5b88\u666e\u904d\u63a5\u53d7\u7684\u547d\u540d\u4e60\u60ef<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u300a<code class=\"language-plaintext highlighter-rouge\">The Java Language Specification<\/code>\u300b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5bf9\u4e8e\u7f29\u5199\u5355\u8bcd\uff0c\u4e5f\u5e94\u8be5\u9075\u5b88\u9996\u5b57\u6bcd\u5927\u5199\u539f\u5219<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5e38\u91cf\u57df\u662f\u552f\u4e00\u63a8\u8350\u4f7f\u7528\u4e0b\u5212\u7ebf\u7684\u60c5\u5f62<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u7c7b\u578b\u53c2\u6570\uff0c<code class=\"language-plaintext highlighter-rouge\">T<\/code>\u4efb\u610f\u7c7b\u578b\uff0c<code class=\"language-plaintext highlighter-rouge\">E<\/code>\u96c6\u5408\u5143\u7d20\u7c7b\u578b\uff0c<code class=\"language-plaintext highlighter-rouge\">KV<\/code>\u952e\u503c\u6620\u5c04\u7c7b\u578b\uff0c<code class=\"language-plaintext highlighter-rouge\">X<\/code>\u5f02\u5e38\uff0c\u4efb\u4f55\u7c7b\u578b\u7684\u5e8f\u5217\u53ef\u4ee5\u662fT,U,V\u6216\u8005T1,T2,t3<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u8f6c\u6362\u5bf9\u8c61\u7c7b\u578b\uff0c\u8fd4\u56de\u4e0d\u540c\u7c7b\u578b\u7684\u72ec\u7acb\u5bf9\u8c61\u7684\u65b9\u6cd5 <code class=\"language-plaintext highlighter-rouge\">toType<\/code>\uff1b<\/p>\n\n<p>\u8fd4\u56de\u89c6\u56fe<code class=\"language-plaintext highlighter-rouge\">asType<\/code>\uff1b<\/p>\n\n<p>\u8fd4\u56de\u4e00\u4e2a\u4e0e\u88ab\u8c03\u7528\u5bf9\u8c61\u76f8\u540c\u503c\u7684\u57fa\u672c\u7c7b\u578b\u7684\u65b9\u6cd5<code class=\"language-plaintext highlighter-rouge\">typeValue<\/code>\uff1b<\/p>\n\n<p>\u9759\u6001\u5de5\u5382<code class=\"language-plaintext highlighter-rouge\">valueOf<\/code>\uff0c<code class=\"language-plaintext highlighter-rouge\">of<\/code>\uff0c<code class=\"language-plaintext highlighter-rouge\">getInstance<\/code>\uff0c<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">newInstance<\/code>\uff0c<code class=\"language-plaintext highlighter-rouge\">getType<\/code>\uff0c<code class=\"language-plaintext highlighter-rouge\">NewType<\/code><\/p>\n\n<hr \/>\n\n<h1 id=\"\u516b-\u5f02\u5e38\"><code class=\"language-plaintext highlighter-rouge\">\u516b<\/code> \u5f02\u5e38<\/h1>\n\n<h2 id=\"57\u53ea\u9488\u5bf9\u4e0d\u6b63\u5e38\u60c5\u51b5\u4f7f\u7528\u5f02\u5e38\"><code class=\"language-plaintext highlighter-rouge\">57<\/code>.\u53ea\u9488\u5bf9\u4e0d\u6b63\u5e38\u60c5\u51b5\u4f7f\u7528\u5f02\u5e38<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5f02\u5e38\u673a\u5236\u7684\u8bbe\u8ba1\u521d\u8877\u662f\u4e3a\u4e86\u4e0d\u6b63\u5e38\u7684\u60c5\u5f62\uff0c\u5f88\u5c11\u6709JVM\u5b9e\u73b0\u4f1a\u5bf9\u5b83\u8fdb\u884c\u4f18\u5316\uff1b\u628a\u4ee3\u7801\u653e\u5728try-catch\u4e2d\u53cd\u800c\u963b\u6b62\u4e86\u672c\u6765\u53ef\u4ee5\u8fdb\u884c\u7684\u4f18\u5316\uff1b\u5bf9\u6570\u7ec4\u8fdb\u884c\u904d\u5386\u7684\u6807\u51c6\u6a21\u5f0f\u5e76\u4f1a\u4e0d\u5bfc\u81f4\u5197\u4f59\u7684\u68c0\u67e5\uff0c\u6709\u4e9b\u73b0\u4ee3\u7684JVM\u5b9e\u73b0\u4f1a\u5c06\u5b83\u4eec\u4f18\u5316\u6389\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5f02\u5e38\u53ea\u5e94\u7528\u4e8e\u4e0d\u6b63\u5e38\u60c5\u51b5\uff0c\u4e0d\u5e94\u8be5\u7528\u4e8e\u6b63\u5e38\u7684\u63a7\u5236\u6d41\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5982\u679c\u7c7b\u5177\u6709\u72b6\u6001\uff0c\u6709\u4e24\u79cd\u65b9\u6cd5\u53ef\u4ee5\u907f\u514d\u5f02\u5e38\uff0c\u7b2c\u4e00\u79cd\u662f<code class=\"language-plaintext highlighter-rouge\">\u72b6\u6001\u6d4b\u8bd5\u6cd5<\/code>\uff0c\u5982Iteable\u63a5\u53e3\u7684hasNext\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u53e6\u4e00\u79cd\u65b9\u6cd5\u662f<code class=\"language-plaintext highlighter-rouge\">\u53ef\u8bc6\u522b\u8fd4\u56de\u503c\u6cd5<\/code>\uff0c\u5e76\u53d1\u73af\u5883\u4e0b\u6216\u72b6\u6001\u68c0\u67e5\u5f71\u54cd\u6027\u80fd\u65f6\u66f4\u9002\u7528\uff0c\u5982\u679c\u6240\u6709\u60c5\u51b5\u7b49\u540c\uff0c\u4f18\u5148\u4f7f\u7528\u72b6\u6001\u68c0\u6d4b\u6cd5\u3002<\/p>\n\n<h2 id=\"58\u5bf9\u53ef\u6062\u590d\u7684\u60c5\u51b5\u4f7f\u7528\u53d7\u68c0\u5f02\u5e38\u5bf9\u7f16\u7a0b\u9519\u8bef\u4f7f\u7528\u8fd0\u884c\u65f6\u5f02\u5e38\"><code class=\"language-plaintext highlighter-rouge\">58<\/code>.\u5bf9\u53ef\u6062\u590d\u7684\u60c5\u51b5\u4f7f\u7528\u53d7\u68c0\u5f02\u5e38\uff0c\u5bf9\u7f16\u7a0b\u9519\u8bef\u4f7f\u7528\u8fd0\u884c\u65f6\u5f02\u5e38<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u4e09\u79cd\u53ef\u629b\u51fa\u7ed3\u6784\uff1a<code class=\"language-plaintext highlighter-rouge\">\u53d7\u68c0\u5f02\u5e38<\/code>\uff0c<code class=\"language-plaintext highlighter-rouge\">\u8fd0\u884c\u65f6\u5f02\u5e38<\/code>\uff0c<code class=\"language-plaintext highlighter-rouge\">\u9519\u8bef<\/code><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5982\u679c\u671f\u671b\u8c03\u7528\u8005\u80fd\u591f\u9002\u5f53\u5730\u6062\u590d\uff0c\u4f7f\u7528\u53d7\u68c0\u7684\u5f02\u5e38<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u7528\u8fd0\u884c\u65f6\u5f02\u5e38\u8868\u660e\u7f16\u7a0b\u9519\u8bef\uff0c\u5927\u591a\u6570\u8fd0\u884c\u65f6\u5f02\u5e38\u8868\u793a\u63d0\u524d\u8fdd\u4f8b\uff0c\u5373API\u7528\u6237\u6ca1\u6709\u9075\u5b88\u7ea6\u5b9a<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u9519\u8bef\u901a\u5e38\u88abJVM\u4fdd\u7559\uff0c\u7528\u4e8e\u8868\u793a\u8d44\u6e90\u4e0d\u8db3\uff0c\u7ea6\u675f\u5931\u8d25\u7b49\uff0c\u6700\u597d\u4e0d\u8981\u518d\u5b9e\u73b0\u4efb\u4f55\u65b0\u7684Error\u5b50\u7c7b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u5982\u679c\u4e0d\u6e05\u695a\u662f\u5426\u6709\u53ef\u80fd\u6062\u590d\uff0c\u6700\u597d\u4f7f\u7528<strong>\u672a\u53d7\u68c0<\/strong>\u7684\u5f02\u5e38<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u53d7\u68c0\u7684\u5f02\u5e38\u5f80\u5f80\u9700\u8981\u8868\u660e\u53ef\u56de\u590d\u6761\u4ef6\uff0c\u63d0\u4f9b\u4e00\u4e9b\u4fbf\u4e8e\u67e5\u8be2\u4fe1\u606f\u7684\u65b9\u6cd5\u5c24\u5176\u91cd\u8981<\/p>\n\n<h2 id=\"59\u907f\u514d\u4e0d\u5fc5\u8981\u5730\u4f7f\u7528\u53d7\u68c0\u7684\u5f02\u5e38\"><code class=\"language-plaintext highlighter-rouge\">59<\/code>.\u907f\u514d\u4e0d\u5fc5\u8981\u5730\u4f7f\u7528\u53d7\u68c0\u7684\u5f02\u5e38<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5982\u679c\u6b63\u786e\u4f7f\u7528API\u4e0d\u80fd\u963b\u6b62\u5f02\u5e38\u7684\u4ea7\u751f\uff0c\u800c\u4e00\u65e6\u4ea7\u751f\u5f02\u5e38API\u4f7f\u7528\u8005\u80fd\u591f\u7acb\u5373\u91c7\u53d6\u6709\u6548\u7684\u52a8\u4f5c\uff0c\u5c31\u503c\u5f97\u4f7f\u7528\u53d7\u68c0\u7684\u5f02\u5e38\uff0c\u9664\u975e\u4e24\u4e2a\u6761\u4ef6\u90fd\u6210\u7acb\uff0c\u5426\u5219\u66f4\u9002\u5408\u4f7f\u7528<strong>\u672a\u53d7\u68c0<\/strong>\u5f02\u5e38\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u628a\u53d7\u68c0\u7684\u5f02\u5e38\u53d8\u6210\u672a\u53d7\u68c0\u5f02\u5e38\u7684\u65b9\u6cd5\u662f\u628a\u629b\u51fa\u5f02\u5e38\u7684\u65b9\u6cd5\u5206\u6210\u4e24\u4e2a\u65b9\u6cd5\uff0c\u5176\u4e2d\u4e00\u4e2a\u65b9\u6cd5\u8fd4\u56deboolean\u8868\u793a\u662f\u5426\u5e94\u8be5\u629b\u51fa\u5f02\u5e38\uff08\u7c7b\u4f3c\u72b6\u6001\u68c0\u6d4b\u6cd5\uff09\u3002\u8fd9\u79cd\u65b9\u6cd5\u5728\u5e76\u53d1\u73af\u5883\u4e0b\u6216\u8005\u5f02\u5e38\u68c0\u6d4b\u5f88\u8017\u6027\u80fd\u65f6\u5219\u4e0d\u9002\u7528\u3002<\/p>\n\n<h2 id=\"60\u4f18\u5148\u4f7f\u7528\u6807\u51c6\u7684\u5f02\u5e38\"><code class=\"language-plaintext highlighter-rouge\">60<\/code>.\u4f18\u5148\u4f7f\u7528\u6807\u51c6\u7684\u5f02\u5e38<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">ConcurrentModificationException<\/code>\uff1b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">UnsupportedOperationException<\/code><\/p>\n\n<h2 id=\"61\u629b\u51fa\u4e0e\u62bd\u8c61\u76f8\u5bf9\u5e94\u7684\u5f02\u5e38\"><code class=\"language-plaintext highlighter-rouge\">61<\/code>.\u629b\u51fa\u4e0e\u62bd\u8c61\u76f8\u5bf9\u5e94\u7684\u5f02\u5e38<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u66f4\u9ad8\u5c42\u7684\u5b9e\u73b0\u5e94\u8be5\u6355\u83b7\u4f4e\u5c42\u7684\u5f02\u5e38\uff0c\u540c\u65f6\u629b\u51fa\u53ef\u4ee5\u6309\u7167\u9ad8\u5c42\u62bd\u8c61\u8fdb\u884c\u89e3\u91ca\u7684\u5f02\u5e38\uff0c\u8fd9\u79cd\u505a\u6cd5\u79f0\u4e3a<code class=\"language-plaintext highlighter-rouge\">\u5f02\u5e38\u8f6c\u8bd1<\/code><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u4e00\u79cd\u7279\u6b8a\u7684\u5f02\u5e38\u8f6c\u8bd1\u5f62\u5f0f\u79f0\u4e3a<code class=\"language-plaintext highlighter-rouge\">\u5f02\u5e38\u94fe<\/code>\uff0c\u5982\u679c\u4f4e\u5c42\u5f02\u5e38\u5bf9\u4e8e\u8c03\u8bd5\u9ad8\u5c42\u5f02\u5e38\u6709\u5e2e\u52a9\uff0c\u5c31\u9002\u5408\u4f7f\u7528\u5f02\u5e38\u94fe\uff0c\u9ad8\u5c42\u5f02\u5e38\u63d0\u4f9b\u8bbf\u95ee\u65b9\u6cd5\u83b7\u5f97\u4f4e\u5c42\u5f02\u5e38\uff08<code class=\"language-plaintext highlighter-rouge\">Throwable.getCause<\/code>\uff09<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5927\u591a\u6570\u6807\u51c6\u5f02\u5e38\u90fd\u6709\u5f02\u5e38\u94fe\u6784\u9020\u5668\uff0c\u6ca1\u6709\u5f02\u5e38\u94fe\u6784\u9020\u5668\u7684\uff0c\u53ef\u4ee5\u4f7f\u7528Throwable\u7684<code class=\"language-plaintext highlighter-rouge\">initCause<\/code>\u65b9\u6cd5\u8bbe\u7f6e\u539f\u56e0\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5f02\u5e38\u8f6c\u8bd1\u4e0d\u5e94\u6ee5\u7528\uff0c\u66f4\u597d\u7684\u505a\u6cd5\u662f<strong>\u53ca\u65f6\u8fdb\u884c\u53c2\u6570\u68c0\u67e5<\/strong>\uff0c\u5c3d\u65e9\u4e2d\u65ad\u5f02\u5e38\u94fe\u3002<\/p>\n\n<h2 id=\"62\u6bcf\u4e2a\u65b9\u6cd5\u629b\u51fa\u7684\u5f02\u5e38\u90fd\u8981\u6709\u6587\u6863\"><code class=\"language-plaintext highlighter-rouge\">62<\/code>.\u6bcf\u4e2a\u65b9\u6cd5\u629b\u51fa\u7684\u5f02\u5e38\u90fd\u8981\u6709\u6587\u6863<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u59cb\u7ec8\u8981\u5355\u72ec\u58f0\u660e\u53d7\u68c0\u7684\u5f02\u5e38\uff0c\u800c\u4e0d\u662f\u629b\u51fa\u591a\u4e2a\u5f02\u5e38\u7684\u5171\u540c\u7684\u8d85\u7c7b\uff0c\u5e76\u4e14\u5229\u7528<code class=\"language-plaintext highlighter-rouge\">@throws<\/code>\u6807\u8bb0\uff0c\u51c6\u786e\u8bb0\u5f55\u4e0b\u629b\u51fa\u6bcf\u4e2a\u5f02\u5e38\u7684\u6761\u4ef6<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u4e0d\u8981\u5728\u65b9\u6cd5\u58f0\u660e\u4e2d\u629b\u51fa\u4efb\u4f55<code class=\"language-plaintext highlighter-rouge\">RuntimException<\/code><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5982\u679c\u4e00\u4e2a\u7c7b\u4e2d\u7684\u591a\u4e2a\u65b9\u6cd5\u51fa\u4e8e\u540c\u6837\u7684\u539f\u56e0\u629b\u51fa\u540c\u6837\u7684\u5f02\u5e38\uff0c\u53ef\u4ee5\u5c06\u5f02\u5e38\u7684\u4fe1\u606f\u5199\u5165\u5230\u7c7b\u7684\u6587\u6863\u6ce8\u91ca\u4e2d\u3002<\/p>\n\n<h2 id=\"63\u5728\u7ec6\u8282\u6d88\u606f\u4e2d\u5305\u542b\u80fd\u6355\u6349\u5931\u8d25\u7684\u4fe1\u606f\"><code class=\"language-plaintext highlighter-rouge\">63<\/code>.\u5728\u7ec6\u8282\u6d88\u606f\u4e2d\u5305\u542b\u80fd\u6355\u6349\u5931\u8d25\u7684\u4fe1\u606f<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5982\u679c\u6355\u83b7\u5931\u8d25\uff0c\u5f02\u5e38\u7684\u7ec6\u8282\u4fe1\u606f\u5e94\u8be5\u5305\u542b\u6240\u6709\u5bf9\u5f02\u5e38\u6709\u8d21\u732e\u7684\u53c2\u6570\u548c\u57df\u7684\u503c<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5728\u5f02\u5e38\u7684<strong>\u6784\u9020\u5668<\/strong>\u4e2d\u5f15\u5165\u7ec6\u8282\u4fe1\u606f<\/p>\n\n<h2 id=\"64\u52aa\u529b\u4f7f\u5931\u8d25\u4fdd\u6301\u539f\u5b50\u6027\"><code class=\"language-plaintext highlighter-rouge\">64<\/code>.\u52aa\u529b\u4f7f\u5931\u8d25\u4fdd\u6301\u539f\u5b50\u6027<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5931\u8d25\u7684\u65b9\u6cd5\u8c03\u7528\u5e94\u8be5\u4f7f\u5bf9\u8c61\u4fdd\u6301\u5728\u88ab\u8c03\u7528\u4e4b\u524d\u7684\u72b6\u6001<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u4fdd\u6301\u5931\u8d25\u539f\u5b50\u6027\u7684\u65b9\u6cd5\uff1a<\/p>\n\n<blockquote>\n  <ul>\n    <li>\n      <p>\u8bbe\u8ba1\u4e0d\u53ef\u53d8\u7c7b<\/p>\n    <\/li>\n    <li>\n      <p>\u68c0\u67e5\u53c2\u6570\u6709\u6548\u6027\uff0c\u63d0\u524d\u5931\u8d25\uff0c\u5c06\u6240\u6709\u53ef\u80fd\u4ea7\u751f\u5931\u8d25\u7684\u8fd0\u7b97\u653e\u5230\u6539\u53d8\u72b6\u6001\u7684\u64cd\u4f5c\u4e4b\u524d<\/p>\n    <\/li>\n    <li>\n      <p>\u7f16\u5199\u6062\u590d\u4ee3\u7801<\/p>\n    <\/li>\n    <li>\n      <p>\u5728\u5bf9\u8c61\u7684\u4e00\u4efd\u4e34\u65f6\u62f7\u8d1d\u4e0a\u64cd\u4f5c\uff0c\u7136\u540e\u7528\u62f7\u8d1d\u4e2d\u7684\u7ed3\u679c\u4ee3\u66ff\u5bf9\u8c61\u7684\u5185\u5bb9\uff08\u5982<code class=\"language-plaintext highlighter-rouge\">Collections.sort<\/code>\uff09<\/p>\n    <\/li>\n  <\/ul>\n<\/blockquote>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5728\u7f3a\u4e4f\u540c\u6b65\u673a\u5236\u7684\u60c5\u51b5\u4e0b\u5e76\u53d1\u8bbf\u95ee\u5bf9\u8c61\uff0c\u96be\u4ee5\u4fdd\u6301\u5931\u8d25\u539f\u5b50\u6027\u3002<\/p>\n\n<h2 id=\"65\u4e0d\u8981\u5ffd\u7565\u5f02\u5e38\"><code class=\"language-plaintext highlighter-rouge\">65<\/code>.\u4e0d\u8981\u5ffd\u7565\u5f02\u5e38<\/h2>\n\n<p>\u6709\u4e00\u79cd\u60c5\u5f62\u53ef\u4ee5\u5ffd\u7565\u5f02\u5e38\uff0c\u5373\u5173\u95edFileInputStream\u65f6\uff0c\u56e0\u4e3a\u6587\u4ef6\u72b6\u6001\u6ca1\u6709\u6539\u53d8\uff0c\u4e0d\u5fc5\u7ec8\u6b62\u5f53\u524d\u64cd\u4f5c\uff0c\u5373\u4f7f\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4e5f\u5e94\u8be5\u5c06\u5f02\u5e38\u4fe1\u606f\u8bb0\u5f55\u4e0b\u6765\uff0c\u4ee5\u4fbf\u6392\u67e5\u3002<\/p>\n\n<hr \/>\n\n<h2 id=\"\u4e5d-\u5e76\u53d1\"><code class=\"language-plaintext highlighter-rouge\">\u4e5d<\/code> \u5e76\u53d1<\/h2>\n\n<h2 id=\"66\u540c\u6b65\u8bbf\u95ee\u5171\u4eab\u7684\u53ef\u53d8\u6570\u636e\"><code class=\"language-plaintext highlighter-rouge\">66<\/code>.\u540c\u6b65\u8bbf\u95ee\u5171\u4eab\u7684\u53ef\u53d8\u6570\u636e<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u540c\u6b65\u53ef\u4ee5\u4fdd\u8bc1\u6bcf\u4e2a\u7ebf\u7a0b\u770b\u5230\u7684\u5bf9\u8c61\u5904\u4e8e\u4e00\u81f4 \u7684\u72b6\u6001\u4e2d\uff1b\u4fdd\u8bc1\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u770b\u5230\u9501\u5bf9\u8c61\u88ab\u4fee\u6539\u7684\u7ed3\u679c\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.java\u8bed\u8a00\u89c4\u8303\u4fdd\u8bc1\uff0c\u8bfb\u6216\u8005\u5199\u4e00\u4e2a\u53d8\u91cf\u662f\u539f\u5b50\u7684\uff0c\u9664\u975e\u8fd9\u4e2a\u53d8\u91cf\u7684\u7c7b\u578b\u4e3a<code class=\"language-plaintext highlighter-rouge\">long<\/code>\u6216<code class=\"language-plaintext highlighter-rouge\">double<\/code><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u8bfb\u5199\u539f\u5b50\u6570\u636e\u7684\u65f6\u5019\u4e5f\u5e94\u8be5\u4f7f\u7528\u540c\u6b65\uff0c\u4e0d\u4ec5\u4e3a\u4e86<code class=\"language-plaintext highlighter-rouge\">\u4e92\u65a5\u8bbf\u95ee<\/code>\uff0c\u4e5f\u4e3a\u4e86\u5728\u7ebf\u7a0b\u95f4\u8fdb\u884c\u53ef\u9760\u7684<code class=\"language-plaintext highlighter-rouge\">\u901a\u4fe1<\/code>\u3002\u8be6\u89c1<strong>java\u5185\u5b58\u6a21\u578b<\/strong>\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u4e0d\u8981\u7528<code class=\"language-plaintext highlighter-rouge\">Thead.sotp<\/code>\u3002\u8981\u4e2d\u65ad\u4e00\u4e2a\u7ebf\u7a0b\uff0c\u5efa\u8bae\u505a\u6cd5\u662f\u8f6e\u8be2boolean\u57df\uff0c\u901a\u8fc7\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u4fee\u6539\u8fd9\u4e2aboolean\u57df\uff1b\u5177\u4f53\u65b9\u6cd5\u662f\u6dfb\u52a0\u5bf9\u8fd9\u4e2aboolean\u57df\u7684\u8bfb\u5199\u65b9\u6cd5\uff0c\u5e76\u5bf9\u8bfb\u5199\u65b9\u6cd5\u6dfb\u52a0<code class=\"language-plaintext highlighter-rouge\">\u540c\u6b65<\/code>\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.<code class=\"language-plaintext highlighter-rouge\">volatile<\/code>\u4fee\u9970\u7b26\u867d\u7136<strong>\u4e0d<\/strong>\u6267\u884c\u4e92\u65a5\u8bbf\u95ee\uff0c\u4f46\u662f\u53ef\u4ee5\u4fdd\u8bc1\u6bcf\u4e2a\u7ebf\u7a0b\u5728\u8bfb\u53d6\u8be5\u57df\u7684\u65f6\u5019\u90fd\u80fd\u770b\u5230<strong>\u6700\u8fd1<\/strong>\u521a\u88ab\u5199\u5165\u7684\u503c\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">AtomicLong<\/code>\u8fdb\u884c\u539f\u5b50\u5316long\u64cd\u4f5c<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">7<\/code>.\u6700\u4f73\u505a\u6cd5\u662f\u8981\u4e48\u4e0d\u5171\u4eab\u53ef\u53d8\u6570\u636e\uff0c\u8981\u4e48\u5c31\u5171\u4eab\u4e0d\u53ef\u53d8\u6570\u636e\uff0c\u5c31\u662f\u5c06\u53ef\u53d8\u6570\u636e\u9650\u5236\u5728\u5355\u4e2a\u7ebf\u7a0b\u5185\u90e8\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">8<\/code>.\u6d3b\u6027\u5931\u8d25\uff1a\u7ebf\u7a0b\u6c38\u8fdc\u65e0\u6cd5\u8bfb\u53d6\u5230\u53d8\u91cf\u7684\u53d8\u5316<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">9<\/code>.\u5b89\u5168\u6027\u5931\u8d25\uff1a\u4e00\u4e2a\u7ebf\u7a0b\u4fee\u6539\u975e\u539f\u5b50\u53d8\u91cf\u65f6\uff0c\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u8fc7\u6765\u8bfb\u53d6\uff0c\u6b64\u65f6\u53ea\u80fd\u8bfb\u53d6\u5230<strong>\u8fc7\u6e21<\/strong>\u72b6\u6001\u7684\u6570\u636e\u3002<\/p>\n\n<h2 id=\"67\u907f\u514d\u8fc7\u5ea6\u540c\u6b65\"><code class=\"language-plaintext highlighter-rouge\">67<\/code>.\u907f\u514d\u8fc7\u5ea6\u540c\u6b65<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u4e3a\u4e86\u907f\u514d\u6d3b\u6027\u5931\u8d25\u548c\u5b89\u5168\u6027\u5931\u8d25\uff0c\u5728\u4e00\u4e2a\u88ab\u540c\u6b65\u7684\u65b9\u6cd5\u6216\u8005\u4ee3\u7801\u5757\u4e2d\uff0c\u6c38\u8fdc\u4e0d\u8981\u653e\u5f03\u5bf9\u5ba2\u6237\u7aef\u7684\u63a7\u5236\u3002\u5c3d\u91cf\u4e0d\u8981\u5728\u540c\u6b65\u4ee3\u7801\u5757\u4e2d\u8c03\u7528\u53ef\u88ab\u8986\u76d6\u7684\u65b9\u6cd5\u6216\u8005\u5ba2\u6237\u7aef\u63d0\u4f9b\u7684\u65b9\u6cd5\uff08<strong>\u539f\u5219\u4e0a\u6c38\u8fdc\u4e0d\u8981\u4fe1\u4efb\u5ba2\u6237\u7aef<\/strong>\uff09<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5f53\u5ba2\u6237\u7aef\u9020\u6210\u670d\u52a1\u7aef\u53d8\u5316\u540e\u80fd\u591f\u9884\u5b9a\u901a\u77e5\uff0c\u5373\u89c2\u5bdf\u8005\uff08<code class=\"language-plaintext highlighter-rouge\">Observer<\/code>\uff09\u6a21\u5f0f<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u7ebf\u7a0bB\u9700\u8981\u83b7\u5f97\u9501\u624d\u80fd\u7ee7\u7eed\u6267\u884c\uff0c\u4f46\u662f\u7ebf\u7a0bB\u6267\u884c\u5b8c\u5f53\u524d\u7684\u4ee3\u7801\u7247\u6bb5\u540e\uff0c\u7ebf\u7a0bA\u624d\u80fd\u8ba9\u51fa\u9501\uff0c\u6b64\u65f6\u5c06\u4f1a\u9020\u6210<code class=\"language-plaintext highlighter-rouge\">\u6b7b\u9501<\/code>\u3002\u6b7b\u9501\u7684\u6839\u672c\u539f\u56e0\u662f\uff0c\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u9700\u6c42\u540c\u6b65\u9501\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.java\u4e2d\u7684\u9501\u662f<code class=\"language-plaintext highlighter-rouge\">\u53ef\u91cd\u5165<\/code>\u7684\uff0c\u8fd9\u6837\u7684\u9501\u7b80\u5316\u4e86\u591a\u7ebf\u7a0b\u9762\u5411\u5bf9\u8c61\u7684\u6784\u9020<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u4e0d\u8981\u628a\u9501\u5bf9\u8c61\u4f20\u9012\u7ed9\u5ba2\u6237\u7aef\uff0c\u800c\u662f\u4f20\u9012\u9501\u5bf9\u8c61\u7684\u5feb\u7167\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u6b7b\u9501<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.java\u7c7b\u5e93\u63d0\u4f9b\u4e86\u5e76\u53d1\u96c6\u5408<code class=\"language-plaintext highlighter-rouge\">CopyOnWriteArrayList<\/code><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">7<\/code>.\u540c\u6b65\u533a\u57df\u5185\u7684\u5de5\u4f5c\u8d8a\u5c11\u8d8a\u597d<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">8<\/code>.\u5982\u679c\u4e00\u4e2a\u53ef\u53d8\u7684\u7c7b\u9700\u8981\u5e76\u53d1\u8bbf\u95ee\uff0c\u5e94\u8be5\u4f7f\u8fd9\u4e2a\u7c7b\u53d8\u6210\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u901a\u8fc7\u5185\u90e8\u540c\u6b65\u53ef\u4ee5\u5b9e\u73b0\uff1b\u5982\u679c\u4e0d\u786e\u5b9a\u662f\u5426\u9700\u8981\u540c\u6b65\uff0c\u90a3\u5c31\u4e0d\u8981\u540c\u6b65\uff0c\u5e76\u5efa\u7acb\u6587\u6863\uff0c\u6ce8\u660e\u5b83\u4e0d\u662f\u7ebf\u7a0b\u5b89\u5168\u7684<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">9<\/code>.\u5982\u679c\u5728\u5185\u90e8\u540c\u6b65\u4e86\u7c7b\uff0c\u5c31\u53ef\u4ee5\u8fdb\u884c<code class=\"language-plaintext highlighter-rouge\">\u5206\u62c6\u9501<\/code>\uff0c<code class=\"language-plaintext highlighter-rouge\">\u5206\u79bb\u9501<\/code>\u548c<code class=\"language-plaintext highlighter-rouge\">\u975e\u963b\u585e<\/code>\u5e76\u53d1\u63a7\u5236<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">10<\/code>.\u5982\u679c\u65b9\u6cd5\u4fee\u6539\u4e86\u9759\u6001\u57df\uff0c\u90a3\u4e48\u5c31\u5fc5\u987b\u540c\u6b65\u5bf9\u8fd9\u4e2a\u57df\u7684\u8bbf\u95ee\uff0c\u5373\u4f7f\u5b83\u5f80\u5f80\u53ea\u4f5c\u7528\u4e8e\u5355\u4e2a\u7ebf\u7a0b\uff0c\u8fd9\u662f\u4e3a\u4e86\u53ef\u9760\u7684\u7ebf\u7a0b\u901a\u4fe1<\/p>\n\n<h2 id=\"68executor\u548ctask\u4f18\u5148\u4e8e\u7ebf\u7a0b\"><code class=\"language-plaintext highlighter-rouge\">68<\/code>.executor\u548ctask\u4f18\u5148\u4e8e\u7ebf\u7a0b<\/h2>\n\n<p>1.<code class=\"language-plaintext highlighter-rouge\">Executor Framework<\/code><\/p>\n\n<div class=\"language-plaintext highlighter-rouge\"><div class=\"highlight\"><pre class=\"highlight\"><code>ExecutorService executor = Executors.newSingleThreadExecutor();\nexecutor.execute(runnable);\nexecutor.shutdown();\ninvokeAny\ninvokeAll\nawaitTermination\nExecutorCompletionService\n<\/code><\/pre><\/div><\/div>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5982\u679c\u7f16\u5199\u7684\u662f\u5c0f\u7a0b\u5e8f\uff0c\u6216\u8005\u8f7b\u8f7d\u670d\u52a1\u5668\uff0c\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">Executors.newCachedThreadPool<\/code><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5728\u5927\u8d1f\u8f7d\u7684\u4ea7\u54c1\u670d\u52a1\u5668\u4e2d\uff0c\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">Executors.newFixedThreadPool<\/code><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5c3d\u91cf\u4e0d\u8981\u7f16\u5199\u81ea\u5df1\u7684\u5de5\u4f5c\u961f\u5217\uff0c\u5c3d\u91cf\u4e0d\u76f4\u63a5\u4f7f\u7528\u7ebf\u7a0b\u3002\u73b0\u5728\u7684\u5173\u952e\u62bd\u8c61\u4e0d\u518d\u662fThread\u4e86\uff0c\u800c\u662ftask\u3002task\u6709\u4e24\u79cd\uff1aRunnable\u4e0eCallable\uff0c\u6267\u884c\u4efb\u52a1\u7684\u5173\u952e\u673a\u5236\u662fExecutorService\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.ScheduledThreadPool\u4ee3\u66ffTimer<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u300a<code class=\"language-plaintext highlighter-rouge\">Java Concurrency in Practice<\/code>\u300b<\/p>\n\n<h2 id=\"69\u5e76\u53d1\u5de5\u5177\u4f18\u5148\u4e8ewait\u548cnotify\"><code class=\"language-plaintext highlighter-rouge\">69<\/code>.\u5e76\u53d1\u5de5\u5177\u4f18\u5148\u4e8ewait\u548cnotify<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.concurrent\u5305\u4e2d\u4e09\u7c7b\u5de5\u5177\uff1a<\/p>\n\n<blockquote>\n  <ul>\n    <li>\n      <p>Executor Framework<\/p>\n    <\/li>\n    <li>\n      <p>\u5e76\u53d1\u96c6\u5408<\/p>\n    <\/li>\n    <li>\n      <p>\u540c\u6b65\u5668<\/p>\n    <\/li>\n  <\/ul>\n<\/blockquote>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5e76\u53d1\u96c6\u5408\u4e2d\u4e0d\u53ef\u80fd\u6392\u9664\u5e76\u53d1\u6d3b\u52a8\uff0c\u5c06\u4ed6\u9501\u5b9a\u6ca1\u4ec0\u4e48\u4f5c\u7528\uff0c\u53ea\u4f1a\u4f7f\u7a0b\u5e8f\u901f\u5ea6\u53d8\u6162\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5e94\u8be5\u4f18\u5148\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">ConcurrentHashMap<\/code>\uff0c\u800c\u4e0d\u662f<code class=\"language-plaintext highlighter-rouge\">Collections.synchronizedMap<\/code>\u6216\u8005<code class=\"language-plaintext highlighter-rouge\">Hashtable<\/code><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u963b\u585e\u961f\u5217\u7528\u4e8e\u5de5\u4f5c\u961f\u5217\u6216<strong>\u751f\u4ea7\u8005-\u6d88\u8d39\u8005<\/strong>\u961f\u5217\uff0c\u4efb\u610f\u4e2a\u751f\u4ea7\u8005\u7ebf\u7a0b\u5411\u5de5\u4f5c\u961f\u5217\u4e2d\u6dfb\u52a0\u9879\u76ee\uff0c\u5e76\u4e14\u5f53\u5de5\u4f5c\u9879\u76ee\u53ef\u7528\u65f6\uff0c\u4efb\u610f\u4e2a\u6d88\u8d39\u8005\u7ebf\u7a0b\u4ece\u5de5\u4f5c\u961f\u5217\u4e2d\u53d6\u51fa\u9879\u76ee<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u540c\u6b65\u5668\u662f\u4e00\u4e9b\u4f7f\u7ebf\u7a0b\u80fd\u591f\u7b49\u5f85\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u7684\u5bf9\u8c61\uff08\u4e92\u65a5\uff09\uff0c\u6700\u5e38\u7528\u7684\u540c\u6b65\u5668\u662f<code class=\"language-plaintext highlighter-rouge\">CountDownLatch<\/code>\u548c<code class=\"language-plaintext highlighter-rouge\">Semaphore<\/code>\uff0c\u8f83\u4e0d\u5e38\u7528\u7684\u662fCyclicBarrier\u548cExchanger<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u5012\u8ba1\u6570\u9501\u5b58\u5668\uff0c\u5f53countDown\u6570\u91cf\u8db3\u591f\u65f6\uff0c\u5c06\u81ea\u52a8\u4ece<code class=\"language-plaintext highlighter-rouge\">await<\/code>\u72b6\u6001\u5524\u9192\uff0c\u5426\u5219\u5c06\u7ee7\u7eed\u7b49\u5f85\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">7<\/code>.\u7ebf\u7a0b\u9965\u997f\u6b7b\u9501<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">8<\/code>.\u5bf9\u4e8e\u95f4\u6b47\u5f0f\u7684\u5b9a\u65f6\uff0c\u59cb\u7ec8\u5e94\u8be5\u4f18\u5148\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">System.nanoTime<\/code>\uff0c\u800c\u4e0d\u662fSystem.currentTimeMills<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">9<\/code>.<code class=\"language-plaintext highlighter-rouge\">a.wait()<\/code>\uff0c\u4f7f\u6240\u6709\u8bbf\u95eea\u5bf9\u8c61\u7684\u7ebf\u7a0b\u7b49\u5f85\uff0c\u8be5\u65b9\u6cd5\u5fc5\u987b\u5728\u540c\u6b65\u533a\u57df\u5185\u88ab\u8c03\u7528\uff1b\u59cb\u7ec8\u5e94\u8be5\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">wait\u5faa\u73af\u6a21\u5f0f<\/code>\u8c03\u7528wati\u65b9\u6cd5\uff0c\u6c38\u8fdc\u4e0d\u8981\u5728\u5faa\u73af\u4e4b\u5916\u8c03\u7528wait\u65b9\u6cd5\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">10<\/code>.\u4f18\u5148\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">notifyAll<\/code>\uff0c\u56e0\u4e3a\u88ab\u610f\u5916\u5524\u9192\u7684\u7ebf\u7a0b\u4f1a\u5728\u5faa\u73af\u4e2d\u68c0\u67e5\u6761\u4ef6\uff0c\u5982\u679c\u6761\u4ef6\u4e0d\u6ee1\u8db3\uff0c\u4f1a\u7ee7\u7eed\u7b49\u5f85\u3002<\/p>\n\n<h2 id=\"70\u7ebf\u7a0b\u5b89\u5168\u6027\u7684\u6587\u6863\u5316\"><code class=\"language-plaintext highlighter-rouge\">70<\/code>.\u7ebf\u7a0b\u5b89\u5168\u6027\u7684\u6587\u6863\u5316<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5728\u4e00\u4e2a\u65b9\u6cd5\u58f0\u660e\u4e2d\u51fa\u73b0synchronized\u4fee\u9970\u7b26\uff0c\u8fd9\u4e2a\u662f\u5b9e\u73b0\u7ec6\u8282\uff0c\u4e0d\u662f\u5bfc\u51faAPI\u7684\u4e00\u90e8\u5206<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u4e00\u4e2a\u7c7b\u4e3a\u4e86\u53ef\u4ee5\u88ab\u591a\u4e2a\u7ebf\u7a0b\u5b89\u5168\u5730\u4f7f\u7528\uff0c\u5fc5\u987b\u5728\u6587\u6863\u4e2d\u6e05\u695a\u8bf4\u660e\u5b83\u6240\u652f\u6301\u7684\u7ebf\u7a0b\u5b89\u5168\u7ea7\u522b\uff1a<\/p>\n\n<blockquote>\n  <ul>\n    <li>\n      <p><strong>\u4e0d\u53ef\u53d8\u7684<\/strong><\/p>\n    <\/li>\n    <li>\n      <p><strong>\u65e0\u6761\u4ef6\u7684\u7ebf\u7a0b\u5b89\u5168<\/strong>\uff1a\u53ef\u53d8\u7c7b\uff0c\u4f46\u662f\u6709\u8db3\u591f\u7684\u5185\u90e8\u540c\u6b65\uff0c\u53ef\u4ee5\u88ab\u5e76\u53d1\u4f7f\u7528<\/p>\n    <\/li>\n    <li>\n      <p><strong>\u6709\u6761\u4ef6\u7684\u7ebf\u7a0b\u5b89\u5168<\/strong>\uff1a\u67d0\u4e9b\u65b9\u6cd5\u9700\u8981\u5916\u90e8\u540c\u6b65<\/p>\n    <\/li>\n    <li>\n      <p><strong>\u975e\u7ebf\u7a0b\u5b89\u5168<\/strong>\uff1a\u5fc5\u987b\u5916\u90e8\u540c\u6b65<\/p>\n    <\/li>\n    <li>\n      <p><strong>\u7ebf\u7a0b\u5bf9\u7acb<\/strong>\uff1a\u5373\u4f7f\u6240\u6709\u8c03\u7528\u90fd\u6709\u5916\u90e8\u540c\u6b65\uff0c\u4f9d\u65e7\u4e0d\u80fd\u5b89\u5168\u5730\u5e76\u53d1\u4f7f\u7528\u3002\u901a\u5e38\u56e0\u4e3a\u6ca1\u6709\u540c\u6b65\u5730\u4fee\u6539\u9759\u6001\u6570\u636e<\/p>\n    <\/li>\n  <\/ul>\n<\/blockquote>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5fc5\u987b\u6307\u660e\u54ea\u4e2a\u8c03\u7528\u5e8f\u5217\u9700\u8981\u5916\u90e8\u540c\u6b65\uff0c\u8fd8\u8981\u6307\u660e\u4e3a\u4e86\u8c03\u7528\u8fd9\u4e2a\u5e8f\u5217\uff0c<strong>\u5fc5\u987b\u83b7\u5f97\u54ea\u4e00\u628a\u9501<\/strong>\u3002\u5982\u679c\u4e00\u4e2a\u5bf9\u8c61\u4ee3\u8868\u4e86\u53e6\u4e00\u4e2a\u5bf9\u8c61\u7684\u4e00\u4e2a\u89c6\u56fe\uff0c\u5ba2\u6237\u7aef\u901a\u5e38\u5c31\u5fc5\u987b\u5728\u540e\u53f0\u5bf9\u8c61\u4e0a\u540c\u6b65\uff0c\u4ee5\u9632\u6b62\u5176\u4ed6\u7ebf\u7a0b\u76f4\u63a5\u4fee\u6539\u540e\u53f0\u5bf9\u8c61\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u9664\u975e\u4ece\u8fd4\u56de\u7c7b\u578b\u6765\u770b\u5df2\u975e\u5e38\u660e\u663e\uff0c\u5426\u5219\u9759\u6001\u5de5\u5382\u5fc5\u987b\u5728\u6587\u6863\u4e2d\u8bf4\u660e\u88ab\u8fd4\u56de\u5bf9\u8c61\u7684\u7ebf\u7a0b\u5b89\u5168\u6027<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u79c1\u6709\u9501\u5bf9\u8c61\u5fc5\u987b\u58f0\u660e\u4e3afinal\u7684\uff0c\u53ea\u80fd\u7528\u5728\u65e0\u6761\u4ef6\u7ebf\u7a0b\u5b89\u5168\u7c7b\u4e0a\uff0c\u6709\u6761\u4ef6\u7ebf\u7a0b\u5b89\u5168\u7c7b\u4e0d\u80fd\u4f7f\u7528\uff0c\u56e0\u4e3a\u5916\u90e8\u8c03\u7528\u65f6\u65e0\u6cd5\u83b7\u5f97\u9501\u3002<\/p>\n\n<h2 id=\"71\u614e\u7528\u5ef6\u8fdf\u521d\u59cb\u5316\"><code class=\"language-plaintext highlighter-rouge\">71<\/code>.\u614e\u7528\u5ef6\u8fdf\u521d\u59cb\u5316<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5bf9\u9759\u6001\u57df\u4f7f\u7528\u5ef6\u8fdf\u521d\u59cb\u5316\uff0c\u7528 <code class=\"language-plaintext highlighter-rouge\">lazy initialization holder class<\/code> \u6a21\u5f0f\uff08\u9759\u6001\u79c1\u6709\u5185\u90e8\u7c7b\uff09<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5bf9\u5b9e\u4f8b\u57df\u4f7f\u7528\u5ef6\u8fdf\u521d\u59cb\u5316\uff0c\u7528<strong>\u53cc\u91cd\u68c0\u67e5\u6a21\u5f0f<\/strong>\uff0c\u7b2c\u4e8c\u6b21\u68c0\u67e5\u5728\u540c\u6b65\u4e2d\u8fdb\u884c<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5982\u679c\u5141\u8bb8\u91cd\u590d\u521d\u59cb\u5316\uff0c\u7528<strong>\u5355\u91cd\u68c0\u67e5\u6a21\u5f0f<\/strong><\/p>\n\n<h2 id=\"72\u4e0d\u8981\u4f9d\u8d56\u4e8e\u7ebf\u7a0b\u8c03\u5ea6\u5668\"><code class=\"language-plaintext highlighter-rouge\">72<\/code>.\u4e0d\u8981\u4f9d\u8d56\u4e8e\u7ebf\u7a0b\u8c03\u5ea6\u5668<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u4efb\u4f55\u4f9d\u8d56\u4e8e\u7ebf\u7a0b\u8c03\u5ea6\u5668\u6765\u8fbe\u5230\u6b63\u786e\u6027\u6216\u8005\u6027\u80fd\u8981\u6c42\u7684\u7a0b\u5e8f\uff0c\u5f88\u53ef\u80fd\u4e0d\u53ef\u79fb\u690d<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u6700\u597d\u7684\u529e\u6cd5\u662f\u786e\u4fdd\u53ef\u8fd0\u884c\u7684\u7ebf\u7a0b\u5e73\u5747\u6570\u91cf<strong>\u4e0d<\/strong>\u660e\u663e\u591a\u4e8e\u5904\u7406\u5668\u6570\u91cf<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5982\u679c\u7ebf\u7a0b\u6ca1\u6709\u5728\u505a\u6709\u610f\u4e49\u7684\u5de5\u4f5c\uff0c\u5c31\u4e0d\u5e94\u8be5\u8fd0\u884c<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u4e0d\u8981\u4f01\u56fe\u901a\u8fc7<code class=\"language-plaintext highlighter-rouge\">Thread.yield<\/code>\u6765\u4fee\u6b63\u7a0b\u5e8f\uff0c\u5b83\u552f\u4e00\u7684\u4f5c\u7528\u662f\u5728\u6d4b\u8bd5\u671f\u95f4\u4eba\u4e3a\u589e\u52a0\u7a0b\u5e8f\u7684\u5e76\u53d1\u6027<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u7ebf\u7a0b\u4f18\u5148\u7ea7\u662fJava\u5e73\u53f0\u4e0a\u6700<strong>\u4e0d\u53ef\u79fb\u690d<\/strong>\u7684\u7279\u5f81<\/p>\n\n<h2 id=\"73\u907f\u514d\u4f7f\u7528\u7ebf\u7a0b\u7ec4\"><code class=\"language-plaintext highlighter-rouge\">73<\/code>.\u907f\u514d\u4f7f\u7528\u7ebf\u7a0b\u7ec4<\/h2>\n\n<hr \/>\n\n<h1 id=\"\u5341-\u5e8f\u5217\u5316\"><code class=\"language-plaintext highlighter-rouge\">\u5341<\/code> \u5e8f\u5217\u5316<\/h1>\n\n<h2 id=\"74\u8c28\u614e\u5730\u5b9e\u73b0serializable\u63a5\u53e3\"><code class=\"language-plaintext highlighter-rouge\">74<\/code>.\u8c28\u614e\u5730\u5b9e\u73b0Serializable\u63a5\u53e3<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5b9e\u73b0Serializable\u63a5\u53e3\u7684\u4ee3\u4ef7\u662f\uff0c<\/p>\n\n<ul>\n  <li>\n    <p>\u4e00\u65e6\u4e00\u4e2a\u7c7b\u88ab\u53d1\u5e03\uff0c\u5c31\u5927\u5927\u964d\u4f4e\u4e86\u6539\u53d8\u8fd9\u4e2a\u7c7b\u5b9e\u73b0\u7684\u53ef\u80fd\u6027<\/p>\n  <\/li>\n  <li>\n    <p>\u589e\u52a0\u4e86\u51fa\u73b0BUG\u548c\u5b89\u5168\u6f0f\u6d1e\u7684\u53ef\u80fd\u6027\uff0c\u53cd\u5e8f\u5217\u5316\u662f\u8bed\u8a00\u4e4b\u5916\u7684\u5bf9\u8c61\u521b\u5efa\u673a\u5236<\/p>\n  <\/li>\n  <li>\n    <p>\u968f\u7740\u7c7b\u53d1\u884c\u65b0\u7684\u7248\u672c\uff0c\u76f8\u5173\u7684\u6d4b\u8bd5\u8d1f\u62c5\u4e5f\u589e\u52a0\u4e86<\/p>\n  <\/li>\n<\/ul>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5982\u679c\u6ca1\u6709\u58f0\u660e<code class=\"language-plaintext highlighter-rouge\">serialVersionUID<\/code>\uff0c\u7cfb\u7edf\u5c06\u5728\u8fd0\u884c\u65f6\u901a\u8fc7\u7c7b\u540d\uff0c\u63a5\u53e3\uff0c\u6210\u5458\u7b49\u81ea\u52a8\u4ea7\u751f<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u4e3a\u4e86\u7ee7\u627f\u800c\u8bbe\u8ba1\u7684\u7c7b\uff0c\u5e94\u8be5<strong>\u5c3d\u5c11<\/strong>\u5b9e\u73b0Serializable\u63a5\u53e3\uff0c\u7528\u6237\u63a5\u53e3\u4e5f\u5e94\u8be5\u5c3d\u5c11\u7ee7\u627fSerializable\u63a5\u53e3<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5982\u679c\u7c7b\u6709\u4e00\u4e9b\u7ea6\u675f\u6761\u4ef6\uff0c\u5f53\u7c7b\u7684\u5b9e\u4f8b\u57df\u88ab\u521d\u59cb\u5316\u4e3a\u9ed8\u8ba4\u503c\uff0c\u5c31\u4f1a\u8fdd\u80cc\u8fd9\u4e9b\u7ea6\u675f\u6761\u4ef6\uff0c\u6b64\u65f6\u9700\u8981\u6dfb\u52a0<code class=\"language-plaintext highlighter-rouge\">readObjectNoData<\/code>\u65b9\u6cd5\uff0c\u5e76\u5728\u5176\u4e2d\u629b\u51fa<code class=\"language-plaintext highlighter-rouge\">InvalidObjectException<\/code><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u5bf9\u4e8e\u4e3a\u7ee7\u627f\u800c\u8bbe\u8ba1\u7684\u53ef\u5e8f\u5217\u5316\u7684\u7c7b\uff0c\u5e94\u8be5\u63d0\u4f9b\u4e00\u4e2a<strong>\u65e0\u53c2\u6784\u9020\u5668<\/strong>\uff0c\u4ee5\u53ca\u4e00\u4e2a<strong>\u521d\u59cb\u5316\u65b9\u6cd5<\/strong>\uff0creadObject\u4e0e\u6709\u53c2\u6784\u9020\u5668\u5171\u7528\u8fd9\u4e2a\u521d\u59cb\u5316\u65b9\u6cd5<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.<code class=\"language-plaintext highlighter-rouge\">AtomicReference<\/code>\u64cd\u4f5c\u539f\u5b50\u5f15\u7528\uff0c\u8fd9\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u7ebf\u7a0b\u5b89\u5168\u72b6\u6001\u673a<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">7<\/code>.\u5185\u90e8\u7c7b\u4e0d\u5e94\u8be5\u5b9e\u73b0Serializable\uff0c\u5185\u90e8\u7c7b\u7684\u9ed8\u8ba4\u5e8f\u5217\u5316\u5f62\u5f0f\u662f\u5b9a\u4e49\u4e0d\u6e05\u695a\u7684\uff0c\u7136\u800c\u9759\u6001\u6210\u5458\u7c7b\u5374\u53ef\u4ee5\u5b9e\u73b0Serializable<\/p>\n\n<h2 id=\"75\u8003\u8651\u4f7f\u7528\u81ea\u5b9a\u4e49\u7684\u5e8f\u5217\u5316\u5f62\u5f0f\"><code class=\"language-plaintext highlighter-rouge\">75<\/code>.\u8003\u8651\u4f7f\u7528\u81ea\u5b9a\u4e49\u7684\u5e8f\u5217\u5316\u5f62\u5f0f<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5982\u679c\u6ca1\u6709\u5148\u8ba4\u771f\u8003\u8651\u9ed8\u8ba4\u7684\u5e8f\u5217\u5316\u5f62\u5f0f\u662f\u5426\u5408\u9002\uff0c\u5219\u4e0d\u8981\u8d38\u7136\u63a5\u53d7\uff1b\u7406\u60f3\u7684\u5e8f\u5217\u5316\u5f62\u5f0f\u5e94\u8be5\u53ea\u5305\u542b\u8be5\u5bf9\u8c61\u6240\u8868\u793a\u7684<strong>\u903b\u8f91\u6570\u636e<\/strong>\uff0c\u800c\u903b\u8f91\u6570\u636e\u4e0e\u7269\u7406\u8868\u793a\u6cd5\u5e94\u8be5\u662f\u5404\u81ea\u72ec\u7acb\u7684<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5982\u679c\u4e00\u4e2a\u5bf9\u8c61\u7684\u7269\u7406\u8868\u793a\u6cd5\u7b49\u540c\u4e8e\u5b83\u7684\u903b\u8f91\u5185\u5bb9\uff0c\u53ef\u80fd\u5c31\u9002\u5408\u4e8e\u4f7f\u7528\u9ed8\u8ba4\u7684\u5e8f\u5217\u5316\u5f62\u5f0f<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u5373\u4f7f\u786e\u8ba4\u4e86\u9ed8\u8ba4\u7684\u5e8f\u5217\u5316\u5f62\u5f0f\u662f\u5408\u9002\u7684\uff0c\u901a\u5e38\u8fd8\u5fc5\u987b\u63d0\u4f9b\u4e00\u4e2a<code class=\"language-plaintext highlighter-rouge\">readObject<\/code>\u65b9\u6cd5\u4ee5\u4fdd\u8bc1\u7ea6\u675f\u5173\u7cfb\u548c\u5b89\u5168\u6027<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5f53\u4e00\u4e2a\u5bf9\u8c61\u7684\u7269\u7406\u8868\u793a\u6cd5\u4e0e\u903b\u8f91\u5185\u5bb9\u6709\u5b9e\u8d28\u6027\u7684\u533a\u522b\u65f6\uff0c\u4f7f\u7528\u9ed8\u8ba4\u7684\u5e8f\u5217\u5316\u5f62\u5f0f\u4f1a\u6709\u4ee5\u4e0b4\u4e2a\u7f3a\u70b9<\/p>\n\n<ul>\n  <li>\n    <p>\u8fd9\u4e2a\u7c7b\u7684\u5bfc\u51faAPI\u6c38\u8fdc\u675f\u7f1a\u5728\u8be5\u7c7b\u7684\u5185\u90e8\u8868\u793a\u6cd5\u4e0a<\/p>\n  <\/li>\n  <li>\n    <p>\u6d88\u8017\u8fc7\u591a\u7684\u7a7a\u95f4\uff0c\u56e0\u4e3a\u4f1a\u53cd\u5e8f\u5217\u5316\u6240\u6709\u7684\u57df<\/p>\n  <\/li>\n  <li>\n    <p>\u6d88\u8017\u8fc7\u591a\u7684\u65f6\u95f4\uff0c\u56e0\u4e3a\u4f1a\u904d\u5386\u5bf9\u8c61\u56fe\u7684\u62d3\u6251\u5173\u7cfb<\/p>\n  <\/li>\n  <li>\n    <p>\u5f15\u8d77\u6808\u6ea2\u51fa\uff0c\u56e0\u4e3a\u4f1a\u9012\u5f52\u904d\u5386\u5bf9\u8c61\u56fe<\/p>\n  <\/li>\n<\/ul>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.<code class=\"language-plaintext highlighter-rouge\">defaultWriteObject<\/code>\u65b9\u6cd5\u88ab\u8c03\u7528\u7684\u65f6\uff0c\u6bcf\u4e2a<strong>\u672a<\/strong>\u88ab\u6807\u8bb0\u4e3a<code class=\"language-plaintext highlighter-rouge\">transient<\/code>\u7684\u57df\u90fd\u4f1a\u88ab\u5e8f\u5217\u5316\uff1b<code class=\"language-plaintext highlighter-rouge\">defaultReadObject<\/code>\u5c06\u4f1a\u53cd\u5e8f\u5217\u5316\u8fd9\u4e9b\u57df\uff0c\u5728\u51b3\u5b9a\u5c06\u4e00\u4e2a\u57df\u505a\u6210\u975etransient\u4e4b\u524d\uff0c\u4e00\u5b9a\u8981\u786e\u4fe1\u5b83\u7684\u503c\u5c06\u662f\u903b\u8f91\u72b6\u6001\u7684\u4e00\u90e8\u4eba<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u5982\u679c\u6240\u6709\u7684\u57df\u90fd\u662f\u77ac\u65f6\u7684\uff0c\u4e0d\u8c03\u7528defaultWriteObject\u548cdefaultReadObject\u4e5f\u662f\u5141\u8bb8\u7684\uff0c\u4f46\u662f\u4e0d\u63a8\u8350\u8fd9\u4e48\u505a\uff0c\u53ef\u80fd\u4f1a\u5f15\u8d77<code class=\"language-plaintext highlighter-rouge\">StreamCorruptedException<\/code><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">7<\/code>.\u5982\u679c\u5728\u8bfb\u53d6\u6574\u4e2a\u5bf9\u8c61\u72b6\u6001\u7684\u4efb\u4f55\u5176\u4ed6\u65b9\u6cd5\u4e0a\u5f3a\u5236\u4efb\u4f55<strong>\u540c\u6b65<\/strong>\uff0c\u5219\u4e5f\u5fc5\u987b\u5728\u5bf9\u8c61\u5e8f\u5217\u5316\u4e0a\u5f3a\u5236\u8fd9\u79cd\u540c\u6b65<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">8<\/code>.\u4e0d\u7ba1\u9009\u62e9\u54ea\u79cd\u5e8f\u5217\u5316\u5f62\u5f0f\uff0c\u90fd\u8981\u4e3a\u81ea\u5df1\u7f16\u5199\u7684\u6bcf\u4e2a\u53ef\u5e8f\u5217\u5316\u7684\u7c7b\u58f0\u660e\u4e00\u4e2a\u663e\u5f0f\u7684\u5e8f\u5217\u7248\u672c<code class=\"language-plaintext highlighter-rouge\">UID<\/code>\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u56e0\u4e3a\u81ea\u52a8\u751f\u6210UID\u9020\u6210\u4e0d\u517c\u5bb9<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">9<\/code>.\u5982\u679c\u60f3\u4e3a\u4e00\u4e2a\u7c7b\u751f\u6210\u4e00\u4e2a\u65b0\u7684\u7248\u672c\uff0c\u4f7f\u8fd9\u4e2a\u7c7b\u4e0e\u73b0\u6709\u7684\u7c7b\u4e0d\u517c\u5bb9\uff0c\u90a3\u4e48\u53ea\u9700\u4fee\u6539UID\u5373\u53ef\uff0c\u53cd\u5e8f\u5217\u5316\u65f6\u5c06\u4f1a\u53d1\u751f<code class=\"language-plaintext highlighter-rouge\">InvalidClassException<\/code><\/p>\n\n<h2 id=\"76\u4fdd\u62a4\u6027\u5730\u7f16\u5199readobject\u65b9\u6cd5\"><code class=\"language-plaintext highlighter-rouge\">76<\/code>.\u4fdd\u62a4\u6027\u5730\u7f16\u5199readObject\u65b9\u6cd5<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u300a<code class=\"language-plaintext highlighter-rouge\">Java Object Serialization Specification<\/code>\u300b<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5f53\u4e00\u4e2a\u5bf9\u8c61\u88ab\u53cd\u5e8f\u5217\u5316\u7684\u65f6\u5019\uff0c\u5982\u679c\u54ea\u4e2a\u57df\u5c06\u88ab\u5ba2\u6237\u7aef\u6240\u5f15\u7528\uff0c\u5c31\u5fc5\u987b\u8981\u505a<strong>\u4fdd\u62a4\u6027\u62f7\u8d1d<\/strong><\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u4e0d\u8981\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">writeUnshared<\/code>\u548c<code class=\"language-plaintext highlighter-rouge\">readUnshared<\/code>\u65b9\u6cd5<\/p>\n\n<p>writeUnshared\uff1a\u5c06\u201c\u672a\u5171\u4eab\u201d\u5bf9\u8c61\u5199\u5165 ObjectOutputStream\u3002\u6b64\u65b9\u6cd5\u7b49\u540c\u4e8e writeObject\uff0c\u4e0d\u540c\u70b9\u5728\u4e8e\u5b83\u603b\u662f\u5c06\u7ed9\u5b9a\u5bf9\u8c61\u4f5c\u4e3a\u6d41\u4e2d\u60df\u4e00\u7684\u65b0\u5bf9\u8c61\u8fdb\u884c\u5199\u5165<\/p>\n\n<p>readUnshared\uff1a\u4ece\u6d41\u4e2d\u8bfb\u53d6\u4e00\u4e2a\u4e0d\u5171\u4eab\u7684\u5bf9\u8c61\uff0c\u540creadObject\uff0c\u4f46\u4e0d\u4f1a\u8ba9\u540e\u7eed\u7684readObject\u548creadUnshared\u8c03\u7528\u5f15\u7528\u8fd9\u6b21\u8c03\u7528\u53cd\u5e8f\u5217\u5316\u5f97\u5230\u7684\u5bf9\u8c61<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.readObject\u4e0d\u53ef\u4ee5\u8c03\u7528\u53ef\u88ab\u8986\u76d6\u7684\u65b9\u6cd5\uff0c\u4e00\u65e6\u8c03\u7528\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u5c06\u5728\u5b50\u7c7b\u7684\u57df\u88ab\u53cd\u5e8f\u5217\u5316\u4e4b\u524d\u8fd0\u884c\uff0c\u5982\u679c\u8fd9\u4e2a\u65b9\u6cd5\u4f9d\u8d56\u5b50\u7c7b\u7684\u57df\uff0c\u5c06\u5bfc\u81f4\u7a0b\u5e8f\u5931\u8d25<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">5<\/code>.\u5bf9\u4e8e\u4efb\u4f55\u7ea6\u675f\u6761\u4ef6\uff0c\u5982\u679c\u68c0\u67e5\u5931\u8d25\uff0c\u5219\u629b\u51fa<code class=\"language-plaintext highlighter-rouge\">InvalidObjectException<\/code>\uff0c\u8fd9\u5199\u68c0\u67e5\u5e94\u8be5\u5728\u6240\u6709\u7684\u4fdd\u62a4\u6027\u62f7\u8d1d\u4e4b\u540e<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">6<\/code>.\u5982\u679c\u6574\u4e2a\u5bf9\u8c61\u56fe\u5728\u53cd\u5e8f\u5217\u5316\u4e4b\u540e\u5fc5\u987b\u8fdb\u884c\u9a8c\u8bc1\uff0c\u5219\u4f7f\u7528<code class=\"language-plaintext highlighter-rouge\">ObjectInputValidation<\/code>\u63a5\u53e3<\/p>\n\n<h2 id=\"77\u5bf9\u4e8e\u5b9e\u4f8b\u7684\u63a7\u5236\u679a\u4e3e\u7c7b\u578b\u4f18\u5148\u4e8ereadresolve\"><code class=\"language-plaintext highlighter-rouge\">77<\/code>.\u5bf9\u4e8e\u5b9e\u4f8b\u7684\u63a7\u5236\uff0c\u679a\u4e3e\u7c7b\u578b\u4f18\u5148\u4e8ereadResolve<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5728\u53cd\u5e8f\u5217\u5316\u4e4b\u540e\uff0c\u65b0\u5efa\u5bf9\u8c61\u4e0a\u7684readResolve\u65b9\u6cd5\u5c06\u88ab\u8c03\u7528\uff0c\u7136\u540e\u8be5\u65b9\u6cd5\u8fd4\u56de\u7684\u5bf9\u8c61\u5c06\u53d6\u4ee3\u65b0\u5efa\u7684\u5bf9\u8c61<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.\u5982\u679c\u4f9d\u8d56readObject\u8fdb\u884c\u5b9e\u4f8b\u63a7\u5236\uff0c\u5e26\u6709\u5bf9\u8c61\u7c7b\u578b\u7684\u6240\u6709\u5b9e\u4f8b\u57df\u5fc5\u987b\u58f0\u660e\u4e3atransient\u7684<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">3<\/code>.\u7528readResolve\u8fdb\u884c\u5b9e\u4f8b\u63a7\u5236\u5e76\u4e0d\u8fc7\u65f6\uff0c\u5982\u679c\u5fc5\u987b\u7f16\u5199\u53ef\u5e8f\u5217\u5316\u7684\u5b9e\u4f8b\u53d7\u63a7\u7684\u7c7b\uff0c\u5b83\u7684\u5b9e\u4f8b\u5728\u7f16\u8bd1\u65f6\u8fd8\u4e0d\u77e5\u9053\uff0c\u4f60\u5c31\u65e0\u6cd5\u5c06\u7c7b\u8868\u793a\u6210\u679a\u4e3e<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">4<\/code>.\u5982\u679c\u628areadResolve\u653e\u5728\u4e00\u4e2a<strong>final<\/strong>\u7c7b\u4e0a\uff0c\u5b83\u5c31\u5e94\u8be5\u662f<strong>\u79c1\u6709<\/strong>\u7684\uff1b\u5982\u679creadResolve\u65b9\u6cd5\u4e0d\u662f\u79c1\u6709\u7684\uff0c\u5e76\u4e14\u5b50\u7c7b\u6ca1\u6709\u8986\u76d6\u5b83\uff0c\u5bf9\u5e8f\u5217\u5316\u8fc7\u7684\u5b50\u7c7b\u8fdb\u884c\u53cd\u5e8f\u5217\u5316\uff0c\u5c06\u4f1a\u83b7\u5f97\u4e00\u4e2a<strong>\u8d85\u7c7b<\/strong>\u7684\u5b9e\u4f8b\uff0c\u53ef\u80fd\u51fa\u73b0ClassCastException<\/p>\n\n<h2 id=\"78\u8003\u8651\u7528\u5e8f\u5217\u5316\u4ee3\u7406\u4ee3\u66ff\u5e8f\u5217\u5316\u5b9e\u4f8b\"><code class=\"language-plaintext highlighter-rouge\">78<\/code>.\u8003\u8651\u7528\u5e8f\u5217\u5316\u4ee3\u7406\u4ee3\u66ff\u5e8f\u5217\u5316\u5b9e\u4f8b<\/h2>\n\n<p><code class=\"language-plaintext highlighter-rouge\">1<\/code>.\u5b9e\u9645\u5728\u6d41\u4e4b\u95f4\u4f20\u8f93\u7684\u662f\u4ee3\u7406\u5bf9\u8c61\uff0c\u53cd\u5e8f\u5217\u5316\u4e4b\u540e\uff0c\u4ee3\u7406\u5bf9\u8c61\u901a\u8fc7<code class=\"language-plaintext highlighter-rouge\">readResolve<\/code>\u8fd4\u56de\u5bf9\u8c61\uff0c\u6b64\u65f6\u901a\u8fc7\u6784\u9020\u5668\u521b\u5efa\u5916\u56f4\u5bf9\u8c61\uff0c\u6784\u9020\u5668\u4e2d\u81ea\u5e26\u53c2\u6570\u68c0\u67e5\uff1b\u5e8f\u5217\u5316\u65f6\uff0c\u5916\u56f4\u7c7b\u901a\u8fc7<code class=\"language-plaintext highlighter-rouge\">writeReplace<\/code>\u8fd4\u56de\u5e8f\u5217\u5316\u4ee3\u7406\u5b9e\u4f8b\u3002<\/p>\n\n<p><code class=\"language-plaintext highlighter-rouge\">2<\/code>.writeReplace\u65b9\u6cd5\u5c06\u5728\u5bf9\u8c61\u88ab\u5199\u5165\u6d41\u4e4b\u524d\u6267\u884c\uff0c\u7136\u540e\u7528\u65b9\u6cd5\u8fd4\u56de\u7684\u5b9e\u4f8b\u66ff\u6362\u81ea\u8eab\u88ab\u5199\u5165\u6d41\u4e2d\uff0c\u4e0ereadResolve\u76f8\u5bf9<\/p>\n","pubDate":"Tue, 26 Nov 2013 00:00:00 +0000","link":"https:\/\/bit-ranger.github.io\/blog\/java\/effective-java\/","guid":"https:\/\/bit-ranger.github.io\/blog\/java\/effective-java\/","category":["Effective","Java","Java"]}]}}