support readMillis as int32, for issue #3471

wenshao · wenshao · commit f5c0b6287e2c · 2025-04-02T08:54:51.000+08:00
diff --git a/core/src/main/java/com/alibaba/fastjson2/JSONReaderJSONB.java b/core/src/main/java/com/alibaba/fastjson2/JSONReaderJSONB.java
@@ -3669,6 +3669,10 @@ private int readInt32Value0(byte[] bytes, byte type) {
                 }
                 return decimal.intValue();
             }
+            case BC_TIMESTAMP_MILLIS:
+                long millis = getLongBE(bytes, check7(offset, end));
+                offset += 8;
+                return (int) millis;
             default:
                 if (type >= BC_STR_ASCII_FIX_MIN && type <= BC_STR_ASCII_FIX_MAX) {
                     int strlen = type - BC_STR_ASCII_FIX_MIN;
diff --git a/core/src/test/java/com/alibaba/fastjson2/issues_3400/Issue3471.java b/core/src/test/java/com/alibaba/fastjson2/issues_3400/Issue3471.java
@@ -0,0 +1,45 @@
+package com.alibaba.fastjson2.issues_3400;
+
+import com.alibaba.fastjson2.JSONB;
+import com.alibaba.fastjson2.JSONReader;
+import com.alibaba.fastjson2.JSONWriter;
+import org.junit.jupiter.api.Test;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+public class Issue3471 {
+    @Test
+    public void test() throws Exception {
+        byte[] jsonBytes = JSONB.toBytes(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse("2025-04-01 12:47:10"),
+                JSONWriter.Feature.WriteClassName,
+                JSONWriter.Feature.FieldBased,
+                JSONWriter.Feature.ErrorOnNoneSerializable,
+                JSONWriter.Feature.ReferenceDetection,
+                JSONWriter.Feature.WriteNulls,
+                JSONWriter.Feature.NotWriteDefaultValue,
+                JSONWriter.Feature.NotWriteHashMapArrayListClassName,
+                JSONWriter.Feature.WriteNameAsSymbol);
+        JSONB.parseObject(jsonBytes, byte.class,
+                JSONReader.Feature.UseDefaultConstructorAsPossible,
+                JSONReader.Feature.ErrorOnNoneSerializable,
+                JSONReader.Feature.IgnoreAutoTypeNotMatch,
+                JSONReader.Feature.UseNativeObject,
+                JSONReader.Feature.FieldBased);
+        jsonBytes = JSONB.toBytes(new Date(),
+                JSONWriter.Feature.WriteClassName,
+                JSONWriter.Feature.FieldBased,
+                JSONWriter.Feature.ErrorOnNoneSerializable,
+                JSONWriter.Feature.ReferenceDetection,
+                JSONWriter.Feature.WriteNulls,
+                JSONWriter.Feature.NotWriteDefaultValue,
+                JSONWriter.Feature.NotWriteHashMapArrayListClassName,
+                JSONWriter.Feature.WriteNameAsSymbol);
+        JSONB.parseObject(jsonBytes, byte.class,
+                JSONReader.Feature.UseDefaultConstructorAsPossible,
+                JSONReader.Feature.ErrorOnNoneSerializable,
+                JSONReader.Feature.IgnoreAutoTypeNotMatch,
+                JSONReader.Feature.UseNativeObject,
+                JSONReader.Feature.FieldBased);
+    }
+}

Original file line number	Diff line number	Diff line change
`@@ -3669,6 +3669,10 @@ private int readInt32Value0(byte[] bytes, byte type) {`
`3669`	`3669`	`}`
`3670`	`3670`	`return decimal.intValue();`
`3671`	`3671`	`}`
	`3672`	`+ case BC_TIMESTAMP_MILLIS:`
	`3673`	`+ long millis = getLongBE(bytes, check7(offset, end));`
	`3674`	`+ offset += 8;`
	`3675`	`+ return (int) millis;`
`3672`	`3676`	`default:`
`3673`	`3677`	`if (type >= BC_STR_ASCII_FIX_MIN && type <= BC_STR_ASCII_FIX_MAX) {`
`3674`	`3678`	`int strlen = type - BC_STR_ASCII_FIX_MIN;`