{"id":124053,"date":"2024-06-21T16:20:07","date_gmt":"2024-06-21T13:20:07","guid":{"rendered":"https:\/\/www.javacodegeeks.com\/?p=124053"},"modified":"2024-06-20T13:34:00","modified_gmt":"2024-06-20T10:34:00","slug":"spring-mockmvc-get-json-as-object","status":"publish","type":"post","link":"https:\/\/www.javacodegeeks.com\/spring-mockmvc-get-json-as-object.html","title":{"rendered":"Spring MockMVC Get JSON As Object"},"content":{"rendered":"

1. Introduction<\/h2>\n

Spring MockMVC<\/a> is the Spring MVC testing framework which performs Spring MVC request handling and response asserting via mocking request and response objects without a running HTTP server. @AutoConfigureMockMvc<\/a> is used to configure and a MockMVC<\/a> instance is injected into a test class. In this example, I will demonstrate Spring MockMVC fetch JSON by creating a simple Get Rest API and mocking the response via MockMVC and then converting the response string to an object via both Jackson<\/a> and GSON<\/a> libraries.<\/p>\n

2. Setup<\/h2>\n

In this step, I will create a gradle project with spring-boot-starter-web<\/code>, Jackson<\/code>, GSON<\/code>, Lombok<\/code>, and Junit<\/code> libraries.<\/p>\n

build.gradle<\/em><\/span><\/p>\n

plugins {\n\tid 'java'\n\tid 'org.springframework.boot' version '3.3.0'\n\tid 'io.spring.dependency-management' version '1.1.5'\n}\n\ngroup = 'com.zheng.demo.sbtest'\nversion = '0.0.1-SNAPSHOT'\n\njava {\n\ttoolchain {\n\t\tlanguageVersion = JavaLanguageVersion.of(17)\n\t}\n}\n\nconfigurations {\n  compileOnly {\n    extendsFrom annotationProcessor\n  }\n}\n\nrepositories {\n\tmavenCentral()\n}\n\ndependencies {\n\timplementation 'org.springframework.boot:spring-boot-starter-web'\n\t\n\tcompileOnly 'org.projectlombok:lombok'\n\tannotationProcessor 'org.projectlombok:lombok'\n\t\n\timplementation 'com.google.code.gson:gson:2.11.0'\n\t\n\ttestImplementation 'org.springframework.boot:spring-boot-starter-test'\n\ttestRuntimeOnly 'org.junit.platform:junit-platform-launcher'\n}\n\ntasks.named('test') {\n\tuseJUnitPlatform()\n}\n<\/pre>\n
3. Get Rest API<\/h2>\n
<\/a>3.1 MyRestController<\/h3>\n
In this step, I will create a MyRestController.java<\/code> class which has a Get<\/code> method to return a RestReturnData<\/code> ResponseEntity<\/code>.<\/p>\n
MyRestController.java<\/em><\/span><\/p>\n
package com.zheng.demo.sbtest.demo.rest;\n\nimport java.util.stream.IntStream;\n\nimport org.springframework.http.HttpStatus;\nimport org.springframework.http.ResponseEntity;\nimport org.springframework.web.bind.annotation.GetMapping;\nimport org.springframework.web.bind.annotation.RequestParam;\nimport org.springframework.web.bind.annotation.RestController;\n\nimport com.zheng.demo.sbtest.demo.data.RestReturnData;\n\n@RestController\npublic class MyRestController {\n\n\t@GetMapping(\"\/\")\n\tpublic ResponseEntity<RestReturnData> getJsonResponse(@RequestParam(\"input\") String input) {\n\t\tRestReturnData retD = new RestReturnData(IntStream.range(0, input.length()).map(n -> (n + 1) * 3).toArray(),\n\t\t\t\tinput.length(), input);\n\n\t\treturn new ResponseEntity<RestReturnData>(retD, HttpStatus.OK);\n\t}\n}\n<\/pre>\n