json格式转换

jar包引用

<!-- fastjson -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.46</version>
</dependency>

<!--JSONObject.fromObject-->
<dependency>
    <groupId>net.sf.json-lib</groupId>
    <artifactId>json-lib</artifactId>
    <version>2.4</version>
    <classifier>jdk15</classifier>
</dependency>

Map转JSONObject

Map<String,Object> userMap = new HashMap<>();
userMap.put("id",2);
userMap.put("name","name");
JSONObject jsonParam = new JSONObject();
jsonParam.put("params", userMap);

Map转json对象

该方法引用的是json-lib包

JSONObject jsonObject = JSONObject.fromObject(data);

Map转Json字符串

String userBody = JSON.toJSONString(userMap);

Map格式Json字符串转Map

String resultBody = "一个Json字符串";
Map<String,Object> userResult= JSON.parseObject(resultBody,Map.class);

Json字符串转List

String loadData= "一个Json字符串";
List<Map> loadDataResult = JSONArray.parseArray(loadData,Map.class);

List转Json数组

JSONArray array= JSONArray.parseArray(JSON.toJSONString(varList));

实体转Json字符串

WebServiceResult webServiceResult = new WebServiceResult();
ObjectMapper mapper = new ObjectMapper();
String result = mapper.writeValueAsString(webServiceResult);