引入pom依赖

   	<dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.67</version></dependency>

List转JSON

   List<String> stringList = new ArrayList<>();String json = JSONObject.toJSONString(stringList);

JSON转List

   String json = "";String json = JSONObject.parseArray(json, String.class);

JSON转Java对象

   List<User> userList = new ArrayList<>();String json = JSONObject.toJSONString(userList);

Java对象转JSON

   User user = new User();String json = JSONObject.parseArray(user, User.class);