Java中Json与String互转

1、引入依赖（如果非maven管理，也可手动下载相关jar包）

    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.58</version>
    </dependency>

2、示例代码

public class App { public static void main( String[] args ) { User user1 = new User("小明","123"); User user2 = new User("小李","123"); //1、List 转 Json
        List<User>list = new ArrayList<>(); list.add(user1); list.add(user2); String listToString = JSON.toJSONString(list); System.out.println("--------List转Json--------"); System.out.println(listToString); //4、Json转List
        List<User> jsonToList = JSONArray.parseArray(listToString, User.class); System.out.println("--------Json转List--------"); for(int i = 0; i < jsonToList.size(); i++){ System.out.println(jsonToList.get(i)); } } }