使用fastjson将对象和字符串进行转换
依赖包：
<dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.54</version> </dependency>
范例代码：
1 package org.study2.tools.json.fastjson; 2 3 import com.alibaba.fastjson.JSON; 4 import org.study2.bean.User; 5 6 import java.util.ArrayList; 7 import java.util.List; 8 9 /** 10 * @Description: 使用fastjson将对象和字符串进行转换 11 **/ 12 public class FastjsonDemo { 13 14 public static void main(String[] args) { 15 // 测试数据 16 User userDemo = new User("tom", 25, "NO.1 street"); 17 String jsonStr = "{\"name\":\"Lily\",\"age\":33,\"address\":\"NO.2 street\"}"; 18 // json转JavaBean 19 User user1 = JSON.parseObject(jsonStr, User.class); 20 System.out.println("1、json转JavaBean：" + user1); 21 22 // JavaBean转json 23 String jsonUser = JSON.toJSONString(userDemo); 24 System.out.println("2、JavaBean转json：" + jsonUser); 25 26 // 将对象集合转换成为字符串 27 List<User> list = new ArrayList<>(); 28 list.add(user1); 29 list.add(userDemo); 30 String jsonUsers = JSON.toJSONString(list); 31 System.out.println("3、将对象集合转换成为字符串：" + jsonUsers); 32 33 // 将字符串转换成为对象集合 34 List<User> usersList = JSON.parseArray(jsonUsers,User.class); 35 System.out.println("4、将字符串转换成为对象集合：" + usersList); 36 37 } 38 39 }
运行结果：
1、json转JavaBean：User[name='Lily', age=33, address='NO.2 street']
2、JavaBean转json：{"address":"NO.1 street","age":25,"name":"tom"}
3、将对象集合转换成为字符串：[{"address":"NO.2 street","age":33,"name":"Lily"},{"address":"NO.1 street","age":25,"name":"tom"}]
4、将字符串转换成为对象集合：[User[name='Lily', age=33, address='NO.2 street'], User[name='tom', age=25, address='NO.1 street']]
