使用fastjson实现对象与json互转

使用fastjson实现对象与json互转

fastjson是阿里的一个json转换工具

1. 添加依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns=".0.0"xmlns:xsi=""xsi:schemaLocation=".0.0 .0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.kun</groupId><artifactId>jsonTest</artifactId><version>1.0-SNAPSHOT</version><dependencies><!-- .alibaba/fastjson --><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.75</version></dependency></dependencies></project>

2. 新建一个实体类

package ity;public class User {private Integer id;private String name;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}@Overridepublic String toString() {return "User{" +"id=" + id +", name='" + name + ''' +'}';}
}

3. 对象转json

package st;import com.alibaba.fastjson.JSON;
import ity.User;public class Test1 {public static void main(String[] args) {User user = new User();user.setId(1);user.setName("小明");//将对象转为jsonString userJson = JSONString(user);System.out.println(userJson);}
}

4. json转对象

package st;import com.alibaba.fastjson.JSON;
import ity.User;public class Test2 {public static void main(String[] args) {String json = "{"id":1,"name":"小明"}";User user = JSON.parseObject(json, User.class);System.out.println(user);}
}