JSON串转换映射成java对象

傷城~ 2022-04-06 12:20 370阅读 0赞

在工作中，经常会将JSON串转换映射成java对象，如下是fastjson和jsonLib将JSON串转换成JAVA对象的实例，特在此记录。

工程结构：

![f631ec6d-2fa4-3d1f-8d82-259a74485537.png][]

UserInfo.java

package com.bijian.test;
    
    public class UserInfo {
    
        private String name;
        private int age;
        private String address;
        
        public String getName() {
            return name;
        }
        public void setName(String name) {
            this.name = name;
        }
        public int getAge() {
            return age;
        }
        public void setAge(int age) {
            this.age = age;
        }
        public String getAddress() {
            return address;
        }
        public void setAddress(String address) {
            this.address = address;
        }
        @Override
        public String toString() {
            return "UserInfo [name=" + name + ", age=" + age + ", address=" + address + "]";
        }
    }

Main.java

package com.bijian.test;
    
    import com.alibaba.fastjson.JSON;
    
    import net.sf.json.JSONObject;
    
    public class Main {
        
        private static String jsonStr = "{\"name\":\"zhangshan\", \"age\": 10, \"address\": \"中国深圳\"}";
        
        public static void main(String[] args) {
            
            //JSON-LIB
            JSONObject jsonResult = JSONObject.fromObject(jsonStr);
            UserInfo userInfo = (UserInfo)JSONObject.toBean(jsonResult, UserInfo.class);
            System.out.println("userInfo:" + userInfo);
            
            //fastjson
            com.alibaba.fastjson.JSONObject jsonObject = JSON.parseObject(jsonStr);
            UserInfo userInfo2 = com.alibaba.fastjson.JSONObject.toJavaObject(jsonObject, UserInfo.class);
            System.out.println("userInfo2:" + userInfo2);
        }
    }

运行结果：

userInfo:UserInfo [name=zhangshan, age=10, address=中国深圳]
    userInfo2:UserInfo [name=zhangshan, age=10, address=中国深圳]

当然，json-lib的使用坑可以进一步查看《JSONObject以及json串》一文了解。

[f631ec6d-2fa4-3d1f-8d82-259a74485537.png]: /images/20220406/d9a6d84391fe4d0b98adbc32728bdae8.png