Json字符串格式化转成java实体类

问题描述：

最近遇到一个问题，实体类对象被转成json字符串后，发送到消息队列时，该字符串中的双引号被转意，转意后的字符串如何转成java对象呢？被转意后的字符串如下：

"{\"messageId\":\"ab3f9fcfe9c9432496dc6304e4085213\",\"result\":{\"key1\":1,\"key2\":2}}"

目标

本文实现将实体类转成json字符串，再讲json字符串解析封装成实体类对象的过程。

package test;


import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import entity.MqInfo;

import java.util.HashMap;
import java.util.Map;

public class TempTest {
    public static void main(String[] args) {
        Map<String,Object> map = new HashMap<String,Object>();
        map.put("k1",1);
        map.put("k2",2);
        Map<String,Object> message = new HashMap<String,Object>();
        message.put("result",map);
        //封装消息
        MqInfo mqInfo = new MqInfo("5e9bdca610b8404f83597f18172d4832",message);
        //将消息转成json串
        String jsonStr = JSONObject.toJSONString(mqInfo);

        //json解析，注意此处必须转成 JSONObject，后面才可以转成java对象
        JSONObject  parse = JSONObject.parseObject(jsonStr);
        MqInfo mqInfo1 = JSON.toJavaObject(parse, MqInfo.class);
        System.out.println(parse);
        System.out.println(mqInfo1);
    }

}

package entity;

import java.util.Map;

public class MqInfo {
    private String messageId;

    private Map<String,Object> result;

    public String getMessageId() {
        return messageId;
    }

    public void setMessageId(String messageId) {
        this.messageId = messageId;
    }

    public Map<String, Object> getResult() {
        return result;
    }

    public void setResult(Map<String, Object> result) {
        this.result = result;
    }

    public MqInfo() {
    }

    public MqInfo(String messageId, Map<String, Object> result) {
        this.messageId = messageId;
        this.result = result;
    }

    @Override
    public String toString() {
        return "MqInfo{" +
                "messageId=" + messageId +
                ", result=" + result +
                '}';
    }
}

后台输出结果

{"result":{"result":{"k1":1,"k2":2}},"messageId":"5e9bdca610b8404f83597f18172d4832"}

MqInfo{messageId=5e9bdca610b8404f83597f18172d4832, result={result={"k1":1,"k2":2}}}

本文地址：https://blog.csdn.net/zxjdC/article/details/110225516