Android 解析JSON

Posted 2022-11-24 第三女神程忆难

安卓解析JSON

• JSON解析
• • GSON解析
  • FastJson解析

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JSON解析

1、Gson
2、FastJson
3、原生解析

解析以下字符串

	"code": 1024,
	"message": "Today is 1024",
	"data": 
		"name": "ThirdGoddess",
		"age": 18,
		"occupation": "android Developer"
	

对应Java实体类 PeopleEntity：

public class PeopleEntity 
    
    private int code;
    private String message;
    private Data data;

    public int getCode() 
        return code;
    

    public void setCode(int code) 
        this.code = code;
    

    public String getMessage() 
        return message;
    

    public void setMessage(String message) 
        this.message = message;
    

    public Data getData() 
        return data;
    

    public void setData(Data data) 
        this.data = data;
    

    public class Data 
        private String name;
        private int age;
        private String occupation;

        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 getOccupation() 
            return occupation;
        

        public void setOccupation(String occupation) 
            this.occupation = occupation;
        
    

---

GSON解析

推荐使用这种方式

build引入

// https://mvnrepository.com/artifact/com.google.code.gson/gson
implementation 'com.google.code.gson:gson:2.9.1'

Java代码：

package com.example.test;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import com.google.gson.Gson;

public class MainActivity extends AppCompatActivity 

    @Override
    protected void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        String jsonStr = "\\"code\\":1024,\\"message\\":\\"Today is 1024\\",\\"data\\":\\"name\\":\\"ThirdGoddess\\",\\"age\\":18,\\"occupation\\":\\"Android Developer\\"";

        //Gson解析
        PeopleEntity peopleEntity = new Gson().fromJson(jsonStr, PeopleEntity.class);

    

---

FastJson解析

一般后端使用FastJson解析

build.gradle引入

// https://mvnrepository.com/artifact/com.alibaba/fastjson
implementation 'com.alibaba:fastjson:2.0.16'

Java代码：

package com.example.test;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.google.gson.Gson;

public class MainActivity extends AppCompatActivity 

    @Override
    protected void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        String jsonStr = "\\"code\\":1024,\\"message\\":\\"Today is 1024\\",\\"data\\":\\"name\\":\\"ThirdGoddess\\",\\"age\\":18,\\"occupation\\":\\"Android Developer\\"";

        //FastJson解析
        JSONObject jsonObject = JSONObject.parseObject(jsonStr);
        jsonObject.getInteger("code");
        jsonObject.getString("message");

        //FastJson映射实体类
        PeopleEntity peopleEntity = JSON.parseObject(jsonStr, PeopleEntity.class);