Json解析工具类

Posted 2022-05-28 zhengjinsheng

这篇文章我是怀着无比激动的心情写得，为啥为啥？因为都要放假了！你们的小心心是不是已经躁动不安了！族长考虑到现在离高速免费通行还有几个小时，大家也闲来无事，在下就写点让小伙伴们打发打发时间！今天我们就看一点通过Gson-2.3.1.jar封装的工具类！希望有助于你（温馨提醒：别看的忘了游玩出行的时间哦~~）

 

工具类

 

package com.sunfreeter.util;


import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;

/**
 * 
 * @author freeter
 * @desc Json封装工具类简洁版
 */
public class JsonUtil 
    /**@author 订阅号：sunfreeter
     * @desc 对象转Json串
     * @param object
     * @return
     */
    public static String toString(Object object)
        String jsonString = new Gson().toJson(object);
        return jsonString;
    

    /**@author 订阅号：sunfreeter
     * @desc Json串转自定义对象
     * @param jsonString
     * @param object
     * @return
     */
    public static  <T> T stringToObject(String jsonString,Class<T> object)
         T toObject = new Gson().fromJson(jsonString,object);
        return toObject;
    

    public static JsonObject stringToJosnObject(String jsonString)
        JsonParser jsonParser = new JsonParser();
        JsonElement jsonElement = jsonParser.parse(jsonString);
        JsonObject jsonObject = jsonElement.getAsJsonObject();
        return jsonObject;
    

    public static String jsonObjectToJsonString(JsonObject jsonObject)
        return jsonObject.toString();
    

测试实体类-MyClass

package com.sunfreeter.model;

import java.util.List;

/**
 * 
 * @author sunfreeter
 * @desc 班级
 */
public class MyClass 
 private String code;
 private String name;
 private List<Student> students;
public String getCode() 
    return code;

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

public String getName() 
    return name;

public void setName(String name) 
    this.name = name;

public List<Student> getStudents() 
    return students;

public void setStudents(List<Student> students) 
    this.students = students;

测试实体类-Student

package com.sunfreeter.model;


/**
 * 
 * @author sunfreeter
 * @desc 学生
 */
public class Student 
 private String sno;
 private String sname;
 private int age;
public String getSno() 
    return sno;

public void setSno(String sno) 
    this.sno = sno;

public String getSname() 
    return sname;

public void setSname(String sname) 
    this.sname = sname;

public int getAge() 
    return age;

public void setAge(int age) 
    this.age = age;

测试主入口

package com.sunfreeter.app;

import java.util.ArrayList;
import java.util.List;

import com.google.gson.JsonObject;
import com.sunfreeter.model.MyClass;
import com.sunfreeter.model.Student;
import com.sunfreeter.util.JsonUtil;

/**
 * 
 * @author 订阅号：sunfreeter
 * @desc 测试主入口
 */
public class Test 

    public static void main(String[] args) 
        Student student=new Student();
        student.setSno("s_001");
        student.setSname("张三");
        student.setAge(20);

        Student student1=new Student();
        student1.setSno("s_002");
        student1.setSname("李四");
        student1.setAge(30);

        List<Student> list=new ArrayList<Student>();
        list.add(student);
        list.add(student1);
        MyClass mc=new MyClass();
        mc.setCode("c_0001");
        mc.setName("一年级");
        mc.setStudents(list);
        String ss=JsonUtil.toString(mc);
        System.out.println(ss);
        MyClass myClass = JsonUtil.stringToObject(ss, MyClass.class);
        System.out.println(myClass.getCode());


        JsonObject jsonObject= JsonUtil.stringToJosnObject(ss);
        System.out.println(jsonObject.get("code").getAsString());
        System.out.println(jsonObject.get("students").getAsJsonArray());
        String ddd = JsonUtil.jsonObjectToJsonString(jsonObject);
        System.out.println(ddd);