Java基础(Json和Java对象)

定义好实体类

package com.pyb.pojo;
​
/*** @version 1.0* @Author 彭彦彬* @Date 2024/12/24 20:47* @注释*/
public class Person {private String username;private String password;
​public Person() {}
​public Person(String username, String password) {this.username = username;this.password = password;}
​public String getUsername() {return username;}
​public void setUsername(String username) {this.username = username;}
​public String getPassword() {return password;}
​public void setPassword(String password) {this.password = password;}
​@Overridepublic String toString() {return "Person{" +"username='" + username + '\'' +", password='" + password + '\'' +'}';}
}

1.Java对象转化为json对象

JSONObject jsonObject= (JSONObject) JSONObject.toJSON(new Person("pyb","123"));

• 打印输出结果

 

2.Java对象转化为json字符串

String jsonString=JSON.toJSONString(new Person("pyb","123"));

• 打印输出结果

3.json对象转化为Java对象

Person person=JSON.parseObject(jsonString,Person.class);

• 打印输出结果

 

4.json对象转化为json字符串

     System.out.println("Json字符串对象"+jsonObject.toString());

• 打印输出结果

 

5.json对象字符串转化为Java对象

Person persons=JSON.parseObject(jsonString,Person.class);

• 打印输出结果

6.json对象字符串转化json对象

JSONObject jsonObjects=JSONObject.parseObject(jsonString);

• 打印输出结果