json转对象

1,引入依赖

   <dependency>
            <groupId>net.sf.json-lib</groupId>
            <artifactId>json-lib</artifactId>
            <version>2.4</version>
            <classifier>jdk15</classifier>
   </dependency>

2,

public static void jsonStrToJava(){
        //定义两种不同格式的字符串
        String objectStr="{"name":"JSON","age":"24","address":"北京市西城区"}";
        String arrayStr="[{"name":"JSON","age":"24","address":"北京市西城区"}]";
    
        //1、使用JSONObject
        JSONObject jsonObject=JSONObject.fromObject(objectStr);
        Student stu=(Student)JSONObject.toBean(jsonObject, Student.class);
        
        //2、使用JSONArray
        JSONArray jsonArray=JSONArray.fromObject(arrayStr);
        //获得jsonArray的第一个元素
        Object o=jsonArray.get(0);
        JSONObject jsonObject2=JSONObject.fromObject(o);
        Student stu2=(Student)JSONObject.toBean(jsonObject2, Student.class);
        System.out.println("stu:"+stu);
        System.out.println("stu2:"+stu2);
        
    }

打印结果为:

stu:Student [name=JSON, age=24, address=北京市西城区]
stu2:Student [name=JSON, age=24, address=北京市西城区]