JSONOject.parseObject(String str,目標對象.class);//把json串轉為對象

JSONOject.toJSONString(object);//把object轉換為Json串。

http://www.cnblogs.com/free-dom/p/5801866.html

創建一個實體類Student

public class Student {
//姓名
private String name;
//年齡
private String age;
//住址
private String address;
public String getName() {
return name;
}
public
 
 void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return "Student [name=" + name + ", age=" + age + ", address="
+ address + "]";
}

}
 

下面寫一個方法用來將student對象轉換為json

public static void convertObject() {
        
        Student stu=new Student();
        stu.setName("JSON");
        stu.setAge("23");
        stu.setAddress("北京市西城區");

        //1、使用JSONObject
        JSONObject json = JSONObject.fromObject(stu);
        //2、使用JSONArray
        JSONArray array=JSONArray.fromObject(stu);
        
        String strJson
 
=json.toString();
        String strArray=array.toString();
        
        System.out.println("strJson:"+strJson);
        System.out.println("strArray:"+strArray);
    }

JSONObject與JSONArray方法打印結果如下：

strJson:{"address":"北京市西城區","age":"23","name":"JSON"}
strArray:[{"address":"北京市西城區","age":"23","name":"JSON"}]

JSONArray jsonArray=JSONArray.fromObject(arrstr);
//獲得json數組的第一個元素
Object o = jsonArray.get(0);
JSONObject jsonObject = JSONObject.fromObject(o);
Student stu = (Student)JSONObject.toBean(jsonObject,Student.class);

JSON---java對象轉化