JSONObject与JSONArray的使用

package jsontest;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

public class JSONObjectSample {

    // 创建JSONObject对象
    private static JSONObject createJSONObject() {
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("username","huangwuyi");
        jsonObject.put("sex","男");
        jsonObject.put("QQ","413425430");
        jsonObject.put("Min.score",new Integer(99));
        jsonObject.put("nickname","梦中心境");
        return jsonObject;
    }

    static void main(String[] args) {
        JSONObject jsonObject = JSONObjectSample.createJSONObject();静待方法，直接通过类名+方法调用
         输出jsonobject对象
        Sy@R_301_2407@.out.println("jsonObject：" + jsonObject);

         判读输出对象的类型
        Boolean isArray = jsonObject.isArray();
        Boolean isEmpty = jsonObject.isEmpty();
        Boolean isNullObject = jsonObject.isNullObject();
        Sy@R_301_2407@.out.println("是否为数组:" + isArray + "， 是否为空:" + isEmpty
                + "， isNullObject:" + isNullObject);

         添加属性，在jsonObject后面追加元素。
        jsonObject.element("address","福建省厦门市");
        Sy@R_301_2407@.out.println("添加属性后的对象：" + jsonObject);

         返回一个JSONArray对象
        JSONArray jsonArray = new JSONArray();
        jsonArray.add(0,"this is a jsonArray value");
        jsonArray.add(1,"another jsonArray value");
        jsonObject.element("jsonArray",jsonArray);
        在jsonObject后面住家一个jsonArray
        JSONArray array = jsonObject.getJSONArray("jsonArray");
        Sy@R_301_2407@.out.println(jsonObject);
        
        
        Sy@R_301_2407@.out.println("返回一个JSONArray对象：" + array);
         添加JSONArray后的值
         {"username":"huangwuyi","sex":"男","QQ":"413425430","Min.score":99,"nickname":"梦中心境","address":"福建省厦门市","jsonArray":["this is a jsonArray value","another jsonArray value"]}
        Sy@R_301_2407@.out.println("结果=" + jsonObject);

         根据key返回一个字符串
        String username = jsonObject.getString("username");
        Sy@R_301_2407@.out.println("username==>" + userName);

         把字符转换为 JSONObject
        String temp = jsonObject.toString();
        JSONObject object = JSONObject.fromObject(temp);
         转换后根据Key返回值
        Sy@R_301_2407@.out.println("qq=" + object.get("QQ"));

    }

}@H_674_175@ 
 
 
   
 
 

jsonObject：{"username":"huangwuyi","nickname":"梦中心境"}
是否为数组:false， 是否为空:false， isNullObject:false
添加属性后的对象：{"username":"huangwuyi","address":"福建省厦门市"}
{"username":"huangwuyi","another jsonArray value"]}
返回一个JSONArray对象：["this is a jsonArray value","another jsonArray value"]
结果={"username":"huangwuyi","another jsonArray value"]}
username==>huangwuyi
qq=413425430

class JSONTest {
void main(String args[])
{
JSONObject jsonObj0 = new JSONObject();
JSONObject jsonObj = new JSONObject();
JSONObject jsonobj2 = new JSONObject();
JSONObject jsonobj3 = new JSONObject();
JSONArray jsonArray = new JSONArray();

创建jsonObj0
jsonObj0.put("name0","zhangsan");
jsonObj0.put("sex1","female");
Sy@R_301_2407@.out.println("jsonObj0:"+jsonObj0);

创建jsonObj1
jsonObj.put("name","xuwei");
jsonObj.put("sex","male");
Sy@R_301_2407@.out.println("jsonObj:"+jsonObj);

创建jsonobj2，包含两个条目，条目内容分别为jsonObj0，jsonObj1
jsonobj2.put("item0",jsonObj0);
jsonobj2.put("item1",jsonObj);
Sy@R_301_2407@.out.println("jsonobj2:"+jsonobj2);

创建jsonobj3，只有一个条目，内容为jsonobj2
jsonobj3.element("j3",jsonobj2);
Sy@R_301_2407@.out.println("jsonobj3:"+jsonobj3);

往JSONArray中添加JSONObject对象。发现JSONArray跟JSONObject的区别就是JSONArray比JSONObject多中括号[]
jsonArray.add(jsonObj);
Sy@R_301_2407@.out.println("jsonArray:"+jsonArray);

JSONObject jsonObj4 = new JSONObject();
jsonObj4.element("weather",jsonArray);
Sy@R_301_2407@.out.println("jsonObj4:"+jsonObj4);
}
}

jsonObj0:{"name0":"zhangsan","sex1":"female"}
jsonObj:{"name":"xuwei","sex":"male"}
jsonobj2:{"item0":{"name0":"zhangsan","sex1":"female"},"item1":{"name":"xuwei","sex":"male"}}
jsonobj3:{"j3":{"item0":{"name0":"zhangsan","sex":"male"}}}
jsonArray:[{"name":"xuwei","sex":"male"}]
jsonObj4:{"weather":[{"name":"xuwei","sex":"male"}]}@H_674_175@