import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
public class JsonTest {
public static void main(String[] args) {
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");
// 输出jsonobject对象
System.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();
System.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");
System.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");
System.out.println(jsonObject);
System.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"]}
System.out.println("=====结果:" + jsonObject);
// 根据key返回一个字符串
String username = jsonObject.getString("username");
System.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
System.out.println("=====qq:" + object.get("QQ"));
}
}
输出结果：
=====jsonObject：{"username":"huangwuyi","sex":"男","QQ":"413425430","Min.score":99,"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","sex":"男","QQ":"413425430","Min.score":99,"nickname":"梦中心境","address":"福建省厦门市"}
{"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"]}
=====返回一个JSONArray对象：["this is a jsonArray value","another jsonArray value"]
=====结果:{"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"]}
=====username:huangwuyi
=====qq:413425430import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
public class JsonObjectTest {
/**
* @param args
*/
public static 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");
System.out.println("jsonObj0:" + jsonObj0);
// 创建jsonObj1
jsonObj.put("name", "xuwei");
jsonObj.put("sex", "male");
System.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);
System.out.println("jsonObj2:" + jsonObj2);
// 创建jsonObj3，只有一个条目，内容为jsonObj2
jsonObj3.element("j3", jsonObj2);
System.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);
System.out.println("jsonArray:" + jsonArray);
JSONObject jsonObj4 = new JSONObject();
jsonObj4.element("weather", jsonArray);
System.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","sex1":"female"},"item1":{"name":"xuwei","sex":"male"}}}
jsonArray:[{"name":"xuwei","sex":"male"}]
jsonObj4:{"weather":[{"name":"xuwei","sex":"male"}]}
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原文地址：http://blog.csdn.net/xu758142858/article/details/46755175
