JSONObject與JSONArray的應用。本站提示廣大學習愛好者:(JSONObject與JSONArray的應用)文章只能為提供參考,不一定能成為您想要的結果。以下是JSONObject與JSONArray的應用正文
1.JAR包簡介
要使法式可以運轉必需引入JSON-lib包,JSON-lib包同時依附於以下的JAR包:
1.commons-lang.jar
2.commons-beanutils.jar
3.commons-collections.jar
4.commons-logging.jar
5.ezmorph.jar
6.json-lib-2.2.2-jdk15.jar
2.JSONObject對象應用
JSON-lib包是一個beans,collections,maps,java arrays 和XML和JSON相互轉換的包。在本例中,我們將應用JSONObject類創立JSONObject對象,然後我們打印這些對象的值。為了應用JSONObject對象,我們要引入"net.sf.json"包。為了給對象添加元素,我們要應用put()辦法。
2.1.實例1
package jsontest;import net.sf.json.JSONArray;import net.sf.json.JSONObject;public class JSONObjectSample { // 創立JSONObject對象 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", "夢中間境"); return jsonObject; } public static void main(String[] args) { JSONObject jsonObject = JSONObjectSample.createJSONObject();//靜待辦法,直接經由過程類名+辦法挪用 // 輸入jsonobject對象 System.out.println("jsonObject:" + jsonObject); // 判讀輸入對象的類型 boolean isArray = jsonObject.isArray(); boolean isEmpty = jsonObject.isEmpty(); boolean isNullObject = jsonObject.isNullObject(); System.out.println("能否為數組:" + isArray + ", 能否為空:" + isEmpty + ", isNullObject:" + isNullObject); // 添加屬性,在jsonObject前面追加元素。 jsonObject.element("address", "福建省廈門市"); System.out.println("添加屬性後的對象:" + jsonObject); // 前往一個JSONArray對象 JSONArray jsonArray = new JSONArray(); jsonArray.add(0, "this is a jsonArray value"); jsonArray.add(1, "another jsonArray value"); jsonObject.element("jsonArray", jsonArray); //在jsonObject前面住家一個jsonArray JSONArray array = jsonObject.getJSONArray("jsonArray"); System.out.println(jsonObject); System.out.println("前往一個JSONArray對象:" + array); // 添加JSONArray後的值 // {"username":"huangwuyi","sex":"男","QQ":"413425430","Min.score":99,"nickname":"夢中間境","address":"福建省廈門市","jsonArray":["this is a jsonArray value","another jsonArray value"]} System.out.println("成果=" + jsonObject); // 依據key前往一個字符串 String username = jsonObject.getString("username"); System.out.println("username==>" + username); // 把字符轉換為 JSONObject String temp = jsonObject.toString(); JSONObject object = JSONObject.fromObject(temp); // 轉換後依據Key前往值 System.out.println("qq=" + object.get("QQ")); }}
輸入成果
jsonObject:{"username":"huangwuyi","sex":"男","QQ":"413425430","Min.score":99,"nickname":"夢中間境"}
能否為數組:false,
能否為空:false,
isNullObject:false添加屬性後的對象:
{"username":"huangwuyi",
"sex":"男",
"QQ":"413425430",
"Min.score":99,"nickname":"夢中間境",
"address":"福建省廈門市"}
{"username":"huangwuyi","sex":"男","QQ":"413425430","Min.score":99,"nickname":"夢中間境",
"address":"福建省廈門市","jsonArray":["this is a jsonArray value","another jsonArray value"]}
前往一個JSONArray對象:["this is a jsonArray value","another jsonArray value"]
成果={"username":"huangwuyi","sex":"男",
"QQ":"413425430","Min.score":99,"nickname":"夢中間境","address":"福建省廈門市",
"jsonArray":["this is a jsonArray value",
"another jsonArray value"]}username==>huangwuyiqq=413425430
2.2.實例2.
package jsontest;import net.sf.json.JSONArray;import net.sf.json.JSONObject;public class JSONTest { 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(); //創立jsonObj0 jsonObj0.put("name0", "zhangsan"); jsonObj0.put("sex1", "female"); System.out.println("jsonObj0:"+jsonObj0); //創立jsonObj1 jsonObj.put("name", "xuwei"); jsonObj.put("sex", "male"); System.out.println("jsonObj:"+jsonObj); //創立jsonObj2,包括兩個條目,條目內容分離為jsonObj0,jsonObj1 jsonObj2.put("item0", jsonObj0); jsonObj2.put("item1", jsonObj); System.out.println("jsonObj2:"+jsonObj2); //創立jsonObj3,只要一個條目,內容為jsonObj2 jsonObj3.element("j3", jsonObj2); System.out.println("jsonObj3:"+jsonObj3); //往JSONArray中添加JSONObject對象。發明JSONArray跟JSONObject的差別就是JSONArray比JSONObject多中括號[] jsonArray.add(jsonObj); System.out.println("jsonArray:"+jsonArray); JSONObject jsonObj4 = new JSONObject(); jsonObj4.element("weather", jsonArray); System.out.println("jsonObj4:"+jsonObj4); }}
輸入成果:
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"}]}
以上所述是小編給年夜家引見的JSONObject與JSONArray的應用常識,願望對年夜家有所贊助,假如年夜家想懂得更多內容敬請存眷網站!