JSONObject，JSONArray使用手冊

這兩個是官網的API

JSONObject API

JSONArray API

</blockquote>

里面有這兩個類的所有方法，是不可多得的好材料哦~

配合上面的API，大家再看下這段代碼，就會大有收獲了~

    import net.sf.json.JSONArray;

    import net.sf.json.JSONObject;

    import java.util.*;

    /**


 *  
 * @author derek  
 */    
public class JavaTest {    
    public static void main(String[] args){      
       JSONObject obj=new JSONObject();    
       obj.put("derek","23");    
       obj.put("dad", "49");    
       obj.put("mom", "45");    
       System.out.println("通過構造器的方式創建的JSONObject對象："+obj);    

       Map<String,String> map=new LinkedHashMap<>();    
       map.put("derek","23");    
       map.put("dad", "49");    
       map.put("mom", "45");    
       System.out.println("通過fromObject方法將map對象轉換為JSONObject對象："+JSONObject.fromObject(map));    

       JSONArray arr=new JSONArray();    
       arr.add(0,"derek");    
       arr.add(1,"dad");    
       arr.add(2,"mom");    
       System.out.println("通過構造器的方式創建的JSONArray："+arr);    

       ArrayList<String> list=new ArrayList<>();    
       list.add("derek");    
       list.add("dad");    
       list.add("mom");    
       System.out.println("通過fromObject方法將Arraylist對象轉換為JSONArray對象："+JSONArray.fromObject(list));    

       System.out.println("將HashMap對象通過fromObject方法轉換為JSONArray對象"+JSONArray.fromObject(map));    

       String str="{\"derek\":23,\"dad\":49,\"mom\":45}";    
       System.out.println("解析之后的JSON對象："+JSONObject.fromObject(str));    

       //遍歷輸出    
       Iterator<String> it=obj.keys();    
       while(it.hasNext()){    
           String key=it.next();    
           System.out.println(key+":"+obj.get(key));    
       }    
    }    

}    </pre> <p style="padding-bottom:0px;line-height:26px;margin-top:0px;font-family:Arial;margin-bottom:0px;font-size:14px;padding-top:0px;">運行結果如下：</p>

通過構造器的方式創建的JSONObject對象：{"derek":"23","dad":"49","mom":"45"}

通過fromObject方法將map對象轉換為JSONObject對象：{"derek":"23","dad":"49","mom":"45"}

通過構造器的方式創建的JSONArray：["derek","dad","mom"]

通過fromObject方法將Arraylist對象轉換為JSONArray對象：["derek","dad","mom"]

將HashMap對象通過fromObject方法轉換為JSONArray對象[{"derek":"23","dad":"49","mom":"45"}]

解析之后的JSON對象：{"derek":23,"dad":49,"mom":45}

derek:23

dad:49

mom:45


來自：http://blog.csdn.net/exceptional_derek/article/details/18727489