引包

import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import com.amazonaws.util.json.JSONObject;

ArrayList是数组，对应格式为[];

Map是key,value对，对应格式为{key=value}

jsonobject也为key,value对，对应格式为{key：value}

实例1:ArrayList数组里面是Map键值对，实例代码如下

@Test	public void testUpsert() {	    ArrayList
     
       arrayList = new ArrayList
      
       ();        JSONObject jsonObject=new JSONObject();        ArrayList
       
         arrayListNew = new ArrayList
        
         ();        Map
         
           map=new HashMap
          
           (); arrayList.add("天王盖地虎"); arrayList.add("宝塔镇河妖"); arrayList.add("野鸡闷头钻"); arrayList.add("哪能上天王山"); for(String elem:arrayList){ map.put("黑话", elem); arrayListNew.add(map.toString()); } System.out.println(arrayListNew); } }
          
         
        
       
      
     

　　打印结果如下;

[{黑话=天王盖地虎}, {黑话=宝塔镇河妖}, {黑话=野鸡闷头钻}, {黑话=哪能上天王山}]　　

实例2.ArrayList数组里面是jsonObject键值对，实例代码如下

@Test	public void testUpsert() throws JSONException {	    ArrayList
     
       arrayList = new ArrayList
      
       ();        JSONObject jsonObject=new JSONObject();        ArrayList
       
         arrayListNew = new ArrayList
        
         ();        Map
         
           map=new HashMap
          
           (); arrayList.add("天王盖地虎"); arrayList.add("宝塔镇河妖"); arrayList.add("野鸡闷头钻"); arrayList.add("哪能上天王山"); for(String elem:arrayList){ jsonObject.put("黑话", elem); arrayListNew.add(jsonObject.toString()); } System.out.println(arrayListNew); }}
          
         
        
       
      
     

　　打印结果如下;

[{"黑话":"天王盖地虎"}, {"黑话":"宝塔镇河妖"}, {"黑话":"野鸡闷头钻"}, {"黑话":"哪能上天王山"}]