JSONArray:["100","102","false"]
JSONArray中放入JSONObject:[{"0":100},{"1":101},{"2":102},{"3":103},{"4":104}]
JSONObject:{"2":329,"1":"str"}
多个JSONObject:{"1":{"3":"河东","2":"河北","1":"河南"},"0":{"3":"河东","2":"河北","1":"河南"}}
代码：
public static void main(String[] args) {
     //-------------JSONArray
  JSONArray ja = new JSONArray();
  ja.add("100");
  ja.add("102");
  ja.add("false");
  System.out.println(ja.toJSONString());
  //-------------JSONArray中放入JSONObject
  JSONArray jsonArray = new JSONArray();
  for(int i=0;i<5;i++){
   Map map1 = new HashMap();
   map1.put(i,i+100);
   JSONObject jo1=new JSONObject(map1);
      jsonArray.add(jo1);
  }
  System.out.println(jsonArray.toJSONString());
  //-------------JSONObject
  Map map = new HashMap();
  map.put("1","str");
  map.put("2",329);
  JSONObject jo = new JSONObject(map);
  System.out.println(jo.toJSONString());
  //-------------多个JSONObject
  JSONObject jo2 = new JSONObject();
  for(int i=0;i<2;i++){
   Map map1 = new HashMap();
   map1.put("1","河南");
   map1.put("2","河北");
   map1.put("3","河东");
   jo2.put(i,map1);
  }
  System.out.println(jo2.toJSONString());
}