map创建JSONObject对象

     public static void mapToJSONObject(){
         Map<String, Object> map = new HashMap<String,Object>();
         map.put("id", 1);
         map.put("name", "杨文培");
         map.put("sex", null);
         map.put("age", 23);
         map.put("birthday", "1993-01-23");
         List<String> list = new ArrayList<String>();
         list.add("篮球");
         list.add("乒乓球");
         list.add("羽毛球");
         map.put("hobby", list);
         map.put("boo", false);
         JSONObject jsonObject = JSONObject.fromObject(map);
         System.out.println("map.toString()="+map.toString());
         System.out.println("jsonObject.toString()="+jsonObject.toString());
         try{
             Student student = (Student) JSONObject.toBean(jsonObject,Student.class);
             System.out.println("student="+student);
         }catch(ClassCastException exception){
             System.err.println("exception="+exception.getMessage());
         }
     }