map创建JSONObject对象

 1     public static void mapToJSONObject(){
 2         Map<String, Object> map = new HashMap<String,Object>();
 3         map.put("id", 1);
 4         map.put("name", "杨文培");
 5         map.put("sex", null);
 6         map.put("age", 23);
 7         map.put("birthday", "1993-01-23");
 8         List<String> list = new ArrayList<String>();
 9         list.add("篮球");
10         list.add("乒乓球");
11         list.add("羽毛球");
12         map.put("hobby", list);
13         map.put("boo", false);
14         JSONObject jsonObject = JSONObject.fromObject(map);
15         System.out.println("map.toString()="+map.toString());
16         System.out.println("jsonObject.toString()="+jsonObject.toString());
17         try{
18             Student student = (Student) JSONObject.toBean(jsonObject,Student.class);
19             System.out.println("student="+student);
20         }catch(ClassCastException exception){
21             System.err.println("exception="+exception.getMessage());
22         }
23     }