json转换为javabean

    public static void jSONObjectToJavaBean() throws ClassCastException{
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("id", 1);
        jsonObject.put("name", "杨文培");
        jsonObject.put("sex", "男");
        jsonObject.put("age", null);//如果是null字符串应该表示为"'null'";int时null默认为0
        jsonObject.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");
        jsonObject.put("hobby", list);
        jsonObject.put("boo", false);
        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());
        }
    }

 map转换：

    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());
        }
    }