JavaBean到JSon格式的转换例子

JavaBean到JSon格式的转换功能，依赖JSON的Jar包文件，现有JSON的Jar包文件以及小例子。

User u = new User();
		u.setId(1);
		u.setName("lizhi");
		u.setAge(24);
		u.setHeigh("178cm");
		u.setPassword("lizhi@0324");
		//Bean
		User u2 = new User();
		u2.setId(2);
		u2.setName("lizhi2");
		u2.setAge(22);
		u2.setHeigh("1782cm");
		u2.setPassword("lizhi@03242");
		JSONObject json = JSONObject.fromObject(u);
		System.out.println(json.toString()); // 结果为：{"age":24,"heigh":"178cm","id":1,"name":"lizhi","password":"lizhi@0324"}
		// List
		List<Object> list = new ArrayList<Object>();
		list.add(u);
		list.add(u2);
		JSONArray jsonList = JSONArray.fromObject(list);
		System.out.println(jsonList.toString()); // 结果为：[{"age":24,"heigh":"178cm","id":1,"name":"lizhi","password":"lizhi@0324"},{"age":22,"heigh":"1782cm","id":2,"name":"lizhi2","password":"lizhi@03242"}]
		//Map
		HashMap<String, Comparable> map = new HashMap<String, Comparable>();
		map.put("name", "hzucmj");
		map.put("age", 22);
		JSONObject jsonMap = JSONObject.fromObject(map);
		System.out.println(jsonMap.toString()); //结果为：{"age":22,"name":"hzucmj"}