用Java集合中的Collections.sort方法对list排序的两种方法
转自：http://www.open-open.com/lib/view/open1322614659562.html

public class Test{    public static void main(String[] args) {        User user1 = new User();        user1.setName("a");        user1.setOrder(1);        User user2 = new User();        user2.setName("b");        user2.setOrder(2);        List <user> list = new ArrayList<user> ();        //此处add user2再add user1        list.add(user2);        list.add(user1);        Collections.sort(list);        for(User u : list){            System.out.println(u.getName());        }    }}         </user>     </user>