将数组按照一定的规则排序最简单的方法就是借助Arrays类的sort方法,那么要实现List集合排序的排序最简单的方式又是什么呢?当然是借助Collections类的sort方法,下面以一个例子来说明如何使用该方法实现List集合的排序:
代码一:
package com.ghj.packageofvo; public class User { private String name; //姓名 private String birthday;//出生日期 public User(String name, String birthday) { this.name = name; this.birthday = birthday; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getBirthday() { return birthday; } public void setBirthday(String birthday) { this.birthday = birthday; } }
代码二:
package com.ghj.packageofclient; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.List; import com.ghj.packageofvo.User; public class Client{ public static void main(String[] args) { List<User> userList = new ArrayList<User>(); userList.add(new User("王琦", "2014-03-28 10:00:24")); userList.add(new User("刘明", "2014-06-20 09:10:55")); userList.add(new User("张国龙", "2014-06-12 09:05:40")); userList.add(new User("刘青", "2014-05-23 13:37:02")); userList.add(new User("费楠", "2014-04-22 09:41:46")); userList.add(new User("王国栋", "2014-05-19 15:35:31")); Collections.sort(userList, new Comparator<User>(){ @Override public int compare(User a, User b) {//将List依照出生日期倒序排序 return b.getBirthday().compareTo(a.getBirthday()); } }); for (User user:userList) { System.err.println("姓名:" + user.getName() + ",出生日期:" + user.getBirthday()); } } }
运行结果:
时间: 2024-11-04 22:09:11