java collection.sort()根据时间排序list

首先：定义bean

然后：定义比较器

最后：测试使用

一.userBean

package com.butterfly.Class;



public class user {

    private String name;

    private String sex;

    private int age;

    private String birthday;

    

    public user(String name,String sex,int age,String birthday){

        this.name = name;

        this.sex = sex;

        this.age = age;

        this.birthday = birthday;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public String getSex() {

        return sex;

    }

    public void setSex(String sex) {

        this.sex = sex;

    }

    public int getAge() {

        return age;

    }

    public void setAge(int age) {

        this.age = age;

    }

    public String getBirthday() {

        return birthday;

    }

    public void setBirthday(String birthday) {

        this.birthday = birthday;

    }

    

    

}

二.定义比较器

 

package com.butterfly.Class;



import java.util.Comparator;



public class sortClass implements Comparator{

    public int compare(Object arg0,Object arg1){

        user user0 = (user)arg0;

        user user1 = (user)arg1;

        int flag = user0.getBirthday().compareTo(user1.getBirthday());

        return flag;

    }

}

三.测试使用

package com.butterfly.Class;



import java.util.ArrayList;

import java.util.Collections;

import java.util.List;



public class testClass {

    public static void main(String[] args){

        List userList = new ArrayList();

        userList.add(new user("吴光雷","男",25,"19871028"));

        userList.add(new user("吴桥","男",22,"19900923"));

        userList.add(new user("陆晓敏","男",25,"19870728"));

        userList.add(new user("王佳俊","男",23,"19890728"));

        userList.add(new user("秦菁","女",23,"19891212"));

        

        sortClass sort = new sortClass();

        Collections.sort(userList,sort);

        for(int i=0;i<userList.size();i++){

            user temp = (user)userList.get(i);

            System.out.println("姓名:"+temp.getName()+",生日:"+temp.getBirthday());

        }

    }

}

 输出结果：

姓名:陆晓敏,生日:19870728

姓名:吴光雷,生日:19871028

姓名:王佳俊,生日:19890728

姓名:秦菁,生日:19891212

姓名:吴桥,生日:19900923

出自：http://blog.csdn.net/learner9023/article/details/8432508