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