排序（对对象进行排序）二

功能：通过java对对象按生日时间进行升序排序

代码块

User .java

package com.yubai;

/**
 * Created by bayu on 9/13/2017.
 */
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;
    }
}

SortClass .java

package com.yubai;

import java.util.Comparator;

/**
 * Created by bayu on 9/13/2017.
 */
public class SortClass implements Comparator{

    @Override
    public int compare(Object o1, Object o2) {
        User u1 = (User)o1;
        User u2 = (User)o2;
        return u1.getBirthday().compareTo(u2.getBirthday());
    }
}

UserTest .java

package com.yubai;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

/**
 * Created by bayu on 9/13/2017.
 */
public class UserTest {
    public static void main(String[] args) {
        List<User> userList = new ArrayList<User>();
        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 (User u:userList) {
            System.out.println(u.getName()+","+u.getSex()+","+u.getAge()+","+u.getBirthday());
        }

    }
}