超市（未完成）

package com.day17;

public class Member {
    //姓名   会员卡号   密码   会员积分
    private String name;
    private int cardId;
    private String password;
    private int score;
    //开卡日期
    private String registDate;

    public Member() {
    }
    public Member(String name, int cardId, String password, int score) {
        this.name = name;
        this.cardId = cardId;
        this.password = password;
        this.score = score;
    }

    public Member(String name, int cardId, String password, int score,
                  String registDate) {
        super();
        this.name = name;
        this.cardId = cardId;
        this.password = password;
        this.score = score;
        this.registDate = registDate;
    }
    public String getRegistDate() {
        return registDate;
    }
    public void setRegistDate(String registDate) {
        this.registDate = registDate;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getCardId() {
        return cardId;
    }
    public void setCardId(int cardId) {
        this.cardId = cardId;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public int getScore() {
        return score;
    }
    public void setScore(int score) {
        this.score = score;
    }
}

package com.day17;

public class TestMember {
    public static void main(String[] args) {
        MemberDao dao=new MemberDao();
        dao.start();
    }
}

package com.day17;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Random;
import java.util.Scanner;


public class MemberDao {
    Scanner input = new Scanner(System.in);
    List<Member> memberList = new ArrayList<Member>();

    public void menu(){
        System.out.println("*************************欢迎进入超市会员管理系统*************************");
        System.out.println("1.积分累计       2.积分兑换       3.查询剩余积分       4.修改密码       5.开卡       6.退出");
        System.out.println("*******************************************************************");
        System.out.print("请选择：");
    }

    public void start(){
        do{
            menu();
            int choose = input.nextInt();
            switch(choose){
                case 1:
                    if (saveScore()) {
                        System.out.println("积分累计成功！");
                    } else {
                        System.out.println("积分累计失败！");
                    }
                    continue;
                case 2:
                    if (minusScore()) {
                        System.out.println("积分兑换成功！");
                    } else {
                        System.out.println("积分兑换失败！");
                    }
                    continue;
                case 3:
                    showScore();
                    continue;
                case 4:
                    if (changePwd()) {
                        System.out.println("密码修改成功！");
                    } else {
                        System.out.println("密码修改失败！");
                    }
                    continue;
                case 5:
                    register();
                    continue;
                case 6:
                    System.out.println("感谢您的使用，欢迎下次使用！");
                    break;
                default:
                    System.out.println("您的操作有误，请重新选择：");
                    continue;
            }
            break;
        }while(true);
    }

    //查询会员是否存在,会员密码不区分大小写
    public Member hasMember(Member member){
        if(member.getPassword()!=null){
            for (int i = 0; i < memberList.size(); i++) {
                if(memberList.get(i).getCardId()==member.getCardId() && memberList.get(i).getPassword().equalsIgnoreCase(member.getPassword())){
                    return memberList.get(i);
                }
            }
        }else{
            for (int i = 0; i < memberList.size(); i++) {
                if(memberList.get(i).getCardId()==member.getCardId()){
                    return memberList.get(i);
                }
            }
        }
        return null;
    }

    //修改会员密码
    public boolean changePwd(){
        Member member=new Member();
        System.out.print("请输入您的会员卡号：");
        member.setCardId(input.nextInt());
        System.out.print("请输入您的会员卡密码：");
        member.setPassword(input.next());
        if((member=hasMember(member))!=null){
            System.out.print("请输入新的会员密码：");
            //新的会员密码不能小于6位
            String pwd;
            boolean flag = true;
            do{
                pwd = input.next();
                if(pwd.length()<6){
                    System.out.print("会员密码不能小于6位，请重新输入会员密码：");
                    flag = false;
                }else{
                    flag = true;
                    member.setPassword(pwd);
                }
            }while(!flag);
            return true;
        }else{
            System.out.println("您输入的会员卡号或密码错误,无法修改密码！");
        }
        return false;
    }

    //积分累计
    public boolean saveScore(){
        return true;
    }

    //积分兑换
    public boolean minusScore(){
        return true;
    }

    //生成随机卡号
    public int createId(){
        boolean flag=true;
        Random random = new Random();
        int id=random.nextInt(99999999);
        for(Member member:memberList){
            if(member.getCardId()==id){
                id=random.nextInt(99999999);
            }
        }
        return id;
    }

    //开卡
    public void register(){
        Member member=new Member();
        System.out.print("请输入注册姓名：");
        member.setName(input.next());
        //会员卡号随机生成
        member.setCardId(this.createId());
        System.out.print("请输入注册密码：");
        //会员密码不能小于6位
        String pwd;
        boolean flag = true;
        do{
            pwd = input.next();
            if(pwd.length()<6){
                System.out.print("会员密码不能小于6位，请重新输入注册密码：");
                flag = false;
            }else{
                flag = true;
                member.setPassword(pwd);
            }
        }while(!flag);
        member.setScore(100);

        //增加会员开卡日期
        Date date = new Date();
        String registDate = new SimpleDateFormat("yyyy-MM-dd").format(date);
        member.setRegistDate(registDate);

        memberList.add(member);
        System.out.println("恭喜，开通会员卡成功，系统赠送您100积分！您的会员卡号为："+member.getCardId());
    }

    //查询积分
    public void showScore(){

    }
}