超市会员卡管理系统

用Map 集合存储会员卡

package shopsystem;public class Card {private String name;// 姓名private String cardNum;// 卡号private String code;// 密码private String date;// 开卡日期private int score;// 积分
@Overridepublic String toString() {return "开卡人姓名：" + this.name + ", 卡号：" + this.cardNum + ", 剩余积分：" + this.score + ", 开卡日期：" + this.date;}public Card() {}public Card(String name, String cardNum, String code, String date, int score) {this.name = name;this.cardNum = cardNum;this.code = code;this.date = date;this.score = score;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getCardNum() {return cardNum;}public void setCardNum(String cardNum) {this.cardNum = cardNum;}public String getCode() {return code;}public void setCode(String code) {this.code = code;}public String getDate() {return date;}public void setDate(String date) {this.date = date;}public int getScore() {return score;}public void setScore(int score) {this.score = score;}}

Card

package shopsystem;import java.text.SimpleDateFormat;
import java.util.*;public class Action {static Scanner input = new Scanner(System.in);// 生成随机卡号public static String cardNum() {StringBuffer buf = new StringBuffer();for (int i = 0; i < 10; ++i) {Random r = new Random();buf.append(r.nextInt(9));}return buf.toString();}// 开卡public static void register() {System.out.println("请输入注册人姓名：");String name = input.next();System.out.println("请输入注册密码：");String code;for (code = input.next(); code.length() < 6; code = input.next()) {System.out.println("密码设置的位置不能小于6位，请重新输入：");}Date date = new Date();SimpleDateFormat sim = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");String riqi = sim.format(date);String cardNum;do {cardNum = cardNum();} while (ShopSys.map.containsKey(cardNum));System.out.println("开卡成功，送您100积分！您的会员卡号是:" + cardNum);ShopSys.map.put(cardNum, new Card(name, cardNum, code, riqi, 100));}// 累计积分public static void addScore() {System.out.println("请输入卡号：");String cardNum = input.next();System.out.println("请输入密码：");String code = input.next();if (ShopSys.map.containsKey(cardNum)) {boolean boo = ShopSys.map.get(cardNum).getCode().equals(code);if (boo) {System.out.println("请输入您此次消费金额(每消费1元加1积分)：");int score = input.nextInt();ShopSys.map.get(cardNum).setScore(ShopSys.map.get(cardNum).getScore() + score);System.out.println("积分累计成功，当前积分为：" + ShopSys.map.get(cardNum).getScore());} else {System.out.println("您输入的密码错误，积分累计失败！！");}} else {System.out.println("对不起，没有找到该卡号！！");}}// 查询会员卡信息public static void inquire() {System.out.println("请输入您的会员卡号：");String cardNum = input.next();System.out.println("请输入密码：");String code = input.next();if (ShopSys.map.containsKey(cardNum)) {boolean boo = ShopSys.map.get(cardNum).getCode().equals(code);if (boo) {System.out.println("您查询的会员卡信息如下：\n" + ShopSys.map.get(cardNum));} else {System.out.println("您输入的密码错误，查询失败！！");}} else {System.out.println("对不起，没有找到该卡号！！");}}// 修改密码public static void alterCode() {System.out.println("请输入会员卡号：");String cardNum = input.next();System.out.println("请输入密码：");String code = input.next();if (ShopSys.map.containsKey(cardNum)) {boolean boo = ShopSys.map.get(cardNum).getCode().equals(code);if (boo) {String newCode;System.out.println("请输入新密码：");for (newCode = input.next(); newCode.length() < 6; newCode = input.next()) {System.out.println("密码设置的位置不能小于6位，请重新输入：");}ShopSys.map.get(cardNum).setCode(newCode);System.out.println("您的会员卡密码修改成功！！！");} else {System.out.println("您输入的密码错误，修改密码失败！！");}} else {System.out.println("对不起，没有找到该卡号！！");}}// 积分兑换public static void conversion() {System.out.println("请输入会员卡号：");String cardNum = input.next();System.out.println("请输入密码：");String code = input.next();if (ShopSys.map.containsKey(cardNum)) {boolean boo = ShopSys.map.get(cardNum).getCode().equals(code);if (boo) {System.out.println("请输入您需要兑换使用的积分(每100积分抵用0.1元，不足100积分不做抵用)：");int num = input.nextInt();if (num < 100) {System.out.println("兑换积分不能小于100！");} else {if (ShopSys.map.get(cardNum).getScore() - num > 0) {ShopSys.map.get(cardNum).setScore(ShopSys.map.get(cardNum).getScore() - num / 100 * 100);System.out.println("积分兑换成功，您已用会员卡积分抵用了" + (double) (num / 100) * 1.0D + "元！");return;} else {System.out.println("对不起，你当前积分不足！！！");}}} else {System.out.println("您输入的密码错误，积分兑换失败！！");}} else {System.out.println("对不起，没有找到该卡号！！");}}}

系统相应的功能

package shopsystem;import java.util.*;public class ShopSys {static Map<String,Card> map = new HashMap<String, Card>();static Scanner input = new Scanner(System.in);public static void operation() {System.out.println("******************************XX超市会员管理系统****************************************");String select = "";start1: do {System.out.println("1、积分累计\n2、积分兑换\n3、查询积分\n4、修改密码\n5、开卡\n6、退出");System.out.println("请选择：");String str = input.next();switch (str) {case "1":Action.addScore();break;case "2":Action.conversion();break;case "3":Action.inquire();break;case "4":Action.alterCode();break;case "5":Action.register();break;case "6":System.out.println("正在退出系统.......");break start1;}System.out.println("输入0返回，输入其它信息退出系统，请输入：");select = input.next();} while (select.equals("0"));System.out.println("程序退出！");}//测试public static void main(String[] args) {operation();}
}