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Account.java

public class Account {private String cardId; //卡号private String userName; //用户名private String passWord; //密码private double money; //余额private double quotaMoney; //单次取现额度public Account() {}public Account(String cardId, String userName, String passWord, double money, double quotaMoney) {this.cardId = cardId;this.userName = userName;this.passWord = passWord;this.money = money;this.quotaMoney = quotaMoney;}public String getCardId() {return cardId;}public void setCardId(String cardId) {this.cardId = cardId;}public String getUserName() {return userName;}public void setUserName(String userName) {this.userName = userName;}public String getPassWord() {return passWord;}public void setPassWord(String passWord) {this.passWord = passWord;}public double getMoney() {return money;}public void setMoney(double money) {this.money = money;}public double getQuotaMoney() {return quotaMoney;}public void setQuotaMoney(double quotaMoney) {this.quotaMoney = quotaMoney;}
}

ATMSystem.java

public class ATMSystem {public static void main(String[] args) {//1. 定义账户类//2. 准备系统需要的容器对象，用于存储账户对象ArrayList<Account> accounts = new ArrayList<>();//3. 准备系统首页：登陆、注册showMain(accounts);}/*** 首页* @param accounts 用户名*/public static void showMain(ArrayList<Account> accounts){Scanner sc = new Scanner(System.in);while (true) {System.out.println("1. 登陆");System.out.println("2. 开户");System.out.println("输入您想做的操作: ");int command = sc.nextInt();switch (command) {case 1://登陆login(accounts,sc);break;case 2://开户register(accounts,sc);break;default:System.out.println("您的输入有误，请重新输入");System.out.println();}}}/*** 登陆账户* @param accounts 账户集合* @param sc 用户输入*/private static void login(ArrayList<Account> accounts, Scanner sc) {//判断系统中是否存在账户if (accounts.size() == 0){//没有账户System.out.println("该系统无任何账户，需要先注册");System.out.println();return;}while (true) {//输入卡号，根据卡号查询账户对象System.out.println("请输入卡号: ");String cardId = sc.next();Account account = (getAccountByCardId(cardId,accounts));//判断卡号是否存在if (account != null){while (true) {System.out.println("输入登陆密码: ");String password = sc.next();//判断密码是否正确if (account.getPassWord().equals(password)) {//正确System.out.println("登陆成功");System.out.println("欢迎您，" + account.getUserName());System.out.println("您的卡号为: " + account.getCardId());System.out.println();//展示操作页面showUserCommand(sc, account, accounts);return; //结束当前登陆方法} else {System.out.println("密码输入错误, 请重新输入");}}}else {System.out.println("不存在该卡号");}}}/*** 展示操作页面* @param sc 用户输入* @param account 当前账户* @param accounts 所有账户集合*/private static void showUserCommand(Scanner sc, Account account, ArrayList<Account> accounts) {while (true) {System.out.println("================用户操作界面================");System.out.println("1. 查询账户");System.out.println("2. 存款");System.out.println("3. 取款");System.out.println("4. 转账");System.out.println("5. 修改密码");System.out.println("6. 退出");System.out.println("7. 注销账户");System.out.println("请输入操作命令: ");int command = sc.nextInt();switch (command){case 1://查询账户showAccount(account);break;case 2://存款depositMoney(account,sc);break;case 3://取款drawMoney(account,sc);break;case 4://转账transferMoney(accounts,account,sc);break;case 5://修改密码updataPassword(account,sc);return;case 6://退出System.out.println("欢迎下次使用");System.out.println();return; //结束当前操作case 7://注销账户int number = removeAccount(accounts,account,sc);if (number == 1) {//成功return; //跳出当前循环}else {//失败break;}default:System.out.println("命令输入有误，请重新输入");}}}/*** 销户* @param accounts 所有账户集合* @param account 当前账户* @param sc 用户输入*/private static int removeAccount(ArrayList<Account> accounts, Account account, Scanner sc) {//从当前accounts类中删除该账户System.out.println("请输入当前密码");String password = sc.next();if (account.getPassWord().equals(password)) {//密码输入正确accounts.remove(account);System.out.println("销户成功");System.out.println();return 1;}else {System.out.println("密码输入错误");System.out.println();return 0;}}/*** 修改密码* @param account 当前账户* @param sc 用户输入*/private static void updataPassword(Account account, Scanner sc) {System.out.println("================修改密码================");System.out.println("请输入旧密码");String oldPassword = sc.next();if (account.getPassWord().equals(oldPassword)) {//密码输入正确,开始修改密码while (true) {System.out.println("请输入新密码");String nowPassword = sc.next();System.out.println("再次输入新密码");String againPassword = sc.next();if (nowPassword.equals(againPassword)) {account.setPassWord(nowPassword);System.out.println("密码修改成功");System.out.println();return; //跳出当前循环} else {System.out.println("两次密码输入不一致，请重新输入");System.out.println();}}}else {System.out.println("密码输入错误，请重新输入");System.out.println();return; //跳出当前循环}}/*** 转账功能* @param accounts 所有账户集合* @param account 当前账户* @param sc 用户输入*/private static void transferMoney(ArrayList<Account> accounts, Account account, Scanner sc) {//判断系统中是否有两个账户及以上if (accounts.size() < 2) {System.out.println("系统无其他账户");System.out.println();return; //跳出功能}//判断当前账户是否有钱if (account.getMoney() == 0) {System.out.println("当前账户余额为0");System.out.println();return;}//开始转账while (true) {System.out.println("输入对方卡号：");String cardId = sc.next();Account account1 = getAccountByCardId(cardId, accounts);//判断对方账户是否存在if (account != null) {//判断转账对象是否是自己if (account.getCardId().equals(account1.getCardId())){System.out.println("不能自己给自己转");System.out.println();}else {//确认对方姓氏String name = account1.getUserName().substring(1);System.out.println("请确认转账人：" + name + " 的姓氏");String preName = sc.next();//判断if (account1.getUserName().startsWith(preName)){//真正开始转账System.out.println("输入转账金额：");double money = sc.nextDouble();//判断金额是否超过用户自己的余额if (money > account.getMoney()) {System.out.println("转账金额超出您的余额");System.out.println("您当前余额为：" + account.getMoney());System.out.println();}else {//开始转账account.setMoney(account.getMoney() - money);account1.setMoney(account1.getMoney() + money);System.out.println("转入成功, 此次为 " + account1.getUserName()+ " 转入金额为：" + money);showAccount(account);System.out.println();return; //结束当前方法}}else {System.out.println("认证信息有误");System.out.println();}}} else {System.out.println("账户不存在，请重新输入");System.out.println();}}}/*** 取款* @param account 当前账户* @param sc 用户输入*/private static void drawMoney(Account account, Scanner sc) {System.out.println("================取款================");//判断账户余额是否大于100元if (account.getMoney() >= 100) {while (true) {System.out.println("请输入取款金额");double money = sc.nextDouble();//判断取款金额是否超出单次限额if (account.getQuotaMoney() >= money) {//判断输入金额是否超出账户余额if (account.getMoney() >= money) {//未超出account.setMoney(account.getMoney() - money);System.out.println("取款成功");System.out.println();showAccount(account);return; //结束当前方法} else {//超出System.out.println("余额不足");System.out.println();}} else {System.out.println("取款金额超出单次限额, 请重新输入存款金额" +"(" + "单次取款金额为: " + account.getQuotaMoney() + " )");System.out.println();}}}else {System.out.println("账户不足100元，请确保账户余额大于100");System.out.println();return; //跳出当前方法}}/*** 存款* @param account 当前账户* @param sc 用户输入*/private static void depositMoney(Account account, Scanner sc) {System.out.println("================存款================");System.out.println("请输入存款金额");double money = sc.nextDouble();//修改账户余额account.setMoney(account.getMoney() + money);System.out.println("存款成功");showAccount(account);}/*** 展示账户信息* @param account 当前登陆账号*/private static void showAccount(Account account) {System.out.println("=========当前账户详情=========");System.out.println("卡号：" + account.getCardId());System.out.println("姓名：" + account.getUserName());System.out.println("余额：" + account.getMoney());System.out.println("单次限额：" + account.getQuotaMoney());System.out.println();}/*** 用户开户功能* @param accounts 账户集合对象* @param sc 用户输入*/private static void register(ArrayList<Account> accounts, Scanner sc) {System.out.println("===============用户开户功能===============");//键盘录入姓名、密码、确认密码System.out.println("请输入开户名称：");String name = sc.next();String passWord = "";while (true) {System.out.println("请输入开户密码：");passWord = sc.next();System.out.println("确认密码：");String okPassWord = sc.next();//判断两次密码是否移一致if (passWord.equals(okPassWord)) {break;} else {System.out.println("密码不一致 请重新输入密码");}}System.out.println("请输入单次限额：");double quotaMoney = sc.nextDouble();//生成账户卡号 8位且不重复String cardId = createCardId(accounts);//创建一个账户对象封装账户的信息Account account = new Account(cardId, name, passWord, quotaMoney);//将账户对象添加到集合中去accounts.add(account);System.out.println("开户成功");System.out.println("您的卡号为: " + account.getCardId());System.out.println("您的用户名为: " + account.getUserName());System.out.println();}/*** 创建卡号* @return* @param accounts 账户集合对象*/private static String createCardId(ArrayList<Account> accounts) {//生成8位卡号while (true) {String cardId = "";Random r = new Random();for (int i = 0; i < 8; i++) {cardId += r.nextInt(10);}//判断卡号是否重复Account account = getAccountByCardId(cardId, accounts);if (account == null) {//当前卡号没有重复return cardId;}}}/*** 查询账号是否存在* @param cardId 生成的8位卡号* @param accounts 账户集合对象* @return*/private static Account getAccountByCardId(String cardId, ArrayList<Account> accounts) {for (int i = 0; i < accounts.size(); i++) {Account account = accounts.get(i);if (account.getCardId().equals(cardId)){return account;}}return null; //未找到账户（卡号不重复）}
}