[Java知识库]Java ATM系统 控制台界面

• 这应该算最基础的Javase项目了，但其中逻辑还是得想想的。
• 功能还算完善，只是对输入数据的校验没做全，之后做web时再加上。
• 没有数据库。
• 完整代码在最后。

流程图

登录

• 想模拟提款机插卡登录的，因此没做注册账号的功能，手动先塞了三个账号。
• 有三次输入密码机会。
  

查询

取款

存款

转账

修改密码

退出

代码

文件结构

下面两个类复制过去放到ATM文件夹下就能运行。

package ATM;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class Account {

    private String cardID;
    private String username;
    private String password;
    private double balance;
    private boolean status;//卡 锁定状态

    public Account() {
    }

    public Account(String cardID, String username, String password, double balance, boolean status) {
        this.cardID = cardID;
        this.username = username;
        this.password = password;
        this.balance = balance;
        this.status = status;
    }

    public Account(String cardID, String username, String password, double balance) {
        this.cardID = cardID;
        this.username = username;
        this.password = password;
        this.balance = balance;
    }

    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 getBalance() {
        return balance;
    }

    public void setBalance(double balance) {
        this.balance = balance;
    }

    public boolean isStatus() {
        return status;
    }

    public void setStatus(boolean status) {
        this.status = status;
    }

    @Override
    public String toString(){
        System.currentTimeMillis();
        Date date = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String formatDate = sdf.format(date);
        return "银行：新航路银行\n" +
                "银行账号:"+cardID+"\n"
                +"用户名："+username+"\n"
                +"余额："+balance+"\n"
                +formatDate;
    }
}

package ATM;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Scanner;

public class ATM {

    static Scanner sc = new Scanner(System.in);
    static ArrayList<Account> accounts;

    public static void main(String[] args) {

        //模仿插卡ATM,因此没做注册用户功能，这里自己添加了几个用户做测试。
        accounts = new ArrayList<>();
        accounts.add(new Account("10001", "路飞", "ONEPIECE", 100,true));
        accounts.add(new Account("10002", "索隆", "123456", 10000,false));
        accounts.add(new Account("10003", "娜美", "123456", 1000000d,true));

        //登录
        loginVerify();

    }

    //登录验证
    public static void loginVerify() {
        System.out.println("提示：有这些账户");
        for (Account account : accounts) {
            System.out.println("卡号："+account.getCardID() +"  用户名：" + account.getUsername()+"  密码："+account.getPassword()+"  余额："+account.getBalance());
        }
        System.out.println("---------------------------------------------");

        //模拟插卡,手动输入银行卡号
        System.out.print("输入银行卡号:");
        String cardID = sc.next();

        //根据卡号,判断此账号是否存在
        for (int i = 0; i < accounts.size(); i++) {
            Account account = accounts.get(i);
            if (cardID.equals(account.getCardID())) { //判断卡号是否存在
                if(account.isStatus()) { //看该卡是否被锁
                    //账号存在，输入密码
                    System.out.print("请输入密码:");
                    int count = 3;//可输入3次密码
                    while (count > 0) {
                        sc.useDelimiter("\n");
                        String pwd = sc.next();
                        if (pwd.equals(accounts.get(i).getPassword())) {
                            //登录成功，转到主界面
                            mainInterface(accounts.get(i));
                        } else {
                            if(--count == 0){
                                System.out.println("此卡已锁，请到人工处咨询办理。");
                                accounts.get(i).setStatus(false);
                            }else {
                                System.out.println("还有" + count + "次输入机会");
                            }
                        }
                    }
                }else{
                    System.out.println("此卡已锁，请到人工处咨询办理。");
                }
                break;
            }
            if(i == accounts.size()-1){
                System.out.println("此卡号不存在!!");
            }
        }
    }

    public static void mainInterface(Account account) {

        System.out.println("=====================================");
        System.out.println("|| 1.查询余额               5.修改密码||");
        System.out.println("|| 2.取款                  6.退卡    ||");
        System.out.println("|| 3.存款                           ||");
        System.out.println("|| 4.转账                           ||");
        System.out.println("=====================================");
        System.out.print("请输入要操作的号码:");
        int i = sc.nextInt();
        switch (i) {
            case 1:
                queryBalance(account);
                break;
            case 2:
                withdrawal(account);
                break;
            case 3:
                deposit(account);
                break;
            case 4:
                transfer(account);
                break;
            case 5:
                updatePassword(account);
                break;
            case 6:
                exitSystem();
                break;
            default:
                System.out.println("输入号码不对！");
                break;
        }

    }

    //查询余额
    public static void queryBalance(Account account) {
        System.out.println("=====================================");
        System.out.println("|| "+account.getUsername() + "的余额: " + account.getBalance());
        System.out.println("=====================================");
        mainInterface(account);
    }

    //取款
    public static void withdrawal(Account account) {
        System.out.print("请输入取款金额:");
        double money = sc.nextInt();
        if (money <= account.getBalance()) {
            account.setBalance(account.getBalance() - money);
            System.out.println("取款成功!!");
            System.out.println("=====================================");
            System.out.println("|| 1.返回主界面             2.打印发票||");
            System.out.println("=====================================");
            int i = sc.nextInt();
            switch (i) {
                case 1:
                    mainInterface(account);
                    break;
                case 2:
                    Date date = new Date();
                    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                    String formatDate = sdf.format(date);
                    System.out.println("银行:新航路银行\n"+
                            "银行卡："+account.getCardID()+"\n"+
                            "用户名："+account.getUsername()+"\n"+
                            "本次取款:"+money+"\n"+
                            formatDate);
                    mainInterface(account);
                    break;
            }
        } else {
            System.out.println("oh,我可怜的孩子！余额不足捏。");
            System.out.println("=====================================");
            System.out.println("|| 1.返回 enter                       ||");
            System.out.println("=====================================");
            sc.next();
            mainInterface(account);
        }
    }

    //存款
    public static void deposit(Account account) {
        System.out.print("请输入要存款金额:");
        double tempMoney = sc.nextDouble();
        account.setBalance(account.getBalance() + tempMoney);
        System.out.println("哔~哔~哔  点钞中...");
        System.out.println("存款成功");
        mainInterface(account);
    }

    //转账
    public static void transfer(Account account) {
        System.out.println("请输入对方卡号(提示账号有：10001 /10002 /10003)");
        String cardID = sc.next();

        //根据卡号,判断此账号是否存在
        for (int i = 0; i < accounts.size(); i++) {
            if (cardID.equals(accounts.get(i).getCardID())) {
                System.out.print("请输入对象用户名验证：");
                sc.nextLine();
                String next = sc.nextLine();
                if(next.equals(accounts.get(i).getUsername())) {
                    System.out.print("请输入要转的金额:");
                    double m = sc.nextDouble();
                    if (m > account.getBalance()) {
                        System.out.println("你没这么多钱，转账失败！");
                        break;
                    } else {
                        account.setBalance(account.getBalance() - m);
                        accounts.get(i).setBalance(m + accounts.get(i).getBalance());
                        System.out.println("转账成功");
                        break;
                    }
                }else{
                    System.out.println("账号与用户名不匹配,转账失败");
                    break;
                }
            }
           if(i == accounts.size()-1) {
               System.out.println("此卡号不存在!!");
           }
        }
        mainInterface(account);
    }

    //5. 修改密码
    public static void updatePassword(Account account){
        System.out.print("请输入新密码:");
        String s1 = sc.next();
        System.out.print("请再次输入新密码:");
        String s2 = sc.next();
        if(s1.equals(s2)){
            account.setPassword(s1);
            System.out.println("密码修改成功,请重新登录!");
            loginVerify();
        }else{
            System.out.println("两次密码不一致");
            mainInterface(account);
        }
    }

    //6. 退出
    public static void exitSystem() {

        System.exit(0);
        //loginVerify();
    }
}