用Java怎么做银行管理系统项目

Question

项目：银行管理系统要求：通过Java控制台开发一个银行管理系统，实现银行管理员工功能和顾客功能。具体要求如下：（1）管理员功能：登录、添加顾客、删除顾客、计算存储金额、富豪排行榜、退出。（2）顾客功能：登录、存款、取款、转账、修改密码、退出。其中管理员界面如下所示

Answer 1

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本答案参考通义千问

要开发一个银行管理系统项目，你需要设计和实现多个功能模块。以下是一个详细的解决方案，包括代码示例。

解决方案

1. 定义用户类
2. 定义银行类
3. 实现管理员功能
4. 实现顾客功能
5. 主程序入口

1. 定义用户类

public class User {
    private String name;
    private String idNumber;
    private String password;
    private double balance;
    private int accountNumber;

    public User(String name, String idNumber, String password, double balance, int accountNumber) {
        this.name = name;
        this.idNumber = idNumber;
        this.password = password;
        this.balance = balance;
        this.accountNumber = accountNumber;
    }

    // Getters and Setters
    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
    public String getIdNumber() { return idNumber; }
    public void setIdNumber(String idNumber) { this.idNumber = idNumber; }
    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 int getAccountNumber() { return accountNumber; }
    public void setAccountNumber(int accountNumber) { this.accountNumber = accountNumber; }
}

2. 定义银行类

import java.util.HashMap;
import java.util.Map;

public class Bank {
    private Map<Integer, User> users;
    private int nextAccountNumber;

    public Bank() {
        users = new HashMap<>();
        nextAccountNumber = 1001; // Starting account number
    }

    public boolean addCustomer(User user) {
        if (!users.containsKey(user.getAccountNumber())) {
            users.put(user.getAccountNumber(), user);
            return true;
        }
        return false;
    }

    public boolean removeCustomer(int accountNumber) {
        if (users.containsKey(accountNumber)) {
            users.remove(accountNumber);
            return true;
        }
        return false;
    }

    public User findCustomerByAccountNumber(int accountNumber) {
        return users.get(accountNumber);
    }

    public void deposit(int accountNumber, double amount) {
        User user = users.get(accountNumber);
        if (user != null) {
            user.setBalance(user.getBalance() + amount);
        }
    }

    public void withdraw(int accountNumber, double amount) {
        User user = users.get(accountNumber);
        if (user != null && user.getBalance() >= amount) {
            user.setBalance(user.getBalance() - amount);
        }
    }

    public void transfer(int fromAccountNumber, int toAccountNumber, double amount) {
        withdraw(fromAccountNumber, amount);
        deposit(toAccountNumber, amount);
    }

    public void updatePassword(int accountNumber, String newPassword) {
        User user = users.get(accountNumber);
        if (user != null) {
            user.setPassword(newPassword);
        }
    }

    public void printWealthRanking() {
        users.values().stream()
                .sorted((u1, u2) -> Double.compare(u2.getBalance(), u1.getBalance()))
                .forEach(user -> System.out.println(user.getName() + " : " + user.getBalance()));
    }
}

3. 实现管理员功能

public class AdminMenu {
    private Bank bank;

    public AdminMenu(Bank bank) {
        this.bank = bank;
    }

    public void showAdminMenu() {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println("--------银行管理系统[管理员]--------");
            System.out.println("1、添加顾客");
            System.out.println("2、计算存储金额");
            System.out.println("3、富豪排行榜");
            System.out.println("4、退出");

            System.out.print("请选择服务种类：");
            int choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    addCustomer();
                    break;
                case 2:
                    calculateTotalAmount();
                    break;
                case 3:
                    wealthRanking();
                    break;
                case 4:
                    return;
                default:
                    System.out.println("无效的选择！");
            }
        }
    }

    private void addCustomer() {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入姓名：");
        String name = scanner.nextLine();
        System.out.print("请输入身份证号码(18位)：");
        String idNumber = scanner.nextLine();
        System.out.print("请输入密码：");
        String password = scanner.nextLine();
        System.out.print("请输入初始余额：");
        double balance = scanner.nextDouble();

        User newUser = new User(name, idNumber, password, balance, nextAccountNumber++);
        if (bank.addCustomer(newUser)) {
            System.out.println("开户成功！你的账号为：" + newUser.getAccountNumber());
            System.out.println("开户日期为：" + java.time.LocalDate.now());
        } else {
            System.out.println("开户失败！");
        }
    }

    private void calculateTotalAmount() {
        double total = bank.users.values().stream().mapToDouble(User::getBalance).sum();
        System.out.println("当前存储总金额为：" + total);
    }

    private void wealthRanking() {
        System.out.println("富豪排行榜：");
        bank.printWealthRanking();
    }
}

4. 实现顾客功能

public class CustomerMenu {
    private Bank bank;
    private int accountNumber;

    public CustomerMenu(Bank bank, int accountNumber) {
        this.bank = bank;
        this.accountNumber = accountNumber;
    }

    public void showCustomerMenu() {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println("--------银行管理系统[顾客]--------");
            System.out.println("1、存款");
            System.out.println("2、取款");
            System.out.println("3、转账");
            System.out.println("4、修改密码");
            System.out.println("5、退出");

            System.out.print("请选择服务种类：");
            int choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    deposit();
                    break;
                case 2:
                    withdraw();
                    break;
                case 3:
                    transfer();
                    break;
                case 4:
                    updatePassword();
                    break;
                case 5:
                    return;
                default:
                    System.out.println("无效的选择！");
            }
        }
    }

    private void deposit() {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入存款金额：");
        double amount = scanner.nextDouble();
        bank.deposit(accountNumber, amount);
        System.out.println("存款成功！");
    }

    private void withdraw() {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入取款金额：");
        double amount = scanner.nextDouble();
        bank.withdraw(accountNumber, amount);
        System.out.println("取款成功！");
    }

    private void transfer() {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入转入账户号：");
        int toAccountNumber = scanner.nextInt();
        System.out.print("请输入转账金额：");
        double amount = scanner.nextDouble();
        bank.transfer(accountNumber, toAccountNumber, amount);
        System.out.println("转账成功！");
    }

    private void updatePassword() {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入新密码：");
        String newPassword = scanner.nextLine();
        bank.updatePassword(accountNumber, newPassword);
        System.out.println("密码修改成功！");
    }
}

5. 主程序入口

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Bank bank = new Bank();
        Scanner scanner = new Scanner(System.in);

        while (true) {
            System.out.println("银行管理系统");
            System.out.println("1、管理员");
            System.out.println("2、顾客");
            System.out.println("0、退出");

            System.out.print("请输入身份：");
            int choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    adminLogin(bank);
                    break;
                case 2:
                    customerLogin(bank);
                    break;
                case 0:
                    return;
                default:
                    System.out.println("无效的选择！");
            }
        }
    }

    private static void adminLogin(Bank bank) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入管理员名称：");
        String adminName = scanner.nextLine();
        System.out.print("请输入管理员密码：");
        String adminPassword = scanner.nextLine();

        if ("admin".equals(adminName) && "admin123".equals(adminPassword)) {
            AdminMenu adminMenu = new AdminMenu(bank);
            adminMenu.showAdminMenu();
        } else {
            System.out.println("登录失败！");
        }
    }

    private static void customerLogin(Bank bank) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入账号：");
        int accountNumber = scanner.nextInt();
        System.out.print("请输入密码：");
        String password = scanner.next();

        User user = bank.findCustomerByAccountNumber(accountNumber);
        if (user != null && password.equals(user.getPassword())) {
            CustomerMenu customerMenu = new CustomerMenu(bank, accountNumber);
            customerMenu.showCustomerMenu();
        } else {
            System.out.println("登录失败！");
        }
    }
}

总结

以上代码实现了银行管理系统的大部分功能。你可以根据实际需求进行进一步的扩展和优化。例如，可以增加更多的验证逻辑、异常处理等。