如何将 MVC 应用于核心 Java 控制台应用程序？

问题描述

我是 Java 新手，正在从事银行账户项目。要求是使用 MVC 架构制作控制台应用程序。我之前将 MVC 用于 Web 应用程序，但不确定它如何用于控制台应用程序。如果有人可以提供有关结构的反馈，那将非常有帮助。此外，我创建了一个 fundTransfer 方法，但每当我运行该程序时，它都不会更新现有余额。我知道我可能会遗漏一些东西，但我迷失了我在这里遗漏的东西。我在下面附上了一些片段来显示问题。欢迎大家到我的github了解整个项目并在那里进行批评。 Github bank core java console app

SavingsAccount 模型的片段如下所示：

public class SavingsAccount implements Account {
private String userId;
private String stringAccountBalance;
private String stringFundsTransfer;
public ArrayList<String> transactions;
private BigDecimal bigDecimalAccountBalance = BigDecimal.ZERO;
private BigDecimal bigDecimalFundsTransfer= BigDecimal.ZERO;

public Map<String,SavingsAccount> savingsAccountMap;

public SavingsAccount() {
    savingsAccountMap = new HashMap<String,SavingsAccount>();
}

public SavingsAccount(Customer newCustomer) {
    transactions  =  new ArrayList<String>(5);
    addTransaction("Initial Deposit: " + newCustomer.initialDeposit);
}

public SavingsAccount(String userId) {
    this.userId = userId;
}

public SavingsAccount(String userId,String stringAccountBalance,String stringFundsTransfer) {
    this.userId = userId;
    this.stringAccountBalance = stringAccountBalance;
    this.stringFundsTransfer = stringFundsTransfer;
}

控制器类的片段如下所示：

public static Customer customer = new Customer();
public static SavingsAccount savingsAccount = new SavingsAccount();

...

    SavingsAccount newAccount = new SavingsAccount(userId);
    savingsAccount.savingsAccountMap.put(userId,newAccount);

...

if (customer.customerMap.containsKey(userId)) {
            Customer newCustomer = customer.customerMap.get(userId);
            savingsAccount = new SavingsAccount(newCustomer);

fundsTransfer 方法的代码片段如下所示：

public static void fundsTransfer(Customer newCustomer) throws InterruptedException {
    printBox("Welcome to the Funds Transfer Portal");
    Scanner scan = new Scanner(system.in);
    String userId = "";
    String fundsTransfer = "";

    System.out.print("Enter payee user Id : ");
    userId = scan.next();
    scan.nextLine();
    System.out.println("Enter amount : ");

    fundsTransfer = scan.nextLine();
    if((Double.parseDouble(fundsTransfer)) > 300000)
    {
        System.out.println("Transfer limit exceeded. Contact bank manager.");
        return;
    }
    if (customer.customerMap.containsKey(userId)) {
        Customer payee = customer.customerMap.get(userId);
        SavingsAccount payeeAccount = new SavingsAccount(payee);
        payeeAccount.depositFunds(fundsTransfer);
        savingsAccount.withdrawFunds(fundsTransfer);
        System.out.print("\nFunds transferred successfully \nUpdated Balance for the payee: " + Double.sum(payee.initialDeposit,Double.parseDouble(payeeAccount.getBalance())) +
                "\nUpdated Balance for the payer: " + Double.sum(newCustomer.initialDeposit,Double.parseDouble(savingsAccount.getBalance())) + "\n");
        savingsAccount.addTransaction(savingsAccount.getBalance() + " transferred from your account.");
    } else {
        System.out.println("User Id doesn't exist.");
    }
}

解决方法

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