银行转账p图在线生成， 虚拟转账生成器， 银行卡转账模拟器【娱乐装逼神器】

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银行核心业务逻辑的实现，包含账户管理、资金操作和交易记录功能。所有代码均为模拟数据，不连接真实金融系统。建议通过正规渠道学习金融科技开发，如各大银行开放平台API。

import java.util.ArrayList;
import java.util.List;
import java.util.Date;

// 银行账户实体类（线程安全）
public class BankAccount {
private final String accountNumber;
private String accountName;
private double balance;
private List transactionHistory;

public BankAccount(String number, String name) {
    this.accountNumber = number;
    this.accountName = name;
    this.balance = 0.0;
    this.transactionHistory = new ArrayList<>();
    recordTransaction("账户开户");
}

public synchronized void deposit(double amount) {
    if(amount <= 0) throw new IllegalArgumentException("金额必须大于零");
    balance += amount;
    recordTransaction(String.format("存款 +%.2f", amount));
}

public synchronized boolean withdraw(double amount) {
    if(amount <= 0) throw new IllegalArgumentException("金额必须大于零");
    if(balance >= amount) {
        balance -= amount;
        recordTransaction(String.format("取款 -%.2f", amount));
        return true;
    }
    return false;
}

private void recordTransaction(String memo) {
    String record = String.format("[%tF %<tT] %s 余额: %.2f", 
        new Date(), memo, balance);
    transactionHistory.add(record);
}

// 其他getter方法...

}

import java.util.concurrent.ConcurrentHashMap;

// 银行服务单例（线程安全）
public class BankService {
private static BankService instance;
private ConcurrentHashMap accounts;

private BankService() {
    accounts = new ConcurrentHashMap<>();
}

public static synchronized BankService getInstance() {
    if(instance == null) {
        instance = new BankService();
    }
    return instance;
}

public boolean createAccount(String accNumber, String accName) {
    return accounts.putIfAbsent(accNumber, 
        new BankAccount(accNumber, accName)) == null;
}

public boolean transfer(String from, String to, double amount) {
    BankAccount source = accounts.get(from);
    BankAccount target = accounts.get(to);

    if(source == null || target == null) return false;
    synchronized(source) {
        synchronized(target) {
            if(source.withdraw(amount)) {
                target.deposit(amount);
                return true;
            }
            return false;
        }
    }
}

}

java.util.Scanner;

// 银行系统控制台界面
public class BankApp {
public static void main(String[] args) {
BankService bank = BankService.getInstance();
Scanner scanner = new Scanner(System.in);

    while(true) {
        printMenu();
        String input = scanner.nextLine();

        switch(input) {
            case "1": 
                System.out.println("请输入账号和姓名：");
                bank.createAccount(scanner.nextLine(), scanner.nextLine());
                break;
            case "2":
                System.out.println("转账功能演示...");
                break;
            case "0": 
                System.exit(0);
            default:
                System.out.println("无效输入");
        }
    }
}

private static void printMenu() {
    System.out.println("\n=== 银行模拟系统 ===");
    System.out.println("1. 开户");
    System.out.println("2. 转账");
    System.out.println("0. 退出");
    System.out.print("请选择：");
}

}