银行流水生成器在线制作，银行转账p图在线生成，java实现最牛的生成器【仅供学习用途】

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银行系统流水记录的真实生成原理
电子回单的加密验真技术
基于Java的财务管理系统开发
以下是一个合法的银行交易记录管理系统示例（仅展示基础架构）
// 银行交易记录实体类
public class TransactionRecord {
private String transactionId;
private LocalDateTime timestamp;
private BigDecimal amount;
private String accountFrom;
private String accountTo;
private String currency;

// 标准的getter/setter方法
// 数据验证逻辑
// 序列化方法

}

// 交易记录生成服务
public class TransactionService {
public TransactionRecord generateRecord(TransactionRequest request) {
// 实际银行系统会在此处:
// 1. 验证账户有效性
// 2. 检查余额
// 3. 生成防伪编号
// 4. 数字签名
}
}

// 记录验证服务
public class VerificationService {
public boolean verifyRecord(TransactionRecord record) {
// 实际验证逻辑包括:
// 1. 数字签名验证
// 2. 流水号校验
// 3. 与银行数据库比对
}
}

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.UUID;
import java.security.MessageDigest;

// 交易记录实体
public class TransactionRecord {
private final String transactionId;
private final LocalDateTime timestamp;
private final BigDecimal amount;
private final String accountFrom;
private final String accountTo;
private final String currency;
private String digitalSignature;

public TransactionRecord(String from, String to, BigDecimal amount, String currency) {
    this.transactionId = UUID.randomUUID().toString();
    this.timestamp = LocalDateTime.now();
    this.accountFrom = from;
    this.accountTo = to;
    this.amount = amount.setScale(2);
    this.currency = currency;
}

public void sign(MessageDigest digest) {
    String rawData = transactionId + timestamp.toString() + amount.toString();
    this.digitalSignature = bytesToHex(digest.digest(rawData.getBytes()));
}

private static String bytesToHex(byte[] hash) {
    StringBuilder hexString = new StringBuilder();
    for (byte b : hash) {
        hexString.append(String.format("%02x", b));
    }
    return hexString.toString();
}

}

import java.util.ArrayList;
import java.util.List;
import java.security.NoSuchAlgorithmException;

public class TransactionService {
private final MessageDigest digest;
private final List ledger = new ArrayList<>();

public TransactionService() throws NoSuchAlgorithmException {
    this.digest = MessageDigest.getInstance("SHA-256");
}

public TransactionRecord createTransaction(String from, String to, 
                                         double amount, String currency) {
    BigDecimal decimalAmount = BigDecimal.valueOf(amount);
    TransactionRecord record = new TransactionRecord(from, to, decimalAmount, currency);
    record.sign(digest);
    ledger.add(record);
    return record;
}

public void printLedger() {
    ledger.forEach(record -> {
        System.out.println("ID: " + record.getTransactionId());
        System.out.println("From: " + record.getAccountFrom());
        System.out.println("To: " + record.getAccountTo());
        System.out.println("Amount: " + record.getAmount() + record.getCurrency());
        System.out.println("Signature: " + record.getDigitalSignature());
        System.out.println("----------------------");
    });
}

}

class Main {
public static void main(String[] args) throws Exception {
TransactionService service = new TransactionService();

    // 模拟合法交易
    service.createTransaction("CN10001", "CN20002", 5000.00, "CNY");
    service.createTransaction("US30003", "CN10001", 1200.50, "USD");

    // 打印交易账本
    service.printLedger();
}

}