编辑代码

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
import java.util.Scanner;

public class DESEncryptor {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入密钥（8字节）: ");
        String key = scanner.nextLine();
        System.out.print("请输入要加密的数据: ");
        String data = scanner.nextLine();

        // 检查密钥长度
        if (key.length() != 8) {
            System.out.println("密钥长度必须为8字节。");
            return;
        }

        try {
            // 创建DES加密器
            Cipher cipher = Cipher.getInstance("DES");
            SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "DES");
            cipher.init(Cipher.ENCRYPT_MODE, secretKey);

            // 加密数据
            byte[] encryptedData = cipher.doFinal(data.getBytes(StandardCharsets.UTF_8));
            String encryptedString = Base64.getEncoder().encodeToString(encryptedData);

            System.out.println("加密后的数据: " + encryptedString);

        } catch (Exception e) {
            System.out.println("加密出现错误: " + e.getMessage());
        }
    }
}