一种简单的Java解密方法

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import java.nio.charset.StandardCharsets;
import java.util.Base64;

public class JavaDecryptionExample {
    public static void main(String[] args) throws Exception {
        String encryptedText = "encrypted text"; // 加密后的文本
        String key = "secret key"; // 密钥

        // 创建DES算法的密钥规范
        DESKeySpec keySpec = new DESKeySpec(key.getBytes(StandardCharsets.UTF_8));
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey secretKey = keyFactory.generateSecret(keySpec);

        // 创建解密器
        Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, secretKey);

        // 解密文本
        byte[] encryptedBytes = Base64.getDecoder().decode(encryptedText);
        byte[] decryptedBytes = cipher.doFinal(encryptedBytes);
        String decryptedText = new String(decryptedBytes, StandardCharsets.UTF_8);

        System.out.println("Decrypted Text: " + decryptedText);
    }
}