加密解密工具类

加密解密工具类

• package com.example.modules.util;import javax.crypto.Cipher;
  import javax.crypto.KeyGenerator;  
  import javax.crypto.SecretKey;  
  import javax.crypto.spec.SecretKeySpec;  
  import java.security.SecureRandom;  
  import java.util.Base64;  public class EncryptionUtil {  // DES加密解密  public static String desEncrypt(String data, String key) throws Exception {  SecretKey secretKey = generateDESKey(key);  Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");  cipher.init(Cipher.ENCRYPT_MODE, secretKey);  byte[] encrypted = cipher.doFinal(data.getBytes());  return Base64.getEncoder().encodeToString(encrypted);  }  public static String desDecrypt(String encryptedData, String key) throws Exception {  SecretKey secretKey = generateDESKey(key);  Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");  cipher.init(Cipher.DECRYPT_MODE, secretKey);  byte[] original = cipher.doFinal(Base64.getDecoder().decode(encryptedData));  return new String(original);  }  private static SecretKey generateDESKey(String key) throws Exception {  byte[] keyBytes = key.getBytes();  SecretKeySpec keySpec = new SecretKeySpec(keyBytes, 0, 8, "DES");  return keySpec;  }  // AES加密解密  public static String aesEncrypt(String data, String key) throws Exception {  SecretKey secretKey = generateAESKey(key);  Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");  cipher.init(Cipher.ENCRYPT_MODE, secretKey);  byte[] encrypted = cipher.doFinal(data.getBytes());  return Base64.getEncoder().encodeToString(encrypted);  }  public static String aesDecrypt(String encryptedData, String key) throws Exception {  SecretKey secretKey = generateAESKey(key);  Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");  cipher.init(Cipher.DECRYPT_MODE, secretKey);  byte[] original = cipher.doFinal(Base64.getDecoder().decode(encryptedData));  return new String(original);  }  private static SecretKey generateAESKey(String key) throws Exception {  byte[] keyBytes = key.getBytes();  SecretKeySpec keySpec = new SecretKeySpec(keyBytes, 0, 16, "AES");  return keySpec;  }  public static void main(String[] args) {  try {  String originalText = "Hello, World!";  String desKey = "12345678"; // DES key must be 8 bytes  String aesKey = "1234567890123456"; // AES key must be 16 bytes  String desEncrypted = desEncrypt(originalText, desKey);  String desDecrypted = desDecrypt(desEncrypted, desKey);  String aesEncrypted = aesEncrypt(originalText, aesKey);  String aesDecrypted = aesDecrypt(aesEncrypted, aesKey);  System.out.println("DES Original: " + originalText);  System.out.println("DES Encrypted: " + desEncrypted);  System.out.println("DES Decrypted: " + desDecrypted);  System.out.println("AES Original: " + originalText);  System.out.println("AES Encrypted: " + aesEncrypted);  System.out.println("AES Decrypted: " + aesDecrypted);  } catch (Exception e) {  e.printStackTrace();  }  }  
  }