DES加解密

@Test
public void test() throws Exception {
       String data = "lala";
        String key = "helloworld";
       String result = SystemUtil.encryptDES(data, key);
       Assert.assertEquals(SystemUtil.decryptDES(result, key), data);
       System.out.println(result);
  }
/**
     * DES
     *  加密
     * @param data
     * @param key
     * @return
     * @throws Exception
     */
    public static byte[] encryptDES(byte[] data, byte[] key) throws Exception {
       SecureRandom sr = new SecureRandom();
       DESKeySpec dks = new DESKeySpec(key);
       SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(SystemUtil.KEY_ALGORITHM_DES);
       SecretKey securekey = keyFactory.generateSecret(dks);
      Cipher cipher = Cipher.getInstance(SystemUtil.KEY_ALGORITHM_DES);
       cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
       return cipher.doFinal(data);
    }
/**
     * DES
     *解密
     * @param data
     * @param key
     * @return
     * @throws Exception
     */
    public static byte[] decryptDES(byte[] data, byte[] key) throws Exception {
       SecureRandom sr = new SecureRandom();
       DESKeySpec dks = new DESKeySpec(key);
       SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(SystemUtil.KEY_ALGORITHM_DES);
       SecretKey securekey = keyFactory.generateSecret(dks);
       Cipher cipher = Cipher.getInstance(SystemUtil.KEY_ALGORITHM_DES);
       cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
       return cipher.doFinal(data);
    }
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原文链接：https://blog.csdn.net/qq_32343577/article/details/81632451