如何用Java进行DES加密解密

SecureRandom sr = new SecureRandom();
DESKeySpec dks = new DESKeySpec(PASSWORD_CRYPT_KEY.getBytes());
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey securekey = keyFactory.generateSecret(dks);
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
return new String(Hex.encodeHex(cipher.doFinal(str.getBytes())));

SecureRandom sr = new SecureRandom();
DESKeySpec dks = new DESKeySpec(PASSWORD_CRYPT_KEY.getBytes());
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey securekey = keyFactory.generateSecret(dks);
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
return new String(cipher.doFinal(Hex.decodeHex(str.toCharArray())));