java 的3DES解密和加密

/**
     * 3des解密
     *
     * @param ss
     *            要解密的数据
     * @param deskey
     *            生成密钥用的数组
     * @return
     * @throws NoSuchAlgorithmException
     * @throws NoSuchPaddingException
     * @throws InvalidKeyException
     * @throws IllegalBlockSizeException
     * @throws BadPaddingException
     */
     public static byte[] DesDecode(byte[] ss, byte[] deskey)
               throws NoSuchAlgorithmException, NoSuchPaddingException,
               InvalidKeyException, IllegalBlockSizeException, BadPaddingException {
          //负责完成加密或解密工
          Cipher c = Cipher.getInstance(modeDes);
          //格式化密
          SecretKeySpec k = new SecretKeySpec(deskey, modeDesKey);
          // 根据密钥，对Cipher对象进行初始ENCRYPT_MODE表示加密模式
          c.init(Cipher.DECRYPT_MODE, k);
          // 解密，结果保存进dec
          byte[] dec = c.doFinal(ss);
          return dec;
     }
     

     /**
     * 3des加密
     *
     * @param ss
     *            要加密的字符
     * @param deskey
     * @return
     * @throws NoSuchAlgorithmException
     * @throws NoSuchPaddingException
     * @throws InvalidKeyException
     * @throws IllegalBlockSizeException
     * @throws BadPaddingException
     * @throws UnsupportedEncodingException
     */
     public static byte[] DesEncode(byte[] ss, byte[] deskey)
               throws NoSuchAlgorithmException, NoSuchPaddingException,
               InvalidKeyException, IllegalBlockSizeException, BadPaddingException {
          //负责完成加密或解密工
          Cipher c = Cipher.getInstance(modeDes);
          //格式化密
          SecretKeySpec k = new SecretKeySpec(deskey, modeDesKey);
          // 根据密钥，对Cipher对象进行初始ENCRYPT_MODE表示加密模式
          c.init(Cipher.ENCRYPT_MODE, k);
          byte[] src = ss;
          // 加密，结果保存进enc
          byte[] enc = c.doFinal(ss);
          return enc;
     }