C#中可以与java进行互相转换的3des的加密和解密

 ///3DES加密   
        public static string TripleDESEncrypt(string pToEncrypt, string sKey)
        {
            try
            {
                sKey = sKey.Substring(0, 24);
                TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider();
                des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
                des.IV = new Byte[] { 0, 00, 00, 00, 00, 00, 00, 00, };// ASCIIEncoding.ASCII.GetBytes(sKey.Substring(0, 8));
                des.Mode = CipherMode.ECB;
                des.Padding = PaddingMode.Zeros;
                MemoryStream ms = new MemoryStream();
                CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);

                byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock(); ;
                StringBuilder ret = new StringBuilder();
                foreach (byte b in ms.ToArray())
                {
                    ret.AppendFormat("{0:X2}", b);
                }
                ret.ToString();

                return ret.ToString();
            }
            catch (Exception ex)
            {
                return ex.Message;
            }
        }

        ///3DES解密   
        public static string TripleDESDecrypt(string pToDecrypt, string sKey)
        {
            sKey = sKey.Substring(0, 24);
            TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider();
            des.Mode = CipherMode.ECB;
            des.Padding = PaddingMode.Zeros;
            byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
            for (int x = 0; x < pToDecrypt.Length / 2; x++)
            {
                int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
                inputByteArray[x] = (byte)i;
            }

            des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
            des.IV = new Byte[] { 0, 00, 00, 00, 00, 00, 00, 00, };
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();

            StringBuilder ret = new StringBuilder();

            return System.Text.Encoding.Default.GetString(ms.ToArray()).Replace("\0","");
        }