DES c#加密后java解密

  public static String byteArr2HexStr(byte[] bytIn)
        {
            StringBuilder builder = new StringBuilder();
            foreach (byte num in bytIn)
            {
                builder.AppendFormat("{0:X2}", num);
            }
            return builder.ToString();// byteArr2HexStr(encrypt(padStr(strIn).getBytes()));

        }

        public static byte[] encrypt(string str, string key)
        {
            DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
            provider.Mode = System.Security.Cryptography.CipherMode.ECB;
            provider.Key = Encoding.ASCII.GetBytes(key.Substring(0, 8));
            provider.IV = Encoding.ASCII.GetBytes(key.Substring(0, 8));
            byte[] bytes = Encoding.GetEncoding("GB2312").GetBytes(str);
            MemoryStream stream = new MemoryStream();
            CryptoStream stream2 = new CryptoStream(stream, provider.CreateEncryptor(), CryptoStreamMode.Write);
            stream2.Write(bytes, 0, bytes.Length);
            return stream.ToArray();
        }
        public static String padStr(String sourceData)
        {
            byte[] bytes = Encoding.GetEncoding("GB2312").GetBytes(sourceData);
            int n = (8 - (bytes.Length) % 8);
            if (n > 0 && n != 8)
            {
                for (int i = 0; i < n; i++)
                    sourceData = sourceData + " ";
            }
            return sourceData;
        }
        /// <summary>
        /// 加密算法-适用于java解密，不足8的倍数已补足空格
        /// </summary>
        /// <param name="Text"></param>
        /// <param name="sKey"></param>
        /// <returns></returns>
        public static string Encrypt(string Text, string sKey)
        {
            return byteArr2HexStr(encrypt(padStr(Text), sKey));
        }

调用：

Encrypt("待加密字符串","密钥");