利用DES，C#加密，Java解密代码

  //C#加密
  /// <summary>
        /// 进行DES加密。
        /// </summary>
        /// <param name="pToEncrypt">要加密的字符串。</param>
        /// <param name="sKey">密钥，且必须为8位。</param>
        /// <returns>以Base64格式返回的加密字符串。</returns>
          public static string Encode(string str)
        {
            string keyXml = CommonMethor.GetEncrptKeyByRpt(Contant.contantUrl+"api/sys/getEncrptKey");
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(keyXml);
            XmlNode root = doc.SelectSingleNode("string");//当节点Workflow带有属性是，使用SelectSingleNode无法读取 

            string key = root.LastChild.InnerText;
            DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
            provider.Key = Encoding.ASCII.GetBytes(key.Substring(0, 8));
            provider.IV = Encoding.ASCII.GetBytes(key.Substring(0, 8));
            byte[] bytes = Encoding.GetEncoding("UTF-8").GetBytes(str);
            MemoryStream stream = new MemoryStream();
            CryptoStream stream2 = new CryptoStream(stream, provider.CreateEncryptor(), CryptoStreamMode.Write);
            stream2.Write(bytes, 0, bytes.Length);
            stream2.FlushFinalBlock();
            StringBuilder builder = new StringBuilder();
            foreach (byte num in stream.ToArray())
            {
                builder.AppendFormat("{0:X2}", num);
            }
            stream.Close();
            return builder.ToString();
            }

java解密

public static void main(String[] args) {
//        String decryptToken = null;
//        String key = "[email protected]";
//        String token = "C36B90D474184911EE21D4330730847E50F34F57DB92D38AA083AA66064F658C";
//        try
//        {
//            decryptToken = ClientUtils.decrypt(token,key);
//            decryptToken = java.net.URLDecoder.decode(decryptToken, "utf-8");
//            System.out.println("加密串为[" + token + "],解密后为[" + decryptToken + "]");
//        } catch (Exception e)
//        {
//            e.printStackTrace();
//        }
    }