C#用DES加密JAVA用DES解密，JAVA用DES加密C#用DES解密的实现

这里贴出来的是可通用的C#与jav的DES加密类，希望对大家管用直接复制即可用
C#DES加密解密类

///<summary><![CDATA[加密解密帮助类]]></summary>    public class Help_Encrypt    {        ///<summary><![CDATA[字符串DES加密函数]]></summary>        ///<param name="str"><![CDATA[被加密字符串 ]]></param>        ///<param name="key"><![CDATA[密钥 ]]></param>         ///<returns><![CDATA[加密后字符串]]></returns>           public static string Encode(string str, string key)        {            try            {                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("GB2312").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();            }            catch (Exception) { return "xxxx"; }        }        ///<summary><![CDATA[字符串DES解密函数]]></summary>        ///<param name="str"><![CDATA[被解密字符串 ]]></param>        ///<param name="key"><![CDATA[密钥 ]]></param>         ///<returns><![CDATA[解密后字符串]]></returns>           public static string Decode(string str, string key)        {            try            {                DESCryptoServiceProvider provider = new DESCryptoServiceProvider();                provider.Key = Encoding.ASCII.GetBytes(key.Substring(0, 8));                provider.IV = Encoding.ASCII.GetBytes(key.Substring(0, 8));                byte[] buffer = new byte[str.Length / 2];                for (int i = 0; i < (str.Length / 2); i++)                {                    int num2 = Convert.ToInt32(str.Substring(i * 2, 2), 0x10);                    buffer[i] = (byte)num2;                }                MemoryStream stream = new MemoryStream();                CryptoStream stream2 = new CryptoStream(stream, provider.CreateDecryptor(), CryptoStreamMode.Write);                stream2.Write(buffer, 0, buffer.Length);                stream2.FlushFinalBlock();                stream.Close();                return Encoding.GetEncoding("GB2312").GetString(stream.ToArray());            }            catch (Exception) { return ""; }        }    }JAVADES加密解密类package com.bgxt.messages;import java.io.UnsupportedEncodingException;import java.security.*;import javax.crypto.Cipher;import javax.crypto.SecretKey;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.DESKeySpec; import javax.crypto.spec.IvParameterSpec;/*** 字符串工具集合* @author Liudong*/public class StringUtils {private static final String PASSWORD_CRYPT_KEY = XmlUtil.getConfig().getPasswdKey().substring(0,8); //private final static String DES = "DES"; //private static final byte[] desKey;  //解密数据   public static String decrypt(String message,String key) throws Exception {                   byte[] bytesrc =convertHexString(message);              Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");               DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));              SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");              SecretKey secretKey = keyFactory.generateSecret(desKeySpec);              IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));           cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);                 byte[] retByte = cipher.doFinal(bytesrc);                return new String(retByte);    }  public static byte[] encrypt(String message, String key)           throws Exception {       Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");      DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));      SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");       SecretKey secretKey = keyFactory.generateSecret(desKeySpec);       IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));       cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);      return cipher.doFinal(message.getBytes("UTF-8"));   }  public static String encrypt(String value){String result="";try{value=java.net.URLEncoder.encode(value, "utf-8"); result=toHexString(encrypt(value, PASSWORD_CRYPT_KEY)).toUpperCase();}catch(Exception ex){   ex.printStackTrace();   return "";}return result; }public static byte[] convertHexString(String ss)    {    byte digest[] = new byte[ss.length() / 2];    for(int i = 0; i < digest.length; i++)    {    String byteString = ss.substring(2 * i, 2 * i + 2);    int byteValue = Integer.parseInt(byteString, 16);    digest[i] = (byte)byteValue;    }    return digest;    }   public static String toHexString(byte b[]) {       StringBuffer hexString = new StringBuffer();       for (int i = 0; i < b.length; i++) {           String plainText = Integer.toHexString(0xff & b[i]);           if (plainText.length() < 2)               plainText = "0" + plainText;           hexString.append(plainText);       }          return hexString.toString();   }   public static void main(String[] args) throws Exception {       String value="01";       System.out.println("加密数据:"+value);     System.out.println("密码为:"+XmlUtil.getConfig().getPasswdKey());     String a=encrypt( value);       System.out.println("加密后的数据为:"+a);   }   }