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);  
}  
}