import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;public class Des
{private 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 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 void main(String[] args) throws Exception
{String key = "12345678";String value="test1234 ";String jiami=java.net.URLEncoder.encode(value, "utf-8").toLowerCase();System.out.println("加密数据:"+jiami);String a=toHexString(encrypt(jiami, key)).toUpperCase();System.out.println("加密后的数据为:"+a);String b=java.net.URLDecoder.decode(decrypt(a,key), "utf-8") ;System.out.println("解密后的数据:"+b);}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();
}}

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Security.Cryptography;
using System.IO;
using System.Text;
public class TestDes
{//cookies加密密钥public static string DES_Key = "12345678";#region DESEnCode DES加密public static string DESEnCode(string pToEncrypt, string sKey){pToEncrypt = HttpContext.Current.Server.UrlEncode(pToEncrypt);DESCryptoServiceProvider des = new DESCryptoServiceProvider();byte[] inputByteArray = Encoding.GetEncoding("UTF-8").GetBytes(pToEncrypt);des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);MemoryStream ms = new MemoryStream();CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);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();}#endregion#region DESDeCode DES解密public static string DESDeCode(string pToDecrypt, string sKey){// HttpContext.Current.Response.Write(pToDecrypt + "<br>" + sKey);// HttpContext.Current.Response.End();DESCryptoServiceProvider des = new DESCryptoServiceProvider();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 = ASCIIEncoding.ASCII.GetBytes(sKey);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 HttpContext.Current.Server.UrlDecode(System.Text.Encoding.Default.GetString(ms.ToArray()));}#endregionpublic TestDes(){//// TODO: 在此处添加构造函数逻辑//
    }
}