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); } }