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 ssages;
import java.io.UnsupportedEncodingException;
import java.security.*;
pto.Cipher;
pto.SecretKey;
pto.SecretKeyFactory;
pto.spec.DESKeySpec;
pto.spec.IvParameterSpec;
/**
* 字符串工具集合
* @author Liudong
*/
public class StringUtils {
private static final String PASSWORD_CRYPT_KEY =
//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 = Instance("DES/CBC/PKCS5Padding");
DESKeySpec desKeySpec = new Bytes("UTF-8"));
SecretKeyFactory keyFactory = Instance("DES");
SecretKey secretKey = ateSecret(desKeySpec);
IvParameterSpec iv = new Bytes("UTF-8"));
cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);
byte[] retByte = cipher.doFinal(bytesrc);
return new String(retByte);
}
java加密方式有哪些public static byte[] encrypt(String message, String key)
throws Exception {
Cipher cipher = Instance("DES/CBC/PKCS5Padding");
DESKeySpec desKeySpec = new Bytes("UTF-8"));
SecretKeyFactory keyFactory = Instance("DES");
SecretKey secretKey = ateSecret(desKeySpec);
IvParameterSpec iv = new Bytes("UTF-8"));
cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);
return cipher.Bytes("UTF-8"));
}
public static String encrypt(String value){
String result="";
try{
value=de(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 = HexString(0xff & b[i]);
if (plainText.length() < 2)
plainText = "0" + plainText;
hexString.append(plainText);
}
String();
}
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:"+Config().getPasswdKey());
String a=encrypt( value);
System.out.println("加密后的数据为:"+a);
}
}

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