c#加密，java解密(3DES加密)

c#代码 

using System;
using System.Security;
using System.Security.Cryptography;
using System.IO;
using System.Text;
using System.Threading;namespace WebApplication2
{
 /// <summary>
 /// DES3 的摘要说明。
 /// </summary>
 public class DES3
 {
  public DES3()
  {
  }
   //密钥
   private const string sKey = "A3F2569DESJEIWBCJOTY45DYQWF68H1Y";   //矢量，矢量可以为空
   private const string sIV = "qcDY6X+aPLw=";   //构造一个对称算法
   private SymmetricAlgorithm mCSP = new TripleDESCryptoServiceProvider();
   #region public string EncryptString(string Value)   /// 加密字符串
   /// 输入的字符串
   /// 加密后的字符串
   public string EncryptString(string Value)   {
    ICryptoTransform ct;
    MemoryStream ms;
    CryptoStream cs;
    byte[] byt;
    mCSP.Key = Convert.FromBase64String(sKey);
    mCSP.IV = Convert.FromBase64String(sIV);    //指定加密的运算模式
    mCSP.Mode = System.Security.Cryptography.CipherMode.ECB;    //获取或设置加密算法的填充模式
    mCSP.Padding = System.Security.Cryptography.PaddingMode.PKCS7;
    ct = mCSP.CreateEncryptor(mCSP.Key, mCSP.IV);
    byt = Encoding.UTF8.GetBytes(Value);
    ms = new MemoryStream();
    cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);
    cs.Write(byt, 0, byt.Length);
    cs.FlushFinalBlock();
    cs.Close();
    return Convert.ToBase64String(ms.ToArray());
   }   #endregion
  } }

  java代码 

package des;import javax.crypto.Cipher;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import java.security.NoSuchAlgorithmException;
import sun.misc.*;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import javax.crypto.BadPaddingException;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.spec.SecretKeySpec;
import java.security.*;
import javax.crypto.SecretKeyFactory;
import java.security.spec.*;
import javax.crypto.spec.DESedeKeySpec;
/**
解密
 */
public class DES {
    private static String Algorithm = "DESede";//加密算法的名称
    private static Cipher c;//密码器
    private static byte[] cipherByte;
    private static SecretKey deskey;//密钥
    private static String keyString = "A3F2569DESJEIWBCJOTY45DYQWF68H1Y";//获得密钥的参数     //对base64编码的string解码成byte数组
     public byte[] deBase64(String parm) throws IOException {
        BASE64Decoder dec=new BASE64Decoder();
        byte[] dnParm = dec.decodeBuffer(parm);
        System.out.println(dnParm.length);
        System.out.println(dnParm);
        return dnParm;
     }
    //把密钥参数转为byte数组
     public byte[] dBase64(String parm) throws IOException {
        BASE64Decoder dec=new BASE64Decoder();
        byte[] dnParm = dec.decodeBuffer(parm);
        return dnParm;
     }    /**
     * 对 Byte 数组进行解密
     * @param buff 要解密的数据
     * @return 返回加密后的 String
     */
     public static String createDecryptor(byte[] buff) throws
      NoSuchPaddingException, NoSuchAlgorithmException,
      UnsupportedEncodingException {
        try {
           c.init(Cipher.DECRYPT_MODE, deskey);//初始化密码器，用密钥deskey,进入解密模式
           cipherByte = c.doFinal(buff);
        }
        catch(java.security.InvalidKeyException ex){
            ex.printStackTrace();
        }
        catch(javax.crypto.BadPaddingException ex){
            ex.printStackTrace();
        }
        catch(javax.crypto.IllegalBlockSizeException ex){
            ex.printStackTrace();
        }
        return (new String(cipherByte,"UTF-8"));
     }
     public void getKey(String key) throws IOException, InvalidKeyException,
      InvalidKeySpecException {
      byte[] dKey = dBase64(key);
        try {          deskey=new javax.crypto.spec.SecretKeySpec(dKey,Algorithm);
          c = Cipher.getInstance(Algorithm);
        }
        catch (NoSuchPaddingException ex) {
        }
        catch (NoSuchAlgorithmException ex) {
        }
     }
     public static void main(String args[]) throws IOException,
      NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeySpecException,
      InvalidKeyException, IOException {
       DES des = new DES();
       des.getKey(keyString);
       byte[] dBy = des.deBase64("1ZVasdJJco1qccDnnfQfb8QeaARxhkR6");
       String dStr = des.createDecryptor(dBy);
       System.out.println("解："+dStr);
     }
}

这个可以加解密，不限制加密字符长度