java中3DES+Base64解密

//3DES算法，CBC模式無填充方式解密過程

public static String decryptMode( byte[] src) throws Exception {
  String decryptByte = null;
  final String keyBase64 = "Base64編碼後的key";
  final String ivBase64 = "Base64編碼後的iv向量";
  byte[] keybyte = getFromBASE64(keyBase64);
  byte[] ivbyte = getFromBASE64(ivBase64);
  SecureRandom sr = new SecureRandom();
  DESedeKeySpec dks = new DESedeKeySpec(keybyte);
  SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");
  SecretKey securekey = keyFactory.generateSecret(dks);
  IvParameterSpec iv = new IvParameterSpec(ivbyte);
  Cipher cipher = Cipher.getInstance("DESede/CBC/NoPadding");
  cipher.init(Cipher.DECRYPT_MODE, securekey, iv);
  decryptByte = new String(cipher.doFinal(src),"UTF-8");
  return decryptByte;
 }
 // 將 BASE64 編碼的字符串s 進行解碼
 public static byte[] getFromBASE64(String s) throws Exception {
        return (new BASE64Decoder()).decodeBuffer(s);
    }

參考了：http://www.cnblogs.com/AloneSword/p/3316421.html