Here you can find the source of encryptDESFile(byte[] encryptdata, String encryptKey)
public static byte[] encryptDESFile(byte[] encryptdata, String encryptKey) throws Exception
//package com.java2s; import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; public class Main { private static byte[] iv = { 1, 2, 3, 4, 5, 6, 7, 8 }; public static byte[] encryptDESFile(byte[] encryptdata, String encryptKey) throws Exception { IvParameterSpec zeroIv = new IvParameterSpec(iv); SecretKeySpec key = new SecretKeySpec(encryptKey.getBytes(), "DES"); Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv); byte[] encryptedData = cipher.doFinal(encryptdata); // return Base64.encode(encryptedData); return encryptedData; }//from w w w . j a v a 2 s . co m }