java DES 加密解密DEMO

import java.security.SecureRandom;import javax.crypto.Cipher;import javax.crypto.SecretKey;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.DESKeySpec;public class DESHelper { /** * 加解密接口，根据参数flag进行加密或解密操作 * @param data 数据字节 * @param password 加密解密密码8位或8的倍数 * @param flag 0：加密，1：解密 * @return */ public static byte[] doWork(byte[] data, String password,int flag) { try { SecureRandom random = new SecureRandom(); DESKeySpec desKey = new DESKeySpec(password.getBytes()); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES"); SecretKey securekey = keyFactory.generateSecret(desKey); Cipher cipher = Cipher.getInstance("DES"); // 用密匙初始化Cipher对象 if(flag == 0){ cipher.init(Cipher.ENCRYPT_MODE, securekey, random); }else{ cipher.init(Cipher.DECRYPT_MODE, securekey, random); } return cipher.doFinal(data); } catch (Exception e) { e.printStackTrace(); } return null; } /** * test * @param args */ public static void main(String[] args) { try { // 需加密内容 String str = "mobile:[phone]|type:0|content:去中山路怎么走"; // 密码，长度要是8的倍数 String password = "01010101"; byte[] desResult = DESHelper.doWork(str.getBytes(), password,0); System.out.println("加密后密文：" + new String(desResult)); // 直接将如上内容解密 byte[] sourResult = DESHelper.doWork(desResult, password,1); System.out.println("解密后名为：" + new String(sourResult)); } catch (Exception e1) { e1.printStackTrace(); } }}