java DES加密工具类

package com.qingyu.pay.common.utils;

import javax.crypto.*;
import javax.crypto.spec.DESKeySpec;

import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.spec.InvalidKeySpecException;

/**
* <p>
* des对称加密
* </p>
*
* @author 905001561
*/
public class DESCrypto {
/**
* 加密
*
* @param datasource 待加密数据
* @param key
* @return byte数组
*/
public static byte[] enCrypto(byte[] datasource, String key) throws InvalidKeyException, NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, BadPaddingException, IllegalBlockSizeException {

SecureRandom random = new SecureRandom();
DESKeySpec desKey = new DESKeySpec(key.getBytes());
// 创建一个密匙工厂，然后用它把DESKeySpec转换成
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey securekey = keyFactory.generateSecret(desKey);
// Cipher对象实际完成加密操作
Cipher cipher = Cipher.getInstance("DES");
// 用密匙初始化Cipher对象
cipher.init(Cipher.ENCRYPT_MODE, securekey, random);
// 现在，获取数据并加密
// 正式执行加密操作
return cipher.doFinal(datasource);

}

/**
* 解密
*
* @param src
* @param key
* @return byte数组
*/
public static byte[] deCrypt(byte[] src, String key) throws InvalidKeyException, NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, BadPaddingException, IllegalBlockSizeException {
// DES算法要求有一个可信任的随机数源
SecureRandom random = new SecureRandom();

// 创建一个DESKeySpec对象
DESKeySpec desKey = new DESKeySpec(key.getBytes());
// 创建一个密匙工厂
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
// 将DESKeySpec对象转换成SecretKey对象
SecretKey securekey = keyFactory.generateSecret(desKey);
// Cipher对象实际完成解密操作
Cipher cipher = Cipher.getInstance("DES");
// 用密匙初始化Cipher对象
cipher.init(Cipher.DECRYPT_MODE, securekey, random);
// 真正开始解密操作
return cipher.doFinal(src);

}

}