DES加密 解密算法 / DES加密 解密工具类

package com.miku.qx.control;//改为自己的包路径

import java.io.IOException;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import org.apache.commons.codec.binary.Base64;

import sun.misc.BASE64Decoder;

/**
 * DES加密 解密算法
 *
 * @author lifq
 * @date 2015-3-17 上午10:12:11
 */
public class DESUtil {

    /**
     * Description 根据键值进行解密
     *
     * @param data
     *            加密键byte数组
     * @return
     * @throws IOException
     * @throws Exception
     */
    public static String decrypt(String data, String secretKey) throws IOException,
            Exception {
        if (data == null)
            return null;
        DESedeKeySpec keySpec = new DESedeKeySpec(secretKey.getBytes("UTF-8"));
        SecretKey key = SecretKeyFactory.getInstance("DESede").generateSecret(keySpec);
        //获取解密对象
        Cipher cipher = Cipher.getInstance("DESede");
        //初始化解密信息
        cipher.init(Cipher.DECRYPT_MODE, key);
        //基于BASE64编码，接收byte[] 并转换成String
        BASE64Decoder base64decoder = new BASE64Decoder();
        //将字符串decode成byte[]
        byte[] bytes = base64decoder.decodeBuffer(data);
        //解密
        byte[] doFinal = cipher.doFinal(bytes);
        //返回解密之后的信息
        String jm= new String(doFinal, "UTF-8");
        System.out.println("DESUtil.decrypt--data:"+data+"----jm:"+jm);
        return jm;
    }

    /**
     * 加密
     * @param data
     * @param secretKey
     * @return
     * @throws IOException
     * @throws Exception
     */
    public static String encrypt(String data, String secretKey) throws IOException,
            Exception {
        if (data == null)
            return null;
        DESedeKeySpec keySpec = new DESedeKeySpec(secretKey.getBytes("UTF-8"));
        SecretKey key = SecretKeyFactory.getInstance("DESede").generateSecret(keySpec);
        Cipher cipher = Cipher.getInstance("DESede");
        cipher.init(Cipher.ENCRYPT_MODE, key);
        long timestr = System.currentTimeMillis();
        String temp = data+"-"+ timestr;

        byte[] utfData = temp.getBytes("UTF-8");
        byte[] encryptedText = cipher.doFinal(utfData);
        String token = new String(Base64.encodeBase64(encryptedText));
        System.out.println("DESUtil.encrypt--data:"+data+"----token:"+token);
        return token;
    }

}