1.public static void main(String[] args) throws Exception {

        String cont = "";

        String cont2=jm(yjy(cont));

        if(cont.equals(cont2)){

            System.out.println("比对成功");

        }else{

            System.out.println("比对失败");

    public static String yjy(String cont) throws Exception {

        System.out.println("明文长度:" + cont.length());

        // 第一次压缩

        cont = ZipUtil2.compress(cont);

        System.out.println("压缩后:" + cont.length());

        // 第一次加密

        cont = DesUtil.encrypt(cont, DesUtil.PWD_KEY);

        System.out.println("加密长度:" + cont.length());

        // 第二次压缩

        cont = ZipUtil2.compress(cont);

        System.out.println("再压缩:" + cont.length());

        return cont;   

    public static String jm(String cont) throws Exception {

        System.out.println("-----------------------------");

        System.out.println("密文长度:" + cont.length());

        // 第一次解压缩

        cont = ZipUtil2.uncompress(cont);

        System.out.println("解压缩:" + cont.length());

        // 第一次解密

        cont = DesUtil.decrypt(cont, DesUtil.PWD_KEY);

        System.out.println("解密后:" + cont.length());

        // 第二次解压缩

        cont = ZipUtil2.uncompress(cont);

        System.out.println("再解压:" + cont.length());     

        return cont;

2.import java.io.IOException;

import java.security.SecureRandom;

import javax.crypto.Cipher;

import javax.crypto.SecretKey;

import javax.crypto.SecretKeyFactory;

import javax.crypto.spec.DESKeySpec;

import Decoder.BASE64Decoder;

import Decoder.BASE64Encoder;

public class DesUtil {

    private final static String DES = "DES";

    public final static String PWD_KEY = "MZTHPWDJM";

    public final static String ID_KEY = "MZTHIDJM";

    public static void main(String[] args) throws Exception {

        String data = "xkajsdasdk'al;ks'dl;kasl;d";

        System.err.println("加密:"+encrypt(data, PWD_KEY));

        System.err.println("解密:" +decrypt(encrypt(data, PWD_KEY), PWD_KEY));**

     * Description 根据键值进行加密 

     * @param data

     * @param key

     *            加密键byte数组

     * @return

     * @throws Exception

    public static String encrypt(String data, String key) throws Exception {

        byte[] bt = encrypt(data.getBytes(), key.getBytes());

        String strs = new BASE64Encoder().encode(bt);

        return strs;

     * Description 根据键值进行解密

     * @param data

     * @param key

     *            加密键byte数组

     * @return

     * @throws IOException

     * @throws Exception

     */

    public static String decrypt(String data, String key) throws IOException,

            Exception {

        if (data == null)

            return null;

        BASE64Decoder decoder = new BASE64Decoder();

        byte[] buf = decoder.decodeBuffer(data);

        byte[] bt = decrypt(buf, key.getBytes());

        return new String(bt);

     * Description 根据键值进行加密

     * @param data

     * @param key

     *            加密键byte数组

     * @return

     * @throws Exception/

    private static byte[] encrypt(byte[] data, byte[] key) throws Exception {

        // 生成一个可信任的随机数源

        SecureRandom sr = new SecureRandom();

        // 从原始密钥数据创建DESKeySpec对象

        DESKeySpec dks = new DESKeySpec(key);

        // 创建一个密钥工厂,然后用它把DESKeySpec转换成SecretKey对象

        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);

        SecretKey securekey = keyFactory.generateSecret(dks);

        // Cipher对象实际完成加密操作

        Cipher cipher = Cipher.getInstance(DES);

        // 用密钥初始化Cipher对象

        cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);

        return cipher.doFinal(data);

     * Description 根据键值进行解密

     * @param data

     * @param key

     *            加密键byte数组

     * @return http://www.huiyi8.com/jiaoben/

     * @throws Exception javascript特效

    private static byte[] decrypt(byte[] data, byte[] key) throws Exception {

        // 生成一个可信任的随机数源

        SecureRandom sr = new SecureRandom();

        // 从原始密钥数据创建DESKeySpec对象

        DESKeySpec dks = new DESKeySpec(key);

        // 创建一个密钥工厂,然后用它把DESKeySpec转换成SecretKey对象

        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);

        SecretKey securekey = keyFactory.generateSecret(dks);

        // Cipher对象实际完成解密操作

        Cipher cipher = Cipher.getInstance(DES);

        // 用密钥初始化Cipher对象

        cipher.init(Cipher.DECRYPT_MODE, securekey, sr);

        return cipher.doFinal(data);