java对象序列化、gzip压缩解压缩、加密解密

有时在应用中需要将java对象序列化存储起来，有的需要压缩，有的需要加密

 

EncryptUtil.java

package org.test.demo;

import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

public class EncryptUtil {
    private final static String ENCRYPTKEY="0123456789";
    /**
     *
      * @Title: getEncryptKey
      * @Description: 检验加密key
      * @param encryptKey
      * @return
      * String
      *
     */
    private static String getEncryptKey(String encryptKey){
        if(null==encryptKey || "".equals(encryptKey)) return ENCRYPTKEY;
        return encryptKey;
    }

    /**
     *
      * @Title: encrypt
      * @Description: 加密:普通java字串加密成16进制字串(String -> Byte -> HexStr)
      * @param content 要加密处理的字串
      * @param encryptKey 加密密钥
      * @return
      * String
      *
     */
    public static String encrypt(String content, String encryptKey){
        byte[] encryptResult = encryptStrToByte(content, getEncryptKey(encryptKey));
        return parseByte2HexStr(encryptResult);
    }
    /**
     *
      * @Title: decrypt
      * @Description: 加密:16进制字串解密成普通java字串(HexStr -> Byte ->String)
      * @param content 要解密处理的16进制字串
      * @param encryptKey 解密密钥
      * @return
      * String
      *
     */
    public static String decrypt(String content, String encryptKey){
        byte[] decryptFrom = parseHexStr2Byte(content);
        byte[] decryptResult = decrypt(decryptFrom,getEncryptKey(encryptKey));
        return new String(decryptResult);
    }
    /**
    * 加密:字串 --> 二进制
    * @param content 需要加密的内容
    * @param password 加密密码
    * @return
    */
    private static byte[] encryptStrToByte(String content, String password) {
        try {
            KeyGenerator kgen = KeyGenerator.getInstance("AES");
            kgen.init(128, new SecureRandom(password.getBytes()));
            SecretKey secretKey = kgen.generateKey();
            byte[] enCodeFormat = secretKey.getEncoded();
            SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
            Cipher cipher = Cipher.getInstance("AES");// 创建密码器
            byte[] byteContent = content.getBytes("utf-8");
            cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化
            byte[] result = cipher.doFinal(byteContent);
            return result; // 加密
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**解密
    * @param content 待解密内容
    * @param password 解密密钥
    * @return
    */
    private static byte[] decrypt(byte[] content, String password) {
        try {
            KeyGenerator kgen = KeyGenerator.getInstance("AES");
            kgen.init(128, new SecureRandom(password.getBytes()));
            SecretKey secretKey = kgen.generateKey();
            byte[] enCodeFormat = secretKey.getEncoded();
            SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
            Cipher cipher = Cipher.getInstance("AES");// 创建密码器
            cipher.init(Cipher.DECRYPT_MODE, key);// 初始化
            byte[] result = cipher.doFinal(content);
            return result; // 加密
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**将二进制转换成16进制
    * @param buf
    * @return
    */
    private static String parseByte2HexStr(byte buf[]) {
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < buf.length; i++) {
            String hex = Integer.toHexString(buf[i] & 0xFF);
            if (hex.length() == 1) {
                hex = '0' + hex;
            }
            sb.append(hex.toUpperCase());
        }
        return sb.toString();
    }

    /**
     * 将16进制转换为二进制
     *
     * @param hexStr
     * @return
     */
    private static byte[] parseHexStr2Byte(String hexStr) {
        if (hexStr.length() < 1)
            return null;
        byte[] result = new byte[hexStr.length() / 2];
        for (int i = 0; i < hexStr.length() / 2; i++) {
            int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16);
            int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2),
                    16);
            result[i] = (byte) (high * 16 + low);
        }
        return result;
    }

}

 

GZipUtils.java

package org.test.demo;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

/**
 * GZIP工具
 *
 */
public abstract class GZipUtils {

    public static final int BUFFER = 1024;
    public static final String EXT = ".gz";

    /**
     * 数据压缩
     *
     * @param data
     * @return
     * @throws IOException
     * @throws Exception
     */
    public static byte[] compress(byte[] data) throws IOException {
        ByteArrayInputStream bais = new ByteArrayInputStream(data);
        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        // 压缩
        compress(bais, baos);

        byte[] output = baos.toByteArray();

        baos.flush();
        baos.close();

        bais.close();

        return output;
    }

    /**
     * 文件压缩
     *
     * @param file
     * @throws Exception
     */
    public static void compress(File file) throws Exception {
        compress(file, true);
    }

    /**
     * 文件压缩
     *
     * @param file
     * @param delete
     *            是否删除原始文件
     * @throws Exception
     */
    public static void compress(File file, boolean delete) throws Exception {
        FileInputStream fis = new FileInputStream(file);
        FileOutputStream fos = new FileOutputStream(file.getPath() + EXT);

        compress(fis, fos);

        fis.close();
        fos.flush();
        fos.close();

        if (delete) {
            file.delete();
        }
    }

    /**
     * 数据压缩
     *
     * @param is
     * @param os
     * @throws IOException
     * @throws Exception
     */
    public static void compress(InputStream is, OutputStream os) throws IOException
             {

        GZIPOutputStream gos = new GZIPOutputStream(os);

        int count;
        byte data[] = new byte[BUFFER];
        while ((count = is.read(data, 0, BUFFER)) != -1) {
            gos.write(data, 0, count);
        }

        gos.finish();

        gos.flush();
        gos.close();
    }

    /**
     * 文件压缩
     *
     * @param path
     * @throws Exception
     */
    public static void compress(String path) throws Exception {
        compress(path, true);
    }

    /**
     * 文件压缩
     *
     * @param path
     * @param delete
     *            是否删除原始文件
     * @throws Exception
     */
    public static void compress(String path, boolean delete) throws Exception {
        File file = new File(path);
        compress(file, delete);
    }

    /**
     * 数据解压缩
     *
     * @param data
     * @return
     * @throws IOException
     * @throws Exception
     */
    public static byte[] decompress(byte[] data) throws IOException {
        ByteArrayInputStream bais = new ByteArrayInputStream(data);
        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        // 解压缩

        decompress(bais, baos);

        data = baos.toByteArray();

        baos.flush();
        baos.close();

        bais.close();

        return data;
    }

    /**
     * 文件解压缩
     *
     * @param file
     * @throws Exception
     */
    public static void decompress(File file) throws Exception {
        decompress(file, true);
    }

    /**
     * 文件解压缩
     *
     * @param file
     * @param delete
     *            是否删除原始文件
     * @throws Exception
     */
    public static void decompress(File file, boolean delete) throws Exception {
        FileInputStream fis = new FileInputStream(file);
        FileOutputStream fos = new FileOutputStream(file.getPath().replace(EXT,
                ""));
        decompress(fis, fos);
        fis.close();
        fos.flush();
        fos.close();

        if (delete) {
            file.delete();
        }
    }

    /**
     * 数据解压缩
     *
     * @param is
     * @param os
     * @throws IOException
     * @throws Exception
     */
    public static void decompress(InputStream is, OutputStream os) throws IOException
             {

        GZIPInputStream gis = new GZIPInputStream(is);

        int count;
        byte data[] = new byte[BUFFER];
        while ((count = gis.read(data, 0, BUFFER)) != -1) {
            os.write(data, 0, count);
        }

        gis.close();
    }

    /**
     * 文件解压缩
     *
     * @param path
     * @throws Exception
     */
    public static void decompress(String path) throws Exception {
        decompress(path, true);
    }

    /**
     * 文件解压缩
     *
     * @param path
     * @param delete
     *            是否删除原始文件
     * @throws Exception
     */
    public static void decompress(String path, boolean delete) throws Exception {
        File file = new File(path);
        decompress(file, delete);
    }

}

 

SerializeUtil.java

package org.test.demo;

import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.UnsupportedEncodingException;
import java.util.Map;

/**
 * 于对java数据进行序列化和反序列化处理
 * @author:
 * @update: 2012-4-12 上午8:34:47
 */

public class SerializeUtil {

    public final static String CHARSET_ISO88591="iso-8859-1";
    /**
      * @Title: serialize
      * @Description: java对象序列化 <br>
      * eg:<br>
      *   Map<String,String> map = new HashMap<String,String>();<br>
      *   map.put("test","序列化");<br>
      *   String serializedMapStr=SerializeUtil.serialize(map);
      * @param original 要进行序列化的java对象
      * @return String 序列化的后的值
      * @throws IOException
      *
      *
      */
    public static String serialize(Object original) throws IOException {
        if(null==original) return null;
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);
        oos.writeObject(original);
        byte[] str = baos.toByteArray();
        oos.close();
        baos.close();
        return new String(str,CHARSET_ISO88591);
    }

    /**
      * @Title: deserialize
      * @Description: 序列化的String对象的反序列化<br>
      * 需要自己进行强制转换得到最终类型<br>
      * eg:<br>
      *   Map newmap = (Map)SerializeUtil.deserialize(serializedMapStr);
      * @param serializedstr 经序列化处理过的信息
      * @return Object 反序列化后生成的Object。<br>
      * @throws IOException
      * @throws UnsupportedEncodingException
      * @throws ClassNotFoundException
      *
      *
      */
    public static Object deserialize(String serializedstr) throws UnsupportedEncodingException, IOException, ClassNotFoundException{
        if(null==serializedstr)return null;
        BufferedInputStream bis=new BufferedInputStream(new ByteArrayInputStream(serializedstr.getBytes(CHARSET_ISO88591)));
        ObjectInputStream ois = new ObjectInputStream(bis);
        Object obj = ois.readObject();
        ois.close();
        bis.close();
        return obj;
    }

    public static byte[] objectToByteArray(Object original) throws IOException {
        if (null == original)
            return null;
        ByteArrayOutputStream bout = new ByteArrayOutputStream();
        try (ObjectOutputStream oout = new ObjectOutputStream(bout);) {
            oout.writeObject(original);
        }
        return bout.toByteArray();
    }


    @SuppressWarnings("unchecked")
    public static Map<String, Object> byteArrayToObject(byte[] bytearry) throws IOException, ClassNotFoundException {
        if (bytearry.length==0) return null;
        return (Map<String, Object>)new ObjectInputStream(new ByteArrayInputStream(bytearry)).readObject();
    }
}

当然你序列化的类型不一定就是map，也可能是其他类型，这个要根据你的实际需要来改写SerializeUtil.java，直接返回Object类型

 

测试类：

package org.util.test;

import java.util.Map;
import java.util.HashMap;
import javax.servlet.http.Cookie;
import junit.framework.TestCase;
import java.util.String;

import org.test.demo.EncryptUtil;
import org.test.demo.GZipUtils;
import org.test.demo.SerializeUtil;

public class MainTest extends TestCase{
    public void testToCookie() throws Exception{
            Map<String,Human> map = new HashMap<String,Human>();

            map.put("test", "test");
            map.put("test2", 123);
            map.put("test3", new Cookie("cookie","cookievalue"));

            String datatemp = new String(GZipUtils.compress(SerializeUtil.objectToByteArray(map)),SerializeUtil.CHARSET_ISO88591);
            String str = EncryptUtil.encrypt(datatemp, "123");
            System.out.println("加密后:"+str);
            String str2 = EncryptUtil.decrypt(str, "123");
            System.out.println("解密后"+SerializeUtil.byteArrayToObject(GZipUtils.decompress(str2.getBytes(SerializeUtil.CHARSET_ISO88591))));


    }

}