java 压缩解压类

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;

public class ZipUtil {
    static final int BUFFER = 2048;

    public static void zip(String zipFileName, String sourcePath) {
        try {
            BufferedInputStream origin = null;
            FileOutputStream dest = new FileOutputStream(zipFileName);
            ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(
                    dest));
            byte data[] = new byte[BUFFER];
            File f = new File(sourcePath);
            File files[] = f.listFiles();
            for (int i = 0; i < files.length; i++) {
                FileInputStream fi = new FileInputStream(files[i]);
                origin = new BufferedInputStream(fi, BUFFER);
                ZipEntry entry = new ZipEntry(files[i].getName());
                out.putNextEntry(entry);
                int count;
                while ((count = origin.read(data, 0, BUFFER)) != -1) {
                    out.write(data, 0, count);
                }
                origin.close();
            }
            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void unzip(String zipFileName, String targetPath) {
        try {
            ZipFile zipFile = new ZipFile(zipFileName);
            Enumeration emu = zipFile.entries();
            int i = 0;
            while (emu.hasMoreElements()) {
                ZipEntry entry = (ZipEntry) emu.nextElement();

                if (entry.isDirectory()) {
                    new File(targetPath + entry.getName()).mkdirs();
                    continue;
                }
                BufferedInputStream bis = new BufferedInputStream(zipFile
                        .getInputStream(entry));
                File file = new File(targetPath +"/"+ entry.getName());

                File parent = file.getParentFile();
                if (parent != null && (!parent.exists())) {
                    parent.mkdirs();
                }
                FileOutputStream fos = new FileOutputStream(file);
                BufferedOutputStream bos = new BufferedOutputStream(fos, BUFFER);
                int count;
                byte data[] = new byte[BUFFER];
                while ((count = bis.read(data, 0, BUFFER)) != -1) {
                    bos.write(data, 0, count);
                }
                bos.flush();
                bos.close();
                bis.close();
            }
            zipFile.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 将一个文件夹下的所有zip文件按照原目录层级全部解压
     * @param dir 原文件夹
     */
    public static void unzipDir(String dir) {
        ArrayList list=FileUtil.getFileList(dir,"zip");
        for (Object object : list) {
            String fileName=object.toString();
            System.out.println(fileName);
            String unzipDir=FileUtil.getFilePathWithoutSuffix(fileName);
            if(!(new File(unzipDir).isDirectory())) {
                new File(unzipDir).mkdir();
            }
            ZipUtil.unzip(fileName,unzipDir);
        }
    }
    
    public static void main(String argv[]) {
        unzipDir("e:/temp");
    }
}