java 压缩(解压)文件或者文件夹工具类

用的是jdk自带的类，不需要导入其他jar

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.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipOutputStream;

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;

public class ZipUtil {
    /**
     * 解压到指定目录
     * 
     * @param zipPath
     * @param descDir
     * @author isea533
     */
    @Deprecated
    public static void unZipFiles(String zipPath, String descDir)
            throws IOException {
        unZipFiles(new File(zipPath), descDir);
    }

    /**
     * 解压文件到指定目录
     * 
     * @param zipFile
     * @param descDir
     * @author isea533
     */
    @SuppressWarnings("rawtypes")
    public static void unZipFiles(File zipFile, String descDir)
            throws IOException {
        File pathFile = new File(descDir);
        if (!pathFile.exists()) {
            pathFile.mkdirs();
        }
        ZipFile zip = new ZipFile(zipFile);
        for (Enumeration entries = zip.getEntries(); entries.hasMoreElements();) {
            ZipEntry entry = (ZipEntry) entries.nextElement();
            String zipEntryName = entry.getName();
            InputStream in = zip.getInputStream(entry);
            String outPath = (descDir + zipEntryName).replaceAll("\\*", "/");
            outPath = new String(outPath.getBytes("utf-8"), "ISO8859-1");
            ;
            // 判断路径是否存在,不存在则创建文件路径
            File file = new File(outPath.substring(0, outPath.lastIndexOf('/')));
            if (!file.exists()) {
                file.mkdirs();
            }
            // 判断文件全路径是否为文件夹,如果是上面已经上传,不需要解压
            if (new File(outPath).isDirectory()) {
                continue;
            }
            // 输出文件路径信息
            //System.out.println(outPath);

            OutputStream out = new FileOutputStream(outPath);
            byte[] buf1 = new byte[1024];
            int len;
            while ((len = in.read(buf1)) > 0) {
                out.write(buf1, 0, len);
            }
            in.close();
            out.close();
        }
    }

    /**
     * 递归压缩文件
     * 
     * @param source
     *            源路径,可以是文件,也可以目录
     * @param destinct
     *            目标路径,压缩文件名
     * @throws IOException
     */
    public static void compress(String source, String destinct)
            throws IOException {
        List fileList = loadFilename(new File(source));
        ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(
                new File(destinct)));

        byte[] buffere = new byte[8192];
        int length;
        BufferedInputStream bis;

        for (int i = 0; i < fileList.size(); i++) {
            File file = (File) fileList.get(i);
            zos.putNextEntry(new ZipEntry(getEntryName(source, file)));
            bis = new BufferedInputStream(new FileInputStream(file));

            while (true) {
                length = bis.read(buffere);
                if (length == -1)
                    break;
                zos.write(buffere, 0, length);
            }
            bis.close();
            zos.closeEntry();
        }
        zos.close();
    }

    /**
     * 递归获得该文件下所有文件名(不包括目录名)
     * 
     * @param file
     * @return
     */
    private static List loadFilename(File file) {
        List filenameList = new ArrayList();
        if (file.isFile()) {
            filenameList.add(file);
        }
        if (file.isDirectory()) {
            for (File f : file.listFiles()) {
                filenameList.addAll(loadFilename(f));
            }
        }
        return filenameList;
    }

    /**
     * 获得zip entry 字符串
     * 
     * @param base
     * @param file
     * @return
     */
    private static String getEntryName(String base, File file) {
        File baseFile = new File(base);
        String filename = file.getPath();
        // int index=filename.lastIndexOf(baseFile.getName());
        if (baseFile.getParentFile().getParentFile() == null)
            return filename.substring(baseFile.getParent().length());
        return filename.substring(baseFile.getParent().length() + 1);
    }

     public static void main(String[] args) throws IOException {
            //compress("D:/tomcat-5.5.20","d:/test/testZip.zip");
         unZip("D:/saas-plugin-web-master-shiro-mybatis.zip","D:/123");
     }

     private static final int buffer = 2048;   

   /**  
    * 解压Zip文件  
    * @param path 文件目录  
    */  
   public static void unZip(String path,String savepath)   
       {   
        int count = -1;   
        File file = null;   
        InputStream is = null;   
        FileOutputStream fos = null;   
        BufferedOutputStream bos = null;   
        new File(savepath).mkdir(); //创建保存目录   
        ZipFile zipFile = null;   
        try  
        {   
            zipFile = new ZipFile(path,"gbk"); //解决中文乱码问题   
            Enumeration<?> entries = zipFile.getEntries();   

            while(entries.hasMoreElements())   
            {   
                byte buf[] = new byte[buffer];   

                ZipEntry entry = (ZipEntry)entries.nextElement();   

                String filename = entry.getName();   
                boolean ismkdir = false;   
                if(filename.lastIndexOf("/") != -1){ //检查此文件是否带有文件夹   
                   ismkdir = true;   
                }   
                filename = savepath + filename;   

                if(entry.isDirectory()){ //如果是文件夹先创建   
                   file = new File(filename);   
                   file.mkdirs();   
                    continue;   
                }   
                file = new File(filename);   
                if(!file.exists()){ //如果是目录先创建   
                   if(ismkdir){   
                   new File(filename.substring(0, filename.lastIndexOf("/"))).mkdirs(); //目录先创建   
                   }   
                }   
                file.createNewFile(); //创建文件   

                is = zipFile.getInputStream(entry);   
                fos = new FileOutputStream(file);   
                bos = new BufferedOutputStream(fos, buffer);   

                while((count = is.read(buf)) > -1)   
                {   
                    bos.write(buf, 0, count);   
                }   
                bos.flush();   
                bos.close();   
                fos.close();   

                is.close();   
            }   

            zipFile.close();   

        }catch(IOException ioe){   
            ioe.printStackTrace();   
        }finally{   
               try{   
               if(bos != null){   
                   bos.close();   
               }   
               if(fos != null) {   
                   fos.close();   
               }   
               if(is != null){   
                   is.close();   
               }   
               if(zipFile != null){   
                   zipFile.close();   
               }   
               }catch(Exception e) {   
                   e.printStackTrace();   
               }   
           }   
       }    
}

使用：
下面是介绍压缩文件：

//原文件路径
String newPath= userPath + fileSeparator +followFile.getName();
//目标文件路径，拼接上压缩后的文件名
String after = zipAfter + fileSeparator + followFile.getName()+".zip";
// 压缩文件
ZipUtil.compress(newPath, after);