解压Zip

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;

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

/**
 * 可以处理中文文件名
 */
public class UnZip2
{
    private static final int buffer = 2048;

    public static void main(String[] args)
    {
        unZip("D:\\ss\\test.zip");
    }

    public static void unZip(String path)
    {
        int count = -1;
        int index = -1;
        String savepath = "";
        boolean flag = false;

        File file = null;
        InputStream is = null;
        FileOutputStream fos = null;
        BufferedOutputStream bos = null;

        savepath = path.substring(0, path.lastIndexOf("\\")) + "\\";

        try
        {
            ZipFile zipFile = new ZipFile(path); 

            Enumeration<?> entries = zipFile.getEntries();

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

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

                String filename = entry.getName();
                index = filename.lastIndexOf("/");
                if(index > -1)
                    filename = filename.substring(index+1);

                filename = savepath + filename;

                flag = isPics(filename);
                if(!flag)
                    continue;

                file = new File(filename);
                file.createNewFile();

                is = zipFile.getInputStream(entry); 

                fos = new FileOutputStream(file);
                bos = new BufferedOutputStream(fos, buffer);

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

                fos.close(); 

                is.close();
            } 

            zipFile.close(); 

        }catch(IOException ioe){
            ioe.printStackTrace();
        }
    } 

    public static boolean isPics(String filename)
    {
        boolean flag = false;

        if(filename.endsWith(".jpg") || filename.endsWith(".gif")  || filename.endsWith(".bmp") || filename.endsWith(".png"))
            flag = true;

        return flag;
    }
}

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class ImageFileService {
        private static final int buffer = 2048;

        public static void main(String[] args) {
            unZip("D:\\YXDoc\\20131212001.zip");
        }

        public static void unZip(String path) {
            int count = -1;
            int index = -1;

            String savepath = "";
            boolean flag = false;
            // 解压路径
            savepath = path.substring(0, path.lastIndexOf("\\")) + "\\";
            try {
                BufferedOutputStream bos = null;
                ZipEntry entry = null;
                FileInputStream fis = new FileInputStream(path);
                ZipInputStream zis = new ZipInputStream(
                        new BufferedInputStream(fis));

                while ((entry = zis.getNextEntry()) != null) {
                    byte data[] = new byte[buffer];
                    String temp = entry.getName();
                    flag = isPics(temp);
                    if (!flag)
                        continue;
                    index = temp.lastIndexOf("/");
                    if (index > -1)
                        temp = temp.substring(index + 1);
                    temp = savepath + temp;
                    File f = new File(temp);
                    f.createNewFile();
                    FileOutputStream fos = new FileOutputStream(f);
                    bos = new BufferedOutputStream(fos, buffer);
                    while ((count = zis.read(data, 0, buffer)) != -1) {
                        bos.write(data, 0, count);
                    }
                    bos.flush();
                    bos.close();
                }
                zis.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        public static boolean isPics(String filename) {
            boolean flag = false;
            if (filename.endsWith(".jpg") || filename.endsWith(".gif")
                    || filename.endsWith(".bmp") || filename.endsWith(".png"))
                flag = true;
            return flag;
        }
}

<%@ page language="java" import="java.util.*,java.io.*" pageEncoding="GBK"%>
<%
String path =request.getContextPath();
String basePath =request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
String localPath=(String)request.getAttribute("localPath");
String fileName=(String)request.getAttribute("fileName");
localPath="D://";
fileName="12323.pdf";

%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
</head>
<% out.clear();
   out = pageContext.pushBody();
   response.setContentType("application/pdf");
   try {
    String sourcePDFPath =localPath+fileName;
    //判断该路径下的文件是否存在
    File file = new File(sourcePDFPath);
    if (file.exists()){
      DataOutputStream ou = new DataOutputStream(response.getOutputStream());
      DataInputStream in = new DataInputStream(new FileInputStream(sourcePDFPath));
      byte[] b = new byte[2048];
      while ((in.read(b)) != -1){
         ou.write(b);
         ou.flush();
      }
      in.close();
      ou.close();
    }else{
     out.print(sourcePDFPath + " 文件不存在!");
    }
   }catch (Exception e) {
     out.println(e.getMessage());
   }%>
<body>
</body>
</html>