java多文件打包下载

引用

java自带的类库，实现zip压缩打包文件下载，注：不支持中文文件名(下面是我的完整下载servlet下载类代码，改下自己的包名即可使用)

Java代码


package com.kedacom.kdkk.controller.querymanager;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.util.Date;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.util.zip.*;

public class BatchDownload extends HttpServlet {

public BatchDownload() {

super();

}

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

response.setContentType("APPLICATION/OCTET-STREAM");

response.setHeader("Content-Disposition","attachment; filename="+this.getZipFilename());

System.out.println("in BatchDownload................");

ZipOutputStream zos = new ZipOutputStream(response.getOutputStream());

File[] files = new File[2];

files[0]=new File("D:/OptiCM-POC/KDKK3Project/KDKK/images/1.jpg");

files[1]=new File("D:/OptiCM-POC/KDKK3Project/KDKK/images/2.jpg");

zipFile(files, "", zos);

zos.flush();

zos.close();

}

private void zipFile(File[] subs, String baseName, ZipOutputStream zos) throws IOException {

for (int i=0;i<subs.length;i++) {

File f=subs[i];

zos.putNextEntry(new ZipEntry(baseName + f.getName()));

FileInputStream fis = new FileInputStream(f);

byte[] buffer = new byte[1024];

int r = 0;

while ((r = fis.read(buffer)) != -1) {

zos.write(buffer, 0, r);

}

fis.close();

}

}

private String getZipFilename(){

Date date=new Date();

String s=date.getTime()+".zip";

return s;

}

public void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

this.doGet(request, response);

}

}

引用

下面是web.xml里面对下载zip servlet的配置

Java代码


<servlet>

<servlet-name>imgZipDownload</servlet-name>

<servlet-class>com.kedacom.kdkk.controller.querymanager.BatchDownload</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>imgZipDownload</servlet-name>

<url-pattern>/zipDownload.do</url-pattern>

</servlet-mapping>

引用

下面是页面调用servlet

Java代码


<form action="zipDownload.do" method="post">

<input type="submit" value="下载"/>

</form>