Java 下载zip文件

选中文件打zip包下载

前台：文件列表，选中文件，传文件ID集合传到后台

后台：

//接受到文件ID集合，查询出文件urlList

List attachFileList = bookService.findAttachFileList(ids);

List strFiles = new ArrayList();

for(AttachFile attachFile : attachFileList){

strFiles.add(attachFile.getAttachFileUrl());

}

//调用打包工具类进行下载

ZipUtil.ZipFiles(getRequest(), getResponse(), strFiles, UUID.randomUUID().toString()+”.zip”);

直接下载zip包 zipUtil也有

/zipUtil ↓↓↓

package com.jk.book.util;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.tools.zip.ZipEntry;

import org.apache.tools.zip.ZipOutputStream;

public class ZipUtil {

/**

• 把文件打成压缩包并保存在本地硬盘

• @param srcfile

• @param zipPath

*/

public static void ZipFiles(List srcfiles, String zipPath) {

byte[] buf = new byte[4096];

ZipOutputStream out = null;

try {

  // 创建zip输出流

  out = new ZipOutputStream(new FileOutputStream(zipPath));

  // 循环将源文件列表添加到zip文件中

  for (int i = 0; i < srcfiles.size(); i++) {

File file = new File(srcfiles.get(i));

    FileInputStream in = new FileInputStream(file);

    String fileName = file.getName();

    // 将文件名作为zip的Entry存入zip文件中

    out.putNextEntry(new ZipEntry(fileName));

    int len;

    while ( (len = in.read(buf)) > 0) {

      out.write(buf, 0, len);

    }

    out.closeEntry();

    in.close();

  }

}

catch (IOException e) {

  e.printStackTrace();

} finally {

if (null != out) {

try {

out.close();

out = null;

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}

/**

• 把文件打成压缩包并输出到客户端浏览器中

• @param request

• @param response

• @param srcFiles

• @param downloadZipFileName

*/

public static void ZipFiles(HttpServletRequest request, HttpServletResponse response, List srcFiles, String downloadZipFileName) {

byte[] buf = new byte[4096];

try {

  // Create the ZIP file

// ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipPath));

ZipOutputStream out = new ZipOutputStream(response.getOutputStream());//--设置成这样可以不用保存在本地，再输出， 通过response流输出,直接输出到客户端浏览器中。

  // Compress the files

if (request.getHeader("User-Agent").toLowerCase().indexOf("firefox") > 0) {

downloadZipFileName = new String(downloadZipFileName.getBytes("GB2312"),"ISO-8859-1");

    } else {

    // 对文件名进行编码处理中文问题

    downloadZipFileName = java.net.URLEncoder.encode(downloadZipFileName, "UTF-8");// 处理中文文件名的问题

    downloadZipFileName = new String(downloadZipFileName.getBytes("UTF-8"), "GBK");// 处理中文文件名的问题

    }

response.reset(); // 重点突出

    response.setCharacterEncoding("UTF-8"); // 重点突出

    response.setContentType("application/x-msdownload");// 不同类型的文件对应不同的MIME类型 // 重点突出

    // inline在浏览器中直接显示，不提示用户下载

    // attachment弹出对话框，提示用户进行下载保存本地

    // 默认为inline方式

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

  for (int i = 0; i < srcFiles.size(); i++) {

File file = new File(srcFiles.get(i));

    FileInputStream in = new FileInputStream(file);

    // Add ZIP entry to output stream.

    String fileName = file.getName();

    out.putNextEntry(new ZipEntry(fileName));

    // Transfer bytes from the file to the ZIP file

    int len;

    while ( (len = in.read(buf)) > 0) {

      out.write(buf, 0, len);

    }

    // Complete the entry

    out.closeEntry();

    in.close();

  }

  // Complete the ZIP file

  out.close();

  System.out.println("压缩完成.");

}

catch (IOException e) {

  e.printStackTrace();

}

}

public static void main(String[] args) {

List srcFiles = new ArrayList();

srcFiles.add(“c:/codetemplates.xml”);

srcFiles.add(“d:/t1.png”);

ZipFiles(srcFiles, “c:/mm.zip”);

}

}

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