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
ListattachFileList = bookService.findAttachFileList(ids);
ListstrFiles = 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(Listsrcfiles, 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, ListsrcFiles, 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) {
ListsrcFiles = new ArrayList();
srcFiles.add("c:/codetemplates.xml");
srcFiles.add("d:/t1.png");
ZipFiles(srcFiles, "c:/mm.zip");
}
}