批量下载文件，打包成zip压缩包

来源：互联网发布：java工程师月薪编辑：程序博客网时间：2024/05/17 07:02

批量下载文件，用程序打成zip压缩包在下载

前台传来要下载的url数组

@RequestMapping(value = "/download",method = RequestMethod.POST)  public void download(HttpServletResponse response,String [] filePathList) throws IOException{  // 通过response对象获取OutputStream流  OutputStream os = response.getOutputStream();  //获取zip的输出流          ZipOutputStream zos = new ZipOutputStream(os);  //定义输入流          BufferedInputStream bis = null;    try {  //循环url数组  for (String path : filePathList) {    //通过url地址获取连接  URL url = new URL(path);  HttpURLConnection conn = (HttpURLConnection) url.openConnection();    //设置超时间为3秒     conn.setConnectTimeout(3*1000);      //防止屏蔽程序抓取而返回403错误    conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");    conn.setRequestMethod("GET");  conn.connect();    //通过连接得到输入流    InputStream inputStream = conn.getInputStream();     //设置压缩后的zip文件名  String sourceFilePath = "zip.zip";    //设置content-disposition响应头控制浏览器弹出保存框，若没有此句则浏览器会直接打开并显示文件。  //中文名要经过URLEncoder.encode编码，否则虽然客户端能下载但显示的名字是乱码           response.setHeader("content-disposition", "attachment;filename="   + URLEncoder.encode(sourceFilePath, "UTF-8"));    byte[] buf = new byte[8192];          int len = 0;            //创建ZIP实体，并添加进压缩包            ZipEntry zipEntry = new ZipEntry(fileName);            zos.putNextEntry(zipEntry);            bis = new BufferedInputStream(inputStream, 1024*10);           while ((len = bis.read(buf)) > 0) {          //使用OutputStream将缓冲区的数据输出到客户端浏览器          zos.write(buf, 0, len);          }    }  } catch (Exception e) {  e.printStackTrace();  }finally{  if(null != zos) zos.close();  if(null != bis) bis.close();  }  }

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