java后台批量下载文件并压缩成zip下载的方法

//checkbox 全选/取消全选 var isCheckAll = false; function swapCheck() { if (isCheckAll) { $("input[type='checkbox']").each(function() { this.checked = false; }); isCheckAll = false; } else { $("input[type='checkbox']").each(function() { this.checked = true; }); isCheckAll = true; } }

/** * 图片批量下载 * @param request * @param response * @return * @throws IOException */ public void downLoadPic(HttpServletRequest request,HttpServletResponse response) throws IOException{ //Map<String, Object> params = getParameters(request); String[] pictureIDs = request.getParameterValues("pictureID"); Authentication au=getAuthentication(request); service.downLoadPic(pictureIDs, au, request, response); return ; }

public void downLoadPic(String[] params,Authentication au,HttpServletRequest request,HttpServletResponse response) throws IOException { //压缩文件初始设置 String path=System.getProperty("ics.webapp.root");//这个是服务器路径地址，request.getSession().getServletContext().getRealPath() 也一样能 String fileZip = au.getUsername()+"-"+au.getAttribute("F_BRNO")+ "Pictures.zip"; String filePath = path+"\\" + fileZip;//之后用来生成zip文件 //filePathArr为根据前台传过来的信息，通过数据库查询所得出的pdf文件路径集合（具体到后缀） List<Map<String, Object>> fileNameArr = new ArrayList<Map<String,Object>>(); //JSONArray jsons = JSONArray.fromObject(params.get("pictureList")); /** *List<String> pictureIDs = new ArrayList<String>(); for(Object obj:jsons){ pictureIDs.add(obj.toString()); } */ for (int i = 0; i < params.length; i++) { Map<String, Object> speMap = new HashMap<String, Object>(); speMap.put("f_date", params[i].substring(0, 8)); speMap.put("f_ics_batch", params[i].substring(8)); List<Map<String, Object>> reclists=dao.queryLogInfo(speMap); for (int j = 0; j < reclists.size(); j++) { fileNameArr.add(reclists.get(j)); } } //需要压缩的文件--包括文件地址和文件名 //String[] pathtytytyt ={"D:\\13.jpg","D:\\1212.jpg"}; // 要生成的压缩文件地址和文件名称 //String desPath = "D:\\DOWNLOADS\\new.zip"; File zipFile = new File(filePath); ZipOutputStream zipStream = null; FileInputStream zipSource = null; BufferedInputStream bufferStream = null; try { //构造最终压缩包的输出流 zipStream = new ZipOutputStream(new FileOutputStream(zipFile)); for(int i =0;i<fileNameArr.size();i++){ File file = new File((String) fileNameArr.get(i).get("F_FILENAME")); //File file = new File(pathtytytyt[i]); //将需要压缩的文件格式化为输入流 zipSource = new FileInputStream(file); //压缩条目不是具体独立的文件，而是压缩包文件列表中的列表项，称为条目，就像索引一样 //这里的name就是文件名，文件名和之前的重复就会导致文件被覆盖，在这用i加文件名进行单一文件识别 ZipEntry zipEntry = new ZipEntry(i+file.getName()); //定位该压缩条目位置，开始写入文件到压缩包中 zipStream.putNextEntry(zipEntry); //输入缓冲流 bufferStream = new BufferedInputStream(zipSource, 1024 * 10); int read = 0; //创建读写缓冲区 byte[] buf = new byte[1024 * 10]; while((read = bufferStream.read(buf, 0, 1024 * 10)) != -1) { zipStream.write(buf, 0, read); } } } catch (Exception e) { e.printStackTrace(); } finally { //关闭流 try { if(null != bufferStream) bufferStream.close(); if(null != zipStream) zipStream.close(); if(null != zipSource) zipSource.close(); } catch (IOException e) { e.printStackTrace(); } } /** * 写流文件到前端浏览器 ServletOutputStream os = response.getOutputStream(); response.setContentType("application/x-octet-stream"); response.setContentLength((int) zipFile.length()); response.addHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileZip, "UTF-8")); BufferedInputStream bis = null; BufferedOutputStream bos = null; try { bis = new BufferedInputStream(new FileInputStream(filePath)); bos = new BufferedOutputStream(os); byte[] buff = new byte[2048]; int bytesRead; while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) { bos.write(buff, 0, bytesRead); } os.flush(); os.close(); } catch (IOException e) { throw e; } finally { if (bis != null) bis.close(); if (bos != null) bos.close(); File obj = new File(filePath); if (obj.exists()) { obj.delete();//删除服务器本地产生的临时压缩文件 } }*/ //进行浏览器下载 //获得浏览器代理信息 final String userAgent = request.getHeader("USER-AGENT"); //判断浏览器代理并分别设置响应给浏览器的编码格式 String finalFileName = null; if(StringUtils.contains(userAgent, "MSIE")||StringUtils.contains(userAgent,"Trident")){//IE浏览器 finalFileName = URLEncoder.encode(fileZip,"UTF-8"); System.out.println("IE浏览器"); }else if(StringUtils.contains(userAgent, "Mozilla")){//google,火狐浏览器 finalFileName = URLEncoder.encode(fileZip,"UTF-8"); }else{ finalFileName = URLEncoder.encode(fileZip,"UTF-8");//其他浏览器 } response.setContentType("application/x-octet-stream");//告知浏览器下载文件，而不是直接打开，浏览器默认为打开 response.setHeader("Content-Disposition" ,"attachment;filename=" +finalFileName);//下载文件的名称 ServletOutputStream servletOutputStream=response.getOutputStream(); DataOutputStream temps = new DataOutputStream(servletOutputStream); DataInputStream in = new DataInputStream(new FileInputStream(filePath));//浏览器下载文件的路径 byte[] b = new byte[2048]; File reportZip=new File(filePath);//之后用来删除临时压缩文件 try { while ((in.read(b)) != -1) { temps.write(b); } temps.flush(); } catch (Exception e) { e.printStackTrace(); optLogsvc.saveLog(au.getUsername(), au.getAttribute("F_BRNO"), au.getAttribute("F_LSTIP"), TOptlogService.TYPE_MR, "", au.getUsername() + "批量下载图片"+fileZip+"失败！"); }finally{ if(temps!=null) temps.close(); if(in!=null) in.close(); if(reportZip!=null) reportZip.delete();//删除服务器本地产生的临时压缩文件 servletOutputStream.close(); } /** *if (picInfolList.size() > 0) { rc.put("success", true); rc.put("picInfo", picInfolList); optLogsvc.saveLog(au.getUsername(), au.getAttribute("F_BRNO"), au.getAttribute("F_LSTIP"), TOptlogService.TYPE_MR, "", au.getUsername() + "查询批量下载"+params.get("f_svr_code")+"成功！"); } else { rc.put("success", false); rc.put("errmsg", "test info"); optLogsvc.saveLog(au.getUsername(), au.getAttribute("F_BRNO"), au.getAttribute("F_LSTIP"), TOptlogService.TYPE_MR, "", au.getUsername() + "查询批量下载"+params.get("f_svr_code")+"失败！"); }*/ optLogsvc.saveLog(au.getUsername(), au.getAttribute("F_BRNO"), au.getAttribute("F_LSTIP"), TOptlogService.TYPE_MR, "", au.getUsername() + "批量下载图片"+fileZip+"成功！"); return ; }

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