/**

     * 从阿里云下载文件 （以附件形式下载） 多个文件进行zip下载  第二种

     * @param request

     * @param response

     */

    @ResponseBody

    @RequestMapping(value = "/zipFilesDown", method = RequestMethod.GET)

    public void zipFilesDown(HttpServletRequest request, HttpServletResponse response){

        String userId = request.getParameter("userId");

        //阿里云基础配置

        String endpoint = OSSConstants.OSS_ENDPOINT;

        String accessKeyId = OSSConstants.OSS_ACCESS_KEY_ID;

        String accessKeySecret = OSSConstants.OSS_ACCESS_KEY_SERCRET;

        String bucketName = OSSConstants.OSS_BUCKET_NAME_ONE;

        String fileHost = OSSConstants.OSS_FILE_HOST;

        try {

            // 初始化

            OSSClient ossClient = new OSSClient(endpoint, accessKeyId, accessKeySecret);;

            String fileName = userId + ".zip";

            // 创建临时文件

            File zipFile = File.createTempFile(userId, ".zip");

            FileOutputStream f = new FileOutputStream(zipFile);

            CheckedOutputStream csum = new CheckedOutputStream(f, new Adler32());

            // 用于将数据压缩成Zip文件格式

            ZipOutputStream zos = new ZipOutputStream(csum);

            // 构造ListObjectsRequest请求。

            ListObjectsRequest listObjectsRequest = new ListObjectsRequest(bucketName);

            // 列出userId目录下的所有文件和文件夹。

            listObjectsRequest.setPrefix(fileHost + "/" + userId + "/");

            ObjectListing listing = ossClient.listObjects(listObjectsRequest);

            // 遍历所有文件。

            System.out.println("Objects:");

            for (OSSObjectSummary ossObjectSummary : listing.getObjectSummaries()) {

                System.out.println(ossObjectSummary.getKey());

                String eachFileName = ossObjectSummary.getKey().substring(ossObjectSummary.getKey().lastIndexOf("-")+1);

                // 获取Object，返回结果为OSSObject对象

                OSSObject ossObject = ossClient.getObject(bucketName, ossObjectSummary.getKey());

                // 读去Object内容  返回

                InputStream inputStream = ossObject.getObjectContent();

                // 对于每一个要被存放到压缩包的文件，都必须调用ZipOutputStream对象的putNextEntry()方法，确保压缩包里面文件不同名

                zos.putNextEntry(new ZipEntry(eachFileName));

                int bytesRead;

                // 向压缩文件中输出数据

                while((bytesRead=inputStream.read())!=-1){

                    zos.write(bytesRead);

                }

                inputStream.close();

                zos.closeEntry(); // 当前文件写完，定位为写入下一条项目

            }

            zos.close();

            String header = request.getHeader("User-Agent").toUpperCase();

            if (header.contains("MSIE") || header.contains("TRIDENT") || header.contains("EDGE")) {

                fileName = URLEncoder.encode(fileName, "utf-8");

                fileName = fileName.replace("+", "%20");    //IE下载文件名空格变+号问题

            } else {

                fileName = new String(fileName.getBytes(), "ISO8859-1");

            }

            response.reset();

            response.setContentType("text/plain");

            response.setContentType("application/octet-stream; charset=utf-8");

            response.setHeader("Location", fileName);

            response.setHeader("Cache-Control", "max-age=0");

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

            FileInputStream fis = new FileInputStream(zipFile);

            BufferedInputStream buff = new BufferedInputStream(fis);

            BufferedOutputStream out=new BufferedOutputStream(response.getOutputStream());

            byte[] car=new byte[1024];

            int l=0;

            while (l < zipFile.length()) {

                int j = buff.read(car, 0, 1024);

                l += j;

                out.write(car, 0, j);

            }

            // 关闭流

            fis.close();

            buff.close();

            out.close();

            ossClient.shutdown();

            // 删除临时文件

            zipFile.delete();

        } catch (Exception e) {

            e.printStackTrace();

        }

    }