oss打包下载

    private static final String OSS_ENDPOINT = PropertiesUtil.getString("oss.endpoint");

    private static final String OSS_ACCESS_KEY = PropertiesUtil.getString("oss.access.key");

    private static final String OSS_SECRET = PropertiesUtil.getString("oss.secret");

    private static final String OSS_BUCKET_NAME = PropertiesUtil.getString("oss.bucket.name");

    // private static final String OSS_CT_BUCKET_NAME =
    // PropertiesUtil.getString("oss.bucket.ct.name");

    private static final OSSClient OSS_CLIENT = new OSSClient(OSS_ENDPOINT, OSS_ACCESS_KEY, OSS_SECRET);

/**
     * 批量下载oss 文件 并打成zip 包 返回到response中
     *
     * @param fileNames
     *            oss上的文件名集合 如：product/image/3448275920.png  * @param zipFileName
     *            压缩包文件名
     * @param response
     *            HttpServletResponse
     */
    public static void batchDownLoadOssFile(List<String> fileNames, String zipFileName, HttpServletResponse response) {
        response.setCharacterEncoding("utf-8");
        response.setContentType("multipart/form-data");
        //要下载成什么类型的文件，这里直接加后缀
        response.setHeader("Content-Disposition", "attachment;fileName=" + zipFileName + ".zip");
        BufferedInputStream bis = null;
        try {
            ZipOutputStream zos = new ZipOutputStream(response.getOutputStream());
            for (String fileName : fileNames) {
                Date expiration = new Date(System.currentTimeMillis() + 3600 * 1000);
                GeneratePresignedUrlRequest request = new GeneratePresignedUrlRequest(OSS_BUCKET_NAME, fileName,
                        HttpMethod.GET);
                // 设置过期时间。
                request.setExpiration(expiration);
//                request.setContentType("application/pdf");
                // 生成签名URL（HTTP GET请求）。
                URL signedUrl = OSS_CLIENT.generatePresignedUrl(request);
                // 使用签名URL发送请求。
                OSSObject ossObject = OSS_CLIENT.getObject(signedUrl, new HashMap<>());
                if (ossObject != null) {
                    InputStream inputStream = ossObject.getObjectContent();
                    byte[] buffs = new byte[1024 * 10];

                    String zipFile = fileName.substring(fileName.lastIndexOf("/") + 1)+".pdf";
                    ZipEntry zipEntry = new ZipEntry(zipFile);
                    zos.putNextEntry(zipEntry);
                    bis = new BufferedInputStream(inputStream, 1024 * 10);

                    int read;
                    while ((read = bis.read(buffs, 0, 1024 * 10)) != -1) {
                        zos.write(buffs, 0, read);
                    }
                    ossObject.close();
                }
            }
            zos.close();
            //关闭流
            IOUtil.close(bis);
        } catch (Exception e) {
            LOGGER.error("打包下载发生异常：",e);
        } finally {
            // 关闭流
            try {
                response.getOutputStream().flush();
                response.getOutputStream().close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

springboot框架，前端加一个接口

@GetMapping(value = "/downloadBookZip")
    public void downloadBookZip(HttpServletRequest request,HttpServletResponse response) {
        String subjectIdstr = request.getParameter("subjectId");
        String className = request.getParameter("className");
        String studentNum = request.getParameter("studentNum");
        if(Strings.isNullOrEmpty(subjectIdstr)) {
            throw new BusinessException(BusinessExceptionEnum.PARAM_ERROR, "必须有科目ID");
        }
        Long subjectId = Long.parseLong(subjectIdstr);
        //查询生成文件路径
        List<String> list = wrongTopicDao.queryWrongTopicOssKey(subjectId,className,studentNum);        //上面按照个人业务查询自己的文件key即可
        OssUtil.batchDownLoadOssFile(list, "books", response);
    }

 

来源：https://www.cnblogs.com/Ebird/p/11733406.html