Springboot文件批量下载

利用压缩包的形式进行批量下载

 /**
     * 将磁盘的多个文件打包成压缩包并输出流下载
     *
     * @param pathList
     * @param response
     */
    public void zipDirFileToFile(List<Map<String, String>> pathList, HttpServletResponse response, String taskName) {
        try {
            // 设置response参数并且获取ServletOutputStream
            ZipArchiveOutputStream zous = getServletOutputStream(response, taskName);
            for (Map<String, String> map : pathList) {
                String fileName = map.get("outputName");
                File file = new File(map.get("localFileName"));
                InputStream inputStream = new FileInputStream(file);
                setByteArrayOutputStream(fileName, inputStream, zous);
            }
            zous.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    public ZipArchiveOutputStream getServletOutputStream(HttpServletResponse response, String taskName) throws Exception {
        //输出压缩文件名年月日时分秒
        String outputFileName = taskName + ".zip";
        Log.info("压缩文件名：" + outputFileName);
        response.reset();
        response.setHeader("Content-Type", "application/octet-stream");
        response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(outputFileName, "UTF-8"));
        response.setHeader("Pragma", "no-cache");
        response.setHeader("Cache-Control", "no-cache");
        ServletOutputStream out = response.getOutputStream();
        ZipArchiveOutputStream zous = new ZipArchiveOutputStream(out);
        zous.setUseZip64(Zip64Mode.AsNeeded);
        return zous;
    }
    public void setByteArrayOutputStream(String fileName, InputStream inputStream, ZipArchiveOutputStream zous) throws Exception {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        byte[] buffer = new byte[5120];
        int len;
        while ((len = inputStream.read(buffer)) != -1) {
            baos.write(buffer, 0, len);
        }
        baos.flush();
        byte[] bytes = baos.toByteArray();
        //设置文件名
        ArchiveEntry entry = new ZipArchiveEntry(fileName);
        zous.putArchiveEntry(entry);
        zous.write(bytes);
        zous.closeArchiveEntry();
        baos.close();
        inputStream.close();
    }