文件打包下载

public WebResponse downloadFileBatch(HttpServletResponse response, HttpServletRequest request, List fileIdList, String loginUserId, String loginUserName) throws IOException {
            ZipOutputStream zipOut = new ZipOutputStream(response.getOutputStream());
            response.setContentType("application/octet-stream;charset=UTF-8");
            response.setHeader("Content-Disposition", "attachment;filename="+java.net.URLEncoder.encode("打包","UTF-8")+".zip");
            int count = 1;
            for (String fileId : fileIdList) {
                String fileName = fileCenterService.getFilename(fileId, loginUserId);
                ResponseEntity respon = fileCenterService.download(fileId, loginUserId, loginUserName);
                byte[] result = respon.getBody();
                addToZip(new ByteArrayInputStream(result), zipOut, fileName,count);
                count++;
                zipOut.flush();
                response.flushBuffer();
            }
            zipOut.close();
}
private void addToZip(ByteArrayInputStream is, ZipOutputStream zipOut, String fileName,int count) {
        try{
            ZipEntry entry = new ZipEntry(count+"."+fileName);
            zipOut.putNextEntry(entry);
            int len;
            byte[] buffer = new byte[1024];
            while ((len = is.read(buffer)) > 0) {
                zipOut.write(buffer, 0, len);
            }
            is.close();
            zipOut.closeEntry();
        }catch (Exception e){
            e.printStackTrace();
        }
    }