有时我们希望在后台实时生成文件并下载到客户端

    @GetMapping(value = "download")
    public void download(HttpServletResponse response) {
       try(OutputStream outputStream = response.getOutputStream();
          ZipOutputStream zipOutputStream = new ZipOutputStream(outputStream, StandardChar...

示例代码，10后抛出超时错误，并且取消子线程任务的执行

    ExecutorService executorService = Executors.newSingleThreadExecutor();
    Future<String> future = executorService.submit(() -> {
                ....
            }
    );

    try {
        return future.get(10, TimeUnit.SECONDS);
    } catch (Exception e) {
        future...

须指定number类型的大小。