[ Java ] 线程池问题疑惑，大佬们赐教

背景:在 controller 里并发调用三个其他服务接口，然后组装数据返回

@RequestMapping({"/flow/test"})
@ResponseBody
public String hello(HttpServletRequest request, @RequestParam(name = "tabId", required = false) Integer tabId) {


    ExecutorService servicepool = Executors.newFixedThreadPool(10);

    ExecutorCompletionService<String> service = new ExecutorCompletionService<String>(servicepool);

    service.submit(() -> {
        String uri = "http://localhost/api/user/info";
        return HttpHelper.getRequest(uri, 300);

    });

    service.submit(() -> {

        String uri = "http://localhost/api/news/list";
        return HttpHelper.getRequest(uri, 300);

    });
    service.submit(() -> {

        String uri = "http://localhost/api/flow/list";
        return HttpHelper.getRequest(uri, 300);

    });
    List<String> curlResult = new ArrayList<>();
    try {
        servicepool.shutdown();
        for (int i = 0; i < 3; i++) {
            curlResult.add(service.take().get());
        }

    } catch (Exception ex) {

    }
    //TODO 组装数据

    return JSON.toJSON(curlResult).toString();
}

问题：这样写可不可以？有什么弊端或者是有什么需要注意的地方，请大佬们指点一二