@Async 获取返回值 超时设置

 @Test
    public  void   imeOu() throws InterruptedException, TimeoutException, ExecutionException {



        CompletableFuture<String> page1 =  task.task();
        CompletableFuture<String> page2 =  task.task();
        CompletableFuture<String> page3 =  task.task();

        List<CompletableFuture<String>> list=new ArrayList<>();
        list.add(page1);list.add(page2);list.add(page3);
        List<String> result=new ArrayList<>();
        
        for(int i=0;i<list.size();i++){
            // 异步线程执行超过5秒，就报出超时异常
            result.add(page1.get(5, TimeUnit.SECONDS));
        }
        System.out.println(
             result
        );

        System.out.println("-main-end-");

    }

  @Async
     public CompletableFuture<String>  task()   {
          int  s=(int)(Math.random()*10000);
          System.out.println("s="+s);
          try {
              Thread.sleep(s); // 随机睡眠几百毫秒
          } catch (InterruptedException e) {
              e.printStackTrace();
          }

          System.out.println("task-end");
          return CompletableFuture.completedFuture("<data>");
      }