Java使用多线程调用远程接口

   @Test
   public void testMultiThread() throws InterruptedException {
      int i = 5;
      System.out.println("=====多线程开始=====");
      // 创建闭锁对象抓住所有线程，构造器指定倒数次数
      CountDownLatch countDownLatch = new CountDownLatch(i);
      while (i > 0) {
         int finalI = i;
         // 启用多线程
         CompletableFuture.runAsync(() -> {
            System.out.println(finalI);
            // 线程执行结束则countDown，倒数一次
            countDownLatch.countDown();
         });
         i--;
      }
      // 等待所有线程都countDown，倒数完毕，结束线程
      countDownLatch.await();
      System.out.println("=====多线程结束=====");
   }