@SneakyThrows
    @Test
    public void test(){
        for (int i = 0; i < 5; i++) {
            send();
        }
    }
    @SneakyThrows
    @Async
    public void send(){
        System.out.println(new Date());
        Thread.sleep(3000);
    }
日志就打印了两次，每次运行次数都有可能变化