监听线程是否执行完毕

        ThreadPoolExecutor executor= new ThreadPoolExecutor(1, 1, 1000, TimeUnit.MILLISECONDS, new ArrayBlockingQueue<Runnable>(1),Executors.defaultThreadFactory());

        executor.shutdown();
         if (executor.isTerminated()) {
            //巴拉巴拉巴拉巴拉
        }