这里充分尊重原作者的版本,学习了知识要感激原博主
Runnable、Callable、Executor、Future、FutureTask关系解读
http://blog.csdn.net/zhangzhaokun/article/details/6615454
alibaba:
ThreadPoolExecutor
asyncload
RocketMQ http://blog.csdn.net/a19881029/article/details/34446629