java--IO
1.
https://www.cnblogs.com/taoXiang/p/12517072.html
https://mp.weixin.qq.com/s?__biz=Mzg3MjA4MTExMw==&mid=2247484746&idx=1&sn=c0a7f9129d780786cabfcac0a8aa6bb7
https://zhuanlan.zhihu.com/p/23488863
BIO:同步阻塞IO
NIO:同步非阻塞IO
AIO:异步非阻塞IO(基于事件和回调机制)
java的BIO、BIO、AIO时对操作系统IO模型的封装