参考： https://www.cnblogs.com/wrencai/p/5907042.html
https://blog.csdn.net/qq_29954971/article/details/79153324
https://www.cnblogs.com/xiaominghupan/p/4246232.html
网络通信框架：Netty和Mina
原文：https://www.cnblogs.com/smileblogs/p/10371447.html
