socket

1.Socket详解

https://blog.csdn.net/sight_/article/details/8138802

2.java 网络编程(Socket) TCP/UDP 总结案例：

https://blog.csdn.net/qq_14996421/article/details/51472718

3.JAVA基于TCP和UDP的网络连接

https://blog.csdn.net/zhengyikuangge/article/details/51002849