服务器与客户间通过套接口Socket(TCP)连接。在java中使用套接口相当简单，Java API为处理套接口的通信提供了一个类java.net.Socket.,使得编写网络应用程序相对容易．服务器采用多线程以满足多用户的请求，通过JDBC与后台数据库连接，并通过创建一个ServerSocket对象来监听来自客户的连接请求，默认端口为8080，然后无限循环调用accept()方法接受客户程序的连接-Between server and client through the socket Soc

A Java class library for networking applications using Java sockets & threads. From simple listener classes to skeletons for building server & client applications, This library aims to take care of all socket programming & multithreading you need.

Locachat with threads for many user using sockets.