本文介绍一种用Java的Socket和ServerSocket实现服务器和客户机通讯的的方法。原理是在服务器端建立ServerSocket端口并监听，接收到客户端的连接请求时建立Socket，得到Socket的输入输出流。在客户端新建Socket并获得输入输出流。服务器和客户端的输入输出流建立后使用writeLine()和println()方法彼此发送和接收数据。为提高代码效率，建立两个类clientAgent和serverAgent。

-This article introduces a Java ServerSocket socket server and and client communication methods. The principle is established on the server side ServerSocket ports and eavesdropping, reception to the client connection request to establish socket, the socket to be input and output streams. The new Socket client and access input and output streams. Server and client input and output streams used after the establishment of writeLine (), and println () side France each other to send and receive data. To improve code efficiency, the establishment of two categories clientAgent and serverAgent.