毕业论文 彭武 正式版整理.doc

毕业设计（论文） 题 目： 姓 名： 学 号： 005020114 指导教师(职称)： 郑更生（副教授） 专 业： 网络工程 班 级： 0所 在 学 院： 计算机科学与工程学院 201年 5 月目 录 摘 要 关键词：Abstract With the rapid development of information technology, A variety of Web-based application was born.For example, Internet-based information publishing, communications, data sharing, etc.LAN development is also rapidly,many government agencies, businesses, schools, are the first linked to a unified LAN,then access to INTERNET..So the instant messenger in LAN was borned. The following are several key elements of this graduation. 1.I make a new design, and implement it on WINDOWS platform. In my implementation the client and the server were integrated in one program with multi thread mechanism. And had a good GUI,it was very easy to use it. And the function is very realizable. At last, it is also easy for expanding. 2.Voice and video chat as a new type of communication and communication tools, breaking the geographical constraints, can provide more convenient, flexible and comprehensive audio and video transfer of information and services, has a very wide range of prospects for the development. 3.This article describes using the Microsoft Visual C + + 6.0 and MFC programming, video chat system a common solution. Text chat using TCP mode, file transfer using P2P mode, voice and video is based on the Microsoft-developed real-time communication (RTC) application programming interface (API) SDK development package implements a peer-to-peer text chat, voice and video chat, and provide voice and video setup wizard. Keywords：Chat room;Multi-threaded;Voice and video;File Transfer第一章 绪论 1.1课题背景 用户需求,即时通讯的产品也不断。即时通讯的发展在基础应用方面QQ在内，许多即时性聊天工具都推出了语音聊天、视频聊天功能模块。本课题研究的是基于局域网的聊天室，用VC++编写的程序，程序实现一般的文字聊天功能，可作为某局域网的交流工具。 本系统采用基于Socket的方法实现局域网通信，基于Socket的局域网通信软件可以为企业原有的局域网提供一种良好，安全，快速的通信机制。它的实现无需对企业原有的局域网硬件进行任何改动，具有实现成本低廉的优点，它的使用能有效地降低