毕业论文网络及时通信系统

网络及时通信系统i毕业设计论文任务书一、题目及专题：１、题目网络及时通信系统２、专题二、课题来源及选题依据Internet的迅速发展，使得一切变得简单而快捷。但是带给人们方便的同时，它也不可避免的带来了诸多不利因素。许多企业为避免不必要的麻烦，提高工作效率，诸如QQ等聊天工具禁止开启。那么，公司内部的员工交流切磋就不是太方便，如何把聊天工具应用于公司内部网络中，探讨服务端程序，这是本论文的选题原则。三、本设计（论文或其他）应达到的要求：本聊天工具应包括以下主要功能：用户注册资料修改用户登录查找好友添加好友添加好友应答直接添加好友好友列表查看聊天资料发送消息接收消息查看好友资料更新好友列表陌生人消息删除好友上线通知大学学士学位论文ii摘要本次设计所开发的网络聊天工具可作为公司、企业的内部交流工具使用，既充分利用了网络资源，又保证内部信息的安全。本聊天工具由服务器端程序和客户端程序两部分组成，整体采用Java平台开发，并使用SQLSERVER2000管理数据库数据。服务器是后台支持程序，运行界面仅是一个DOS窗口；客户端程序面向实际用户，它有必要的界面和按钮，向用户提供网络及时通信的功能。本聊天工具的开发采用TCP/IP协议连入互连网，通过UDP协议交换互连网络环境中计算机的通信。但是服务器端和客户端的通信并不是一对一的映射，而是一对多的效应。这就需要客户/服务器模式，这里采用的是最常见的Socket网络编程，它能实现服务器端的多线程。关键字：SQLSERVER2000,TCP/IP协议，UDP协议，socket网络编程网络及时通信系统iiiAbstractThisdesigndevelopsthenetworkchatsthetooltobepossibletotakethecompany,enterprise'sinternalexchangetooluse,bothfullyhasusedthenetworkresources,andguaranteeinteriorinformationsecurity.Thischatsthetooliscomposedbytheserverendprocedureandtheclientsideproceduretwoparts,thewholeusestheJavaplatformdevelopment,andusesSQLSERVER2,000tomanagethedatabasedata.Theserveristhebackstagesupportprocedure,themovementcontactsurfaceisonlyaDOSwindow;theclientsideprocedurefacetheactualuser,ithasthenecessitythecontactsurfaceandthebutton,providesthenetworkpromptcorrespondencetotheuserthefunction.ThischatsthetooldevelopmenttouseTCP/IPagreementcompanyentersinterlocksthenet,throughUDPagreementexchangeinterconnectingnetworkenvironmentincomputercorrespondence.Buttheserverendandtheclientsidecorrespondenceisnotapairofmapping,butispairofmanyeffects.Thisneedsthecustomer/theserverpattern,hereusesisthemostcommonSocketnetworkprogramming,itcanrealizetheserverendmultithreading.Keywords:SQLSERVER2000,TCP/IPagreement,UDPagreement,socketnetworkprogramming网络及时通信系统i目录第一章开发工具概述及技术准备...........................................................................11.1引言.........................................................................................................11.2SQLSERVER2000概述.......................................................................11.2.1SQLSERVER2000简介............................................................11.2.2SQLSERVER2000与其它数据库的比较................................21.3TCP/IP协议............................................................................................21.4UDP协议................................................................................................41.4.1UDP协议.....................................................................................41.4.2UDP与TCP协议的比较............................................................41.5Socket网络编程.....................................................................................5第二章系统总体设计...............................................................................................62.1模式设计分析........................................................................................62.2功能模块划分........................................................................................72.3多线程设计............................................................................................82.4数据库设计............................................................................................8第三章系统详细设计...............................................................................................113.1服务器的设计.......................................................................................113.1.1主服务器类的设计.....................................................................113.1.2ServerThread类的设计..............................................................113.1.3登录验证...................................................................................123.1.4新建用户...................................................................................123.1.5好友处理...................................................................................123.1.6退出下线...................................................................................133.2客户端的设计......................................................................................133.2.1用户注册...................................................................................143.2.2用户登录...................................................................................173.2.3主程序设计...............................................................................203.2.4消息通信的设计.......................................................................283.2.5好友管理...................................................................................31第四章系统的运行结果.........................................................................................33总结.........................................................................................................................37致谢.........................................................................................................................38参考文献.....................................................................................................................38附录.............................................................