基于AJAX的WEB即时聊天系统

^论文字数:9205,页数:33

摘要
 当即时通讯在网络高速发展的今天已经成为人们通过网络进行交流的主要方式之一，与Email相比，它具有双向互动性和即时性。现在已经有多种比较流行的即时通讯软件，诸如QQ，MSN等，但都是基于C/S模式的，需要下载客户端进行安装，用户名、密码、聊天记录等也是存放在本地机器上，在安全性和方便性上都有所欠缺。B/S(浏览器/服务器模式)是随着Internet技术的兴起，对C/S结构的一种改进。
 本文主要介绍了JAVA、AJAX、JSP、java script、XML等技术相关的基础知识，通过对java script的脚本语言、JSP的内置对象、JSP与数据库的连接等技术的分析，探讨了建立基于AJAX即时聊天通讯的设计思想、方法及设计过程，详细地分析了各个模块的功能及实现方法。利用AJAX技术开发即时聊天系统，解决了如聊天信息即时刷新、框架网页与变量的传递、聊天界面、屏蔽、文件的传输等问题，并结合代码进行了论述，本文所实现的基于AJAX即时聊天系统具有良好的人机交互界面 ，良好的用户体验，可实现企业内部的交流通讯、文件传输。
关键词：即时聊天；WEB；AJAX ；JAVA；java script；XML；

Abstract
 Immediately when the communication already became the people in the network high speed development to carry on one of today exchange fundamental modes through the network, compared with Email, it had bidirectional interactive and instantaneity。Now already had many kinds of quite popular immediate communication software, such as QQ, MSN and so on, but all was based on C/The S pattern, needs to download the client side to carry on the installment, the user name, the password, chats the record and so on also is deposits on the local machine, all has in the security and the conveniences is short of。B/S is along with Internet technology starting, to C/S structure one kind of improvement.
 The main introduction of the original JAVA、AJAX、JSP、java script、XML technique the person who is mutually related rudimentary knowledge , by means of the analysis to scripting language , integral target , JSP together with the data bank joint of JSP of JSP and so on technique , probing into to establish to Immediately chat design idea , means and design process , the meritorious service detailed to analyze every module be able to reach the realization means The problem such as utilizing AJAX technological development to chat in the room , and resolving refurbishing and frame web page together with The problem such as utilizing AJAX technological development to chat in the room , and resolving refurbishing and frame web page together with variable transmission and chatting interface and shielding and so on as chatting , and uniting the source program to expound , the chatting room that the original was achieved has the well user interaction interface , and to improve user’s impression , file transmission.
 Key words：Immediately Chat；Web；Ajax ；Java；java script；Xml；
 
 

目录
1. 前言 3
2. 选课背景 4
2.1. 课题起源 5
2.2. 课题目的 5
2.3. 课题意义 5
2.4. 技术要求 5
3. 可行性分析 6
3.1. JAVA技术分析 7
3.2. AJAX技术分析 8
3.3. 模型结构 8
3.4. 开发环境和工具 9
4. 需求分析 9
4.1. 系统的需求 10
4.2. 数据库分析与设计 10
4.2.1. 数据库需求分析 10
4.2.2. 数据表结构设计 11
5. 系统设计 13
5.1. 基本开发流程 13
5.1.1. 站点管理 14
5.1.2. 需求分析 14
5.1.3. 设计制作 14
5.1.4. 动态编程 14
5.1.5. 测试发布 14
5.2. 运行架构 14
5.3. 功能模块图 15
5.3.1. 系统模块图 15
5.4. 详细系统设计 15
5.4.1. 系统注册模块 15
5.4.2. 系统登陆模块 17
5.4.3. 用户主界面 18
5.4.4. 消息发送模块 23
5.4.5. 查找好友模块 26
5.5. 测试发布 27
5.6. 已解决问题 27
5.6.1. Mysql中文乱码问题 27
5.6.2. Tomcat 中文乱码 28
5.6.3. servlet 缓存问题 28
6. 总结 30
7. 致谢 31
8. 参考文献 32

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