Linux环境下QT简易通信程序的设计与实现
本系统在设计中运用了基于Linux的Ubuntu操作系统，数据库SQLite，QT，C/S架构等多种的程序来进行设计。主要功能涉及简易的服务器端对客户端的网络通信，聊天内容加密/解密以及数据库保存聊天记录。同时，系统还对可能出现的一些异常情况进行了处理，以确保该系统能够在使用过程中有良好的稳定性。实现了良好的用户界面和业务逻辑，有效地提高聊天过程中的安全性，具有实用性较高，成本低，数据安全性好等特点。
毕业论文关键词： Linux；QT；C/S架构；简易通信；SQLite
Design and implementation of a simple communication program based on Linux environment
Abstract: With the rapid development of science and technology, computers and the Internet has spread in the world, the chat software brings convenience for people's communication but there still exist some problems at the same time, for example some chat program transmitted messages in plain text in the network, this will affect the use or exists security risks. Nowadays most developers take Linux operating system as a development environment especially in server development and maintenance, its strong stability and superior performance conquer us one more time.
This system uses the Ubuntu operating system (based on Linux), SQLite database, C/S architecture and QT in the design. The main function include Server to Client communication, message’s encryption / decryption and save the chat history to databases. At the same time, the system also has dealt with some potential exceptions, to ensure that the system can have good stability in the process of using. The system has a favorable user interface and business logic improving the safety in the process of chat, with high practicability, low cost, good data security features.
Keywords: Linux; QT; C / S structure; Simple communication; SQLite
目录
摘要 i
Abstract ii
目录 iii
1. 绪论 1
1.1 课题背景 1
1.2 本课题研究目的及意义 2
1.3 国内外研究现状 5
1.4 文献综述 6
2. 分析 7
2.1 实现目标 7
2.2 硬件软件需求 7
2.3 具体业务要求与流程分析 7
2.3.1 服务端模块流程 7
2.3.2 客户端模块流程 7
2.3.3 消息处理方式 8
2.4 流程图 8
2.4.1 服务端流程图 8
2.4.2 客户端流程图 9
2.5 外部接口（数据库） 9
2.6 具备的优势 9
3. 设计 12
3.1 系统调查 12
3.2 概要设计 12
3.3 开发流程和模块划分 15
3.3.1 开发流程 15