【正文】 ty. Online questionanswering system takes advantage of the work to implement the answering work, which breaks the limitations of time and space, conveniently and timely improves answering work, and increases the frequency of interactions among teachers and students. It is of great significance to the reform of teaching methods and teaching models in colleges and universities. Online questionanswering system is developed by Java Web technology, adopted the prevalent B/S structure, used as the background database and employed as the server. The system integrated two open source frameworks of Struts2 and Spring, and used the Struts2 Action as a managed Bean in Spring. Through dependency injection, Action can easily get references of the managed Bean that implements business function . The system realized the functions as follows. Students can login, register and modify their information, search and apply for courses, ask questions and participate in discussions, check their courses and questions, check applying processes。online questionanswering system 湖南科技大學本科生畢業(yè)設計（論文） i 目 錄 第一章 前言 .................................................................................................................... 1 課題研究背景及意義 .............................................................................................. 1 研究背景 ........................................................................................................... 1 研究意義 ........................................................................................................... 1 國內外現(xiàn)狀 .............................................................................................................. 1 第二章 系統(tǒng)分析 .......................................................................................................... 3 可行性分析 .............................................................................................................. 3 技術可行性分析 ............................................................................................... 3 經濟可行性分析 ............................................................................................... 3 操作可行性分析 ............................................................................................... 3 需求分析 .................................................................................................................. 4 功能性需求分析 ............................................................................................... 4 非功能性需求分析 ........................................................................................... 5 系統(tǒng)流程圖 ....................................................................................................... 5 系統(tǒng)數(shù)據流圖 ................................................................................................... 7 第三章 系統(tǒng)總體設計 ................................................................................................. 9 項目規(guī)劃 .................................................................................................................. 9 系統(tǒng)總體結構 .......................................................................................................... 9 系統(tǒng)功能模塊 ......................................................................................................... 10 學生模塊功能定義 .......................................................................................... 10 教師模塊功能定義 .......................................................................................... 10 管理員功能模塊定義 ...................................................................................... 11 第四章 數(shù)據庫設計 ..................................................................................................... 13 數(shù)據庫分析 ............................................................................................................. 13 項目 ER 圖 ............................................................................................................. 13 數(shù)據庫表的設計 ..................................................................................................... 16 湖南科技大學本科生畢業(yè)設計（論文） ii 第五章 系統(tǒng)詳細設計與實現(xiàn) .................................................................................. 19 界面設計 ................................................................................................................. 19 系統(tǒng)分層的實現(xiàn) ..................................................................................................... 19 表示層的設計 .................................................................................................. 20 控制層的設計 .................................................................................................. 20 數(shù)據庫連接與操作的實現(xiàn) ..................................................................................... 20 數(shù)據源的配置 .................................................................................................. 20 數(shù)據庫操作的實現(xiàn) .......................................................................................... 21 各個功能模塊的設計與實現(xiàn) ................................................................................. 21 用戶登錄和注冊 .............................................................................................. 21 學生用戶模塊 .................................................................................................. 23 教師用戶模塊 .................................................................................................. 29 管理員模塊 ...................................................................................................... 32 第六章 系統(tǒng)測試 ......................................................................................................... 37 測試目的 .................................