【正文】 ................................................................................4 Socket 通信技術 ...............................................................................................................4 開發(fā)環(huán)境的搭建 ..................................................................................................................5第 3 章 系統(tǒng)分析 .....................................................................................................6 系統(tǒng)基本功能描述 ..............................................................................................................6 可行性分析 ..........................................................................................................................6 系統(tǒng)需求分析 ......................................................................................................................7 功能分析 .......................................................................................................................7第 4 章 系統(tǒng)設計 .....................................................................................................9 數(shù)據(jù)庫設計 ..........................................................................................................................9 系統(tǒng)模塊設計 .....................................................................................................................10 聊天系統(tǒng)工作原理圖 ................................................................................................10 系統(tǒng)功能模塊圖： ....................................................................................................11 系統(tǒng)用例圖： ..............................................................................................................11 活動圖： ......................................................................................................................12 系統(tǒng)類設計 .........................................................................................................................14 Message 類的設計 .....................................................................................................14 截圖類的設計 ............................................................................................................15 聊天記錄類的設計 ....................................................................................................16 服務器線程類設計 ....................................................................................................17第 5 章 系統(tǒng)實現(xiàn) .................................................................................................18 實現(xiàn)概況 ............................................................................................................................18 注冊模塊 ............................................................................................................................18 流程圖 ..........................................................................................................................18 關鍵代碼 ......................................................................................................................18 登錄模塊 ............................................................................................................................20 流程圖 ..........................................................................................................................20 關鍵代碼 ....................................................................................................................20 聊天模塊 ............................................................................................................................24 流程圖 ..........................................................................................................................24 關鍵代碼 ......................................................................................................................24 文件模塊 ............................................................................................................................28 流程圖 ..........................................................................................................................28 關鍵代碼 ......................................................................................................................28 用戶管理模塊 ....................................................................................................................33 流程圖 ..........................................................................................................................33 關鍵代碼 ......................................................................................................................33 其他功能的實現(xiàn) ..............................................................................................................36 截圖功能的實現(xiàn) ..........................................................................................................36 聊天記錄功能的實現(xiàn) ..................................................................................................37 服務端線程的實現(xiàn) ......................................................................................................38 用戶界面的設計 ..............................................................................................................38結(jié)語 .............................