本文選題：Web應(yīng)用　切入點(diǎn)：分層架構(gòu)　出處：《北京郵電大學(xué)》2014年碩士論文

【摘要】：隨著移動(dòng)互聯(lián)網(wǎng)的快速發(fā)展,各種新媒體隨之興起,LED顯示屏以其獨(dú)特的不間斷顯示的特點(diǎn)獲得了用戶的青睞,被廣泛應(yīng)用于各種信息展示的場合。本論文設(shè)計(jì)的基于Web的無線Led信息發(fā)布系統(tǒng)可以對LED屏幕進(jìn)行實(shí)時(shí)無線操作與監(jiān)控,實(shí)現(xiàn)信息的遠(yuǎn)程無線發(fā)布。 本系統(tǒng)采用B/S(瀏覽器/服務(wù)器)模式,運(yùn)用ExtJS框架進(jìn)行用戶界面的搭建,用戶可以跨平臺地通過瀏覽器進(jìn)行訪問；服務(wù)器端使用了J2EE核心技術(shù)進(jìn)行開發(fā),采用分層架構(gòu),將表現(xiàn)層、業(yè)務(wù)邏輯層和持久層進(jìn)行分離,實(shí)現(xiàn)了系統(tǒng)模塊的松耦合,使得系統(tǒng)有良好的擴(kuò)展性與重用性。系統(tǒng)主要包括三大功能模塊：終端管理模塊、節(jié)目管理模塊和信息發(fā)布模塊,三者結(jié)合使用來實(shí)現(xiàn)信息的遠(yuǎn)程無線發(fā)布。 系統(tǒng)數(shù)據(jù)庫采用了分布式架構(gòu),將主數(shù)據(jù)庫中的數(shù)據(jù)進(jìn)行水平切分,然后通過一致性哈希算法分拆到各個(gè)不同的數(shù)據(jù)庫中。應(yīng)用程序通過特定的路由訪問規(guī)則去目標(biāo)數(shù)據(jù)庫中獲取所需數(shù)據(jù)。通過使用數(shù)據(jù)庫分布式架構(gòu),減輕了單張數(shù)據(jù)表的訪問壓力,提高了系統(tǒng)性能,同時(shí)也改善了用戶體驗(yàn)。系統(tǒng)上線后運(yùn)行穩(wěn)定,各方面都達(dá)到了預(yù)期的要求。
[Abstract]:With the rapid development of the mobile Internet, a variety of new media have emerged, LED display screen for its unique features of uninterrupted display has won the favor of users. This paper designs a wireless Led information publishing system based on Web, which can carry out real-time wireless operation and monitoring of LED screen, and realize remote wireless distribution of information. This system adopts the B / S (browser / Server) mode, uses the ExtJS framework to build the user interface, the user can access through the browser across the platform, the server end uses the J2EE core technology to carry on the development, adopts the stratified structure, The presentation layer, business logic layer and persistence layer are separated to realize the loose coupling of the system modules, which makes the system have good scalability and reusability. The system mainly includes three functional modules: terminal management module, terminal management module, and so on. The program management module and the information publishing module are combined to realize the remote wireless distribution of information. The system database adopts distributed architecture, which divides the data in the main database horizontally. The application uses specific routing access rules to obtain the required data in the target database. By using the database distributed architecture, It reduces the access pressure of the single data table, improves the system performance, and improves the user experience. The system runs stably after the system goes on line, and all aspects meet the expected requirements.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TP311.52;TP393.092

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