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............................................................ 31 參考文獻(xiàn) ............................................................ 33 第 4 頁 共 35 頁 前言 網(wǎng) 吧以其龐大的用戶量和潛在購買力,首先成為一個(gè)很好的媒體廣告平臺,尤其是快消品和網(wǎng)絡(luò)相關(guān)類的產(chǎn)品;同時(shí),網(wǎng)吧作為一個(gè)獨(dú)特的渠道,對中國互聯(lián)網(wǎng)的發(fā)展起到了非常關(guān)鍵的作用,已經(jīng)容不得任何一家互聯(lián)網(wǎng)公司忽視。 第 1 頁 共 35 頁 網(wǎng)吧計(jì)費(fèi)系統(tǒng)的設(shè)計(jì) 摘要 互聯(lián)網(wǎng)技術(shù)的不斷革新與發(fā)展 ,給全球經(jīng)濟(jì)帶來新的革命 ,也正在改變著整個(gè)商業(yè)社會的競爭格局。本系統(tǒng)會做到滿足網(wǎng) 吧管理日常工作的需要,使用方便,界面親切,安全可靠。 (2). 增加網(wǎng)吧的開放時(shí)間,提高設(shè)備的利用率 , 包括對每臺電腦配置管理、會員用戶管理、上機(jī)時(shí)間計(jì)算、金額計(jì)算等。使各項(xiàng)業(yè)務(wù)的辦理迅速、準(zhǔn)確,極大的提高了 網(wǎng)吧 管理的工作效率。 C/S 結(jié)構(gòu)是指客戶( Client)和服務(wù)器( Server) ,它們是指通信過程中所涉及的兩個(gè)應(yīng)用進(jìn)程,它所描述的是服務(wù)和被服務(wù)的關(guān)系。 (2)平臺無關(guān)性 Java 源程序代碼在編譯前以文本格式保存,這些文件可以在任何平臺上創(chuàng)建。同時(shí) SQL Server 2022 又包含了多項(xiàng)新功能,從而使其成為大規(guī)模聯(lián)機(jī)事務(wù)處理( OLTP)、數(shù)據(jù)倉庫和電子商務(wù)等應(yīng)用程序的數(shù)據(jù)庫平臺 系統(tǒng)的需求分析 目前,隨著網(wǎng)絡(luò)時(shí)代的到來,使用網(wǎng)絡(luò)的用戶越來越多,網(wǎng)吧用戶對網(wǎng)吧上網(wǎng)非常忠誠,上網(wǎng)時(shí)間和上網(wǎng)頻次都較高, 1/3 以上的人需要每天至少去網(wǎng)吧一次。同時(shí)也為其它場合的計(jì)費(fèi)管理提供了方法和思路。 信息查詢: ( 1)用戶信息查詢:查詢自己的賬號信息,包括賬號、用戶名、密碼等等。 ( 2)退出:提示是否確實(shí)要退出系統(tǒng),在管理員確定要退出系統(tǒng)后,退出管理員系統(tǒng)。 ( 2)關(guān)于:系統(tǒng)版本信息及聯(lián)系方式。對于查詢,如果沒有查到相關(guān)記錄,給出相應(yīng)提示,如果查詢成功,則顯示查詢結(jié)果,提示及顯示的結(jié)果要求準(zhǔn)確 性。下面是該系統(tǒng)的實(shí)體關(guān)系圖: 圖 3 用戶實(shí)體信息 圖 31 計(jì)算機(jī)實(shí)體信息 第 13 頁 共 35 頁 圖 32 實(shí)體關(guān)系 ( 1) Client 表 ID:主鍵,用戶編號,用戶登錄時(shí)使用,無默認(rèn)值 Name:用戶名稱,默認(rèn)值為 admin Password:用戶密碼,默認(rèn)值為 123456。如圖 9: 圖 9 MonthTurnover 表圖 第四章 系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn) 系統(tǒng)的 C/S 建模 ( 1)包圖 該系統(tǒng)主要分為兩個(gè)包: client 和 manager,它們與 bar 包是組合關(guān)系,如圖 10。 管理員發(fā) 出輸入帳號和密碼消息,系統(tǒng)返回驗(yàn)證消息;管理員對用戶發(fā)出增刪改查消息,系統(tǒng)返回顯示信息消息;管理員對系統(tǒng)發(fā)出推出消息,如圖 142。 try { ()。//修改密碼成 功 (null, 輸入的 舊 密碼錯(cuò) 誤 , 系統(tǒng)提 示,)。 // 相差的 天 數(shù) long hour = (seconds day * 24 * 60 * 60) / (60 * 60)。 Fee = (float) (2, ) .doubleValue()。 } } 管理員基本功能實(shí)現(xiàn) 首先,管理員登陸: 管理員登陸下線等基本功能與用戶相同,不再贅述,現(xiàn)在講解管理員與用戶不同的功能。 ②保存:此處的保存, 其實(shí)只是將一條新記錄添加到數(shù)據(jù)庫相應(yīng)的表中,而實(shí)際上, “保存”菜單項(xiàng)是由添加新記錄和修改記錄兩部分組成的,如果未入庫則執(zhí)行 insert,如 果已入庫,則執(zhí)行 update(見下文的“修改”部分),實(shí)現(xiàn)如下: String ID = (String) (row, 0)。 } else {// 查詢是 否 記錄已經(jīng) 存 在 try { Connection con = ()。 (3, Password)。 // 無論是 第 一種刪除 情 況還是第 二種 , 最后都 要 從表格中 刪 除 , 但是未 入 庫的行不 會 提示“ 是否刪 除 ” int rowcount = () 1。 String Balance = (String) (row, 3)。 ID)。 if (() amp。 try { Connection con = ()。 CaseID CurrentBalance Expected 13 提示 “ 余額不 足 ,請速到前 臺 充值,以免影 響使 用 ” 14 0 自動(dòng)結(jié) 賬 下機(jī),不顯 示 本次上機(jī)信息 表 4 余額不足提醒的功能測試用例 第 30 頁 共 35 頁 性能測試 ( 1) 易用性和界 ( 2) 面測試 本系 統(tǒng)采用表格形式顯示數(shù)據(jù),利用鼠標(biāo)右鍵菜單來實(shí)現(xiàn)功能,操作簡單,但是整體風(fēng)格不夠美觀,互動(dòng)性不夠強(qiáng)。 雖然通過系統(tǒng)的軟件測試方法的檢測,但是該 網(wǎng)吧計(jì)費(fèi) 系統(tǒng)還存在著一些潛在的缺陷: 該系統(tǒng)在設(shè)計(jì)實(shí)現(xiàn)時(shí)對用戶的信息存儲量沒有很好的估計(jì),所以在以后的實(shí)際使用中,可能會出現(xiàn)一些數(shù)據(jù)庫容量的限制問題。 感謝學(xué)院的同學(xué)們,他們在我平時(shí)的學(xué)習(xí)和生活中給了我很大的幫助,尤其是寢室的同學(xué)們,他們在我的論文完成過程中給我提供了許多寶貴的信息、意見和幫助!使得我們的畢業(yè)設(shè)計(jì)更加完備。80s. We sat on the back of pickup trucks for hours. The sky was blue, and we couldn39。s Liaoning province, decades ago. The solider gave the old man a handmade saddle when they bid farewell. The story inspired Nasun to write Carved Saddle, a song that later became one of his most popular numbers. Now, every year, Nasun recruits young singers and dancers for the troupe. The troupe has also designed a new repertoire, which is mostly based on the daily lives of Mongolian people, especially the lives of nomadic families, and has bined contemporary musical elements with folk songs of the region. Haimu, a 25yearold khoomei (a local variant of overtone singing) singer, joined the troupe three years ago. Along with a sixmember band, he performs fast songs and soft ones that he writes- all while playing the horsehead fiddle.Although I learned the piano since childhood and grew up listening to various kinds of music, to me, the folk music of Inner Mongolia is the root, he says. Performing in remote villages is pleasant. I feel at home on the boundless grasslands, and the warm people there make me feel fulfilled. The first round of spring auction season in Beijing ended last week, but it failed to create much spring in the art market. Although two pieces of Chinese painting fetched more than 100 million yuan, the decline in trading volume and sa le rate showed a downturn this year. In the ―Grand View: Chinese Painting Highlight‖ session at China Guardian 2022 spring auctions, Pan Tianshou’s representative work Eagle, Rock and Flora hit a record auction price of 279 million yuan, while Li Keran’s masterwork Jinggang Mountain fetched million yuan, an unexpected high in recent years. However, the trading volume fells to billion yuan from billion yuan in the same period the year before. The Huangchen 2022 Spring Auctions, which recorded million yuan in total sales, experienced the same. The section number went down to 5 from 12 pared to last year. According to expert Shao Jianwu, the art market did not attract much excitement this year due to the booming stock market and the persistent problems of fery and fake deals. The two pieces of Chinese painting notched up high price this spring due to their own value not due to a revival in the market. The successful transaction of two works with a hammer price of more than 100 million yuan once again confirms that valuable and rare works of high quality always earn the longlasting high price. Chinese painting and calligraphy is still the pillar of the market. However, the overall sales rate has dropped slightly, which reflects the demand for the ordinary auction goods has weakened,‖ said the president of China Guardian’s Hu Yanyan. Besides, the entry of new buyers also makes certain changes to the direction of purchasing. In a word, the overall market trend is very unpredictable. Although China Guardian 2022 Spring Auctions has achieved remarkable results, it does not mean that the market has walked out of the predicament. We still have to wait for the big economic boom to invigorate the art market.‖ Even so, the hot pursuit of some special items appeared this spring. A special session of China Guardian Spring Auctions titled ―Fine Gilt—Bronze Buddhist Images‖ achieved a great deal with total sales volume of million yuan a