本科畢業論文-網吧計費系統的設計-預覽頁

　

【正文】 和密碼消息，系統返回驗證消息；管理員對用戶發出增刪改查消息，系統返回顯示信息消息；管理員對系統發出推出消息，如圖 142。 }else {// 如 果賬 戶 存在，則 保 存查詢結 果 ，做進一 步 判斷 (Logined)。 try { ()。 String jpw3 = new String(())。//修改密碼成 功 (null, 輸入的 舊 密碼錯 誤 , 系統提 示,)。查詢累計時間，只需要在選擇菜單項時， 獲取當前系統時間，跟開 始時間進行運算即可得到時間差，實現如下： 第 21 頁 共 35 頁 Date DBeginTime = new SimpleDateFormat(yyyy/MM/dd/HH:mm).parse(BeginTime)。 // 相差的 天 數 long hour = (seconds day * 24 * 60 * 60) / (60 * 60)。//把時間 差 化成分鐘 // 四舍五 入 算法 new BigDecimal(Fee)。 Fee = (float) (2, ) .doubleValue()。//把時間 差 化成分鐘 // 四舍五 入 算法 new BigDecimal(Fee)。 } } 管理員基本功能實現 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，現在講解管理員與用戶不同的功能。// 增加新 的 一行 boolean Available = true。 ②保存：此處的保存， 其實只是將一條新記錄添加到數據庫相應的表中，而實際上， “保存”菜單項是由添加新記錄和修改記錄兩部分組成的，如果未入庫則執行 insert，如 果已入庫，則執行 update（見下文的“修改”部分），實現如下： String ID = (String) (row, 0)。 String Rank = (String) (row, 4)。 } else {// 查詢是 否 記錄已經 存 在 try { Connection con = ()。 if (()) {// 如果記 錄 已存在 (null, 該 賬 戶 已 經存 在 , 系統提 示 , )。 (3, Password)。 PreparedStatement stmt = con .prepareStatement(sql1+where ID = ?)。 // 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。 } } catch (Exception e1) { ()。 String Balance = (String) (row, 3)。 try { Connection con = ()。 ID)。 ()。 if (() amp。 PreparedStatement stmt = con .prepareStatement(select * from Client where ID = ? } else {// 如果用 戶 記錄存在 ， 則跳轉到 用 戶查詢結 果 框架 new ClientQueryResult(ID, Name)。 try { Connection con = ()。 ( null 賬 號 +ID+充值成 功 ，可用余 額 為： +newBalance 充值成 功 ) }catch(Exception e){ () } } 第 29 頁 共 35 頁 第五章 系統測試 功能測試 功能測試需要參照上面的詳細功能需求分析來設計測試用例，每個功能都要測試到， 功能測試是系統最基本的測試。 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 自動結 賬 下機，不顯 示 本次上機信息 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 統采用表格形式顯示數據，利用鼠標右鍵菜單來實現功能，操作簡單，但是整體風格不夠美觀，互動性不夠強。設計工作完成后，主要精力集中于系統的實現上。 雖然通過系統的軟件測試方法的檢測，但是該 網吧計費 系統還存在著一些潛在的缺陷： 該系統在設計實現時對用戶的信息存儲量沒有很好的估計，所以在以后的實際使用中，可能會出現一些數據庫容量的限制問題。 感謝這篇論文所涉及到的各位學者 .本文引用了數位學者的研究文獻 ,如果沒有各位學者的研究成果的幫助和啟發 ,我將很難完成本篇論文的寫作。 感謝學院的同學們，他們在我平時的學習和生活中給了我很大的幫助，尤其是寢室的同學們，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！使得我們的畢業設計更加完備。我相信“不積跬步無以至千里，不積小流無以成江海”，只要我們努力的用知識充實自己和武裝自己，在我們即將踏入的人生大學中，我們必定會帶 著信心和微笑去面對，相信成功必定屬于我們。80s. We sat on the back of pickup trucks for hours. The sky was blue, and we couldn39。s performers of the troupe still tour the region39。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