【正文】 和密碼消息，系統(tǒng)返回驗(yàn)證消息；管理員對(duì)用戶(hù)發(fā)出增刪改查消息，系統(tǒng)返回顯示信息消息；管理員對(duì)系統(tǒng)發(fā)出推出消息，如圖 142。 }else {// 如 果賬 戶(hù) 存在，則 保 存查詢(xún)結(jié) 果 ，做進(jìn)一 步 判斷 (Logined)。 try { ()。 String jpw3 = new String(())。//修改密碼成 功 (null, 輸入的 舊 密碼錯(cuò) 誤 , 系統(tǒng)提 示,)。查詢(xún)累計(jì)時(shí)間，只需要在選擇菜單項(xiàng)時(shí)， 獲取當(dāng)前系統(tǒng)時(shí)間，跟開(kāi) 始時(shí)間進(jìn)行運(yùn)算即可得到時(shí)間差，實(shí)現(xiàn)如下： 第 21 頁(yè) 共 35 頁(yè) Date DBeginTime = new SimpleDateFormat(yyyy/MM/dd/HH:mm).parse(BeginTime)。 // 相差的 天 數(shù) long hour = (seconds day * 24 * 60 * 60) / (60 * 60)。//把時(shí)間 差 化成分鐘 // 四舍五 入 算法 new BigDecimal(Fee)。 Fee = (float) (2, ) .doubleValue()。//把時(shí)間 差 化成分鐘 // 四舍五 入 算法 new BigDecimal(Fee)。 } } 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(hù)相同，不再贅述，現(xiàn)在講解管理員與用戶(hù)不同的功能。// 增加新 的 一行 boolean Available = true。 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(kù)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(kù)則執(zhí)行 insert，如 果已入庫(kù)，則執(zhí)行 update（見(jiàn)下文的“修改”部分），實(shí)現(xiàn)如下： String ID = (String) (row, 0)。 String Rank = (String) (row, 4)。 } else {// 查詢(xún)是 否 記錄已經(jīng) 存 在 try { Connection con = ()。 if (()) {// 如果記 錄 已存在 (null, 該 賬 戶(hù) 已 經(jīng)存 在 , 系統(tǒng)提 示 , )。 (3, Password)。 PreparedStatement stmt = con .prepareStatement(sql1+where ID = ?)。 // 無(wú)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(kù)的行不 會(huì) 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(hù) 記錄存在 ， 則跳轉(zhuǎn)到 用 戶(hù)查詢(xún)結(jié) 果 框架 new ClientQueryResult(ID, Name)。 try { Connection con = ()。 ( null 賬 號(hào) +ID+充值成 功 ，可用余 額 為： +newBalance 充值成 功 ) }catch(Exception e){ () } } 第 29 頁(yè) 共 35 頁(yè) 第五章 系統(tǒng)測(cè)試 功能測(cè)試 功能測(cè)試需要參照上面的詳細(xì)功能需求分析來(lái)設(shè)計(jì)測(cè)試用例，每個(gè)功能都要測(cè)試到， 功能測(cè)試是系統(tǒng)最基本的測(cè)試。 CaseID CurrentBalance Expected 13 提示 “ 余額不 足 ，請(qǐng)速到前 臺(tái) 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(cè)試用例 第 30 頁(yè) 共 35 頁(yè) 性能測(cè)試 （ 1） 易用性和界 （ 2） 面測(cè)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(lái)實(shí)現(xiàn)功能，操作簡(jiǎn)單，但是整體風(fēng)格不夠美觀，互動(dòng)性不夠強(qiáng)。設(shè)計(jì)工作完成后，主要精力集中于系統(tǒng)的實(shí)現(xiàn)上。 雖然通過(guò)系統(tǒng)的軟件測(cè)試方法的檢測(cè)，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(duì)用戶(hù)的信息存儲(chǔ)量沒(méi)有很好的估計(jì)，所以在以后的實(shí)際使用中，可能會(huì)出現(xiàn)一些數(shù)據(jù)庫(kù)容量的限制問(wèn)題。 感謝這篇論文所涉及到的各位學(xué)者 .本文引用了數(shù)位學(xué)者的研究文獻(xiàn) ,如果沒(méi)有各位學(xué)者的研究成果的幫助和啟發(fā) ,我將很難完成本篇論文的寫(xiě)作。 感謝學(xué)院的同學(xué)們，他們?cè)谖移綍r(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?cè)谖业恼撐耐瓿蛇^(guò)程中給我提供了許多寶貴的信息、意見(jiàn)和幫助！使得我們的畢業(yè)設(shè)計(jì)更加完備。我相信“不積跬步無(wú)以至千里，不積小流無(wú)以成江?！?，只要我們努力的用知識(shí)充實(shí)自己和武裝自己，在我們即將踏入的人生大學(xué)中，我們必定會(huì)帶 著信心和微笑去面對(duì)，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