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基于jsp的畢業(yè)設(shè)計(jì)選題系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn)—計(jì)算機(jī)畢業(yè)設(shè)計(jì)(留存版)

  

【正文】 pache 和 Tomcat 的配置文件即可。 JSP 經(jīng)典實(shí)例 [M].北京: 中國(guó)電力出版社, 2020。 ()。 (clsName,num)。 (rverDriver)。 選定 —— 學(xué)生選擇 系主任審核 過(guò)后 的題目,學(xué)生可以根據(jù)個(gè)人愛(ài)好與實(shí)際情況選擇第一,第二,第三和其他四個(gè)志愿等待老師審核。39。 d).當(dāng)用戶選擇的類型正確 ,帳號(hào)也正確但密碼錯(cuò)誤系統(tǒng)將提示用戶使用帳號(hào)密碼錯(cuò)誤 ,請(qǐng)核對(duì)信息后重新登陸。它們各自功能如下敘述: (1)學(xué)生在線選題 學(xué)生 通過(guò)系主任錄入的學(xué)生 信息,姓名,學(xué)號(hào)和密碼登陸系統(tǒng)進(jìn)行查詢題目并且進(jìn)行選題 并且可以修改自己的登陸密碼。 同時(shí),我們?yōu)榱耸贡?系統(tǒng)更加的符合我們的實(shí)際,教師能在線出題,但是所出的題目必須經(jīng)過(guò)系主任的審核后學(xué)生才能進(jìn)行選擇。作為J2EE 體系中的重要一環(huán), JSP 為創(chuàng)建高度動(dòng)態(tài)的 Web 應(yīng)用提供了一個(gè)獨(dú)特的開(kāi)發(fā)環(huán)境。另外一種考試系統(tǒng)采用 Web 技術(shù)實(shí)現(xiàn)。 我們采用了 JSP 技術(shù)為主要手段 ,本系統(tǒng)采用了多級(jí)角色管理:包括 系統(tǒng)管理員、 系主任,學(xué)生 和 老師幾 種權(quán)限 .本文主要 介紹 了用戶權(quán)限的劃分 , 并詳細(xì)地論述了系統(tǒng)設(shè)計(jì)的思想和實(shí)現(xiàn)的方法步驟從而為以后的研究打下了基礎(chǔ)。 Inter 大大方便了信息的傳播 ,給人們帶來(lái)了全新得生活方式。這一點(diǎn)正好符合了 選題 系統(tǒng)所要求的實(shí)時(shí)性。 JDBC 提供了一種基準(zhǔn),據(jù)此可以構(gòu)建更高級(jí)的工具和接口,使數(shù)據(jù)庫(kù)開(kāi)發(fā)人員能夠編寫數(shù)據(jù)庫(kù)應(yīng)用 程序 。用戶的需求具體體現(xiàn)在各種信息的提供、保存、更新和查詢,這就要求數(shù)據(jù)庫(kù)結(jié)構(gòu)能充分滿足各種信息的輸入和輸出。 2 各系主任登陸系統(tǒng)后可以對(duì)自身的信息進(jìn)行維護(hù),以及為本系的教師和學(xué)生創(chuàng)建系 統(tǒng)用戶,各系只能查看本系的相關(guān)信息。 (session_id,sessionId)。 凍結(jié) —— 當(dāng)系統(tǒng)用戶的帳號(hào)到期,管理員和系主任就要對(duì)用戶信息凍結(jié)。 ⑵ 增加:可以增加自己的論文題目,但必須是在自己所選的題目未被老師審核的情況下。 ()。 (DEBUG)。要保持良好的動(dòng)態(tài)性就要求與數(shù)據(jù)庫(kù)有良好的連接。 WAR 是 Sun 提出的一種Web 應(yīng)用程序格式,與 JAR 類似,也是許多文件的一個(gè)壓縮包。 ( 5)學(xué)??梢怨紝W(xué)位論文的全部或部分內(nèi)容(保密學(xué)位論文在解密后遵守此規(guī)定)。 特此聲明! 作者簽名: 年 月 日 Really of no one? Robert Jordan asked her. Of no one. No one. Neither in joke nor in seriousness. Nor of thee either. No? Robert Jordan said and he could feel the thickness ing in his throat again. Good. I have no time for any woman. That is true. Not fifteen minutes? the gypsy asked teasingly. Not a quarter of an hour? Robert Jordan did not answer. He looked at the girl, Maria, and his throat felt too thic k for him to trust himself to speak. Maria looked at him and laughed, then blushed suddenly but kept on looking at him. You are blushing, Robert Jordan said to her. Do you blush much? Never. You are blushing now. Then I will go into the cave. Stay here, Maria. No, she said and did not smile at him. I will go into the cave now. She picked up the iron plate they had eaten from and the four forks. She moved awkwardly as a colt moves, but w ith that same grace as of a young animal. Do you want the cups? she asked. Robert Jordan was still looking at her and she blushed again. Don39。通常在 WEBINF目錄下有一個(gè) 文件和一個(gè) classes 目錄, 是這個(gè)應(yīng)用的配置文件,而 classes 目錄下則包含編譯好的 Servlet 類和 Jsp 或 Servlet所依賴的其它類(如 JavaBean)。 這次的畢業(yè)設(shè)計(jì) 選 題 系統(tǒng) 雖然實(shí)現(xiàn)了一些功能但是還是存在一些問(wèn)題和缺陷, 但是我還是通過(guò)親自參加畢業(yè)設(shè)計(jì)使自己的知識(shí)得到提高 ,并且我充分體會(huì)到理論與實(shí)踐之間的重要聯(lián)系 ,更一步的了解了 JAVA 和數(shù)據(jù)庫(kù)的知識(shí)。 //存儲(chǔ)郵件 信息 Transport transport = (smtp)。 /** * 釋放數(shù)據(jù)庫(kù)連接 * param conn 欲釋放回連接池的連接 */ Public void freeConnection(Connection conn, String clsName) { try { if (conn != null) { ()。 ⑷ 修改:可以修改自己的論文題目以及志愿信息。我們?cè)O(shè)計(jì)這系統(tǒng)是考慮的是凍結(jié)用戶帳號(hào)而不是刪除它凍結(jié)后系統(tǒng)將 避免不必要 的信息丟失。 (login_ip,remoteIp)。 1)系統(tǒng)管理 ( = 0) 2)系主任 ( = 1) 3)指導(dǎo)教師 ( = 2) 4)學(xué)生 ( = 3) 系統(tǒng)登陸 為了保證 用戶信息的一致性 、 用戶操作的方便性以及方便系統(tǒng)的安全模塊升級(jí)和維護(hù),該系統(tǒng)采用單點(diǎn)登陸的模式。 數(shù)據(jù)庫(kù)的概念結(jié)構(gòu)設(shè)計(jì)完畢以后,現(xiàn)在可以將上面的數(shù)據(jù)庫(kù)概念結(jié)構(gòu)轉(zhuǎn)化為某種數(shù)據(jù)庫(kù)系統(tǒng)所支持的實(shí)際數(shù)據(jù)模型,也就是數(shù)據(jù)庫(kù)的邏輯結(jié)構(gòu)。同時(shí) JDBC 擴(kuò)展了 Java 的功能。除此之外,作為 Java 平臺(tái)的一部分, JSP 擁有 Java 語(yǔ)言 “ 一次編寫,各處運(yùn)行 ” 的特點(diǎn)。基于 Web 技術(shù)的網(wǎng)絡(luò)選題系統(tǒng)可以借助于遍布全球的 Inter 進(jìn)行 ,因此選題既可以在本地進(jìn)行 ,也可以在異地進(jìn)行 ,大 大拓展了選題的靈活性。畢業(yè)生以班級(jí)為單位的原始手工報(bào)送的選題方式已經(jīng)不能適應(yīng)時(shí)代發(fā)展的需求, 所以基與互聯(lián)網(wǎng)的畢業(yè)設(shè)計(jì)選題系統(tǒng)也就孕育而生了。因此 ,采用網(wǎng)絡(luò)選題方式將是以后的大趨勢(shì)。所以JSP 是實(shí)現(xiàn)本系統(tǒng)的最佳技術(shù),它是完全可行的。在本系統(tǒng)中,我考慮了 4種權(quán)限(管理員,系主任,指導(dǎo)教師,學(xué)生)。 1)操作系統(tǒng): WINDOWS 2020 2)應(yīng)用服務(wù)器: TOMCAT 3)數(shù)據(jù)庫(kù): SQL2020 4)JAVA VM: JDK 5)硬件 :建議內(nèi)存在 512M 以上 4 系統(tǒng)設(shè)計(jì) 功能設(shè)計(jì) 在線選題系統(tǒng) 的 功能主要包括三部分: 用戶管理、教師題庫(kù)信息管理、學(xué)生在線選題信息管理 。 b).當(dāng)輸入系統(tǒng)不存在的帳號(hào)進(jìn)行登陸時(shí) ,系統(tǒng)將提示拒絕登陸并提示用戶登陸帳號(hào)不存在。 } 系統(tǒng)管理員和系主任同時(shí)公用同一組界面 ,但在界面上對(duì)操作權(quán)限也進(jìn)行了控制。 個(gè)人信息維護(hù) 當(dāng)用戶進(jìn)入系統(tǒng)后可以通過(guò)點(diǎn)擊 “個(gè)人信息維護(hù)” 對(duì)自己的個(gè)人信息進(jìn)行修 改,可以修改密碼,郵箱聯(lián)系方式等個(gè)人資料,見(jiàn)圖 8: 圖 8:個(gè)人信 息維護(hù) 擬定 —— 教師擬訂 畢業(yè)設(shè)計(jì) 題目, 并提交 系主任審核 。 系統(tǒng)的數(shù)據(jù)庫(kù)連接池、郵件系統(tǒng)和數(shù)據(jù)導(dǎo)入功能的實(shí)現(xiàn)主要是使用第三方組件進(jìn)行開(kāi)發(fā),例如數(shù)據(jù)庫(kù)連接池主要使用 , ,郵件系統(tǒng)主要使用 , ,數(shù)據(jù)導(dǎo)入時(shí),使用的文件上傳的組件 。 if (num==null) num = (0)。 (發(fā)送郵件成功! )。 [2] 張躍平 .JAVA2 實(shí)用教程 [M].北京: 清華大學(xué)出版社, 2020。但是與 Apache 相比,它的處理靜態(tài) Html 的能力就不如 Apache。s a Lewis gun, Robert Jordan thought. Do you know anything about a machine gun? he asked the old man. Nada, said Anselmo. Nothing. And thou? to the gypsy. That they fire with much rapidity and bee so hot the barrel burns the hand that touches it, the gypsy said proudly. Every one knows that, Anselmo said with contempt. Perhaps, the gy psy said. But he asked me to tell what I know about a _m 醧 uina_ and I told him. Then he added, Also, unlike an ordinary rifle, they continue to fire as long as you exert pressure on the trigger. Unless they jam, run out of ammunition or get so hot they melt, Robert Jordan said in English. What do you say? Anselmo asked him. Nothing, Robert Jordan said. I was o a pistol. He kept waving the pistol and shouting at them and we were all shooting at him but no one hit him. Then some troops lay down and menced firing and the officer walked up and down behind them with his pistol and still we could not hit him and t he _m 醧 uina_ could not f ire on him because of the position of the train. This officer shot two men as they lay and still they would not get up and he was cursing them and finally they got up, one tw o and three at a time and cam e running toward us and the train. Then they lay flat again and fired. Then we left, with the _m 醧 uina_ still speaking over us as we left. It was then I found the girl where she had run from the train to the rocks and she r an with us. It was those troops who hunted us until that night. It must have been something very hard, Anselmo said. Of much emotion. It was the only good thing we have done, said a deep voice. What are you doing now, you lazy drunken obscene unsayable son of an unnameable unmarried gypsy obscenity? What are you doing? Robert Jordan saw a woman of about fifty almost as big as Pablo, almost as wide as she was tall, in blac k peasant skirt and waist, with heavy wool soc ks on heavy legs, black ropesoled shoes and a
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