【導(dǎo)讀】是一個難點，頻繁對數(shù)據(jù)庫的連接與關(guān)閉操作、多客戶對數(shù)據(jù)庫的并發(fā)訪問,一定程度上決定了WEB系統(tǒng)的響應(yīng)以及應(yīng)用性能。使用數(shù)據(jù)庫連接池方式能對。文章通過介紹、分析數(shù)據(jù)庫連接池工。作的基本原理，了解目前流行的WEB服務(wù)器在數(shù)據(jù)庫連接池方面的使用現(xiàn)狀后，總結(jié)一了些數(shù)據(jù)庫連接池開發(fā)程序中容易忽略的問題。并在學(xué)習(xí)掌握了實現(xiàn)連。據(jù)庫資源變得相對高效和容易，從實際上論證了這種設(shè)計方案的可行性。

　　

【正文】 [6] 張聰 ,王福川 ,劉啟元 .計算機系統(tǒng)應(yīng)用 [M].北 京 :電子工業(yè)出版社 ,2020。 [7] 李昌一 ,宋中山 .基于 Java的數(shù)據(jù)庫連接池設(shè)計與實現(xiàn) [M].合肥 :安徽工業(yè)大學(xué)出版社 ,2020。 第 21 頁 共 22 頁 致 謝 本文是在何林波老師的熱情關(guān)心和指導(dǎo)下完成的，他淵博的知識和嚴(yán)謹(jǐn)?shù)闹螌W(xué)作風(fēng)使我受益匪淺，對順利完成本課題起到了極大的作用。在此向他表示我最衷心的感謝！ 在論文完成過程中，本人還得到了文蓉老師和魏鴻飛同學(xué)的熱心幫助，本人向他們表示深深的謝意！ 最后向在百忙之中評審本文的各位專家、老師表示衷心的感謝！ 作者簡介： 姓 名：房立明 性別：男 出生年月： 1984 年 5月 民族：漢 Email: 第 22 頁 共 22 頁 聲 明 本論文的工作是 2020年 02月至 2020年 06月在成都信息工程學(xué)院網(wǎng)絡(luò)工程系完成的。文中除了特別加以標(biāo)注地方外，不包含他人已經(jīng)發(fā)表或撰寫過的研究成果，也不包含為獲得成都信息工程學(xué)院或其他教學(xué)機構(gòu)的學(xué)位或證書而使用過的材料。除非另有說明，本文的工作是原始性工作。 關(guān)于學(xué)位論文使 用權(quán)和研究成果知識產(chǎn)權(quán)的說明： 本人完全了解成都信息工程學(xué)院有關(guān)保管使用學(xué)位論文的規(guī)定，其中包括： （ 1）學(xué)校有權(quán)保管并向有關(guān)部門遞交學(xué)位論文的原件與復(fù)印件。 （ 2）學(xué)校可以采用影印、縮印或其他復(fù)制方式保存學(xué)位論文。 （ 3）學(xué)?？梢詫W(xué)術(shù)交流為目的復(fù)制、贈送和交換學(xué)位論文。 （ 4）學(xué)校可允許學(xué)位論文被查閱或借閱。 （ 5）學(xué)校可以公布學(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）。 除非另有科研合同和其他法律文書的制約，本論文的科研成果屬于成都信息工程學(xué)院。 特此聲明！ 作者簽名： 2020 年 06 月 日 第 23 頁 共 22 頁 Are you hungry now? No, I am tired and lazy now。 if I pursue you I will not catch you, and if I catch youthrough your own slowness and clumsinessI will not kill you, and if I kill you I will not eat you. Nicholas had begun to back away, and at the last。 words, realizing that they were a signal, he turned and began to run, splashing through the shallow water. Ignacio ran after him, much helped by his longer legs, his hair flying behind his dark young face, his square teetheach white as a bone and as big as Nicholas39。s thumbnailshowing like spectators who lined the railings of his lips. Don39。t run, N icholas, Dr. Island said with the voice of a wave. It only makes him angry that you run. N icholas did not answer, but cut to his left, up the beach and among the trunks of the palms, sprinting all the way because he had no way of knowing Ignacio was not right behind him, about to grab him by the neck. When he stopped it was in the thick jungle, among the boles of the hardwoods, w here he leaned,.。 out of breath, the thumping of his own heart the only39。 . sound in an atmosphere silent and unwa ked as Earth39。s long, prehuman day. For a time he listened for any sound Ignacio might make searching for him。 there was none. He drew a deep breath then and said, Well, that39。s over, expecting Dr. Island to answer from somewhere。 there was only the green hush. The light was still bright and strong and nearly, shadowless, but some interior sense told him the day, was nearly over, and he noticed that such faint shades as he could see stretched long, hor izontal distortions of their objects. He felt no hunger, but he had fasted be39。 fore and knew on which side of hunger he stood。 he was not as strong as he had been only a day past, and by this time next day he would probably be unable to outrun Ignacio. He should, he now realized, have eaten the monkey he had ki lled。 but his stomach revolted at the thought of the raw flesh, and he did not know how he might build a fire, although Ignacio seemed to have done so the night before. Raw fish, even if he were able to c atch a fish, would be as bad, or worse, than raw monkey。 he remembered his effort to open a coconuthe had failed, but it was surely not impossible. His mind was hazy as to what a coconut might contain, but there had to be an edible core, because they were eaten in books. He decided to make a wide sweep through the jungle that would bring him back to the beach well away from Ignacio。 he had several times seen coconuts lying in the sand under the trees. He moved quietly, still a little afraid, trying to think of ways to open the coconut w hen he found it. He imagined himse lf standing before a large and raggedly faceted stone, holding the coconut in both hands. He raised it and smashed it dow n, but when it struc k it was no longer a coconut but Maya39。s head。 he heard her nose cartilage break with a distinct, rubbery snap. Her eyes, as blue as the sky above Madhya Pradesh, the sparkling blue sky of the egg, looked up at him, but he could no longer look into them, they retreated from his own, and it came to him quite suddenly that Lucifer, in falling, must have fallen up, into the fires and the coldness of space, never again to see the warm blues and browns and greens of Earth: 1 was watching Satan fall as lightning from heaven. He had heard that on tape somewhere, but he could not remember where. He had read that on Earth lightning did not e down from the clouds, but leaped up from the plaary surface toward them, never to return. Nicholas. He listened, but did not hear his name again. Faintly water was babbling。 had Dr. Island used that sound to speak to him? He walked toward it and found a little rill that threaded a way among the trees, and followed it. In a hundred steps it grew broader, slowed, and ended in a long blind pool under a dome of leaves. . Diane was sitting on moss on the side opposite him。 she looked up as she saw him, and smiled. Hello, he said. Hello, Nicholas. I thought I heard you. I wasn39。t mistaken after all, was I? I didn39。t think I said anything. He tested the dark water with his foot and found that it was very cold. 第 24 頁 共 22 頁 You gave a little gasp, I fancy. I heard it, and I said to myself, that39。s Nicholas, and I called you. Then I thought I might be wrong, or that it m ight be Ignacio. Ignacio was chasing me. Maybe he still is, but h think he39。s probably given up by now. The girl nodded, looking into the dar k waters of they pool, but did not seem to have heard him. He began to wor k his way around to her, climbing acr oss the sna kelike roots of the crowding trees. Why does Ignacio want to kill me, Diane? Sometimes he wants to kill me, too,