【正文】 因此，MySQL不是一個(gè)成熟的數(shù)據(jù)庫產(chǎn)品，至少，還不是。它對于世界上90% 的電子商務(wù)網(wǎng)仍然是相當(dāng)好的，但是，解決了這些問題，包括行級鎖定和事務(wù)控制數(shù)量。把Tomcat和MySQL的結(jié)合Tomcat和MySQL的結(jié)合為你用它來學(xué)習(xí)、開發(fā)和部署JSP應(yīng)用程序提供了一個(gè)強(qiáng)大的、可靠的和免費(fèi)的平臺。而且，最好的是，您開發(fā)的代碼將使用這個(gè)平臺很好地運(yùn)行使用iPlanet和Oracle或WebSphere和SQL Server。作為一個(gè)學(xué)習(xí)工具，兩者的結(jié)合幾乎是“參考實(shí)現(xiàn)“他們（JSP和SQL）各自的協(xié)議。因此，當(dāng)你熟悉了解項(xiàng)目的詳細(xì)情況時(shí)，你不會接到任何惡劣的廠商專有的壞習(xí)慣。此外，你可以享受你正在支持開源軟件活動的知識。開放源碼軟件是根據(jù)多個(gè)公共許可證的編碼，往往是GNU通用公共許可證（GPL）的人免費(fèi)提供。關(guān)于GPL的實(shí)際情況和虛構(gòu)GNU通用公共許可證可能是現(xiàn)存最被歪曲的文件之一，基礎(chǔ)知識分解如下： ，任何人都可以免費(fèi)復(fù)制它，無論以源碼或可執(zhí)行形式或者把它交給其他任何人。 ，并以此作為你的作品的一部分，你不能收取費(fèi)用超出復(fù)制的產(chǎn)品。 許多人解釋這意味著他們不能使用GPL軟件用于商業(yè)目的。沒有什么是更遠(yuǎn)離真理。你不能做的是對大量的來源于GPL產(chǎn)品作為你的產(chǎn)品的部分收取費(fèi)用。 你可以在一個(gè)網(wǎng)站開發(fā)免費(fèi)地使用GPL代碼，因?yàn)槟悴毁u自己的網(wǎng)站作為一個(gè)產(chǎn)品給第三方。 （咨詢公司陷入一個(gè)不可思議的空間，但至今沒有人以便使用GPL而追逐它們。）為什么支持這項(xiàng)活動是很好的？對于這個(gè)問題的答案有兩點(diǎn)：一個(gè)是技術(shù)的和一個(gè)政治的。從技術(shù)上講，這是一件好事，因?yàn)殚_源軟件往往鼓勵(lì)如JSP和JDBC開放標(biāo)準(zhǔn)的開發(fā)，讓您從一個(gè)更大的群體里去選擇你的工具，而不是被鎖定成為一個(gè)廠商的專有解決方案。從政治上來說這是一個(gè)積極的事，因?yàn)樗３终紊系拇蠊镜恼\實(shí)。 WebLogic和iPlanet必須保持競爭力的和響應(yīng)，因?yàn)樗麄冎?，有一個(gè)免費(fèi)的解決方案在那里，如果他們不這樣。而當(dāng)你使用開源軟件，你發(fā)送一條消息，你的首要問題是他們的特點(diǎn)和可靠性，如果出現(xiàn)錯(cuò)誤,沒有一個(gè)大公司提起訴訟。原文出處《MySQL and JSP Web applications 》作者：James TurnerMySQL and JSP Web applicationsJSP developers encounter unique problems when building web applications that require intense database connectivity. MySQL and JSP Web Applications addresses the challenges of building datadriven applications based on the JavaServer Pages development model. MySQL and JSP Web Applications begins with an overview of the core technologies required for JSP database developmentJavaServer Pages, JDBC, and the database schema. The book then outlines and presents an Internet merce application that demonstrates concepts such as receiving and processing user input, designing and implementing business rules, and balancing the user load on the server. Through the JDBC (Java DataBase Connector), the developer can municate with most mercial databases, such as Oracle. The solutions presented in MySQL and JSP Web Applications center on the open source tools MySQL and Tomcat, allowing the reader an affordable way to test applications and experiment with the book39。s examples.So What Is JSP All About? If you meet the requirements mentioned, you should already have a pretty good idea what the answer to this question is. JSP is all about doing highly objectoriented Web sites that can leverage all the best practices of modern software engineering. These practices include things such as SQL databases and UMLbased design. This isn39。t to say that JSP is a cureall and that using it will automatically make your Web site a paragon of engineering art. It39。s just as possible to design bad Web sites in JSP as with any other technology. That39。s why, as you go through the text, you will see how to incorporate the best practices and how to avoid the pitfalls of convenience when projects get stressful. JSP itself is an evolutionary step along the path that started with the first static Web servers, moved through CGIenabled servers, and finally the first generation of scriptenabled servers. JSP is less a Web server with a Java ponent than it is a Java engine that understands the Web.JSP grew out of Java servlets. Servlets allow the developer to handle the ining Web requests using a Java program that has access to all the normal information that a Common Gateway Interface (CGI) program would. In addition, the servlet has access to sessionpersistent objects. These are Java objects that are associated with a specific user session and can be used to store state between