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jsp應(yīng)用框架外文翻譯-jsp程序-展示頁

2025-01-31 06:39本頁面
  

【正文】 ike HTML designers to be working on the presentation while Java engineers sweat the business logic. Using servlets alone encourages mixing markup with business logic, making it difficult for team members to specialize. 大連交通大學(xué)信息工程學(xué)院 2021 屆本科生畢業(yè)設(shè)計(論文)外文翻譯 3 To solve this problem, Sun turned to the idea of using server pages to bine scripting and templating technologies into a single ponent. To build Java Server Pages, developers start by creating HTML pages in the same old way, using the same old HTML syntax. To bring dynamic content into the page, the developer can also place JSP scripting elements on the page. Scripting elements are tags that encapsulate logic that is recognized by the JSP. You can easily pick out scripting elements on JSP pages by looking for code that begins with % and ends with %. To be seen as a JSP page, the file just needs to be saved with an extension of .jsp. When a client requests the JSP page, the container translates the page into a source code file for a Java servlet and piles the source into a Java class file— just as you would do if you were writing a servlet from scratch. At runtime, the container can also check the last modified date of the JSP file against the class file. If the JSP file has changed since it was last piled, the container will retranslate and rebuild the page all over again. Project managers can now assign the presentation layer to HTML developers, who then pass on their work to Java developers to plete the businesslogic portion. The important thing to remember is that a JSP page is really just a servlet. Anything you can do with a servlet, you can do with a JSP. JavaBeans: JavaBeans are Java classes which conform to a set of design patterns that make them easier to use with development tools and other ponents. DEFINITION A JavaBean is a reusable software ponent written in Java. To qualify as a JavaBean, the class must be concrete and public, and have a noargument constructor. JavaBeans expose internal fields as properties by providing public methods that follow a consistent design pattern. Knowing that the property names follow this pattern, other Java classes are able to use introspection to discover and manipulate JavaBean properties. The JavaBean design patterns provide access to the bean’s internal state through two flavors of methods: accessors are used to read a JavaBean’s state。大連交通大學(xué)信息工程學(xué)院 2021 屆本科生畢業(yè)設(shè)計(論文)外文翻譯 1 JSP Application Frameworks What are application frameworks: A framework is a reusable, semiplete application that can be specialized to produce custom applications [Johnson]. Like people, software applications are more alike than they are different. They run on the same puters, expect input from the same devices, output to the same displays, and save data to the same hard disks. Developers working on conventional desktop applications are accustomed to toolkits and development environments that leverage the sameness between applications. Application frameworks build on this mon ground to provide developers with a reusable structure that can serve as the foundation for their own pr
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