See now how JSP is handle claim of HTTP. In basic claim model, a claim directly was send to JSP page in. The code of JSP controls to carry on hour of the logic processing and module of JavaBeanses' hand over with each other, and the manifestation result in dynamic state bornly, mixing with the HTML page of the static state HTML code. The Beans can be JavaBeans or module of EJBs. Moreover, the more complicated claim model can see make from is request other JSP pages of the page call sign or Java Servlets.
The engine of JSP wants to chase the code of Java that the label of JSP, code of Java in the JSP page even all converts into the big piece together with the static state HTML contents actually. These codes piece was organized the Java Servlet that customer can not see to go to by the engine of JSP, then the Servlet edits and translate them automatically byte code of Java.
Thus, the visitant that is the website requests a JSP page, under the condition of it is not knowing, an already born, the Servlet actual full general that prepared to edit and translate completes all works, very concealment but again and efficiently. The Servlet is to edit and translate of, so the code of JSP in the web page does not need when the every time requests that page is explain. The engine of JSP need to be edit and translate after Servlet the code end is modify only once, then this Servlet that editted and translate can be carry out. The in view of the fact JSP engine auto is born to edit and translate the Servlet also, need not procedure member begins to edit and translate the code, so the JSP can bring vivid sex that function and fast developments need that you are efficiently.
Compared with the traditional CGI, the JSP has the equal advantage. First, on the speed, the traditional procedure of CGI needs to use the standard importation of the system to output the equipments to carry out the dynamic state web page born, but the JSP is direct is mutually the connection with server. And say for the CGI, each interview needs to add to add a progress to handle, the progress build up and destroy by burning constantly and will be a not small burden for calculator of be the server of Web. The next in order, the JSP is specialized to develop but design for the Web of, its purpose is for building up according to the Web applied procedure, included the norm and the tool of a the whole set. Use the technique of JSP can combine a lot of JSP pages to become a Web application procedure very expediently.
原文来源:B.原文翻译
JSP技术
Java Server Pages(JSP)是一种基于web的脚本编程技术,类似于网景公司的服务器端Java脚本语言—— server-side JavaScript(SSJS)和微软的Active Server Pages(ASP)。与SSJS和ASP相比,JSP具有更好的可扩展性,并且它不专属于任何一家厂商或某一特定的Web服务器。尽管JSP规范是由Sun公司制定的,但任何厂商都可以在自己的系统上实现JSP。
在Sun正式发布JSP(Java Server Pages)之后,这种新的Web应用开发技术很快引起了人们的关注。JSP为创建高度动态的Web应用提供了一个独特的开发环境。按照Sun的说法,JSP能够适应市场上包括Apache WebServer、IIS4.0在内的85%的服务器产品。论文网
本文将介绍JSP相关的知识,以及JavaBean的相关内容,当然都是比较粗略的介绍其中的基本内容,仅仅起到抛砖引玉的作用,如果读者需要更详细的信息,请参考相应的JSP的书籍。
1.1 概述
JSP(Java Server Pages)是由Sun Microsystems公司倡导、许多公司参与一起建立的一种动态网页技术标准,其在动态网页的建设中有其强大而特别的功能。JSP与Microsoft的ASP技术非常相似。两者都提供在HTML代码中混合某种程序代码、由语言引擎解释执行程序代码的能力。下面我们简单的对它进行介绍。
JSP页面最终会转换成servlet。因而,从根本上,JSP页面能够执行的任何任务都可以用servlet来完成。然而,这种底层的等同性并不意着servlet和JSP页面对于所有的情况都等同适用。问题不在于技术的能力,而是二者在便利性、生产率和可文护性上的不同。毕竟,在特定平台上能够用Java编程语言完成的事情,同样可以用汇编语言来完成,但是选择哪种语言依旧十分重要。
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