The Insider's Guide to Next-Generation BPM
By Adam Kolawa, Parasoft , 07/29/2002
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JavaServer Pages (JSP), an extension of Sun Microsystems' Java Servlet technology for creating Web applications, allows developers to embed Java code directly into HTML Web pages. Aimed at speeding Web application development, JSP separates the Web interface logic from the back-end content generation logic so that Web designers and Web developers can work on the same Web page without getting in each other's way.
JSP offers several significant advantages over the other technologies that
fuel dynamic applications:
It makes it easier for individual team members to focus on the parts of Web pages that most concern them. Because JSP files look like HTML files with extra tags, designers can easily modify page layout, graphics, colors and so on without having any (or only very basic) knowledge about Java. On the other hand, developers can easily test application flow and logic by creating raw JSP files and leaving graphical design details for designers.
It makes the presentation and logic easier to understand. Clean JSP files present the HTML with very few other tags, so it is easy to look at the page and determine what the resulting page will look like. Moreover, JSP frees the Java code from statements about how to produce HTML code so it can focus entirely on the application logic. The increased code focus and clarity allow for faster development.
It creates a relatively simple way to change the application's look and feel (or even produce alternative sets of pages for different purposes) without having to change the application's logic. For example, you could produce one set of pages for WML browsers, a different set for regular HTML browsers and yet another set that uses XML--all without touching the actual logic implementing the application. In this scenario, the testing performed on one version's application logic would carry over to the other versions, reducing the number of bugs overall.
However, because JSP blends Java and HTML (or XML) to create a new paradigm, it not only inherits the pitfalls of its borrowed languages but is also fraught with new problems unique to the mixture. In this article, we'll provide a handful of testing tips that should help you improve the reliability of your applications that use JSP.
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