Servlets and JavaServer Pages¿: The J2EE¿ Technology Web by Jayson Falkner

By Jayson Falkner

Covers the fundamentals together with fitting a JSP/Servlet surroundings in your computing device, HTTP, HTML, kinds, JSP 2.0, Servlets 2.4, customized tag libraries and the JSTL 1.0. The textual content additionally covers subject matters of errors dealing with, layout styles, internationalization and multilingual websites, defense and administration.

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4 JSTL Design Principles This chapter concludes with a discussion of some fundamental JSTL design principles. To make the best use of JSTL, you should understand those design principles; they apply to many, if not all, of the JSTL actions. amount}'/> Some attribute names, such as var and scope , are used by many JSTL actions and always have the same semantic value. The next section discusses those attributes. Scoped Variables vs. Scripting Variables Actions are a conduit between JSP pages and Java code.

3. For other platforms, such as Mac OSX, check to see if a Java 2 implementation is preinstalled. 2 APIs. 2 (or later). See "Tomcat " on page 26 and "Resin" on page 28, for more information about those servlet containers. Finally, of course, you need a JSTL implementation. Some servlet containers, such as Resin, already offer their own JSTL implementations, but as this book went to press, those implementations were immature. To test this book's examples, I recommend you use the JSTL Reference Implementation, which is discussed in "The JSTL Reference Implementation" on page 24.

Amount}'/> Some attribute names, such as var and scope , are used by many JSTL actions and always have the same semantic value. The next section discusses those attributes. Scoped Variables vs. Scripting Variables Actions are a conduit between JSP pages and Java code. Through that conduit flows information from JSP page to Java code, and vice versa. For example, consider this code: value =
In the preceding code fragment, the JSP page uses the action to send information—such as the value of the var attribute, which represents the current item in the iteration—to the tag's handler, which is written in the Java programming language.

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