Download e-book for kindle: Core JSTL: Mastering the JSP Standard Tag Library by David Geary

By David Geary

ISBN-10: 0131478230

ISBN-13: 9780131478237

Middle JSTL is an in-depth exam of the JavaServer Pages typical Tag Library (JSTL), which supplies a typical set of customized tags--including tags for new release, gaining access to URLs, database entry, internationalization, and the manipulation and transformation of XML documents--that web content authors and software program builders can use to strengthen websites. The ebook illustrates JSTL's functions with plenty of code snippet and examples. those examples are artistic and useful combos of tags you should use instantaneously! a sophisticated a part of the e-book covers JSTL configuration and integration of Java code with JSTL. JSTL defines an expression language that allows site improvement by way of offering a substitute for Java code in web content. The JSTL expression language additionally permits quick access to info comparable to request parameters and attributes, cookies, and HTML headers. middle JSTL examines all features of this strong new addition to the JavaServer Pages typical, and is written for web page authors and software program builders alike. JSTL is a Java average for constructing dynamic sites. It offers non-programmers entry to robust operations via HTML-like tags.

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Additional resources for Core JSTL: Mastering the JSP Standard Tag Library

Example text

Get(subexpression) , for example, colorMap[Red] and colorMap["Red"] . The former expression is valid only if a scoped variable named Red exists in one of the four JSP scopes and was specified as a key for the map named colorMap . 2 lists the methods that the EL invokes on your behalf. 2. get(pageContext. get("red") JSTL developers rely heavily on maps because the EL provides 11 indispensable implicit objects, of which 10 are maps. Everything, from request parameters to cookies, is accessed through a map.

Once you've downloaded the Reference Implementation, you can unzip or untar the file that you downloaded in a directory of your choice. Decompressing that file will produce a top-level directory, so you don't have to worry about scattering files about in the directory of your choice. Now you know how to download and install the reference implementation. In "A Simple JSTL Web Application" on page 30, we discuss how to use it. The following two sections discuss how to download and install Tomcat and Resin.

72. Attribute values can also be specified as strings, like this: The string specified for the value attribute in the preceding code fragment is coerced to the type expected by that attribute. Finally, attribute values can consist of one or more expressions intermixed with strings, like this: In the previous code fragment, each of the four expressions is evaluated in order from left to right, coerced to a string, and concatenated with the intermixed text.

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Core JSTL: Mastering the JSP Standard Tag Library by David Geary

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