Download Advanced JavaServer Pages by David Geary PDF

By David Geary

Millions of builders have chanced on that JavaServer Pages signify the optimum resolution for cross-platform web-based improvement. Now that they have mastered the fundamentals of JSP, many are seeking for to deepen and enhance their services. In complicated JavaServer Pages, best-selling Java writer and previous JavaSoft developer David Geary provides the delicate enterprise-class options they are looking for. Geary tackles JavaServer Pages 1.1 with a similar exhaustive, authoritative strategy that made his photo Java books such a success. He starts with a radical evaluation of JSP parts, servlets, and JavaBeans; then introduces customized and physique tags; and provides refined insights into JSP-based internet program layout. complicated JavaServer Pages contains targeted chapters on internationalization, protection, databases, electronic mail integration, and company JavaBeans. for each Java developer attracted to growing server-side courses with JavaServer Pages and Sun's servlet applied sciences

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Example text

It's a bit more work for tag handlers to create scripting variables, but the simplification of the tag's JSP page is usually worth the effort. String'/> Item: <%= item %>
versus a scripting variable: Item: <%= item %>
29 Advanced JavaServer Pages Both implementations of the iterate tag listed above are discussed in “Iteration” and “Scripting Variables” . This chapter begins with a discussion of custom tags that can iterate and manipulate their body content.

JSP and JavaScript are a powerful combination of client- and server-side technologies for creating flexible and complex web applications. Custom tags can encapsulate JSP and JavaScript functionality in a format familiar to web page authors. Nested Tags Top-level tags can communicate by storing objects in a particular scope through the page context, as outlined above. Nested tags can do the same, but they can also communicate directly with the static findAncestorWithClass(Tag, Class) method from TagSupport.

CUSTOM TAG ADVANCED CONCEPTS Topics in this Chapter • • • • • • Body Tag Handlers Iteration Scripting Variables - Storing Beans in Page Scope - Specifying Scripting Variable Information - Associating a Tag Handler and Scripting Variables - Using Custom Tag IDs Body Content - Understanding How Body Content Works - Generating JavaScript Nested Tags - Locating Ancestor Tags - Sharing Data Conclusion Sophisticated custom tags often manipulate their body content; for example, a custom tag could wrap its body content in an HTML SELECT tag, so that tag might be used like this— ...

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