Chapter 14: Creating Custom JSP Tag Libraries

Source Code in This Chapter

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• Simple Syntax Example
  • ExampleTag.java JSP tag handler that just inserts a string ("Custom tag example...") into the output.
  • csajsp-taglib.tld Tag library descriptor file for ExampleTag and others. Note that this file reflects changes from Tomcat 3.1 beta to Tomcat 3.1 final. See csajsp-taglib-tomcat-3.1beta.tld for the version that appeared in the book.
  • SimpleExample.jsp A page that uses the tag handled by ExampleTag.
• Basic Tag
  • SimplePrimeTag.java Tag handler that outputs a random 50-digit prime. Uses the Primes class.
  • csajsp-taglib.tld Tag library descriptor file for SimplePrimeTag and others.
  • SimplePrimeExample.jsp A page that uses the tag handled by SimplePrimeTag.
• Assigning Attributes to Tags
  • PrimeTag.java Tag handler that outputs an N-digit prime number. Extends SimplePrimeTag.
  • csajsp-taglib.tld Tag library descriptor file for PrimeTag and others.
  • PrimeExample.jsp A page that uses the tag handled by PrimeTag.
• Including the Tag Body
  • HeadingTag.java Tag handler that ouputs a fancy HTML "heading" implemented as a table with embedded style sheet information.
  • csajsp-taglib.tld Tag library descriptor file for HeadingTag and others.
  • HeadingExample.jsp A page that uses the tag handled by HeadingTag.
• Optionally Including the Tag Body
  • DebugTag.java Tag handler that includes or omits debugging information depending upon the value of a request time parameter.
  • csajsp-taglib.tld Tag library descriptor file for DebugTag and others.
  • DebugExample.jsp A page that uses the tag handled by DebugTag.
• Manipulating the Tag Body
  • FilterTag.java Tag handler that replaces the HTML-specific characters such as < and > with their character entities (&lt;, &gt;, etc.). Uses the static filter method of the the ServletUtilities class.
  • csajsp-taglib.tld Tag library descriptor file for FilterTag and others.
  • FilterExample.jsp A page that uses the tag handled by FilterTag.
• Including or Manipulating the Tag Body Multiple Times
  • RepeatTag.java Tag handler that repeats the tag body the number of times that the reps attribute specifies.
  • csajsp-taglib.tld Tag library descriptor file for RepeatTag and others.
  • RepeatExample.jsp A page that uses the tag handled by RepeatTag.
• Using Nested Tags
  • Template for nested tags
  • IfTag.java Tag handler for main part of "if" tag (enclosing tag).
  • IfConditionTag.java Tag handler for condition part of "if" tag (first nested tag).
  • IfThenTag.java Tag handler for "then" action part of "if" tag (second nested tag).
  • IfElseTag.java Tag handler for "else" part of "if" tag (third nested tag).
  • csajsp-taglib.tld Tag library descriptor file for IfTag.java, IfConditionTag.java, IfThenTag.java, IfElseTag.java and others.
  • IfExample.jsp A page that uses the tag handled by IfTag etc.
• JSP-Styles.css Style sheet used by JSP documents in this chapter.

General

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