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322

Chapter 14 Creating Custom JSP Tag Libraries

Listing 14.8 csajsp taglib.tld (continued)

  1.0

  1.1

  csajsp

    A tag library from Core Servlets and JavaServer Pages,

    http://www.coreservlets.com/.

    prime

    coreservlets.tags.PrimeTag

    Outputs a random N digit prime.

    EMPTY

      length

      false

The JSP File

Listing 14.9 shows a JSP document that uses the 

taglib

 directive to load the

tag library descriptor file and to specify a prefix of 

csajsp

. Since the 

prime

tag is defined to permit a 

length

 attribute, Listing 14.9 uses

Remember that custom tags follow XML syntax, which requires attribute

values to be enclosed in either single or double quotes. Also, since the

length

 attribute is not required, it is permissible to use

The tag handler is responsible for using a reasonable default value in such

a case.

Figure 14 3 shows the result of Listing 14.9. 

Second edition of this book: www.coreservlets.com; Sequel: www.moreservlets.com.

Servlet and JSP training courses by book's author: courses.coreservlets.com.