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Chapter 14 Creating Custom JSP Tag Libraries

Listing 14.5 csajsp taglib.tld (continued)

    simplePrime

    coreservlets.tags.SimplePrimeTag

    Outputs a random 50 digit prime.

    EMPTY

The JSP File

JSP documents that make use of custom tags need to use the 

taglib

 directive,

supplying a 

uri

 attribute that gives the location of the tag library descriptor file

and a 

prefix

 attribute that specifies a short string that will be attached (along

with a colon) to the main tag name. Listing 14.6 shows a JSP document that uses

<%@ taglib uri="csajsp taglib.tld" prefix="csajsp" %>

to use the TLD file just shown in Listing 14.5 with a prefix of 

csajsp

. Since

the base tag name is 

simplePrime

, the full tag used is 

Figure 14 2 shows the result. 

Listing 14.6 SimplePrimeExample.jsp