How Do I Specify uri in JSP taglib Directive to Point to the Jar File

Question

I put the trail-taglib-0.2.jar file in the MyApplication/WEB-INF/lib directory.
Because the .tld is included in the trail-taglib-0.2.jar, I added the following In the MyApplication/WEB-INF/web.xml file:
< filter >
  < filter-name > trailFilter < /filter-name >
  < filter-class > org.osjava.taglib.trail.OriginalRequestFilter < /filter-class >
< /filter >
< filter-mapping >
  < filter-name > trailFilter < /filter-name >
  < url-pattern > *.do < url-pattern >
< filter-mapping > How do I specify the uri in my JSP @taglib to point to the jar file? I think I did not get the path right:
< %@ taglib prefix="trail" uri="trail-taglib-0.2" % >

Answer 1

Your advices have been very good. Problems get solved one at a time.
1. Now, the taglib.tld in the WEB-INF directory can be found; however, another problem occurred: XML parsing error on file /WEB-INF/taglib.tld: (line 11, col 17): Element type "display-name" must be declared.
2. no matter where I insert the filter and its mapping in the web.xml file,
  <filter>
   <filter-name>trailFilter</filter-name>
   <filter-class>org.osjava.taglib.trail.OriginalRequestFilter</filter-class>
  </filter>
  <filter-mapping>
   <filter-name>trailFilter</filter-name>
   <url-pattern>*.do</url-pattern>
  </filter-mapping>The server cannot find the Struts tag libraries. If I remove the filter tag and its mapping, the server does not complain anymore. I checked the DTD, the filter tag and its mapping tag should be before the servlet tag and servlet mapping tag. But, it does not work.
Here is the taglib.tld:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.1//EN" "http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd">
<taglib>
  <tlibversion>1.0</tlibversion>
  <jspversion>2.0</jspversion>
  <shortname>trail</shortname>
  <uri>http://www.osjava.org/taglibs/trail-1.0</uri>
  <info>Breadcrumbs in a taglib. </info>
  <display-name>Trail Taglib</display-name>
  <description>The Trail taglib maintains a dynamic trail of pages that the user has hit and allows a normalized version of that trail to be shown as a breadcrumbs list. </description>
  <tag>
    <name>list</name>
    <tagclass>org.osjava.taglib.trail.ListTag</tagclass>
    <bodycontent>JSP</bodycontent>
    <display-name>Trail List</display-name>
    <description>ListTag is used to display the trail, either the whole trail or more likely the normalized version. </description>
  <attribute>
      <name>var</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description>Store the trail text in a variable. This will probably change to store the actual trail list and not the text. </description>
    </attribute>
    <attribute>
      <name>delimiter</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description>The delimiter to use between trail items. It defaults to -> and at some point an image will be useable instead. </description>
    </attribute>
    <attribute>
      <name>type</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description>The type of list to show. The default is 'normalized', while any other type specified will result in 'full'. </description>
    </attribute>
  </tag>
  <tag>
    <name>push</name>
    <tagclass>org.osjava.taglib.trail.PushTag</tagclass>
    <bodycontent>JSP</bodycontent>
    <display-name>Trail Formation</display-name>
    <description>Place a page on the trail. </description>
    <attribute>
      <name>label</name>
      <required>true</required>
      <rtexprvalue>true</rtexprvalue>
      <description>The text to use when placing the page on the trail. This is what will be displayed to the user in the List tag. </description>
    </attribute>
    <attribute>
      <name>url</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description>Usually the url in question will be figured out by the taglib, however you may override it with this attribute. </description>
    </attribute>
  </tag>
</taglib>