One of the major change for this 2.4 version of web.xml is the ordering of tags. As the use of XML Schema provides the flexibility on the ordering of tags, you can put the tag in any ordering as you like.
Besides this, one another change is the use of tag library. Starting from 2.4, we have to surround all <taglib> with a new tag <jsp-config>, as required by the mechanism of XML Schema, like the following:
<web-app xmlns=”http://java.sun.com/xml/ns/j2ee”
xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance”
xsi:schemaLocation=”http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd”
version=”2.4″><description>StrutsTest</description>
<jsp-config>
<taglib>
<taglib-uri>http://jakarta.apache.org/tomcat/debug-taglib</taglib-uri>
<taglib-location>/WEB-INF/jsp/debug-taglib.tld</taglib-location>
</taglib></jsp-config>
</web-app>
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