<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>el_function_helloworld</display-name>
<welcome-file-list>
<welcome-file>function.jsp</welcome-file>
</welcome-file-list>
<jsp-config>
<taglib>
<taglib-uri> http://jakarta.apache.org/tomcat/functions </taglib-uri>
<taglib-location> /WEB-INF/tlds/functions.tld </taglib-location>
</taglib>
</jsp-config>
</web-app>
这里的taglib-uri的值就是页面中引用的依据。