<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" 
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">  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <error-page>
   <error-code>404</error-code>
   <location>/WEB-INF/NoSuchPage.jsp</location>
  </error-page>
</web-app>出现cvc-pattern-valid:value'WEB-INF/NoSuchPage.jsp'is not not facet-valid with respect to pattern'/.*' for type null!
请问怎么解决!