一个关于struts tag得问题

web.xml:
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<display-name>My Web Application</display-name>
<description>
A application for test.
</description>
<servlet> 
          <servlet-name>action</servlet-name>   
          <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>  
          <init-param>   
              <param-name>application</param-name>   
              <param-value>ApplicationResources</param-value>   
          </init-param>    
          <init-param>   
              <param-name>config</param-name>   
              <param-value>/WEB-INF/struts-config.xml</param-value>   
          </init-param>   
          <init-param>   
              <param-name>debug</param-name>   
              <param-value>0</param-value>   
          </init-param>   
          <init-param>   
              <param-name>detail</param-name>   
              <param-value>0</param-value>   
          </init-param>   
          <init-param>   
              <param-name>validate</param-name>   
              <param-value>true</param-value>   
          </init-param>   
          <load-on-startup>2</load-on-startup>   
</servlet>
<!-- Standard Action Servlet Mapping -->
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping><!--The welcome file list-->
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
<welcome-file>index.html</welcome-file>
</welcome-file-list><!--Struts Tag Library Descriptor-->
<taglib>
<taglib-uri>
/WEB-INF/struts-bean.tld
</taglib-uri>
<taglib-location>
/WEB-INF/struts-bean.tld
</taglib-location>
</taglib>
<taglib>
<taglib-uri>
/WEB-INF/struts-html.tld
</taglib-uri>
<taglib-location>
/WEB-INF/struts-html.tld
</taglib-location>
</taglib>
<taglib>
<taglib-uri>
/WEB-INF/struts-logic.tld
</taglib-uri>
<taglib-location>
/WEB-INF/struts-logic.tld
</taglib-location>
</taglib>
<taglib>
        <taglib-uri>
/WEB-INF/struts-template.tld
</taglib-uri>
<taglib-location>
/WEB-INF/struts-template.tld
</taglib-location>
</taglib>
</web-app> struts-config.xml
<?xml version="1.0" encoding="ISO-8859-1" ?><!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.0//EN"
          "http://struts.apache.org/dtds/struts-config_1_0.dtd"><struts-config>
</struts-config>
BookView.jsp:
<%@ page language="java" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean"%>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html"%>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic"%>
<html:html locale="true">
<head>
<html:base/>
<title>
<bean:message key="index.title"/>
</title>
</head>
<body>
<h2>BookView</h2>
</body>
</html:html>错误:提示org.apache.jasper.JasperException: /BookView.jsp(4,0) Unable to load class html,请问各位这是什么原因啊?在线等.