大神们看看

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd"><struts>    <constant name="struts.enable.DynamicMethodInvocation" value="false" />
    <constant name="struts.devMode" value="true" />    <package name="default" namespace="/" extends="struts-default">        <default-action-ref name="index" />        <global-results>
            <result name="error">/error.jsp</result>
        </global-results>        <global-exception-mappings>
            <exception-mapping exception="java.lang.Exception" result="error"/>
        </global-exception-mappings>        <action name="index">
            <result type="redirectAction">
                <param name="actionName">HelloWorld</param>
                <param name="namespace">/example</param>
            </result>
        </action>
    </package>    <include file="example.xml"/>    <!-- Add packages here --></struts>
这两行的错误
 <resul <include file="example.xml"/>
<include file="example.xml"/>
到底什么原因啊？