struts2的struts.xml配置问题

如果缺少

<package name="strtuts2" extends="struts-default">


</package>


only:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>

<action name="upload" class="bmp.zhengchneng.Upload">
<result name="success">/index.jsp </result>
<interceptor-ref name="fileUpload"></interceptor-ref>
<interceptor-ref name="defaultStack"></interceptor-ref>


</action>

</struts>


就会报此错。

The content of element type "struts" must match "((package|include|bean|constant)*,unknown-handler-stack?)". at (null:13:10)
struts2的struts.xml配置问题