struts2 配置文件 Unable to find parent packages

[csjxing]

以下是我的struts2的配置文件:
struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
<package name="common" extends="struts-default"></package>

<package name="default" extends="common"></package>

<package name="admin" extends="common" namespace="/admin"></package>

<include file="struts-default.xml"/>

</struts>


struts-default.xnl

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
<package name="ext.defalut" namespace="/" extends="default"></package>
</struts>


请问以上配置有问题吗?为什么启动服务器的时候老是提示
Unable to find parent packages default