sitemesh装饰页面

步骤：

1，引入sitemesh的jar包

2，引入struts2对sitemesh的支持包：struts2-sitemesh-plugin-x.x.x.jar

3，修改web.xml文件，添加ActionContextCleanup和sitemesh过滤器

<filter>
	<filter-name>struts-cleanup</filter-name>
	<filter-class>org.apache.struts2.dispatcher.ActionContextCleanUp</filter-class>
</filter>
<filter>
	<filter-name>sitemesh</filter-name>
	<filter-class>org.apache.struts2.sitemesh.FreeMarkerPageFilter</filter-class>
</filter>


<filter-mapping>
	<filter-name>struts-cleanup</filter-name>
	<url-pattern>/*</url-pattern>
</filter-mapping>
	
<filter-mapping>
	<filter-name>sitemesh</filter-name>
	<url-pattern>/*</url-pattern>
</filter-mapping>

4，提供decorators.xml配置文件，在这个配置文件中定义装饰器的路径，需要放到WEB-INF目录下

5，创建装饰器

6，使用装饰器

      -->在头部添加一条语句：<meta name="decorator" content="navigation">