SiteMesh和Struts2，Filter的配置顺序

      Sitemesh和Struts2结合时，要特别注意它们各自Filter的顺序，否则会导致双方都不能正常工作。而又由于Struts2在2.1.3之前使用的是FilterDispatcher，2.1.3之后推荐使用StrutsPrepareFilter和StrutsExecuteFilter替代FilterDispatcher，因此，配置上又会有所不同。
      2.1.3之前的版本，sitemesh的filter要介于StrutsPrepareFilter和FilterDispatcher之间，配置如下：

 <filter>
        <filter-name>struts-cleanupfilter-name>
        <filter-class>org.apache.struts2.dispatcher.ActionContextCleanUpfilter-class>
    filter>
    <filter-mapping>
        <filter-name>struts-cleanupfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

    <filter>
        <filter-name>sitemeshfilter-name>
        <filter-class>com.opensymphony.module.sitemesh.filter.PageFilterfilter-class>
    filter>
    <filter-mapping>
        <filter-name>sitemeshfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

    <filter>
        <filter-name>strutsfilter-name>
        <filter-class>org.apache.struts2.dispatcher.FilterDispatcherfilter-class>
    filter>
    <filter-mapping>
        <filter-name>strutsfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

       2.1.3之后的版本，sitemesh的filter要介于StrutsPrepareFilter和StrutsExecuteFilter之间，配置如下：

 <filter>
        <filter-name>struts-cleanupfilter-name>
        <filter-class>org.apache.struts2.dispatcher.ActionContextCleanUpfilter-class>
    filter>
 <filter-mapping>
        <filter-name>struts-cleanupfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>
    <filter>
        <filter-name>struts-preparefilter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareFilterfilter-class>
    filter>
 <filter-mapping>
        <filter-name>struts-preparefilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>
 <filter>
        <filter-name>sitemeshfilter-name>
        <filter-class>com.opensymphony.module.sitemesh.filter.PageFilterfilter-class>
    filter>
 <filter-mapping>
        <filter-name>sitemeshfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

    <filter>
        <filter-name>struts-executefilter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsExecuteFilterfilter-class>
    filter>
    <filter-mapping>
        <filter-name>struts-executefilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

转自：http://blog.csdn.net/bluishglc/article/details/5969769