struts2+sitemesh 装饰器action路径问题···

Question

定义了三个装饰器模板stu_Decorator.jsp，  tec_Decorator.jsp，   admin_Decorator.jsp。有三个action之后的页面分别被装饰 student.jsp,  teacher.jsp,  admin.jsp. 但是无论action到哪个页面都被admin_Decorator.jsp 装饰。下面是decorator.xml代码：<?xml version="1.0" encoding="UTF-8"?>
<decorators defaultdir="/decorators">
    <excludes>
         <pattern>/index.jsp</pattern>  
    </excludes>
  
<decorator name="stu_Decorator" page="stu_Decorator.jsp">
 <pattern>/student/*</pattern>  
                  <pattern>/*.action</pattern>             
 </decorator> 
                  
            <decorator name="tec_Decorator" page="tec_Decorator.jsp">
 <pattern>/teacher/*</pattern> 
                  <pattern>/*.action</pattern> 
            </decorator>
            
               
         
               <decorator name="admin_Decorator" page="admin_Decorator.jsp">
     <pattern>/admin/*</pattern>  
                     <pattern>/*.action</pattern> 
               </decorator>
       
</decorators>······················
怎样让action后的页面被各自的装饰器正确装饰？？？
即stu_Decorator.jsp装饰student.jsp
  tec_Decorator.jsp 装饰 teacher.jsp
  admin_Decorator.jsp 装饰 admin.jsp小弟·······谢谢各位大侠