学步园

web.xml

<filter>  
       <filter-name>OpenSessionInViewFilter</filter-name>  
       <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>  
   </filter>  
      
   <filter-mapping>  
       <filter-name>OpenSessionInViewFilter</filter-name>  
       <url-pattern>/*</url-pattern>  
   </filter-mapping>  
      
   <listener>  
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
</listener>

struts-config.xml

<plug-in  
className="org.springframework.web.struts.ContextLoaderPlugIn">  
<set-property property="contextConfigLocation"  
value="/WEB-INF/applicationContext.xml"/>  
</plug-in>

此处的org.springframework.web.struts.ContextLoaderPlugIn类里的方法initWebApplicationContext()，在
getServletContext().setAttribute(attrName, wac);下增加一条属性设置。
  getServletContext().setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, wac);

具体原因参考http://www.javaeye.com/topic/15057，里面有很详细的说明