配置OpenSessionInView的教程

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-propertyproperty="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