openview失效

我原来用struts/spring/hibernate的时候同样使用OpenSessionInView,但是似乎没有robbin所说的问题啊。而且我在使用的时候,是ContextLoaderListener和ContextLoaderPlugIn一起用的。整个配置如下: 1.首先是web.xml Java代码 1.<filter> 2. <filter-name>OpenSessionInViewFilter</filter-name> 3. <filter-class>org.springframework.orm.hibernate.support.OpenSessionInViewFilter</filter-class> 4. </filter> 5. 6. <filter-mapping> 7. <filter-name>OpenSessionInViewFilter</filter-name> 8. <url-pattern>/*</url-pattern> 9. </filter-mapping> 10. 11. <listener> 12. <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 13.</listener> 14. 15...... <filter><filter-name>OpenSessionInViewFilter</filter-name><filter-class>org.springframework.orm.hibernate.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> ...... 2. 然后是struts-config.xml: Java代码 1.<plug-in classname="org.springframework.web.struts.ContextLoaderPlugIn"> 2. <set-property property="contextConfigLocation" value="/WEB-INF/action-servlet.xml"></set-property> 5.</plug-in><plug-in classname="org.springframework.web.struts.ContextLoaderPlugIn"><set-property property="contextConfigLocation" value="/WEB-INF/action-servlet.xml"></set-property></plug-in> 其余部分省略。 在上述配置下,使用OpenSessionInView似乎没有问题。 不知道robbin所说的ContextLoaderListener和ContextLoaderPlugIn不应该同时使用是不是做得是如下的配置:(struts-config.xml) Java代码 1.<plug-in> 3.<set-property property="contextConfigLocation"></set-property> 6.</plug-in><plug-in classname="org.springframework.web.struts.ContextLoaderPlugIn"><set-property property="contextConfigLocation" value="/WEB-INF/applicationContext.xml, /WEB-INF/action-servlet.xml"></set-property></plug-in> 我尝试了一下,用这种配置时,OpenSessionInView的确失效了。 我猜想,原因大概是这样:struts的这个plugIn,可能只是为了整合一个action-servlet.xml,将action-servlet.xml中的定义当作Spring的bean来使用,因此,在保存时,只要有action-servlet.xml的配置,就被保存到robbin所提到的那个attrName中,而不是WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE中,所以,OpenSessionInView是取不到这个配置的。 那么这个配置什么时候被取到呢?直觉告诉我,可能是和Action的Proxy有关。于是,查看了org.springframework.web.struts.DelegatingActionProxy的源码,果然: Java代码 1./** 2. * Return the delegate Action for the given mapping. 3. *

The default implementation determines a bean name from the 4. * given ActionMapping and looks up the corresponding bean in the 5. * WebApplicationContext. 6. * @param mapping the Struts ActionMapping 7. * @return the delegate Action 8. * @throws BeansException if thrown by WebApplicationContext methods 9. * @see #determineActionBeanName 10. */ 11. protected Action getDelegateAction(ActionMapping mapping); throws BeansException { 12. WebApplicationContext wac = getWebApplicationContext(getServlet();, mapping.getModuleConfig(););; 13. String beanName = determineActionBeanName(mapping);; 14. return (Action); wac.getBean(beanName, Action.class);; 15. } 16. 17. /** 18. * Fetch ContextLoaderPlugIn's WebApplicationContext from the 19. * ServletContext, containing the Struts Action beans to delegate to. 20. * @param actionServlet the associated ActionServlet 21. * @param moduleConfig the associated ModuleConfig 22. * @return the WebApplicationContext 23. * @throws IllegalStateException if no WebApplicationContext could be found 24. * @see DelegatingActionUtils#getRequiredWebApplicationContext 25. * @see ContextLoaderPlugIn#SERVLET_CONTEXT_PREFIX 26. */ 27. protected WebApplicationContext getWebApplicationContext( 28. ActionServlet actionServlet, ModuleConfig moduleConfig); throws IllegalStateException { 29. return DelegatingActionUtils.getRequiredWebApplicationContext(actionServlet, moduleConfig);; 30. } /** * Return the delegate Action for the given mapping. *

The default implementation determines a bean name from the * given ActionMapping and looks up the corresponding bean in the * WebApplicationContext. * @param mapping the Struts ActionMapping * @return the delegate Action * @throws BeansException if thrown by WebApplicationContext methods * @see #determineActionBeanName */ protected Action getDelegateAction(ActionMapping mapping); throws BeansException { WebApplicationContext wac = getWebApplicationContext(getServlet();, mapping.getModuleConfig(););; String beanName = determineActionBeanName(mapping);; return (Action); wac.getBean(beanName, Action.class);; } /** * Fetch ContextLoaderPlugIn's WebApplicationContext from the * ServletContext, containing the Struts Action beans to delegate to. * @param actionServlet the associated ActionServlet * @param moduleConfig the associated ModuleConfig * @return the WebApplicationContext * @throws IllegalStateException if no WebApplicationContext could be found * @see DelegatingActionUtils#getRequiredWebApplicationContext * @see ContextLoaderPlugIn#SERVLET_CONTEXT_PREFIX */ protected WebApplicationContext getWebApplicationContext( ActionServlet actionServlet, ModuleConfig moduleConfig); throws IllegalStateException { return DelegatingActionUtils.getRequiredWebApplicationContext(actionServlet, moduleConfig);; } 仔细看其中的取wac的代码,它并不是从WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE取的wac。 由此,我相信,除了robbin讲的修改源码以外,同时使用ContextLoaderListener和ContextLoaderPlugIn,但是不要在ContextLoaderPlugIn里面加入applicationContext.xml,只要加入你的action-servlet.xml,我相信,同样也可以非常流畅的使用OpenSessionInView

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