我在集成Struts2和Spring的时候 ,web.xml中配置<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
为什么Action继承ActionSupport,getWebApplicationcontext()为空啊?