struts-2.0.14配置的问题

我在Web.xml中配置了好了struts2.0,(没有用spring)
然后启动tomcat,他说要配置spring 监听器,什么原因啊:
严重: ********** FATAL ERROR STARTING UP STRUTS-SPRING INTEGRATION **********
Looks like the Spring listener was not configured for your web app!
Nothing will work until WebApplicationContextUtils returns a valid ApplicationContext.
You might need to add the following to web.xml:

org.springframework.web.context.ContextLoaderListener

2008-12-24 9:53:12 org.apache.catalina.core.StandardContext filterStart
严重: Exception starting filter struts2
java.lang.NullPointerException

你是不是加了struts2-spring-plugin这个jar包了?这是struts2和spring整合的插件,会自动加载里面的配置。