tomcat启动时报Caused by: java.lang.ClassNotFoundException: com.opensymphony.xwork2.ActionSupport

报错信息：

严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener

org.springframework.beans.factory.CannotLoadBeanClassException: Error loading class [cn.edu.hzu.cas.web.DepartmentAction] for bean with name 'departmentAction' defined in file [D:\Tool\tomcat\tomcat-6.0.29\webapps\cas\WEB-INF\classes\applicationContext-service.xml]:
problem with class file or dependent class; nested exception is java.lang.NoClassDefFoundError: com/opensymphony/xwork2/ActionSupport

at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1253)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:576)

at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1319)

at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:885)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:562)

at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)

at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)

at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)

at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)

at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4135)

at org.apache.catalina.core.StandardContext.start(StandardContext.java:4630)

at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)

at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)

at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)

at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:905)

at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:740)

at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:500)

at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)

at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)

at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)

at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)

at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)

at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)

at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)

at org.apache.catalina.core.StandardService.start(StandardService.java:519)

at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)

at org.apache.catalina.startup.Catalina.start(Catalina.java:581)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:597)

at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)

at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

Caused by: java.lang.NoClassDefFoundError: com/opensymphony/xwork2/ActionSupport

at java.lang.ClassLoader.defineClass1(Native Method)

at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)

at java.lang.ClassLoader.defineClass(ClassLoader.java:616)

at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)

at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2733)

at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1124)

at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1612)

at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491)

at org.springframework.util.ClassUtils.forName(ClassUtils.java:257)

at org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.java:408)

at org.springframework.beans.factory.support.AbstractBeanFactory.doResolveBeanClass(AbstractBeanFactory.java:1271)

at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1242)

... 33 more

Caused by: java.lang.ClassNotFoundException: com.opensymphony.xwork2.ActionSupport

at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1645)

at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491)

... 45 more

解决方法：

加入struts2-core-2.1.8.1.jar、 xwork-core-2.1.6.jar 两个jar包