拦截器加载错误Actual exception

错误信息：

警告: Unable to load config class EmployeeLoginCheckInterceptor at interceptor - file:/D:/project/ws2013/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/rkwbs1/WEB-INF/classes/swpu_rkw.xml:13:90 probably due to a missing jar, which might be fine if you never plan to use the employeeLoginCheck interceptor
2014-5-22 19:38:20 com.opensymphony.xwork2.util.logging.commons.CommonsLogger error
严重: Actual exception
Caught Exception while registering Interceptor class EmployeeLoginCheckInterceptor - interceptor - file:/D:/project/ws2013/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/rkwbs1/WEB-INF/classes/swpu_rkw.xml:13:90
at com.opensymphony.xwork2.ObjectFactory.buildInterceptor(ObjectFactory.java:214)
at com.opensymphony.xwork2.config.providers.InterceptorBuilder.constructInterceptorReference(InterceptorBuilder.java:70)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.lookupInterceptorReference(XmlConfigurationProvider.java:1101)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadInterceptorStack(XmlConfigurationProvider.java:918)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadInterceptorStacks(XmlConfigurationProvider.java:931)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadInterceptors(XmlConfigurationProvider.java:954)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:522)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:290)
at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:112)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:239)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:67)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:429)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:471)
at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:74)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51)
at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:281)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:262)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:107)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4775)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5452)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: EmployeeLoginCheckInterceptor
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
at com.opensymphony.xwork2.util.ClassLoaderUtil.loadClass(ClassLoaderUtil.java:152)
at com.opensymphony.xwork2.ObjectFactory.getClassInstance(ObjectFactory.java:108)
at com.opensymphony.xwork2.spring.SpringObjectFactory.getClassInstance(SpringObjectFactory.java:233)
at com.opensymphony.xwork2.spring.SpringObjectFactory.buildBean(SpringObjectFactory.java:153)
at com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:151)
at com.opensymphony.xwork2.ObjectFactory.buildInterceptor(ObjectFactory.java:192)
... 27 more
web.xml中的配置：

  <!-- 配置Spring ApplicationContext自动载入监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener> 
   <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

struts.xml文件的配置：

  <package  name="base" namespace="/" extends="json-default">
 <interceptors>
            <interceptor name="employeeLoginCheck" class="EmployeeLoginCheckInterceptor"></interceptor>
          <!-- 拦截器栈配置 -->
            <interceptor-stack name="CheckStack">
               <interceptor-ref name="defaultStack"/>
              <interceptor-ref name="employeeLoginCheck"></interceptor-ref>
            </interceptor-stack>
           
       </interceptors>
       <!-- 默认拦截器配置 -->
<default-interceptor-ref name="CheckStack"/>
<!-- 全局结果-->
<global-results>
          <result name="login" type="redirect">/login.jsp</result>
        </global-results>  
</package>

解决方法：路径问题，应该是完整路径：

<!-- 拦截器配置 -->
   <package  name="base" namespace="/" extends="json-default">
 <interceptors>
            <interceptor name="employeeLoginCheck" class="com.swpu.rkwbs1.admin.action.EmployeeLoginCheckInterceptor"></interceptor>
          <!-- 拦截器栈配置 -->
            <interceptor-stack name="CheckStack">
               <interceptor-ref name="defaultStack"/>
              <interceptor-ref name="employeeLoginCheck"></interceptor-ref>
            </interceptor-stack>
           
       </interceptors>
       <!-- 默认拦截器配置 -->
<default-interceptor-ref name="CheckStack"/>
<!-- 全局结果-->
<global-results>
          <result name="login" type="redirect">/login.jsp</result>
        </global-results>  
</package>