Spring3.0.6MVC抛异常

异常如下:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'urlMapping' defined in ServletContext resource [/WEB-INF/spring-servlet.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [net.boco.controller.HelloWorldAction] for bean with name 'helloWorldAction' defined in ServletContext resource [/WEB-INF/spring-servlet.xml]; nested exception is java.lang.ClassNotFoundException: net.boco.controller.HelloWorldAction
Related cause: org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [net.boco.controller.HelloWorldAction] for bean with name 'helloWorldAction' defined in ServletContext resource [/WEB-INF/spring-servlet.xml]; nested exception is java.lang.ClassNotFoundException: net.boco.controller.HelloWorldAction

提示我说找不到HelloWorldAction,但是我这个类确认存在

我怀疑我的jar包少了,我的工程jar包如下:

commons-logging.jar
jaxen-1.1-beta-7.jar
jstl.jar
org.springframework.aop-3.0.5.RELEASE.jar
org.springframework.asm-3.0.5.RELEASE.jar
org.springframework.aspects-3.0.5.RELEASE.jar
org.springframework.beans-3.0.5.RELEASE.jar
org.springframework.context-3.0.5.RELEASE.jar
org.springframework.context.support-3.0.5.RE.jar
org.springframework.core-3.0.5.RELEASE.jar
org.springframework.expression-3.0.5.RELEASE.jar
org.springframework.instrument-3.0.5.RELEASE.jar
org.springframework.instrument.tomcat-3.0.5.jar
org.springframework.jdbc-3.0.5.RELEASE.jar
org.springframework.jms-3.0.5.RELEASE.jar
org.springframework.orm-3.0.5.RELEASE.jar
org.springframework.oxm-3.0.5.RELEASE.jar
org.springframework.test-3.0.5.RELEASE.jar
org.springframework.transaction-3.0.5.RELEAS.jar
org.springframework.web-3.0.5.RELEASE.jar
org.springframework.web.servlet-3.0.5.RELEAS.jar --------------------编程问答-------------------- web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
 http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>
--------------------编程问答-------------------- spring-servlet.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="helloWorld.do">helloWorldAction</prop>
</props>
</property>
</bean>
<bean id="viewResolver"  class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass">
<value>org.springframework.web.servlet.view.InternalResourceViewResolver</value>
</property>
</bean>
<bean id="helloWorldAction" class="net.boco.controller.HelloWorldAction">
<property name="helloWorld">
<value>HelloWorld</value>
</property>
<property name="viewPage">
<value>/WEB-INF/view/hello.jsp</value>
</property>
</bean>
</beans>
--------------------编程问答-------------------- net.boco.controller.HelloWorldAction

包路径不会写错了吧？或者HelloWorldAction 编译了吗？ --------------------编程问答-------------------- 路径肯定没问题

补充：Java ,  Java EE