spring配置问题

我的StudentAction中通过spring注入sImpl,tomcat启动报创建StudentAction Bean实例错误: org.springframework.beans.InvalidPropertyException: Invalid property 'sImpl' of bean class [action.StudentAction]: No property 'sImpl' found代码如下:

web.xml:

<?xml version="1.0" encoding="iso-8859-1"?>

<web-app xmlns="http://java.sun.com/xml/ns/j2ee" 

     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.4" 

     xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee

http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

<display-name>Struts Examples Application</display-name>

  <context-param>

     <param-name>contextConfigLocation</param-name>

     <param-value>/WEB-INF/applicationContext.xml</param-value>

  </context-param>

  <servlet>

    <servlet-name>action</servlet-name>

    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>

    <init-param>

      <param-name>config</param-name>

      <param-value>

          /WEB-INF/struts-config.xml

      </param-value>

    </init-param>

   </servlet>

  <servlet-mapping>

    <servlet-name>action</servlet-name>

    <url-pattern>*.do</url-pattern>

  </servlet-mapping>

  <filter>

     <filter-name>characterEncoding</filter-name>

     <filter-class>filter.CharacterEncodingFilter</filter-class>

  </filter>

  <filter-mapping>

    <filter-name>characterEncoding</filter-name>

    <url-pattern>/*</url-pattern>

  </filter-mapping>

  <!-- The Usual Welcome File List -->

  <welcome-file-list>

    <welcome-file>index.jsp</welcome-file>

  </welcome-file-list>

 </web-app>

struts-config.xml:

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts-config PUBLIC

          "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"

          "http://struts.apache.org/dtds/struts-config_1_3.dtd">

<struts-config>

&lt;form-beans&gt;
    &lt;form-bean name="studentcourse" type="action.StudentCourseForm" /&gt;
&lt;/form-beans&gt;
&lt;action-mappings&gt;
    &lt;action path="/aa"&gt;
        &lt;forward name="success" path="/nihao.jsp"&gt;&lt;/forward&gt;
    &lt;/action&gt;
    &lt;action path="/add" name="studentcourse"&gt;
        &lt;forward name="success" path="/add.jsp"&gt;&lt;/forward&gt;
    &lt;/action&gt;
&lt;/action-mappings&gt;
&lt;controller 
processorClass="org.springframework.web.struts.DelegatingRequestProcessor"/&gt;
&lt;plug-in
    className="org.springframework.web.struts.ContextLoaderPlugIn"&gt;
    &lt;set-property property="contextConfigLocation"
        value="/WEB-INF/applicationContext.xml" /&gt;
&lt;/plug-in&gt;


</struts-config>

applicationContext.xml:

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

        xmlns:tx="http://www.springframework.org/schema/tx"

        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd">

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"> 

   <property name="driverClass" value="oracle.jdbc.driver.OracleDriver"/>

   <property name="jdbcUrl" value="jdbc:oracle:thin:@localhost:1521:test"/>

   <property name="user" value="scott"/>

   <property name="password" value="zhoubl"/>

</bean>

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

   <property name="dataSource" ref="dataSource"></property>

   <property name="hibernateProperties">

      <props>

         <prop key="hibernate.dialect">org.hibernate.dialect.Oracle9Dialect</prop>

         <prop key="show_sql">true</prop>

      </props>

   </property>

   <property name="mappingResources">

      <list>

        <value>com/zhou/Student.hbm.xml</value>

        <value>com/zhou/Course.hbm.xml</value>

      </list>

   </property>

</bean>

<bean id="cImpl" class="daoImpl.ICourseImpl">

  <property name="hibernateTemplate" ref="hibernateTemplate"></property>

</bean>


<bean id="sImpl" class="daoImpl.IStudentImpl">

  <property name="hibernateTemplate" ref="hibernateTemplate"></property>

</bean>

<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">

    <property name="sessionFactory" ref="sessionFactory" />

</bean>


<!--struts配置-->


<bean name="/aa" class="action.HelloAction"></bean>


<bean name="/add" class="action.StudentAction">

  <property name="sImpl" ref="sImpl"></property>

  <property name="cImpl" ref="cImpl"></property>

</bean>


</beans>