为什么监听器都配置了还是出现找不到这个类的异常啊

<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
 <display-name>Archetype Created Web Application</display-name>
 <context-param>
   <param-name>contextConfigLocation</param-name>
   <param-value>classpath*:com/imooc/bookms/common/global/spring.xml</param-value>
 </context-param>
 <context-param>
   <param-name>log4jConfigLocation</param-name>
   <param-value>log4j.properties</param-value>
 </context-param>
 <!--编码过滤器-->
 <!--声明编码过滤器-->
 <filter>
   <filter-name>Encoding</filter-name>
   <filter-class>com.imooc.bookms.common.global.EncodingFilter</filter-class>
   <init-param>
     <param-name>Encoding</param-name>
     <param-value>UTF-8</param-value>
   </init-param>
 </filter>
 <!--编码过滤器映射路径-->
 <filter-mapping>
   <filter-name>Encoding</filter-name>
   <url-pattern>/*</url-pattern>
 </filter-mapping>
 <!--配置监听器读取spring.xml的配置-->
 <listener>
   <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
 </listener>
 <!--开启log4j监听-->
 <listener>
   <listener-class>org.springframework.web.context.support.XmlWebApplicationContext</listener-class>
 </listener>


</web-app>

开启了监听器而且在接口中也定义了@service("bookService") 为什么还是会有这个异常啊org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'bookService' is defined