请大家帮我看一下怎么解决这个问题

[rexue88]

严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [com.dao.BaseDao] for bean with name 'ibatisDao' defined in ServletContext resource [/WEB-INF/applicationContext.xml]; nested exception is java.lang.ClassNotFoundException: com.dao.BaseDao

Caused by: java.lang.ClassNotFoundException: com.dao.BaseDao
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1645)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491)
at org.springframework.util.ClassUtils.forName(ClassUtils.java:258)
at org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.java:408)
at org.springframework.beans.factory.support.AbstractBeanFactory.doResolveBeanClass(AbstractBeanFactory.java:1244)
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1215)
... 24 more



spring配置文件中的代码是：
<bean id="ibatisDao" class="com.dao.BaseDao">
<property name="dataSource" ref="ds-ibatis" /><!-- 已经配好的数据源对象 -->
<property name="sqlMapClient" ref="sqlMapClient" /><!-- 已经配好的sqlMapClient对象 -->
</bean>

说明：配置文件走到这个地方时，老是报找不到BaseDao这个类，但是这个类我检查过Ok啊，再普通不过的一个类。
求解