spring问题求助org.springframework.beans.factory.CannotLoadBeanClassException:

严重: Context initialization failed 
org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [com.test.db.BeanFactoryPost] for bean with name 'com.test.db.BeanFactoryPost' defined in ServletContext resource [/WEB-INF/contextConfig.xml]; nested exception is java.lang.ClassNotFoundException: com.test.db.BeanFactoryPost 
Caused by: java.lang.ClassNotFoundException: com.test.db.BeanFactoryPost 
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1340) 
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1189) 
at org.springframework.util.ClassUtils.forName(ClassUtils.java:177) 
at org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.java:313) 
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:912) 
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:165) 
at org.springframework.context.support.AbstractApplicationContext.getBeanNamesForType(AbstractApplicationContext.java:687) 
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:397) 
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:330) 
at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.refresh(AbstractRefreshableWebApplicationContext.java:156) 
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:246) 
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:184) 
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:49) 
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3827) 
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4343) 
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:823) 
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807) 
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:595) 
at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDeployer.java:277) 
at org.apache.catalina.core.StandardHost.install(StandardHost.java:832) 
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:701) 
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:432) 
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:983) 
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:349) 
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) 
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1091) 
at org.apache.catalina.core.StandardHost.start(StandardHost.java:789) 
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1083) 
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:478) 
at org.apache.catalina.core.StandardService.start(StandardService.java:480) 
at org.apache.catalina.core.StandardServer.start(StandardServer.java:2313) 
at org.apache.catalina.startup.Catalina.start(Catalina.java:556) 
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
at java.lang.reflect.Method.invoke(Method.java:324) 
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:287) 
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425) 
2009-3-30 15:37:36 org.apache.catalina.core.StandardContext start 
严重: Error listenerStart 
2009-3-30 15:37:36 org.apache.catalina.core.StandardContext start 
严重: Context startup failed due to previous errors 
2009-3-30 15:37:36 org.apache.coyote.http11.Http11Protocol start 
contextConfig.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:aop="http://www.springframework.org/schema/aop" 
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 
      http://www.springframework.org/schema/aop 
      http://www.springframework.org/schema/aop/spring-aop-2.0.xsd"> <!-- common --> <bean class="com.test.db.BeanFactoryPost" /> 
</beans> jdk是ibm1.4