when i run Java Web in tomcat6.0. i found this problem in time !\[code\]org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'CaseCache' defined in file [D:\eclipse\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp3\wtpwebapps\tpcPo\WEB-INF\classes\applicationContextCache.xml]: Cannot resolve reference to bean 'CaseDAO' while setting bean property 'caseDAO'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'CaseDAO' defined in file [D:\eclipse\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp3\wtpwebapps\tpcPo\WEB-INF\classes\applicationContextDao.xml]: Instantiation of bean failed; nested exception is java.lang.ExceptionInInitializerErrorat org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:275)at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:104)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1245)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1010)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:472)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)at java.security.AccessController.doPrivileged(Native Method)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429)at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:728)at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:380)at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:255)at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:199)at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45)at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4206)at org.apache.catalina.core.StandardContext.start(StandardContext.java:4705)at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)at org.apache.catalina.core.StandardService.start(StandardService.java:525)at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)at org.apache.catalina.startup.Catalina.start(Catalina.java:595)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)at java.lang.reflect.Method.invoke(Unknown Source)at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'CaseDAO' defined in file [D:\eclipse\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp3\wtpwebapps\tpcPo\WEB-INF\classes\applicationContextDao.xml]: Instantiation of bean failed; nested exception is java.lang.ExceptionInInitializerErrorat org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:883)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:839)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:440)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)at java.security.AccessController.doPrivileged(Native Method)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:269)... 33 moreCaused by: java.lang.ExceptionInInitializerErrorat sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)at java.lang.reflect.Constructor.newInstance(Unknown Source)at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:100)at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:61)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:877)... 44 more\[/code\]My applicationContextCache.xml\[code\]<bean id="CaseCache" class="com.aboveE.tpcPo.service.CacheService"> <property name="caseDAO" ref="CaseDAO"/> <property name="offDocDAO" ref="OffDocDAO"/> <property name="caseQueryMap" ref="caseQueryCache" /> <property name="officialQueryMap" ref="officialQueryCache" /></bean>\[/code\]My applicationContextDao.xml\[code\]<bean id="CaseDAO" class="com.aboveE.tpcPo.dao.CaseDAO"> <property name="sessionFactory"> <ref bean="sessionFactory" /> </property></bean>\[/code\]I'have already done a lot of research in google , but I can't resolve my problem...please somebody can help me 