Caused by: java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in file [D:\HS_Test\WebRoot\WEB-INF\applicationContext.xml]: Instantiation of bean failed; nested exception is java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool

Caused by: java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool

at java.lang.Class.getDeclaredConstructors0(Native Method)

at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)

at java.lang.Class.getConstructor0(Unknown Source)

at java.lang.Class.getDeclaredConstructor(Unknown Source)

at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java: 54 )

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java: 759 )

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java: 724 )

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java: 387 )

at org.springframework.beans.factory.support.AbstractBeanFactory$ 1 .getObject(AbstractBeanFactory.java: 251 )

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java: 156 )

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java: 248 )

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java: 160 )

at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java: 287 )

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java: 352 )

at org.springframework.context.support.FileSystemXmlApplicationContext. < init > (FileSystemXmlApplicationContext.java: 93 )

at org.springframework.context.support.FileSystemXmlApplicationContext. < init > (FileSystemXmlApplicationContext.java: 77 )

at org.springframework.context.support.FileSystemXmlApplicationContext. < init > (FileSystemXmlApplicationContext.java: 67 )

原因是工具myEclipse在建立SessionFactory的時候，少加一個包 commons-pool-1.3.jar 補上去問題解決。