Have tried simple spring hibernate integration. datasource cannot be instantiated because of unknown reason. Below is error while running application.

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'd' defined in class path resource [applicationContext.xml]: Cannot resolve reference to bean 'template' while setting bean property 'template'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'template' defined in class path resource [applicationContext.xml]: Cannot resolve reference to bean 'mysessionFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mysessionFactory' defined in class path resource [applicationContext.xml]: Cannot resolve reference to bean 'dataSource' while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [applicationContext.xml]: Instantiation of bean failed; nested exception is java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:328)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:106)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1317)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1076)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at com.javatpoint.InsertTest.main(InsertTest.java:12)





Content of application context.xml is

<?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:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">


<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="org.postgresql.Driver"></property>
<property name="url" value="jdbc:postgresql://localhost:5432/hibernatetutorial"></property>
<property name="username" value=""></property>
<property name="password" value=""></property>
</bean>

<bean id="mysessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<constructor-arg ref="dataSource"/>
<property name="mappingResources">
<list>
<value>Employee.hbm.xml</value>
</list>
</property>

<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.show_sql">true</prop>

</props>
</property>
</bean>

<bean id="template" class="org.springframework.orm.hibernate3.HibernateTemplate">
<constructor-arg ref="mysessionFactory"/>
</bean>

<bean id="d" class="com.javatpoint.EmployeeDAO">
<property name="template" ref="template"></property>
</bean>

</beans>


Could anyone please help me in identifying error??

"nested exception is java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool"

=> http://commons.apache.org/proper/commons-pool/