[求助]请问这个错误怎么回事?

[W3286879]

就是我为Spring框架中写了一个测试类..
可是它报错误
错误如下:
Exception in thread "main" 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
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.createBeanInsta

nce(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.preInstantiateSingleton

s(DefaultListableBeanFactory.java:287)
at org.springframework.context.support.AbstractApplicationContext.refresh

(AbstractApplicationContext.java:352)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>

(ClassPathXmlApplicationContext.java:91)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>

(ClassPathXmlApplicationContext.java:75)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>

(ClassPathXmlApplicationContext.java:65)
at com.acegi.Test.main(Test.java:8)

测试类代码如下:
public class Test {

/**
* @param args
*/
public static void main(String[] args) {
ClassPathXmlApplicationContext ctx=new ClassPathXmlApplicationContext("/applicationContext.xml");
ctx.getBean("dataSource");
}
}


applicationContext.zml中代码如下:

<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName">
<value>com.mysql.jdbc.Driver</value>
</property>
<property name="url">
<value>jdbc:jtds:sqlserver://localhost:1433/pubs</value>
</property>
<property name="username">
<value>sa</value>
</property>
<property name="password">
<value>123</value>
</property>
<property name="defaultAutoCommit">
<value>true</value>
</property>
</bean>

[usherlight]

请在类路径中加入commons-pool.jar

[W3286879]

那个...我找不到额...在哪 可以告诉我下么 在JDK下?