大将帮我看看这是什么错误？

Question

log4j:WARN No appenders could be found for logger (org.springframework.context.support.ClassPathXmlApplicationContext).
log4j:WARN Please initialize the log4j system properly.
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.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.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.lxh.maobiggio.test.TestPersonDAO.main(TestPersonDAO.java:18)

Answer 1

创建'dataSource' 出错．是不是包导错了，或有冲突．

Answer 2

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) 
应该是楼主的包没有导进来，或是包的路径错误

Answer 3

java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool 
包没有找到

Answer 4

java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool 导包的问题

Answer 5

<?xml version="1.0" encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName"
value="org.gjt.mm.mysql.Driver">
</property>
<property name="url"
value="jdbc:mysql://localhost:3306/maozhenxing">
</property>
<property name="username" value="root"></property>
<property name="password" value="198522384"></property>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <property name="dataSource">
<ref bean="dataSource"></ref>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
org.hibernate.dialect.MySQLDialect
</prop>
</props>
</property>
<property name="mappingResources">
<list>
<value>com/lxh/maobiggio/vo/Person.hbm.xml</value></list>
</property>

</bean>
<bean id = "hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
<property name="sessionFactory">
  <ref bean="sessionFactory"/>
 </property>
</bean>
<bean id = "persondao" class="com.lxh.maobiggio.dao.PersonDAO" abstract="true"></bean>
<bean id = "persondaoimpl" class="com.lxh.maobiggio.impl.PersonDAOImpl" parent="persondao"></bean>
</beans>
是不是提示我这里包里出了问题 但是我下了一个commons-dbcp.jar文件导进去还是出一样的问题

Answer 6

我感觉是你的包有冲突啊，我以前也是出现这样的问题啊,后来我在myeclipse里面自动生成的包啊，只要删除某个jar文件就可以直接用啊 

Answer 7

我那也是MYeclipse自动生成的包 现在那么多包 真不知道该删除哪一个了

Answer 8

创建'dataSource' 出错．是不是包导错了，或有冲突．