Spring + Tomcat 启动报错java.lang.ClassNotFoundException: org.apache.commons.pool.impl.GenericObjectPool

错误如下：

-- ::,-[TS] INFO http-- org.springframework.beans.factory.support.DefaultListableBeanFactory - Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@b914b3: defining beans [dataSource,jdbcTemplate,xxtsService,wpushDao,httpUtil,cronService,clearDataJob,getNsrInfoJob,scheduler,quartzManager]; root of factory hierarchy
-- ::,-[TS] ERROR http-- org.springframework.web.context.ContextLoader - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scheduler' defined in ServletContext resource [/WEB-INF/spring-conf.xml]: Cannot resolve reference to bean 'dataSource' while setting bean property 'dataSource'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in ServletContext resource [/WEB-INF/spring-conf.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:)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:)
    at org.springframework.beans.factory.support.AbstractBeanFactory$.getObject(AbstractBeanFactory.java:)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:)
    at org.springframework.context.support.DefaultLifecycleProcessor.getLifecycleBeans(DefaultLifecycleProcessor.java:)
    at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:)
    at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:)
    at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:)
    at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:)
    at org.apache.catalina.manager.ManagerServlet.start(ManagerServlet.java:)
    at org.apache.catalina.manager.ManagerServlet.doGet(ManagerServlet.java:)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:)
    at java.lang.Thread.run(Thread.java:)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in ServletContext resource [/WEB-INF/spring-conf.xml]: Instantiation of bean failed; nested exception is java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:)
    at org.springframework.beans.factory.support.AbstractBeanFactory$.getObject(AbstractBeanFactory.java:)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:)
    ...  more
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool
    at java.lang.Class.getDeclaredConstructors0(Native Method)
    at java.lang.Class.privateGetDeclaredConstructors(Class.java:)
    at java.lang.Class.getConstructor0(Class.java:)
    at java.lang.Class.getDeclaredConstructor(Class.java:)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:)
    ...  more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.pool.impl.GenericObjectPool
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:)
    ...  more

注意：

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

我使用的是 org.apache.commons.pool-1.5.6.jar
将其替换为：commons-pool-1.6.jar 问题就解决了。
下载链接：http://commons.apache.org/proper/commons-pool/download_pool.cgi?Preferred=http%3A%2F%2Fapache.fayea.com%2Fapache-mirror%2F