c3p0的jar包已經(jīng)加載正常，為何還報(bào)錯(cuò)說(shuō)找不到com.mchange.v2.c3p0.ComboPooledDataSource
c3p0的jar包已經(jīng)加載正常，為何還報(bào)錯(cuò)說(shuō)找不到com.mchange.v2.c3p0.ComboPooledDataSource
而且在類中import時(shí)時(shí)可以找到這個(gè)類的。但是在spring+Hibernate配置數(shù)據(jù)源的時(shí)候，啟動(dòng)Tomcat就報(bào)錯(cuò)?。。?！
?
急急急急急急！?。。。?/p>
錯(cuò)誤信息如下：
org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [com.mchange.v2.c3p0.ComboPooledDataSource] for bean with name 'datasource' defined in class path resource [applicationContext.xml]; nested exception is java.lang.ClassNotFoundException: com.mchange.v2.c3p0.ComboPooledDataSource
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1327)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:594)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1396)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:959)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:683)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5099)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5615)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
at org.apache.catalina.startup.HostConfig.reload(HostConfig.java:1548)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1512)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1748)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:333)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1370)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1542)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1552)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1520)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ClassNotFoundException: com.mchange.v2.c3p0.ComboPooledDataSource
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1891)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1734)
at org.springframework.util.ClassUtils.forName(ClassUtils.java:247)
at org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.java:395)
at org.springframework.beans.factory.support.AbstractBeanFactory.doResolveBeanClass(AbstractBeanFactory.java:1348)
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1319)
... 23 more
2017-2-8 16:18:09 org.apache.catalina.core.StandardContext listenerStart
嚴(yán)重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [com.mchange.v2.c3p0.ComboPooledDataSource] for bean with name 'datasource' defined in class path resource [applicationContext.xml]; nested exception is java.lang.ClassNotFoundException: com.mchange.v2.c3p0.ComboPooledDataSource
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1327)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:594)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1396)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:959)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:683)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5099)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5615)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
at org.apache.catalina.startup.HostConfig.reload(HostConfig.java:1548)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1512)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1748)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:333)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1370)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1542)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1552)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1520)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ClassNotFoundException: com.mchange.v2.c3p0.ComboPooledDataSource
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1891)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1734)
at org.springframework.util.ClassUtils.forName(ClassUtils.java:247)
at org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.java:395)
at org.springframework.beans.factory.support.AbstractBeanFactory.doResolveBeanClass(AbstractBeanFactory.java:1348)
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1319)
... 23 more
2019-12-12
升級(jí)mybatis-spring版本號(hào)1.2.4，問(wèn)題得到解決
2018-04-14
重新name 的名字， 再打前三個(gè)字母，使用Alt+/的方式提示選入即可 ?，不行再加0.9.2.1的jar ?包
2017-07-08
我也出現(xiàn)這樣的問(wèn)題，包什么的都導(dǎo)入了，已啟動(dòng)tomcat后就報(bào)錯(cuò)Caused by: java.lang.ClassNotFoundException: com.mchange.v2.c3p0.ComboPooledDataSourc
2017-04-23
因?yàn)閟pring在3.1之后的版本中把 AnnotationSessionFactoryBean與LocalSessionFactoryBean集成到了一起，統(tǒng)一用org\springframework\orm\hibernate4\LocalSessionFactoryBean。?不再有AnnotationSessionFactoryBean類；?但是org.springframework.orm-3.1.1.RELEASE.jar 依然保留有org\springframework\orm\hibernate3這個(gè)包，這是為了向下兼容。所以改成hibernate4即可！
2017-04-10
我解決了：
Caused by: java.lang.ClassNotFoundException: com.mchange.v2.c3p0.ComboPooledDataSourc的解決問(wèn)題
解決方法：1.導(dǎo)入c3p0-0.9.2.1.jar和mchange-commons-java-0.2.3.4.jar（有的導(dǎo)入就解決，有的還會(huì)報(bào)錯(cuò)，報(bào)錯(cuò)的看第二步）
2.對(duì)于<!-- 配置連接池 -->
?? ?<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"><bean>中的class不能直接復(fù)制粘貼，要通過(guò)“提示”敲出來(lái)，如果直接復(fù)制或者不按提示敲出來(lái)可能還會(huì)繼續(xù)報(bào)同樣的錯(cuò)誤
2017-04-10
樓主怎么解決的，分享一下
2017-04-08
樓主最后是怎么解決的？
2017-02-27
和樓主 情況一樣，我的解決辦法是oracle的驅(qū)動(dòng)jar包和數(shù)據(jù)庫(kù)版本相同，db.properties文件中加載的驅(qū)動(dòng)類為oracle.jdbc.OracleDriver，這是11g版本的，不行再換oracle.jdbc.driver.OracleDriver試試。
2017-02-08
很奇怪，我把c3p0的.jar包放在lib下面就行了，但是放在我自己創(chuàng)建的包就不行。。
表示很奇怪。。。。