这是什么原因Could not load JDBC driver class [com.mysql.jdbc.Driver]

[客官酒来了]

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in file [C:\tomact\apache-tomcat-7.0.54\webapps\demo\WEB-INF\classes\ApplicationContext-common.xml]: Error setting property values; nested exception is org.springframework.beans.PropertyBatchUpdateException; nested PropertyAccessExceptions (1) are:
PropertyAccessException 1: org.springframework.beans.MethodInvocationException: Property 'driverClassName' threw exception; nested exception is java.lang.IllegalStateException: Could not load JDBC driver class [com.mysql.jdbc.Driver]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1361)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1086)
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.DefaultSin
gletonBeanRegistry.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 org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:322)
... 39 more
Caused by: org.springframework.beans.PropertyBatchUpdateException; nested PropertyAccessExceptions (1) are:
PropertyAccessException 1: org.springframework.beans.MethodInvocationException: Property 'driverClassName' threw exception; nested exception is java.lang.IllegalStateException: Could not load JDBC driver class [com.mysql.jdbc.Driver]
at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:102)

[今天晴]

jar包有没有addtobuildpath，不行的话换个版本

[阳光越来越暖]

你的jar包 看起来都是没导的样子 buildpath 一下

[walkuere]

不是这里 右键项目 属性 build path 然后选library，再选add external jar

[codingjav]

jar包没导进去吧

[java叶新东老师]

没有驱动包。 在oracle的lib文件夹下classes12.jar倒进去

[客官酒来了]

问题解决了，hibernate方言配置错了

[代码段子手]

可能是jar包没有导入导致的，我就是这个原因，不知道您的是什么原因