org.springframework.beans.factor…

遇到报错，应该先看错误最后面缺啥类：如报错消息所示，其实是缺乏aopalliance：

Exception in thread "main"org.springframework.beans.factory.CannotLoadBeanClassException: Error loadingclass [aop.aspect.SleepHelper] for bean with name 'sleepHelper'defined in class path resource [configuration/beans.xml]: problemwith class file or dependent class; nested exception isjava.lang.NoClassDefFoundError: org/aopalliance/aop/Advice

atorg.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.

atorg.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.

atorg.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.

atorg.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.

atorg.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.

atorg.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.

atorg.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.

atorg.springframework.context.support.ClassPathXmlApplicationContext.(ClassPathXmlApplicationContext.

atorg.springframework.context.support.ClassPathXmlApplicationContext.(ClassPathXmlApplicationContext.

atMain.MainClass.main(MainClass.

Caused by:java.lang.NoClassDefFoundError:org/aopalliance/aop/Advice

at

at

at

at

at

at

at

atjava.security.AccessController.doPrivileged(NativeMethod)

at

at

atsun.misc.Launcher$AppClassLoader.loadClass(Launcher.

at

at

at

at

at

at

at

at

atjava.security.AccessController.doPrivileged(NativeMethod)

at

at

atsun.misc.Launcher$AppClassLoader.loadClass(Launcher.

at

at

at

at

at

at

at

at

atjava.security.AccessController.doPrivileged(NativeMethod)

at

at

atsun.misc.Launcher$AppClassLoader.loadClass(Launcher.

at

atorg.springframework.util.ClassUtils.forName(ClassUtils.

atorg.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.

atorg.springframework.beans.factory.support.AbstractBeanFactory.doResolveBeanClass(AbstractBeanFactory.

atorg.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.

... 9 more

Caused by:java.lang.ClassNotFoundException:org.aopalliance.aop.Advice

at

at

atsun.misc.Launcher$AppClassLoader.loadClass(Launcher.

at

... 49 more

　　一开始比较难发现，总以为是自己写的类或者路径没有对应上。其实并不是，由于使用了Spring托管类，所以需要那个jar文件。而Spring4却没包含这个包，似乎是一个外部开发的包，所以需要下载下来添加到库里。其实这个错误，我在Netbeans里是使用清理构建后，查看错误消息后才知道的。

错误: 无法访问Advice

public class SleepHelperimplements MethodBeforeAdvice,AfterReturningAdvice{

找不到org.aopalliance.aop.Advice的类文件

　　导入正确的包后，就没有问题了。