1.spring异常：Caused by: java.lang.NoClassDefFoundError: org/aopalliance/intercept/MethodInterceptor

 org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.aop.config.internalAutoProxyCreator': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/aopalliance/intercept/MethodInterceptor
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1011)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:957)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:490)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)
     at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:198)
     at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:741)
     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
     at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
     at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
     at com.bjsxt.service.UserServiceTest.testAdd(UserServiceTest.java:14)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
     at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
     at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
     at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
     at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
     at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
     at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
     at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
     at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
     at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
     at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
     at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
     at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
     at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
     at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
 Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/aopalliance/intercept/MethodInterceptor
     at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:163)
     at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:87)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1004)
     ... 35 more
 Caused by: java.lang.NoClassDefFoundError: org/aopalliance/intercept/MethodInterceptor
     at org.springframework.aop.framework.adapter.DefaultAdvisorAdapterRegistry.<init>(DefaultAdvisorAdapterRegistry.java:50)
     at org.springframework.aop.framework.adapter.GlobalAdvisorAdapterRegistry.<clinit>(GlobalAdvisorAdapterRegistry.java:32)
     at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.<init>(AbstractAutoProxyCreator.java:116)
     at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.<init>(AbstractAdvisorAutoProxyCreator.java:48)
     at org.springframework.aop.aspectj.autoproxy.AspectJAwareAdvisorAutoProxyCreator.<init>(AspectJAwareAdvisorAutoProxyCreator.java:47)
     at org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator.<init>(AnnotationAwareAspectJAutoProxyCreator.java:49)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
     at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
     at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:148)
     ... 37 more
 Caused by: java.lang.ClassNotFoundException: org.aopalliance.intercept.MethodInterceptor
     at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
     at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
     ... 48 more

原因：Caused by: java.lang.NoClassDefFoundError: org/aopalliance/intercept/MethodInterceptor

说明可能是缺少 aopalliance.jar包。