aspectJ error at ::0 formal unbound in pointcut

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异常详情

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'StudentsImpl' defined in class path resource [beans.xml]: Initialization of bean failed; nested exception isjava.lang.IllegalArgumentException: error at ::0 formal unbound in pointcut    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527)    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.DefaultSingletonBeanRegistry.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.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580)    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)    at org.springframework.context.support.ClassPathXmlApplicationContext.(ClassPathXmlApplicationContext.java:139)    at org.springframework.context.support.ClassPathXmlApplicationContext.(ClassPathXmlApplicationContext.java:83)    at TestStudentsDAOProxy.main(TestStudentsDAOProxy.java:11) Caused by: java.lang.IllegalArgumentException: error at ::0 formal unbound in pointcut    at org.aspectj.weaver.tools.PointcutParser.parsePointcutExpression(PointcutParser.java:302)    at org.springframework.aop.aspectj.AspectJExpressionPointcut.buildPointcutExpression(AspectJExpressionPointcut.java:195)    at org.springframework.aop.aspectj.AspectJExpressionPointcut.checkReadyToMatch(AspectJExpressionPointcut.java:181)    at org.springframework.aop.aspectj.AspectJExpressionPointcut.getClassFilter(AspectJExpressionPointcut.java:162)    at org.springframework.aop.support.AopUtils.canApply(AopUtils.java:200)    at org.springframework.aop.support.AopUtils.canApply(AopUtils.java:254)    at org.springframework.aop.support.AopUtils.findAdvisorsThatCanApply(AopUtils.java:286)    at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findAdvisorsThatCanApply(AbstractAdvisorAutoProxyCreator.java:117)    at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findEligibleAdvisors(AbstractAdvisorAutoProxyCreator.java:87)    at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.getAdvicesAndAdvisorsForBean(AbstractAdvisorAutoProxyCreator.java:68)    at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.wrapIfNecessary(AbstractAutoProxyCreator.java:359)    at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java:322)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:407)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1426)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)    ... 11 more

 

错误代码

package com.eden.proxy;   import java.lang.reflect.Method;   import org.aspectj.lang.annotation.AfterReturning; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Before; import org.springframework.stereotype.Component;   /**  * 使用AspectJ的切面类  * @author Administrator  */ @Aspect    //声明为一个 AspectJ切面 @Component//声明为组件，这样系统启动会进行该类的初始化 publicclass StudentsDaoAspectJ {          @AfterReturning("execution(public void com.eden.dao.impl.StudentsImpl.*())")    publicvoid afterReturning(Object arg0, Method arg1, Object[] arg2,         Object arg3)throws Throwable {       System.out.println("方法执行后。。。");    }    @Before("execution(public void com.eden.dao.impl.StudentsImpl.*())")    publicvoid before(Method arg0, Object[] arg1, Object arg2)         throws Throwable {       System.out.println("方法执行前。。。");    } }

错误原因

      定义了通知方法，方法需要参数，但是注解设置没有指定调用方法参数，需要把通知方法中的参数删掉，变成空参数方法（如何设置带有参数的通知方法，还不清楚^_^）

正确代码

package com.eden.proxy;   import java.lang.reflect.Method;   import org.aspectj.lang.annotation.AfterReturning; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Before; import org.springframework.stereotype.Component;   /**  * 使用AspectJ的切面类  * @author Administrator  */ @Aspect    //声明为一个 AspectJ切面 @Component//声明为组件，这样系统启动会进行该类的初始化 publicclass StudentsDaoAspectJ {          @AfterReturning("execution(public void com.eden.dao.impl.StudentsImpl.*())")    publicvoid afterReturning() throws Throwable {       System.out.println("方法执行后。。。");    }    @Before("execution(public void com.eden.dao.impl.StudentsImpl.*())")    publicvoid before()         throws Throwable {       System.out.println("方法执行前。。。");    } }

正确输出

log4j:WARN No appenders could be found for logger (org.springframework.context.support.ClassPathXmlApplicationContext). log4j:WARN Please initialize the log4j system properly. 方法执行前。。。 保存成功 方法执行后。。。