aspectJ error at ::0 formal unbound in pointcut

 

 

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.<init>(ClassPathXmlApplicationContext.java:139)

   at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(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。。。