Question

Spring AOP AspectJ注释示例使用@Before

使用 Java 1.8 eclipse版本：2019-06（4.12.0）

弹簧罐
aopalliance-1.0jar
aspectjrt 1.6.8
aspectweaver 1.6.2
cglib-3.2.6
spring-aop-4.3.9

操作类别

package com.rks.beans;
public class Operation 
{
    public void msg()
    {
        System.out.println("msg method invoked");
    }
    public int m()
    {
        System.out.println("m method invoked..");
        return 2;
    }
    public void k()
    {
        System.out.println("k method invoked..");
    }
}

TrackOperation.java类

package com.rks.beans;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
@Aspect
public class TrackOperation
{
    @Pointcut("execusion(* com.rks.beans.Operation.*(..))")
    public void k() //poincut name
    {

    }
    @Before("k()")//applying poincut on before advice
    public void myadvice(JoinPoint jp)
    {
        System.out.println("Addition concern");
    }
}

spring.xml

<?xml version="1.0" encoding="UTF-8"?>  
<beans xmlns="http://www.springframework.org/schema/beans"  
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
    xmlns:aop="http://www.springframework.org/schema/aop"   
       xsi:schemaLocation="http://www.springframework.org/schema/beans   
       http://www.springframework.org/schema/beans/spring-beans.xsd   
       http://www.springframework.org/schema/aop   
       http://www.springframework.org/schema/aop/spring-aop.xsd">  

    <bean id="opBean" class="com.rks.beans.Operation">   </bean>  
    <bean id="trackMyBean" class="com.rks.beans.TrackOperation"></bean>  

    <bean class="org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator"></bean>  

</beans>

测试类

package com.rks.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.rks.beans.Operation;

public class Test 
{

    public static void main(String[] args)
    {
      ApplicationContext context=new ClassPathXmlApplicationContext("/com/rks/resources/spring.xml");
      Operation e=(Operation)context.getBean("opBean");
      System.out.println("Calling msg");
      e.msg();
      System.out.println("Calling m");
      e.m();
      System.out.println("Calling k");
      e.k();
    }
}

错误

log4j:WARN No appenders could be found for logger (org.springframework.context.support.ClassPathXmlApplicationContext).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator#0' defined in class path resource [com/rks/resources/spring.xml]: Instantiation of bean failed; nested exception is java.lang.NoSuchFieldError: INSTANCE
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:946)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:892)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:479)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:450)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:290)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:287)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:687)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:408)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
    at com.rks.test.Test.main(Test.java:13)
Caused by: java.lang.NoSuchFieldError: INSTANCE
    at org.springframework.aop.aspectj.autoproxy.AspectJPrecedenceComparator.<init>(AspectJPrecedenceComparator.java:65)
    at org.springframework.aop.aspectj.autoproxy.AspectJAwareAdvisorAutoProxyCreator.<clinit>(AspectJAwareAdvisorAutoProxyCreator.java:49)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:126)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:72)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:939)
    ... 12 more

Answer 1

java.lang.NoSuchFieldError：落入2个案例中的1个案例引起的INSTANCE错误：
-没有豆子
-超过1个bean（仅1个类为2、3或4个bean）
我看到您同时使用了 spring-aop-4.3.9 和 aopalliance-1.0jar 。尝试删除 aopalliance-1.0jar 并再次运行。
另一件事看起来很像版本不匹配。您确定所有的Spring jar都是相同的版本吗？

创建名称为'org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator＃0的bean时出错？

1 个答案: