配置aop的xml形式，报错

错误信息：

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'calcImpl' defined in class path resource [application_Aop_ByXML.xml]: BeanPostProcessor before instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.aop.aspectj.AspectJPointcutAdvisor#0': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.aop.aspectj.AspectJPointcutAdvisor]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: warning no match for this type name: ssm.example.beAop_ByXML.impl [Xlint:invalidAbsoluteTypeName]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:512)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:882)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:144)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:85)
    at ssm.example.beAop_ByXML.test.TestAop_Order.main(TestAop_Order.java:14)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.aop.aspectj.AspectJPointcutAdvisor#0': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.aop.aspectj.AspectJPointcutAdvisor]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: warning no match for this type name: ssm.example.beAop_ByXML.impl [Xlint:invalidAbsoluteTypeName]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:314)
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:295)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1358)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1204)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:207)
    at org.springframework.aop.framework.autoproxy.BeanFactoryAdvisorRetrievalHelper.findAdvisorBeans(BeanFactoryAdvisorRetrievalHelper.java:91)
    at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findCandidateAdvisors(AbstractAdvisorAutoProxyCreator.java:109)
    at org.springframework.aop.aspectj.autoproxy.AspectJAwareAdvisorAutoProxyCreator.shouldSkip(AspectJAwareAdvisorAutoProxyCreator.java:101)
    at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessBeforeInstantiation(AbstractAutoProxyCreator.java:251)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInstantiation(AbstractAutowireCapableBeanFactory.java:1141)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.resolveBeforeInstantiation(AbstractAutowireCapableBeanFactory.java:1114)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:506)
    ... 10 more
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.aop.aspectj.AspectJPointcutAdvisor]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: warning no match for this type name: ssm.example.beAop_ByXML.impl [Xlint:invalidAbsoluteTypeName]
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:217)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:117)
    at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:310)
    ... 26 more
Caused by: java.lang.IllegalArgumentException: warning no match for this type name: ssm.example.beAop_ByXML.impl [Xlint:invalidAbsoluteTypeName]
    at org.aspectj.weaver.tools.PointcutParser.parsePointcutExpression(PointcutParser.java:302)
    at org.springframework.aop.aspectj.AspectJExpressionPointcut.buildPointcutExpression(AspectJExpressionPointcut.java:227)
    at org.springframework.aop.aspectj.AspectJExpressionPointcut.obtainPointcutExpression(AspectJExpressionPointcut.java:198)
    at org.springframework.aop.aspectj.AspectJExpressionPointcut.getMethodMatcher(AspectJExpressionPointcut.java:183)
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.buildSafePointcut(AbstractAspectJAdvice.java:202)
    at org.springframework.aop.aspectj.AspectJPointcutAdvisor.<init>(AspectJPointcutAdvisor.java:52)
    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:204)
    ... 28 more

xml配置源码：

<?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
       https://www.springframework.org/schema/aop/spring-aop.xsd">
    <!--    类似于@Component-->
    <!--    装配bean-->
    <bean id="calcImpl" class="ssm.example.beAop_ByXML.impl.CalcImpl" />
    <!--    装配bean的切面部分-->
    <bean id="myLogging" class="ssm.example.beAop_ByXML.aop.MyLogging" />
    <bean id="calcImpl_Verify" class="ssm.example.beAop_ByXML.aop.CalcImpl_Verify" />
    <!--    类似于@Aspect
        ①定义切入点表达式
        ②定义切面
        ③定义通知
    -->
    <aop:config>
<!--        定义切入点表达式 注意，如果此处的表达式，写错了，编译不会报错，运行时，会出现-->
        <aop:pointcut id="myPoint" expression="execution(* ssm.example.beAop_ByXML.impl.*.*(..))"/>
<!--        定义切面-->
        <aop:aspect id="myLogging" ref="myLogging" order="0" >
<!--            前置通知-->
            <aop:before method="methodBefore" pointcut-ref="myPoint" />
<!--            后置通知-->
            <aop:after method="methodAfter" pointcut-ref="myPoint"/>
<!--            返回通知-->
            <aop:after-returning method="methodAfterReturning" pointcut-ref="myPoint" returning="rs"/>
<!--            异常通知-->
            <aop:after-throwing method="methodAfterThrowing" pointcut-ref="myPoint" throwing="ex"/>
<!--            环绕通知-->
            <aop:around method="aroundMethod" pointcut-ref="myPoint"/>
        </aop:aspect>
        <aop:aspect id="calcImpl_Verify" ref="calcImpl_Verify" order="1">
<!--            前置通知-->
            <aop:before method="methodBeforeV" pointcut="myPoint"/>
        </aop:aspect>
    </aop:config>

</beans>

原因分析：

可以看到错误信息第一行，其实已经说明了

①Error creating bean with name 'calcImpl' defined in class path resource [application_Aop_ByXML.xml]

　　通过xml配置文件和byname方式calcImpl 没创建成功

②BeanPostProcessor before instantiation of bean failed

　　bean实例初始化之前BeanPostProcessor 失败了

③nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.aop.aspectj.AspectJPointcutAdvisor#0': Bean instantiation via constructor failed; 

　　嵌套的异常 是实例创建异常：在创建AspectJ的切入点Advisor时：通过构造函数实例化Bean失败；

④ nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.aop.aspectj.AspectJPointcutAdvisor]:

　　嵌套的异常 是实例初始化的异常：AspectJPointcutAdvisor初始化失败

 

⑤ Constructor threw exception; nested exception is java.lang.IllegalArgumentException: warning no match for this type name: ssm.example.beAop_ByXML.impl [Xlint:invalidAbsoluteTypeName]

　　构造器抛出的异常：嵌套的异常是 不合法的参数异常：警告 没有匹配的类型名字：ssm.example.beAop_ByXML.impl[Xlint:绝对类型名无效]

……

通过这些分析，也就是发生在嵌套异常这一块，并且是在关于创建切入点的时候发生的异常-->绝对类型名无效

发现xml配置文件中，共出现4次绝对类型名：最终发现在最后一处的绝对类型名处，少加了.*

<aop:pointcut id="myPoint" expression="execution(* ssm.example.beAop_ByXML.impl.*.*(..))"/>
<!--
第一个*：表示匹配任何限定修饰符 和 任何返回值类型
第二个*：表示ssm.example.beAop_ByXML.impl包下的所有类
第三个*：表示这些类写的所有方法
括号里的..:表示匹配所有方法
-->

解决：

加上就好了

反思：

日志信息很全，多看看