failedtocreatejavavirtual，noconstructorfoundin

自己写aop例子时遇到报错如下： Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.AutoConfigurationPackages': Initialization of bean failed; nested exception is org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class org.springframework.boot.autoconfigure.AutoConfigurationPackages$BasePackages: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Cannot subclass final class org.springframework.boot.autoconfigure.AutoConfigurationPackages$BasePackagesat org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:601)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845)at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877)at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)at org.springframework.context.annotation.AnnotationConfigApplicationContext.(AnnotationConfigApplicationContext.java:88)at com.tower.springdemo.ioc.test.GetBeanTest.main(GetBeanTest.java:13)Caused by: org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class org.springframework.boot.autoconfigure.AutoConfigurationPackages$BasePackages: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Cannot subclass final class org.springframework.boot.autoconfigure.AutoConfigurationPackages$BasePackagesat org.springframework.aop.framework.CglibAopProxy.getProxy(CglibAopProxy.java:208)at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:110)at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.createProxy(AbstractAutoProxyCreator.java:471)at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.wrapIfNecessary(AbstractAutoProxyCreator.java:350)at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java:299)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:429)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1782)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593)... 10 moreCaused by: java.lang.IllegalArgumentException: Cannot subclass final class org.springframework.boot.autoconfigure.AutoConfigurationPackages$BasePackagesat org.springframework.cglib.proxy.Enhancer.generateClass(Enhancer.java:657)at org.springframework.cglib.transform.TransformingClassGenerator.generateClass(TransformingClassGenerator.java:33)at org.springframework.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)at org.springframework.aop.framework.CglibAopProxy$ClassLoaderAwareUndeclaredThrowableStrategy.generate(CglibAopProxy.java:1007)at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:358)at org.springframework.cglib.proxy.Enhancer.generate(Enhancer.java:582)at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:110)at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:108)at org.springframework.cglib.core.internal.LoadingCache$2.call(LoadingCache.java:54)at java.util.concurrent.FutureTask.run(FutureTask.java:266)at org.springframework.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:61)at org.springframework.cglib.core.internal.LoadingCache.get(LoadingCache.java:34)at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData.get(AbstractClassGenerator.java:134)at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:319)at org.springframework.cglib.proxy.Enhancer.createHelper(Enhancer.java:569)at org.springframework.cglib.proxy.Enhancer.createClass(Enhancer.java:416)at org.springframework.aop.framework.ObjenesisCglibAopProxy.createProxyClassAndInstance(ObjenesisCglibAopProxy.java:57)at org.springframework.aop.framework.CglibAopProxy.getProxy(CglibAopProxy.java:205)... 17 more 问题原因：

切点定义方法太泛了引起的问题

@Pointcut("execution(public * *(..))") public void printLog(){ }; 解决方案

将切点定义的方法范围缩小，问题就解决了

@Pointcut("execution(* com.tower.springdemo.aop.service..*(..))") public void printLog(){ };