测试用例1

连接点

@Component
public class UserServiceImpl implements UserService {@Overridepublic void save(UserInfo userInfo) {System.out.println("执行保存:"+userInfo.getName());}
}

测试用例2

切点pointCut、切面testAspect、前置通知methodBefore和后置通知methodAfter

@Aspect
@Component
public class TestAspect {@Pointcut("execution(* com.helloworld.service.impl.UserServiceImpl.*(..))")public void pointCut(){};@Before(value = "pointCut()")public void methodBefore(JoinPoint joinPoint) {String methodName = joinPoint.getSignature().getName();System.out.println("执行目标方法【"+methodName+"】的<前置通知>,入参"+ Arrays.asList(joinPoint.getArgs()));}@After(value = "pointCut()")public void methodAfter(JoinPoint joinPoint) {String methodName = joinPoint.getSignature().getName();System.out.println("执行目标方法【"+methodName+"】的<后置通知>,入参"+Arrays.asList(joinPoint.getArgs()));}
}

测试用例3

测试用例：启动引导类，新建spring容器对象AnnotationConfigApplicationContext

@Configuration
@ComponentScan
@EnableAspectJAutoProxy(proxyTargetClass = true)
public class DemoApplication {public static void main( String[] args ) {AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(DemoApplication.class);UserService userService = (UserService) ctx.getBean("userServiceImpl");UserInfo userInfo = (UserInfo) ctx.getBean("user_zhangsan");userService.save(userInfo);}
}

下面执行userServiceImpl的save方法，首先获取userServiceImpl的通知

将断点打到MethodBeforeAdviceInterceptor.MethodBeforeAdviceInterceptor()方法,则代码执行过程如下

代码块1：main

拦截

参数：args=[]

package com.helloworld;public class DemoApplication {public static void main( String[] args ) { //args=[];......userService.save(userInfo);"(1) 拦截""参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)""参数：args=com.helloworld.entity.UserInfo@2e9fda69,"}}

代码块2：intercept

获取拦截器和动态拦截通知

参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)

参数：args=com.helloworld.entity.UserInfo@2e9fda69,

package org.springframework.aop.framework;public class CglibAopProxy implements AopProxy{@Override@Nullablepublic Object intercept(Object proxy, Method method, Object[] args, MethodProxy methodProxy) throws Throwable { //method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo);args=com.helloworld.entity.UserInfo@2e9fda69,;......List<Object> chain = this.advised.getInterceptorsAndDynamicInterceptionAdvice(method, targetClass); //Get the interception chain for this method.1-获取目标方法的拦截链   chain=org.springframework.aop.interceptor.ExposeInvocationInterceptor@241e8ea6,org.springframework.aop.aspectj.AspectJAfterAdvice: advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect',org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor@53dacd14,; "(2) 获取拦截器和动态拦截通知""参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)""参数：targetClass=class com.helloworld.service.impl.UserServiceImpl""Get the interception chain for this method.1-获取目标方法的拦截链  chain=org.springframework.aop.interceptor.ExposeInvocationInterceptor@241e8ea6,org.springframework.aop.aspectj.AspectJAfterAdvice: advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect',org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor@53dacd14,;"......}}

代码块3：getInterceptorsAndDynamicInterceptionAdvice

获取拦截器和动态拦截通知

参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)

参数：targetClass=class com.helloworld.service.impl.UserServiceImpl

package org.springframework.aop.framework;public class AdvisedSupport extends ProxyConfig implements Advised{public List<Object> getInterceptorsAndDynamicInterceptionAdvice(Method method, @Nullable Class<?> targetClass) { //method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo);targetClass=class com.helloworld.service.impl.UserServiceImpl;......cached = this.advisorChainFactory.getInterceptorsAndDynamicInterceptionAdvice( //    cached=org.springframework.aop.interceptor.ExposeInvocationInterceptor@241e8ea6,org.springframework.aop.aspectj.AspectJAfterAdvice: advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect',org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor@53dacd14,; this, method, targetClass);"(3) 获取拦截器和动态拦截通知""参数：config=org.springframework.aop.framework.ProxyFactory: 0 interfaces []; 3 advisors [org.springframework.aop.interceptor.ExposeInvocationInterceptor.ADVISOR, InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON, InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON]; targetSource [SingletonTargetSource for target object [com.helloworld.service.impl.UserServiceImpl@23aa363a]]; proxyTargetClass=true; optimize=false; opaque=false; exposeProxy=false; frozen=false""参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)""参数：targetClass=class com.helloworld.service.impl.UserServiceImpl""cached=org.springframework.aop.interceptor.ExposeInvocationInterceptor@241e8ea6,org.springframework.aop.aspectj.AspectJAfterAdvice: advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect',org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor@53dacd14,;"......}}

代码块4：getInterceptorsAndDynamicInterceptionAdvice

获取拦截器

参数：config=org.springframework.aop.framework.ProxyFactory: 0 interfaces []; 3 advisors [org.springframework.aop.interceptor…

参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)

参数：targetClass=class com.helloworld.service.impl.UserServiceImpl

package org.springframework.aop.framework;public class DefaultAdvisorChainFactory implements AdvisorChainFactory{@Overridepublic List<Object> getInterceptorsAndDynamicInterceptionAdvice( //config=org.springframework.aop.framework.ProxyFactory: 0 interfaces []; 3 advisors [org.springframework.aop.interceptor.ExposeInvocationInterceptor.ADVISOR, InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON, InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON]; targetSource [SingletonTargetSource for target object [com.helloworld.service.impl.UserServiceImpl@23aa363a]]; proxyTargetClass=true; optimize=false; opaque=false; exposeProxy=false; frozen=false;method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo);targetClass=class com.helloworld.service.impl.UserServiceImpl;Advised config, Method method, @Nullable Class<?> targetClass) {......MethodInterceptor[] interceptors = registry.getInterceptors(advisor); //将advisor转为MethodInterceptor  interceptors=org.springframework.aop.interceptor.ExposeInvocationInterceptor@241e8ea6,; interceptors=org.springframework.aop.aspectj.AspectJAfterAdvice: advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect',; interceptors=org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor@53dacd14,; "(4) 获取拦截器""参数：advisor=InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON""将advisor转为MethodInterceptor    interceptors=org.springframework.aop.interceptor.ExposeInvocationInterceptor@241e8ea6,; interceptors=org.springframework.aop.aspectj.AspectJAfterAdvice: advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect',; interceptors=org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor@53dacd14,;"......}}

代码块5：getInterceptors

获取拦截器

参数：advisor=InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.T…

package org.springframework.aop.framework.adapter;public class DefaultAdvisorAdapterRegistry implements AdvisorAdapterRegistry{@Overridepublic MethodInterceptor[] getInterceptors(Advisor advisor) throws UnknownAdviceTypeException { //advisor=InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON;......interceptors.add(adapter.getInterceptor(advisor)); //获取方法拦截器并放入到集合中返回"(5) 获取拦截器""参数：advisor=InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON""获取方法拦截器并放入到集合中返回"......}}

代码块6：getInterceptor

init

参数：advisor=InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.T…

package org.springframework.aop.framework.adapter;public class MethodBeforeAdviceAdapter implements AdvisorAdapter{@Overridepublic MethodInterceptor getInterceptor(Advisor advisor) { //advisor=InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON;......return new MethodBeforeAdviceInterceptor(advice); //通知类型匹配对应的拦截器"(6) init""参数：advice=org.springframework.aop.aspectj.AspectJMethodBeforeAdvice: advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect'""通知类型匹配对应的拦截器"}}

代码块7：MethodBeforeAdviceInterceptor()

创建前置通知拦截器对象

参数：advice=org.springframework.aop.aspectj.AspectJMethodBeforeAdvice: advice method [public void com.helloworld.aop.TestAspe…

package org.springframework.aop.framework.adapter;public class MethodBeforeAdviceInterceptor implements MethodInterceptor{public MethodBeforeAdviceInterceptor(MethodBeforeAdvice advice) { //advice=org.springframework.aop.aspectj.AspectJMethodBeforeAdvice: advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect';......this.advice = advice; //  this.advice=org.springframework.aop.aspectj.AspectJMethodBeforeAdvice: advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect'; "(7) 创建前置通知拦截器对象""this.advice=org.springframework.aop.aspectj.AspectJMethodBeforeAdvice: advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect';"}}

小结：调用栈

下面执行userServiceImpl的save方法，首先获取userServiceImpl的通知

*DemoApplication.main()
*CglibAopProxy$DynamicAdvisedInterceptor.intercept()
*AdvisedSupport.getInterceptorsAndDynamicInterceptionAdvice()
*DefaultAdvisorChainFactory.getInterceptorsAndDynamicInterceptionAdvice()
*DefaultAdvisorAdapterRegistry.getInterceptors()
*MethodBeforeAdviceAdapter.getInterceptor()
*MethodBeforeAdviceInterceptor.MethodBeforeAdviceInterceptor()

调用methodBefore前置通知

将断点打到TestAspect.methodBefore方法,则代码执行过程如下

代码块8：intercept

继续进行

参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)

参数：args=com.helloworld.entity.UserInfo@2e9fda69,

package org.springframework.aop.framework;public class CglibAopProxy implements AopProxy{@Override@Nullablepublic Object intercept(Object proxy, Method method, Object[] args, MethodProxy methodProxy) throws Throwable { //method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo);args=com.helloworld.entity.UserInfo@2e9fda69,;......List<Object> chain = this.advised.getInterceptorsAndDynamicInterceptionAdvice(method, targetClass);"(2)"retVal = new CglibMethodInvocation(proxy, target, method, args, targetClass, chain, methodProxy).proceed(); //封装拦截器链并执行"(8) 继续进行""封装拦截器链并执行"......}}

代码块9：proceed

调用

package org.springframework.aop.framework;public class ReflectiveMethodInvocation implements ProxyMethodInvocation{@Override@Nullablepublic Object proceed() throws Throwable {......return ((MethodInterceptor) interceptorOrInterceptionAdvice).invoke(this); //It's an interceptor, so we just invoke it: The pointcut will havebeen evaluated statically before this object was constructed.普通的拦截器，直接调用即可"(9) 调用""It's an interceptor, so we just invoke it: The pointcut will havebeen evaluated statically before this object was constructed.普通的拦截器，直接调用即可"......}}

代码块10：invoke

继续进行

package org.springframework.aop.interceptor;public class ExposeInvocationInterceptor implements MethodInterceptor{@Overridepublic Object invoke(MethodInvocation mi) throws Throwable {......return mi.proceed(); //执行目标方法"(10) 继续进行""执行目标方法"......}}

代码块11：proceed

调用

package org.springframework.aop.framework;public class ReflectiveMethodInvocation implements ProxyMethodInvocation{@Override@Nullablepublic Object proceed() throws Throwable {......return ((MethodInterceptor) interceptorOrInterceptionAdvice).invoke(this); //It's an interceptor, so we just invoke it: The pointcut will havebeen evaluated statically before this object was constructed.普通的拦截器，直接调用即可"(11) 调用""It's an interceptor, so we just invoke it: The pointcut will havebeen evaluated statically before this object was constructed.普通的拦截器，直接调用即可"......}}

代码块12：invoke

继续进行

package org.springframework.aop.aspectj;public class AspectJAfterAdvice extends AbstractAspectJAdvice implements MethodInterceptor{@Overridepublic Object invoke(MethodInvocation mi) throws Throwable {......return mi.proceed(); //执行目标方法"(12) 继续进行""执行目标方法"......}}

代码块13：proceed

调用

package org.springframework.aop.framework;public class ReflectiveMethodInvocation implements ProxyMethodInvocation{@Override@Nullablepublic Object proceed() throws Throwable {......return ((MethodInterceptor) interceptorOrInterceptionAdvice).invoke(this); //It's an interceptor, so we just invoke it: The pointcut will havebeen evaluated statically before this object was constructed.普通的拦截器，直接调用即可"(13) 调用""It's an interceptor, so we just invoke it: The pointcut will havebeen evaluated statically before this object was constructed.普通的拦截器，直接调用即可"......}}

代码块14：invoke

在此之前

package org.springframework.aop.framework.adapter;public class MethodBeforeAdviceInterceptor implements MethodInterceptor{@Overridepublic Object invoke(MethodInvocation mi) throws Throwable {this.advice.before(mi.getMethod(), mi.getArguments(), mi.getThis()); //执行拦截器before方法"(14) 在此之前""参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)""参数：args=com.helloworld.entity.UserInfo@2e9fda69,""执行拦截器before方法"......}}

代码块15：before

调用通知方法

参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)

参数：args=com.helloworld.entity.UserInfo@2e9fda69,

package org.springframework.aop.aspectj;public class AspectJMethodBeforeAdvice extends AbstractAspectJAdvice implements MethodBeforeAdvice{@Overridepublic void before(Method method, Object[] args, @Nullable Object target) throws Throwable { //method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo);args=com.helloworld.entity.UserInfo@2e9fda69,;invokeAdviceMethod(getJoinPointMatch(), null, null); //执行增强方法"(15) 调用通知方法""执行增强方法"}}

代码块16：invokeAdviceMethod

使用给定参数调用通知方法

package org.springframework.aop.aspectj;public class AbstractAspectJAdvice implements Advice{protected Object invokeAdviceMethod(@Nullable JoinPointMatch jpMatch, @Nullable Object returnValue, @Nullable Throwable ex)throws Throwable {......return invokeAdviceMethodWithGivenArgs(argBinding(getJoinPoint(), jpMatch, returnValue, ex)); //执行参数绑定，然后使用参数调用通知方法"(16) 使用给定参数调用通知方法""参数：args=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo)),""执行参数绑定，然后使用参数调用通知方法"}}

代码块17：invokeAdviceMethodWithGivenArgs

方法之前

参数：args=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo)),

package org.springframework.aop.aspectj;public class AbstractAspectJAdvice implements Advice{protected Object invokeAdviceMethodWithGivenArgs(Object[] args) throws Throwable { //args=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo)),;......return this.aspectJAdviceMethod.invoke(this.aspectInstanceFactory.getAspectInstance(), actualArgs); //TODO AopUtils.invokeJoinpointUsingReflection反射调用通知方法this.aspectInstanceFactory.getAspectInstance()获取的是切面的实例"(17) 方法之前""参数：joinPoint=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo))""TODO AopUtils.invokeJoinpointUsingReflection反射调用通知方法this.aspectInstanceFactory.getAspectInstance()获取的是切面的实例"......}}

代码块18：methodBefore

调用前置通知

参数：joinPoint=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo))

package com.helloworld.aop;public class TestAspect {@Before(value = "pointCut()")public void methodBefore(JoinPoint joinPoint) { //joinPoint=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo));String methodName = joinPoint.getSignature().getName(); //获取方法名称"(18) 调用前置通知""获取方法名称"......}}

小结：调用栈

调用methodBefore前置通知

DemoApplication.main()
*CglibAopProxy$DynamicAdvisedInterceptor.intercept()
*ReflectiveMethodInvocation.proceed()
*ExposeInvocationInterceptor.invoke()
*ReflectiveMethodInvocation.proceed()
*AspectJAfterAdvice.invoke()
*ReflectiveMethodInvocation.proceed()
*MethodBeforeAdviceInterceptor.invoke()
*AspectJMethodBeforeAdvice.before()
*AbstractAspectJAdvice.invokeAdviceMethod()
*AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs()
*TestAspect.methodBefore()

调用连接点方法

将断点打到UserServiceImpl.save方法,则代码执行过程如下

代码块19：invoke

继续进行

package org.springframework.aop.framework.adapter;public class MethodBeforeAdviceInterceptor implements MethodInterceptor{@Overridepublic Object invoke(MethodInvocation mi) throws Throwable {......this.advice.before(mi.getMethod(), mi.getArguments(), mi.getThis());"(14)"return mi.proceed(); //执行目标方法"(19) 继续进行""执行目标方法"}}

代码块20：proceed

调用连接点

package org.springframework.aop.framework;public class ReflectiveMethodInvocation implements ProxyMethodInvocation{@Override@Nullablepublic Object proceed() throws Throwable {......return invokeJoinpoint(); //直接调用目标方法"(20) 调用连接点""直接调用目标方法"......}}

代码块21：invokeJoinpoint

调用

package org.springframework.aop.framework;public class CglibAopProxy implements AopProxy{@Overrideprotected Object invokeJoinpoint() throws Throwable {......return this.methodProxy.invoke(this.target, this.arguments);"(21) 调用"......}}

代码块22：invoke

保存

package org.springframework.cglib.proxy;public class MethodProxy {public Object invoke(Object obj, Object[] args) throws Throwable {......return fci.f1.invoke(fci.i1, obj, args);"(22) 保存"......}}

代码块23：save

调用连接点方法

package com.helloworld.service.impl;public class UserServiceImpl implements UserService{@Overridepublic void save(UserInfo userInfo) {System.out.println("执行保存:"+userInfo.getName());"(23) 调用连接点方法"}}

小结：调用栈

调用连接点方法

DemoApplication.main()
CglibAopProxy$DynamicAdvisedInterceptor.intercept()
ReflectiveMethodInvocation.proceed()
ExposeInvocationInterceptor.invoke()
ReflectiveMethodInvocation.proceed()
AspectJAfterAdvice.invoke()
ReflectiveMethodInvocation.proceed()
*MethodBeforeAdviceInterceptor.invoke()
*ReflectiveMethodInvocation.proceed()
*CglibAopProxy$CglibMethodInvocation.invokeJoinpoint()
*MethodProxy.invoke()
*UserServiceImpl.save()

调用methodAfter后置通知

将断点打到TestAspect.methodAfter方法,则代码执行过程如下

代码块24：proceed

调用通知方法

package org.springframework.aop.framework;public class ReflectiveMethodInvocation implements ProxyMethodInvocation{@Override@Nullablepublic Object proceed() throws Throwable {......return ((MethodInterceptor) interceptorOrInterceptionAdvice).invoke(this); //It's an interceptor, so we just invoke it: The pointcut will havebeen evaluated statically before this object was constructed.普通的拦截器，直接调用即可"(24) 调用通知方法""It's an interceptor, so we just invoke it: The pointcut will havebeen evaluated statically before this object was constructed.普通的拦截器，直接调用即可"......}}

代码块25：invokeAdviceMethod

使用给定参数调用通知方法

package org.springframework.aop.aspectj;public class AbstractAspectJAdvice implements Advice{protected Object invokeAdviceMethod(@Nullable JoinPointMatch jpMatch, @Nullable Object returnValue, @Nullable Throwable ex)throws Throwable {......return invokeAdviceMethodWithGivenArgs(argBinding(getJoinPoint(), jpMatch, returnValue, ex)); //执行参数绑定，然后使用参数调用通知方法"(25) 使用给定参数调用通知方法""参数：args=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo)),""执行参数绑定，然后使用参数调用通知方法"}}

代码块26：invokeAdviceMethodWithGivenArgs

方法之后

参数：args=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo)),

package org.springframework.aop.aspectj;public class AbstractAspectJAdvice implements Advice{protected Object invokeAdviceMethodWithGivenArgs(Object[] args) throws Throwable { //args=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo)),;......return this.aspectJAdviceMethod.invoke(this.aspectInstanceFactory.getAspectInstance(), actualArgs); //TODO AopUtils.invokeJoinpointUsingReflection反射调用通知方法this.aspectInstanceFactory.getAspectInstance()获取的是切面的实例"(26) 方法之后""参数：joinPoint=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo))""TODO AopUtils.invokeJoinpointUsingReflection反射调用通知方法this.aspectInstanceFactory.getAspectInstance()获取的是切面的实例"......}}

代码块27：methodAfter

调用后置通知

参数：joinPoint=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo))

package com.helloworld.aop;public class TestAspect {@After(value = "pointCut()")public void methodAfter(JoinPoint joinPoint) { //joinPoint=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo));String methodName = joinPoint.getSignature().getName(); //获取方法名称"(27) 调用后置通知""获取方法名称"......}}

小结：调用栈

调用methodAfter后置通知

DemoApplication.main()
CglibAopProxy$DynamicAdvisedInterceptor.intercept()
ReflectiveMethodInvocation.proceed()
ExposeInvocationInterceptor.invoke()
*ReflectiveMethodInvocation.proceed()
*AbstractAspectJAdvice.invokeAdviceMethod()
*AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs()
*TestAspect.methodAfter()

完整代码版

下面执行userServiceImpl的save方法，首先获取userServiceImpl的通知

将断点打到MethodBeforeAdviceInterceptor.MethodBeforeAdviceInterceptor()方法,则代码执行过程如下

代码块1：main

拦截

参数：args=[]

package com.helloworld;public class DemoApplication {public static void main( String[] args ) { //args=[];AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(DemoApplication.class);UserService userService = (UserService) ctx.getBean("userServiceImpl");UserInfo userInfo = (UserInfo) ctx.getBean("user_zhangsan");userService.save(userInfo);"(1) 拦截""参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)""参数：args=com.helloworld.entity.UserInfo@2e9fda69,"}}

代码块2：intercept

获取拦截器和动态拦截通知

参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)

参数：args=com.helloworld.entity.UserInfo@2e9fda69,

package org.springframework.aop.framework;public class CglibAopProxy implements AopProxy{@Override@Nullablepublic Object intercept(Object proxy, Method method, Object[] args, MethodProxy methodProxy) throws Throwable { //method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo);args=com.helloworld.entity.UserInfo@2e9fda69,;Object oldProxy = null; //被暴露在threadLocal中旧的代理对象boolean setProxyContext = false; //用来标记代理对象是否被暴露在threadLocal中  setProxyContext=false; Object target = null; //目标对象TargetSource targetSource = this.advised.getTargetSource(); //目标类     targetSource=SingletonTargetSource for target object [com.helloworld.service.impl.UserServiceImpl@23aa363a]; try {if (this.advised.exposeProxy) {// Make invocation available if necessary.oldProxy = AopContext.setCurrentProxy(proxy); //将代理对象暴露出去setProxyContext = true; //将setProxyContext置为true}// Get as late as possible to minimize the time we "own" the target, in case it comes from a pool...target = targetSource.getTarget(); //目标对象可能源自一个池或者一个简单的方法Class<?> targetClass = (target != null ? target.getClass() : null); //?获取目标对象类型    targetClass=class com.helloworld.service.impl.UserServiceImpl; List<Object> chain = this.advised.getInterceptorsAndDynamicInterceptionAdvice(method, targetClass); //Get the interception chain for this method.1-获取目标方法的拦截链    chain=org.springframework.aop.interceptor.ExposeInvocationInterceptor@241e8ea6,org.springframework.aop.aspectj.AspectJAfterAdvice: advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect',org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor@53dacd14,; "(2) 获取拦截器和动态拦截通知""参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)""参数：targetClass=class com.helloworld.service.impl.UserServiceImpl""Get the interception chain for this method.1-获取目标方法的拦截链  chain=org.springframework.aop.interceptor.ExposeInvocationInterceptor@241e8ea6,org.springframework.aop.aspectj.AspectJAfterAdvice: advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect',org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor@53dacd14,;"Object retVal;// Check whether we only have one InvokerInterceptor: that is,// no real advice, but just reflective invocation of the target.if (chain.isEmpty() && Modifier.isPublic(method.getModifiers())) {// We can skip creating a MethodInvocation: just invoke the target directly.// Note that the final invoker must be an InvokerInterceptor, so we know// it does nothing but a reflective operation on the target, and no hot// swapping or fancy proxying.Object[] argsToUse = AopProxyUtils.adaptArgumentsIfNecessary(method, args); //如果没有拦截器链，直接执行目标方法; ? ??? ???           // 拦截器链（每一个通知方法又被包装为方法拦截器，利用MethodInterceptor机制）retVal = methodProxy.invoke(target, argsToUse); //如果拦截器为空则直接执行目标方法}else {// We need to create a method invocation...retVal = new CglibMethodInvocation(proxy, target, method, args, targetClass, chain, methodProxy).proceed(); //封装拦截器链并执行}retVal = processReturnType(proxy, target, method, retVal); //处理返回值类型return retVal;}finally {if (target != null && !targetSource.isStatic()) {targetSource.releaseTarget(target); //必须释放来自TargetSource中的目标对象}if (setProxyContext) {// Restore old proxy.AopContext.setCurrentProxy(oldProxy); //需要将旧的代理再放回到上线文中}}}}

代码块3：getInterceptorsAndDynamicInterceptionAdvice

获取拦截器和动态拦截通知

参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)

参数：targetClass=class com.helloworld.service.impl.UserServiceImpl

package org.springframework.aop.framework;public class AdvisedSupport extends ProxyConfig implements Advised{public List<Object> getInterceptorsAndDynamicInterceptionAdvice(Method method, @Nullable Class<?> targetClass) { //method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo);targetClass=class com.helloworld.service.impl.UserServiceImpl;MethodCacheKey cacheKey = new MethodCacheKey(method); //缓存对象   cacheKey=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo); List<Object> cached = this.methodCache.get(cacheKey); //这里使用了缓存来提高效率，第一次获取还是要创建的。使用了 advisorChainFactory 生成拦截器链，advisorChainFactory 是 DefaultAdvisorChainFactory 的实例if (cached == null) { //如果没有缓存则从缓存里面拿cached = this.advisorChainFactory.getInterceptorsAndDynamicInterceptionAdvice( //  cached=org.springframework.aop.interceptor.ExposeInvocationInterceptor@241e8ea6,org.springframework.aop.aspectj.AspectJAfterAdvice: advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect',org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor@53dacd14,; this, method, targetClass);"(3) 获取拦截器和动态拦截通知""参数：config=org.springframework.aop.framework.ProxyFactory: 0 interfaces []; 3 advisors [org.springframework.aop.interceptor.ExposeInvocationInterceptor.ADVISOR, InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON, InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON]; targetSource [SingletonTargetSource for target object [com.helloworld.service.impl.UserServiceImpl@23aa363a]]; proxyTargetClass=true; optimize=false; opaque=false; exposeProxy=false; frozen=false""参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)""参数：targetClass=class com.helloworld.service.impl.UserServiceImpl""cached=org.springframework.aop.interceptor.ExposeInvocationInterceptor@241e8ea6,org.springframework.aop.aspectj.AspectJAfterAdvice: advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect',org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor@53dacd14,;"this, method, targetClass);this.methodCache.put(cacheKey, cached); //为目的对象的目标方法的拦截器链建立   cached=org.springframework.aop.interceptor.ExposeInvocationInterceptor@241e8ea6,org.springframework.aop.aspectj.AspectJAfterAdvice: advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect',org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor@53dacd14,; cacheKey=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo); }return cached; //  org.springframework.aop.interceptor.ExposeInvocationInterceptor@241e8ea6,org.springframework.aop.aspectj.AspectJAfterAdvice: advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect',org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor@53dacd14,; }}

代码块4：getInterceptorsAndDynamicInterceptionAdvice

获取拦截器

参数：config=org.springframework.aop.framework.ProxyFactory: 0 interfaces []; 3 advisors [org.springframework.aop.interceptor…

参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)

参数：targetClass=class com.helloworld.service.impl.UserServiceImpl

package org.springframework.aop.framework;public class DefaultAdvisorChainFactory implements AdvisorChainFactory{@Overridepublic List<Object> getInterceptorsAndDynamicInterceptionAdvice( //config=org.springframework.aop.framework.ProxyFactory: 0 interfaces []; 3 advisors [org.springframework.aop.interceptor.ExposeInvocationInterceptor.ADVISOR, InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON, InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON]; targetSource [SingletonTargetSource for target object [com.helloworld.service.impl.UserServiceImpl@23aa363a]]; proxyTargetClass=true; optimize=false; opaque=false; exposeProxy=false; frozen=false;method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo);targetClass=class com.helloworld.service.impl.UserServiceImpl;Advised config, Method method, @Nullable Class<?> targetClass) {// This is somewhat tricky... We have to process introductions first,// but we need to preserve order in the ultimate list.AdvisorAdapterRegistry registry = GlobalAdvisorAdapterRegistry.getInstance(); //* 调用DefaultAdvisorAdapterRegistry构造方法获取通知适配器注册器，包括：* 1. MethodBeforeAdviceAdapter* 2. AfterReturningAdviceAdapter* 3. ThrowsAdviceAdapter** Adapter添加进List中的顺序就是上面的顺序。** GlobalAdvisorAdapterRegistry.getInstance()实际上就是去获取DefaultAdvisorAdapterRegistry中的AdapterAdvisor[] advisors = config.getAdvisors(); //config在这里就是前面所说的ProxyFactory。从ProxyFactory中获取通知    advisors=org.springframework.aop.interceptor.ExposeInvocationInterceptor.ADVISOR,InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON,InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON,; List<Object> interceptorList = new ArrayList<>(advisors.length); //要返回的结果对象Class<?> actualClass = (targetClass != null ? targetClass : method.getDeclaringClass()); //获取被调用方法所在类实际的类型   actualClass=class com.helloworld.service.impl.UserServiceImpl; Boolean hasIntroductions = null;for (Advisor advisor : advisors) { //  advisor=InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON; advisor=InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON; if (advisor instanceof PointcutAdvisor) {// Add it conditionally.PointcutAdvisor pointcutAdvisor = (PointcutAdvisor) advisor; //将通知强转为切面    pointcutAdvisor=InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON; pointcutAdvisor=InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON; if (config.isPreFiltered() || pointcutAdvisor.getPointcut().getClassFilter().matches(actualClass)) { //  actualClass=class com.helloworld.service.impl.UserServiceImpl; config=org.springframework.aop.framework.ProxyFactory: 0 interfaces []; 3 advisors [org.springframework.aop.interceptor.ExposeInvocationInterceptor.ADVISOR, InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON, InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON]; targetSource [SingletonTargetSource for target object [com.helloworld.service.impl.UserServiceImpl@23aa363a]]; proxyTargetClass=true; optimize=false; opaque=false; exposeProxy=false; frozen=false; actualClass=class com.helloworld.service.impl.UserServiceImpl; config=org.springframework.aop.framework.ProxyFactory: 0 interfaces []; 3 advisors [org.springframework.aop.interceptor.ExposeInvocationInterceptor.ADVISOR, InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON, InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON]; targetSource [SingletonTargetSource for target object [com.helloworld.service.impl.UserServiceImpl@23aa363a]]; proxyTargetClass=true; optimize=false; opaque=false; exposeProxy=false; frozen=false; actualClass=class com.helloworld.service.impl.UserServiceImpl; config=org.springframework.aop.framework.ProxyFactory: 0 interfaces []; 3 advisors [org.springframework.aop.interceptor.ExposeInvocationInterceptor.ADVISOR, InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON, InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON]; targetSource [SingletonTargetSource for target object [com.helloworld.service.impl.UserServiceImpl@23aa363a]]; proxyTargetClass=true; optimize=false; opaque=false; exposeProxy=false; frozen=false; MethodMatcher mm = pointcutAdvisor.getPointcut().getMethodMatcher(); //获取 MethodMatcher ,用来匹配目标方法，如果匹配就放入到拦截器链中。pointcut 就是在这里使用的  mm=MethodMatcher.TRUE; mm=AspectJExpressionPointcut: () pointCut(); mm=AspectJExpressionPointcut: () pointCut(); boolean match;if (mm instanceof IntroductionAwareMethodMatcher) {if (hasIntroductions == null) {hasIntroductions = hasMatchingIntroductions(advisors, actualClass); //   hasIntroductions=false; }match = ((IntroductionAwareMethodMatcher) mm).matches(method, actualClass, hasIntroductions); //根据目标类型和方法，与方法匹配器是否匹配  match=true; match=true; }else {match = mm.matches(method, actualClass); //方法是否匹配     match=true; }if (match) {MethodInterceptor[] interceptors = registry.getInterceptors(advisor); //将advisor转为MethodInterceptor  interceptors=org.springframework.aop.interceptor.ExposeInvocationInterceptor@241e8ea6,; interceptors=org.springframework.aop.aspectj.AspectJAfterAdvice: advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect',; interceptors=org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor@53dacd14,; "(4) 获取拦截器""参数：advisor=InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON""将advisor转为MethodInterceptor    interceptors=org.springframework.aop.interceptor.ExposeInvocationInterceptor@241e8ea6,; interceptors=org.springframework.aop.aspectj.AspectJAfterAdvice: advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect',; interceptors=org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor@53dacd14,;"if (mm.isRuntime()) {// Creating a new object instance in the getInterceptors() method// isn't a problem as we normally cache created chains.for (MethodInterceptor interceptor : interceptors) {interceptorList.add(new InterceptorAndDynamicMethodMatcher(interceptor, mm)); //封装为 InterceptorAndDynamicMethodMatcher}}else {interceptorList.addAll(Arrays.asList(interceptors)); //不是动态的MethodMatcher,将所有的拦截器加入到返回List}}}}else if (advisor instanceof IntroductionAdvisor) {IntroductionAdvisor ia = (IntroductionAdvisor) advisor;if (config.isPreFiltered() || ia.getClassFilter().matches(actualClass)) {Interceptor[] interceptors = registry.getInterceptors(advisor); //其他类型interceptorList.addAll(Arrays.asList(interceptors)); //不是动态的MethodMatcher,将所有的拦截器加入到返回List}}else {Interceptor[] interceptors = registry.getInterceptors(advisor); //其他类型interceptorList.addAll(Arrays.asList(interceptors)); //不是动态的MethodMatcher,将所有的拦截器加入到返回List}}return interceptorList; //* 这里返回的拦截器链为：* 1.ExposeInvocationInterceptor* 2.AspectJAfterAdvice* 3.AspectJAroundAdvice* 4.MethodBeforeAdviceInterceptor     org.springframework.aop.interceptor.ExposeInvocationInterceptor@241e8ea6,org.springframework.aop.aspectj.AspectJAfterAdvice: advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect',org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor@53dacd14,; }}

代码块5：getInterceptors

获取拦截器

参数：advisor=InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.T…

package org.springframework.aop.framework.adapter;public class DefaultAdvisorAdapterRegistry implements AdvisorAdapterRegistry{@Overridepublic MethodInterceptor[] getInterceptors(Advisor advisor) throws UnknownAdviceTypeException { //advisor=InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON;List<MethodInterceptor> interceptors = new ArrayList<>(3);Advice advice = advisor.getAdvice(); //获取通知    advice=org.springframework.aop.aspectj.AspectJMethodBeforeAdvice: advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect'; if (advice instanceof MethodInterceptor) {interceptors.add((MethodInterceptor) advice); //如果是MethodInterceptor 直接加入到MethodInterceptor list 中不需要适配}for (AdvisorAdapter adapter : this.adapters) {if (adapter.supportsAdvice(advice)) { //     advice=org.springframework.aop.aspectj.AspectJMethodBeforeAdvice: advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect'; interceptors.add(adapter.getInterceptor(advisor)); //获取方法拦截器并放入到集合中返回"(5) 获取拦截器""参数：advisor=InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON""获取方法拦截器并放入到集合中返回"}}if (interceptors.isEmpty()) {throw new UnknownAdviceTypeException(advisor.getAdvice());}return interceptors.toArray(new MethodInterceptor[0]); //3.返回结果  org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor@53dacd14,; }}

代码块6：getInterceptor

init

参数：advisor=InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.T…

package org.springframework.aop.framework.adapter;public class MethodBeforeAdviceAdapter implements AdvisorAdapter{@Overridepublic MethodInterceptor getInterceptor(Advisor advisor) { //advisor=InstantiationModelAwarePointcutAdvisor: expression [pointCut()]; advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; perClauseKind=SINGLETON;MethodBeforeAdvice advice = (MethodBeforeAdvice) advisor.getAdvice(); //获取advice，创建 MethodBeforeAdviceInterceptor 对象并返回     advice=org.springframework.aop.aspectj.AspectJMethodBeforeAdvice: advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect'; return new MethodBeforeAdviceInterceptor(advice); //通知类型匹配对应的拦截器"(6) init""参数：advice=org.springframework.aop.aspectj.AspectJMethodBeforeAdvice: advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect'""通知类型匹配对应的拦截器"}}

代码块7：MethodBeforeAdviceInterceptor()

创建前置通知拦截器对象

参数：advice=org.springframework.aop.aspectj.AspectJMethodBeforeAdvice: advice method [public void com.helloworld.aop.TestAspe…

package org.springframework.aop.framework.adapter;public class MethodBeforeAdviceInterceptor implements MethodInterceptor{public MethodBeforeAdviceInterceptor(MethodBeforeAdvice advice) { //advice=org.springframework.aop.aspectj.AspectJMethodBeforeAdvice: advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect';Assert.notNull(advice, "Advice must not be null"); //  advice=org.springframework.aop.aspectj.AspectJMethodBeforeAdvice: advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect'; this.advice = advice; //    this.advice=org.springframework.aop.aspectj.AspectJMethodBeforeAdvice: advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect'; "(7) 创建前置通知拦截器对象""this.advice=org.springframework.aop.aspectj.AspectJMethodBeforeAdvice: advice method [public void com.helloworld.aop.TestAspect.methodBefore(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect';"}}

小结：调用栈

下面执行userServiceImpl的save方法，首先获取userServiceImpl的通知

*DemoApplication.main()
*CglibAopProxy$DynamicAdvisedInterceptor.intercept()
*AdvisedSupport.getInterceptorsAndDynamicInterceptionAdvice()
*DefaultAdvisorChainFactory.getInterceptorsAndDynamicInterceptionAdvice()
*DefaultAdvisorAdapterRegistry.getInterceptors()
*MethodBeforeAdviceAdapter.getInterceptor()
*MethodBeforeAdviceInterceptor.MethodBeforeAdviceInterceptor()

调用methodBefore前置通知

将断点打到TestAspect.methodBefore方法,则代码执行过程如下

代码块8：intercept

继续进行

参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)

参数：args=com.helloworld.entity.UserInfo@2e9fda69,

package org.springframework.aop.framework;public class CglibAopProxy implements AopProxy{@Override@Nullablepublic Object intercept(Object proxy, Method method, Object[] args, MethodProxy methodProxy) throws Throwable { //method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo);args=com.helloworld.entity.UserInfo@2e9fda69,;Object oldProxy = null; //被暴露在threadLocal中旧的代理对象boolean setProxyContext = false; //用来标记代理对象是否被暴露在threadLocal中  setProxyContext=false; Object target = null; //目标对象TargetSource targetSource = this.advised.getTargetSource(); //目标类     targetSource=SingletonTargetSource for target object [com.helloworld.service.impl.UserServiceImpl@23aa363a]; try {if (this.advised.exposeProxy) {// Make invocation available if necessary.oldProxy = AopContext.setCurrentProxy(proxy); //将代理对象暴露出去setProxyContext = true; //将setProxyContext置为true}// Get as late as possible to minimize the time we "own" the target, in case it comes from a pool...target = targetSource.getTarget(); //目标对象可能源自一个池或者一个简单的方法Class<?> targetClass = (target != null ? target.getClass() : null); //?获取目标对象类型    targetClass=class com.helloworld.service.impl.UserServiceImpl; List<Object> chain = this.advised.getInterceptorsAndDynamicInterceptionAdvice(method, targetClass);"(2)"Object retVal;// Check whether we only have one InvokerInterceptor: that is,// no real advice, but just reflective invocation of the target.if (chain.isEmpty() && Modifier.isPublic(method.getModifiers())) {// We can skip creating a MethodInvocation: just invoke the target directly.// Note that the final invoker must be an InvokerInterceptor, so we know// it does nothing but a reflective operation on the target, and no hot// swapping or fancy proxying.Object[] argsToUse = AopProxyUtils.adaptArgumentsIfNecessary(method, args); //如果没有拦截器链，直接执行目标方法; ? ??? ???           // 拦截器链（每一个通知方法又被包装为方法拦截器，利用MethodInterceptor机制）retVal = methodProxy.invoke(target, argsToUse); //如果拦截器为空则直接执行目标方法}else {// We need to create a method invocation...retVal = new CglibMethodInvocation(proxy, target, method, args, targetClass, chain, methodProxy).proceed(); //封装拦截器链并执行"(8) 继续进行""封装拦截器链并执行"}retVal = processReturnType(proxy, target, method, retVal); //处理返回值类型return retVal;}finally {if (target != null && !targetSource.isStatic()) {targetSource.releaseTarget(target); //必须释放来自TargetSource中的目标对象}if (setProxyContext) {// Restore old proxy.AopContext.setCurrentProxy(oldProxy); //需要将旧的代理再放回到上线文中}}}}

代码块9：proceed

调用

package org.springframework.aop.framework;public class ReflectiveMethodInvocation implements ProxyMethodInvocation{@Override@Nullablepublic Object proceed() throws Throwable {//  We start with an index of -1 and increment early.if (this.currentInterceptorIndex == this.interceptorsAndDynamicMethodMatchers.size() - 1) {return invokeJoinpoint(); //直接调用目标方法}Object interceptorOrInterceptionAdvice = //     interceptorOrInterceptionAdvice=org.springframework.aop.interceptor.ExposeInvocationInterceptor@241e8ea6; this.interceptorsAndDynamicMethodMatchers.get(++this.currentInterceptorIndex);if (interceptorOrInterceptionAdvice instanceof InterceptorAndDynamicMethodMatcher) {// Evaluate dynamic method matcher here: static part will already have// been evaluated and found to match.InterceptorAndDynamicMethodMatcher dm =(InterceptorAndDynamicMethodMatcher) interceptorOrInterceptionAdvice;Class<?> targetClass = (this.targetClass != null ? this.targetClass : this.method.getDeclaringClass());if (dm.methodMatcher.matches(this.method, targetClass, this.arguments)) {return dm.interceptor.invoke(this); //比如 @After @Before 对应的增强器（拦截器）的方法比如 @After 对应的增强器 AspectJAfterAdvice 的invoke方法为：MethodInvocation.proceed();}else {// Dynamic matching failed.// Skip this interceptor and invoke the next in the chain.return proceed(); //如果动态匹配失败，则跳过该拦截器，执行下一个拦截器}}else {// It's an interceptor, so we just invoke it: The pointcut will have// been evaluated statically before this object was constructed.return ((MethodInterceptor) interceptorOrInterceptionAdvice).invoke(this); //It's an interceptor, so we just invoke it: The pointcut will havebeen evaluated statically before this object was constructed.普通的拦截器，直接调用即可"(9) 调用""It's an interceptor, so we just invoke it: The pointcut will havebeen evaluated statically before this object was constructed.普通的拦截器，直接调用即可"}}}

代码块10：invoke

继续进行

package org.springframework.aop.interceptor;public class ExposeInvocationInterceptor implements MethodInterceptor{@Overridepublic Object invoke(MethodInvocation mi) throws Throwable {MethodInvocation oldInvocation = invocation.get();invocation.set(mi); //将 mi 设置到 ThreadLocal 中try {return mi.proceed(); //执行目标方法"(10) 继续进行""执行目标方法"}finally {invocation.set(oldInvocation);}}}

代码块11：proceed

调用

package org.springframework.aop.framework;public class ReflectiveMethodInvocation implements ProxyMethodInvocation{@Override@Nullablepublic Object proceed() throws Throwable {//  We start with an index of -1 and increment early.if (this.currentInterceptorIndex == this.interceptorsAndDynamicMethodMatchers.size() - 1) {return invokeJoinpoint(); //直接调用目标方法}Object interceptorOrInterceptionAdvice = //     interceptorOrInterceptionAdvice=org.springframework.aop.aspectj.AspectJAfterAdvice: advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect'; this.interceptorsAndDynamicMethodMatchers.get(++this.currentInterceptorIndex);if (interceptorOrInterceptionAdvice instanceof InterceptorAndDynamicMethodMatcher) {// Evaluate dynamic method matcher here: static part will already have// been evaluated and found to match.InterceptorAndDynamicMethodMatcher dm =(InterceptorAndDynamicMethodMatcher) interceptorOrInterceptionAdvice;Class<?> targetClass = (this.targetClass != null ? this.targetClass : this.method.getDeclaringClass());if (dm.methodMatcher.matches(this.method, targetClass, this.arguments)) {return dm.interceptor.invoke(this); //比如 @After @Before 对应的增强器（拦截器）的方法比如 @After 对应的增强器 AspectJAfterAdvice 的invoke方法为：MethodInvocation.proceed();}else {// Dynamic matching failed.// Skip this interceptor and invoke the next in the chain.return proceed(); //如果动态匹配失败，则跳过该拦截器，执行下一个拦截器}}else {// It's an interceptor, so we just invoke it: The pointcut will have// been evaluated statically before this object was constructed.return ((MethodInterceptor) interceptorOrInterceptionAdvice).invoke(this); //It's an interceptor, so we just invoke it: The pointcut will havebeen evaluated statically before this object was constructed.普通的拦截器，直接调用即可"(11) 调用""It's an interceptor, so we just invoke it: The pointcut will havebeen evaluated statically before this object was constructed.普通的拦截器，直接调用即可"}}}

代码块12：invoke

继续进行

package org.springframework.aop.aspectj;public class AspectJAfterAdvice extends AbstractAspectJAdvice implements MethodInterceptor{@Overridepublic Object invoke(MethodInvocation mi) throws Throwable {try {return mi.proceed(); //执行目标方法"(12) 继续进行""执行目标方法"}finally {invokeAdviceMethod(getJoinPointMatch(), null, null); //执行增强方法}}}

代码块13：proceed

调用

package org.springframework.aop.framework;public class ReflectiveMethodInvocation implements ProxyMethodInvocation{@Override@Nullablepublic Object proceed() throws Throwable {//  We start with an index of -1 and increment early.if (this.currentInterceptorIndex == this.interceptorsAndDynamicMethodMatchers.size() - 1) {return invokeJoinpoint(); //直接调用目标方法}Object interceptorOrInterceptionAdvice =this.interceptorsAndDynamicMethodMatchers.get(++this.currentInterceptorIndex);if (interceptorOrInterceptionAdvice instanceof InterceptorAndDynamicMethodMatcher) {// Evaluate dynamic method matcher here: static part will already have// been evaluated and found to match.InterceptorAndDynamicMethodMatcher dm =(InterceptorAndDynamicMethodMatcher) interceptorOrInterceptionAdvice;Class<?> targetClass = (this.targetClass != null ? this.targetClass : this.method.getDeclaringClass());if (dm.methodMatcher.matches(this.method, targetClass, this.arguments)) {return dm.interceptor.invoke(this); //比如 @After @Before 对应的增强器（拦截器）的方法比如 @After 对应的增强器 AspectJAfterAdvice 的invoke方法为：MethodInvocation.proceed();}else {// Dynamic matching failed.// Skip this interceptor and invoke the next in the chain.return proceed(); //如果动态匹配失败，则跳过该拦截器，执行下一个拦截器}}else {// It's an interceptor, so we just invoke it: The pointcut will have// been evaluated statically before this object was constructed.return ((MethodInterceptor) interceptorOrInterceptionAdvice).invoke(this); //It's an interceptor, so we just invoke it: The pointcut will havebeen evaluated statically before this object was constructed.普通的拦截器，直接调用即可"(13) 调用""It's an interceptor, so we just invoke it: The pointcut will havebeen evaluated statically before this object was constructed.普通的拦截器，直接调用即可"}}}

代码块14：invoke

在此之前

package org.springframework.aop.framework.adapter;public class MethodBeforeAdviceInterceptor implements MethodInterceptor{@Overridepublic Object invoke(MethodInvocation mi) throws Throwable {this.advice.before(mi.getMethod(), mi.getArguments(), mi.getThis()); //执行拦截器before方法"(14) 在此之前""参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)""参数：args=com.helloworld.entity.UserInfo@2e9fda69,""执行拦截器before方法"return mi.proceed(); //执行目标方法}}

代码块15：before

调用通知方法

参数：method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo)

参数：args=com.helloworld.entity.UserInfo@2e9fda69,

package org.springframework.aop.aspectj;public class AspectJMethodBeforeAdvice extends AbstractAspectJAdvice implements MethodBeforeAdvice{@Overridepublic void before(Method method, Object[] args, @Nullable Object target) throws Throwable { //method=public void com.helloworld.service.impl.UserServiceImpl.save(com.helloworld.entity.UserInfo);args=com.helloworld.entity.UserInfo@2e9fda69,;invokeAdviceMethod(getJoinPointMatch(), null, null); //执行增强方法"(15) 调用通知方法""执行增强方法"}}

代码块16：invokeAdviceMethod

使用给定参数调用通知方法

package org.springframework.aop.aspectj;public class AbstractAspectJAdvice implements Advice{protected Object invokeAdviceMethod(@Nullable JoinPointMatch jpMatch, @Nullable Object returnValue, @Nullable Throwable ex)throws Throwable {return invokeAdviceMethodWithGivenArgs(argBinding(getJoinPoint(), jpMatch, returnValue, ex)); //执行参数绑定，然后使用参数调用通知方法"(16) 使用给定参数调用通知方法""参数：args=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo)),""执行参数绑定，然后使用参数调用通知方法"}}

代码块17：invokeAdviceMethodWithGivenArgs

方法之前

参数：args=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo)),

package org.springframework.aop.aspectj;public class AbstractAspectJAdvice implements Advice{protected Object invokeAdviceMethodWithGivenArgs(Object[] args) throws Throwable { //args=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo)),;Object[] actualArgs = args; //第一步： 获取参数  actualArgs=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo)),; if (this.aspectJAdviceMethod.getParameterCount() == 0) {actualArgs = null;}try {ReflectionUtils.makeAccessible(this.aspectJAdviceMethod); //使用反射，激活增强处理方法// TODO AopUtils.invokeJoinpointUsingReflectionreturn this.aspectJAdviceMethod.invoke(this.aspectInstanceFactory.getAspectInstance(), actualArgs); //TODO AopUtils.invokeJoinpointUsingReflection反射调用通知方法this.aspectInstanceFactory.getAspectInstance()获取的是切面的实例"(17) 方法之前""参数：joinPoint=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo))""TODO AopUtils.invokeJoinpointUsingReflection反射调用通知方法this.aspectInstanceFactory.getAspectInstance()获取的是切面的实例"}catch (IllegalArgumentException ex) {throw new AopInvocationException("Mismatch on arguments to advice method [" +this.aspectJAdviceMethod + "]; pointcut expression [" +this.pointcut.getPointcutExpression() + "]", ex);}catch (InvocationTargetException ex) {throw ex.getTargetException();}}}

代码块18：methodBefore

调用前置通知

参数：joinPoint=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo))

package com.helloworld.aop;public class TestAspect {@Before(value = "pointCut()")public void methodBefore(JoinPoint joinPoint) { //joinPoint=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo));String methodName = joinPoint.getSignature().getName(); //获取方法名称"(18) 调用前置通知""获取方法名称"System.out.println("执行目标方法【"+methodName+"】的<前置通知>,入参"+ Arrays.asList(joinPoint.getArgs()));}}

小结：调用栈

调用methodBefore前置通知

DemoApplication.main()
*CglibAopProxy$DynamicAdvisedInterceptor.intercept()
*ReflectiveMethodInvocation.proceed()
*ExposeInvocationInterceptor.invoke()
*ReflectiveMethodInvocation.proceed()
*AspectJAfterAdvice.invoke()
*ReflectiveMethodInvocation.proceed()
*MethodBeforeAdviceInterceptor.invoke()
*AspectJMethodBeforeAdvice.before()
*AbstractAspectJAdvice.invokeAdviceMethod()
*AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs()
*TestAspect.methodBefore()

调用连接点方法

将断点打到UserServiceImpl.save方法,则代码执行过程如下

代码块19：invoke

继续进行

package org.springframework.aop.framework.adapter;public class MethodBeforeAdviceInterceptor implements MethodInterceptor{@Overridepublic Object invoke(MethodInvocation mi) throws Throwable {this.advice.before(mi.getMethod(), mi.getArguments(), mi.getThis());"(14)"return mi.proceed(); //执行目标方法"(19) 继续进行""执行目标方法"}}

代码块20：proceed

调用连接点

package org.springframework.aop.framework;public class ReflectiveMethodInvocation implements ProxyMethodInvocation{@Override@Nullablepublic Object proceed() throws Throwable {//  We start with an index of -1 and increment early.if (this.currentInterceptorIndex == this.interceptorsAndDynamicMethodMatchers.size() - 1) {return invokeJoinpoint(); //直接调用目标方法"(20) 调用连接点""直接调用目标方法"}Object interceptorOrInterceptionAdvice =this.interceptorsAndDynamicMethodMatchers.get(++this.currentInterceptorIndex);if (interceptorOrInterceptionAdvice instanceof InterceptorAndDynamicMethodMatcher) {// Evaluate dynamic method matcher here: static part will already have// been evaluated and found to match.InterceptorAndDynamicMethodMatcher dm =(InterceptorAndDynamicMethodMatcher) interceptorOrInterceptionAdvice;Class<?> targetClass = (this.targetClass != null ? this.targetClass : this.method.getDeclaringClass());if (dm.methodMatcher.matches(this.method, targetClass, this.arguments)) {return dm.interceptor.invoke(this); //比如 @After @Before 对应的增强器（拦截器）的方法比如 @After 对应的增强器 AspectJAfterAdvice 的invoke方法为：MethodInvocation.proceed();}else {// Dynamic matching failed.// Skip this interceptor and invoke the next in the chain.return proceed(); //如果动态匹配失败，则跳过该拦截器，执行下一个拦截器}}else {// It's an interceptor, so we just invoke it: The pointcut will have// been evaluated statically before this object was constructed.return ((MethodInterceptor) interceptorOrInterceptionAdvice).invoke(this); //It's an interceptor, so we just invoke it: The pointcut will havebeen evaluated statically before this object was constructed.普通的拦截器，直接调用即可}}}

代码块21：invokeJoinpoint

调用

package org.springframework.aop.framework;public class CglibAopProxy implements AopProxy{@Overrideprotected Object invokeJoinpoint() throws Throwable {if (this.methodProxy != null) {return this.methodProxy.invoke(this.target, this.arguments);"(21) 调用"}else {return super.invokeJoinpoint();}}}

代码块22：invoke

保存

package org.springframework.cglib.proxy;public class MethodProxy {public Object invoke(Object obj, Object[] args) throws Throwable {try {init();FastClassInfo fci = fastClassInfo;return fci.f1.invoke(fci.i1, obj, args);"(22) 保存"}catch (InvocationTargetException ex) {throw ex.getTargetException();}catch (IllegalArgumentException ex) {if (fastClassInfo.i1 < 0) {throw new IllegalArgumentException("Protected method: " + sig1);}throw ex;}}}

代码块23：save

调用连接点方法

package com.helloworld.service.impl;public class UserServiceImpl implements UserService{@Overridepublic void save(UserInfo userInfo) {System.out.println("执行保存:"+userInfo.getName());"(23) 调用连接点方法"}}

小结：调用栈

调用连接点方法

DemoApplication.main()
CglibAopProxy$DynamicAdvisedInterceptor.intercept()
ReflectiveMethodInvocation.proceed()
ExposeInvocationInterceptor.invoke()
ReflectiveMethodInvocation.proceed()
AspectJAfterAdvice.invoke()
ReflectiveMethodInvocation.proceed()
*MethodBeforeAdviceInterceptor.invoke()
*ReflectiveMethodInvocation.proceed()
*CglibAopProxy$CglibMethodInvocation.invokeJoinpoint()
*MethodProxy.invoke()
*UserServiceImpl.save()

调用methodAfter后置通知

将断点打到TestAspect.methodAfter方法,则代码执行过程如下

代码块24：proceed

调用通知方法

package org.springframework.aop.framework;public class ReflectiveMethodInvocation implements ProxyMethodInvocation{@Override@Nullablepublic Object proceed() throws Throwable {//  We start with an index of -1 and increment early.if (this.currentInterceptorIndex == this.interceptorsAndDynamicMethodMatchers.size() - 1) {return invokeJoinpoint(); //直接调用目标方法}Object interceptorOrInterceptionAdvice = //     interceptorOrInterceptionAdvice=org.springframework.aop.aspectj.AspectJAfterAdvice: advice method [public void com.helloworld.aop.TestAspect.methodAfter(org.aspectj.lang.JoinPoint)]; aspect name 'testAspect'; this.interceptorsAndDynamicMethodMatchers.get(++this.currentInterceptorIndex);if (interceptorOrInterceptionAdvice instanceof InterceptorAndDynamicMethodMatcher) {// Evaluate dynamic method matcher here: static part will already have// been evaluated and found to match.InterceptorAndDynamicMethodMatcher dm =(InterceptorAndDynamicMethodMatcher) interceptorOrInterceptionAdvice;Class<?> targetClass = (this.targetClass != null ? this.targetClass : this.method.getDeclaringClass());if (dm.methodMatcher.matches(this.method, targetClass, this.arguments)) {return dm.interceptor.invoke(this); //比如 @After @Before 对应的增强器（拦截器）的方法比如 @After 对应的增强器 AspectJAfterAdvice 的invoke方法为：MethodInvocation.proceed();}else {// Dynamic matching failed.// Skip this interceptor and invoke the next in the chain.return proceed(); //如果动态匹配失败，则跳过该拦截器，执行下一个拦截器}}else {// It's an interceptor, so we just invoke it: The pointcut will have// been evaluated statically before this object was constructed.return ((MethodInterceptor) interceptorOrInterceptionAdvice).invoke(this); //It's an interceptor, so we just invoke it: The pointcut will havebeen evaluated statically before this object was constructed.普通的拦截器，直接调用即可"(24) 调用通知方法""It's an interceptor, so we just invoke it: The pointcut will havebeen evaluated statically before this object was constructed.普通的拦截器，直接调用即可"}}}

代码块25：invokeAdviceMethod

使用给定参数调用通知方法

package org.springframework.aop.aspectj;public class AbstractAspectJAdvice implements Advice{protected Object invokeAdviceMethod(@Nullable JoinPointMatch jpMatch, @Nullable Object returnValue, @Nullable Throwable ex)throws Throwable {return invokeAdviceMethodWithGivenArgs(argBinding(getJoinPoint(), jpMatch, returnValue, ex)); //执行参数绑定，然后使用参数调用通知方法"(25) 使用给定参数调用通知方法""参数：args=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo)),""执行参数绑定，然后使用参数调用通知方法"}}

代码块26：invokeAdviceMethodWithGivenArgs

方法之后

参数：args=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo)),

package org.springframework.aop.aspectj;public class AbstractAspectJAdvice implements Advice{protected Object invokeAdviceMethodWithGivenArgs(Object[] args) throws Throwable { //args=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo)),;Object[] actualArgs = args; //第一步： 获取参数  actualArgs=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo)),; if (this.aspectJAdviceMethod.getParameterCount() == 0) {actualArgs = null;}try {ReflectionUtils.makeAccessible(this.aspectJAdviceMethod); //使用反射，激活增强处理方法// TODO AopUtils.invokeJoinpointUsingReflectionreturn this.aspectJAdviceMethod.invoke(this.aspectInstanceFactory.getAspectInstance(), actualArgs); //TODO AopUtils.invokeJoinpointUsingReflection反射调用通知方法this.aspectInstanceFactory.getAspectInstance()获取的是切面的实例"(26) 方法之后""参数：joinPoint=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo))""TODO AopUtils.invokeJoinpointUsingReflection反射调用通知方法this.aspectInstanceFactory.getAspectInstance()获取的是切面的实例"}catch (IllegalArgumentException ex) {throw new AopInvocationException("Mismatch on arguments to advice method [" +this.aspectJAdviceMethod + "]; pointcut expression [" +this.pointcut.getPointcutExpression() + "]", ex);}catch (InvocationTargetException ex) {throw ex.getTargetException();}}}

代码块27：methodAfter

调用后置通知

参数：joinPoint=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo))

package com.helloworld.aop;public class TestAspect {@After(value = "pointCut()")public void methodAfter(JoinPoint joinPoint) { //joinPoint=execution(void com.helloworld.service.impl.UserServiceImpl.save(UserInfo));String methodName = joinPoint.getSignature().getName(); //获取方法名称"(27) 调用后置通知""获取方法名称"System.out.println("执行目标方法【"+methodName+"】的<后置通知>,入参"+Arrays.asList(joinPoint.getArgs()));}}

小结：调用栈

调用methodAfter后置通知

DemoApplication.main()
CglibAopProxy$DynamicAdvisedInterceptor.intercept()
ReflectiveMethodInvocation.proceed()
ExposeInvocationInterceptor.invoke()
*ReflectiveMethodInvocation.proceed()
*AbstractAspectJAdvice.invokeAdviceMethod()
*AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs()
*TestAspect.methodAfter()

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