通过注解配置

<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" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
 <!--  扫描指定包下面的注解  -->
<context:component-scan base-package="com"/>
 <!--  开启使用注解完成织入  -->
<aop:aspectj-autoproxy/>
</beans>

@Component
@Aspect  //代表这个类是一个通知类
public class MyAdvice {

	@Pointcut("execution(* com.spring.aop.annotation.*ServiceImpl.*(..))") //切入点，匹配被切的类文件
	public void pc(){
	}
	
	@Before("MyAdvice.pc()")
	public void before(){
		System.out.println("前置通知");
	}
	
	@Around("MyAdvice.pc()")
	public Object around(ProceedingJoinPoint jp) throws Throwable{ //不放行方法就拦截掉了
		System.out.println("环绕通知  前部分");
		
		Object result = jp.proceed();//调用目标方法
		
		System.out.println("环绕通知  后部分");
		return result;
	}
	
	@AfterThrowing("MyAdvice.pc()")
	public void afterException(){
		System.out.println("异常拦截通知");
	}
	
	@After("MyAdvice.pc()")
	public void after(){
		System.out.println("后置通知--目标方法发生异常，还会执行");
	}
	
	@AfterReturning("MyAdvice.pc()")
	public void afterReturn(){
		System.out.println("后置通知  方法发生异常，不会执行");
	}
}