定义Aspect

@Aspect
@Slf4j
public class myaspect {

    @Pointcut("execution(* site.yalong.controller..*.*(..))")
    public void webLog() {
    }

    @Before("webLog()")
    public void doBefore(JoinPoint joinPoint) throws Throwable {
        // 接收到请求，记录请求内容
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        if (attributes != null) {
            HttpServletRequest request = attributes.getRequest();
            // 记录下请求内容
            System.out.println("in");
            log.info("\n\n有人访问了:{}\nARGS :{}\n", request.getRequestURL().toString(), Arrays.toString(joinPoint.getArgs()));
        }

    }

    @AfterReturning(returning = "object", pointcut = "webLog()")
    public void doAfterReturning(Object object) throws Throwable {
        // 处理完请求，返回内容
        log.info("RESPONSE : " + object);
    }
}

开启aop支持

 <aop:aspectj-autoproxy proxy-target-class="true"/>

问题出现,定义的Aspect并不起作用

分析:
Spring与SpringMVC是2个不同的父子容器， @Aspect如果被spring容器加载的话，而@Controller注解的这些类的实例化以及注入却是由SpringMVC来完成。 @Aspect如果被spring容器加载的时候，可能Spring MVC容器还未初始化， Controller类还未初始化，所以无法正常织入。

解决方案: 把 aop:aspectj-autoproxy 移入springmvc配置文件中，并定义bean

<?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:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       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/mvc
        https://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd">
    <!--1.注解驱动-->
    <mvc:annotation-driven/>

    <!--2.静态资源处理器-->
    <mvc:default-servlet-handler/>

    <!--3.扫描包:controller-->
    <context:component-scan base-package="site.yalong.controller"/>

    <!--    &lt;!&ndash;4.视图解析器&ndash;&gt;-->
    <!--    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">-->
    <!--        <property name="prefix" value="/WEB-INF/jsp/"/>-->
    <!--        <property name="suffix" value=".jsp"/>-->
    <!--    </bean>-->
    
    <!--开启aop,这个配置一定要配置在component-scan以后,并且让mvc注入aspect的bean-->
    <aop:aspectj-autoproxy proxy-target-class="true"/>
    <bean class="site.yalong.aspect.myaspect"/>
</beans>