spring aop

annotation aop

package com.fh.aop.log;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.stereotype.Component;

@Component
@Aspect
public class LogAnnotation {
    @Pointcut(value = "execution(* com.fh.aop.service.impl.UserServiceImpl.*(..))")
    public void pointcut(){}

    @Before(value = "pointcut()")
    public void beforeMethod() {
        System.out.println("before method");
    }

    @After("pointcut()")
    public void afterMethod() {
        System.out.println("after method");
    }

    @Around("pointcut()")
    public Object aroundMethod(ProceedingJoinPoint pd) throws Throwable {
        System.out.println("环绕前");
        Object proceed = pd.proceed();
        System.out.println("环绕后");
        return proceed;
    }

    @AfterReturning(value = "pointcut()",returning = "returnVal")
    public Object afterMethodReturning(JoinPoint joinPoint,Object returnVal) {
        System.out.println("【我是返回后通知】");
        return  "我是返回后通知";
    }

    @AfterThrowing("pointcut()")
    public void afterMethodEX(){
        System.out.println("我是异常通知");
    }
}

<!--开启注解支持-->
<aop:aspectj-autoproxy/>

xml版

<bean id="userService" class="com.fh.aop.service.impl.UserServiceImpl"/>
<bean id="log2" class="com.fh.aop.log.Log2"/>

  <!--方式二、自定义来实现aop-->
<aop:config>
    <aop:aspect ref="log2">
        <aop:pointcut id="pointcut"
                      expression="execution(* com.fh.aop.service.impl.UserServiceImpl.*(..))"/>

        <aop:before method="beforeMethod" pointcut-ref="pointcut"/>
        <aop:after method="afterMethod" pointcut-ref="pointcut"/>
    </aop:aspect>
</aop:config>

<bean id="userService" class="com.fh.aop.service.impl.UserServiceImpl"/>
<bean id="log" class="com.fh.aop.log.BeforeLog"/>
<bean id="afterLog" class="com.fh.aop.log.AfterLog"/> <!--class AfterLog implements AfterReturningAdvice-->

<!--方式一、spring api接口实现-->
<aop:config>
    <aop:pointcut id="point"
                  expression="execution(* com.fh.aop.service.impl.UserServiceImpl.*(..))"/>
    <aop:advisor advice-ref="log" pointcut-ref="point"/>
    <aop:advisor advice-ref="afterLog" pointcut-ref="point"/>
</aop:config>

@Test
public void m4(){
    ApplicationContext applicationContext = new ClassPathXmlApplicationContext("bean3.xml");
    UserService userService = applicationContext.getBean("userService", UserService.class);
    userService.add();
}