一、创建需要增强的类User

package com.Spring5.AOP;

import org.springframework.stereotype.Component;

@Component(value = "user111")
public class User {
    public void add(){
        System.out.println("add ... .. ...");
    }
}

二、创建增强类（编写增强逻辑）

package com.Spring5.AOP;

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

@Component
@Aspect

public class UserProxy {

    @Before(value = "execution(* com.Spring5.AOP.User.add())")
    public void bf(){
        System.out.println("前置通知 ... .. .. ");
    }

    @AfterReturning(value = "execution(* com.Spring5.AOP.User.add())")
    public void af(){
        System.out.println("后置通知 ... .. .. ");
    }

    @Around(value = "execution(* com.Spring5.AOP.User.add())")
    public void hr(ProceedingJoinPoint p) throws Throwable{
        System.out.println("环绕通知前 ... .. .. ");
        p.proceed();
        System.out.println("环绕通知后 ... .. .. ");
    }

    @AfterThrowing(value = "execution(* com.Spring5.AOP.User.add())")
    public void aft(){
        System.out.println("异常通知  ... .. .. ");
    }

    @After(value = "execution(* com.Spring5.AOP.User.add())")
    public void fina(){
        System.out.println("最终通知 ... .. .. ");
    }
}

三、进行通知的配置(需要在配置文件中引入context和aop命名空间)

1、在Spring配置文件中开启注解扫描

<context:component-scan base-package="com.Spring5.AOP"></context:component-scan>

2、使用注解创建增强类和被增强类的对象

利用@Component

3、在增强类上方添加@Aspect

@Aspect用来表示这是一个增强类

4、在Spring配置中生成对象

<aop:aspectj-autoproxy></aop:aspectj-autoproxy>

四、配置不同类型的通知

1、在通知类里作为通知的方法上面添加通知类型注解，使用切入点表达式配置

• 前置通知 @Before
• 后置通知 @AfterReturning
• 环绕通知 @Around
• 异常通知 @AfterThrowing
• 最终通知 @After
• 切入点表达时示例@Before(value = "execution(* com.Spring5.AOP.User.add())")，具体写法在上一篇文章有提到

五、测试

xml配置文件如下

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                            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">
    <context:component-scan base-package="com.Spring5.AOP"></context:component-scan>
    <aop:aspectj-autoproxy></aop:aspectj-autoproxy>

</beans>

测试类如下

package com.Spring5.TestSpring;

import com.Spring5.AOP.User;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestAOP {
    @Test
    public void testaop(){
        ApplicationContext context=new ClassPathXmlApplicationContext("bean.xml");
        User user=context.getBean("user111",User.class);
        user.add();
    }
}

运行结果如下