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
@Aspectpublic 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.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsdhttp://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 {@Testpublic void testaop(){ApplicationContext context=new ClassPathXmlApplicationContext("bean.xml");User user=context.getBean("user111",User.class);user.add();}
}

运行结果如下