AOP实现方式2——通过AspectJ提供的注解实现AOP

1.Runable接口

package com.animal;/** * Created by kenneth on 2017/4/6. */public interface Runable {    void run();}

2.Runable接口的实现类Dog

package com.animal;/** * Created by kenneth on 2017/4/6. */public class Dog implements Runable {    @Override    public void run() {        System.out.println("小狗在跑");    }}

3.Spring注解对bean的方法进行拦截器

package com.animal;import org.aspectj.lang.annotation.AfterReturning;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Before;import org.aspectj.lang.annotation.Pointcut;/** * Created by kenneth on 2017/4/6. */@Aspectpublic class RunHelper {    @Pointcut("execution(* com.animal.Dog.*(..))")    public void runMethod() {    }    @Before("runMethod()")    public void beforeRun() {        System.out.println("跑前要热身");    }    @AfterReturning("runMethod()")    public void afterRun() {        System.out.println("跑完要喝水");    }}

4.Spring配置文件

<?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: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/aop        http://www.springframework.org/schema/aop/spring-aop.xsd">    <!--启用Aspect对Annotation的支持-->    <aop:aspectj-autoproxy/>    <bean id="dog" class="com.animal.Dog"/>    <bean id="runHelper" class="com.animal.RunHelper"/></beans>

5.测试类

package com.animal;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;/** * Created by kenneth on 2017/4/6. */public class Test {    public static void main(String[] args) {        ApplicationContext context = new ClassPathXmlApplicationContext("ApplicationContext.xml");        Runable dog = (Runable) context.getBean("dog");        dog.run();    }}

6.测试结果：

四月 06, 2017 1:33:21 下午 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@533ddba: startup date [Thu Apr 06 13:33:21 CST 2017]; root of context hierarchy
四月 06, 2017 1:33:21 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [ApplicationContext.xml]
跑前要热身
小狗在跑
跑完要喝水