AspectJ 基于注解的实现前置通知

痛定思痛。 2022-06-18 12:11 198阅读 0赞

#### Spring环境下AspectJ 基于注解的实现前置通知   所需jar：[http://pan.baidu.com/s/1qXH1Mnq][http_pan.baidu.com_s_1qXH1Mnq] ####

## 接口 ##

package com.hk.spring.annotation;
    
    public interface ISomeService {
        public void doFirst();
        public void doSecond();
        public String doThird();
    
    }

## 接口实现 ##

package com.hk.spring.annotation;
    
    public class ISomeServiceImpl implements ISomeService { 
    
        @Override
        public void doFirst() {
            System.out.println("主业务逻辑doFirst执行");
        }
    
        @Override
        public void doSecond() {
            System.out.println("主业务逻辑doSecond执行");
    
        }
    
        @Override
        public String doThird() {
            System.out.println("主业务逻辑doThird执行");
            return "ABC";
    
        }
    
    }

## 切面类 ##

package com.hk.spring.annotation;
    
    import org.aspectj.lang.annotation.Aspect;
    import org.aspectj.lang.annotation.Before;
    
    /** * 定义一个简单的POJO类作为切面 * @author 浪丶荡 * */
    @Aspect     //表示当前类为切面
    public class MyAspect { 
    
        @Before("execution(* *..ISomeService.doFirst(..))")     //表示前置通知的切入点表达式
        public void before(){
            System.out.println("前置方法");
        }
    }

## 配置 ##

<?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">
            
            <bean id="someService" class="com.hk.spring.annotation.ISomeServiceImpl"></bean>
            
            <bean id="myAspect" class="com.hk.spring.annotation.MyAspect"></bean>
            
            <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
    </beans>

## 测试 ##

package com.hk.spring.annotation;
    
    
    import org.junit.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class Mytest {
    
        @Test
        public void test1(){
            String resoure = "com/hk/spring/annotation/applicationContext.xml";
            ApplicationContext ac = new ClassPathXmlApplicationContext(resoure);
            ISomeService service = (ISomeService) ac.getBean("someService");
            service.doFirst();
            service.doSecond();
            service.doThird();
    
        }
    }

## 结果 ##

前置方法
    主业务逻辑doFirst执行
    主业务逻辑doSecond执行
    主业务逻辑doThird执行

[http_pan.baidu.com_s_1qXH1Mnq]: http://pan.baidu.com/s/1qXH1Mnq