package cn.happy.day01.entity;

/**

 * 1.业务接口

 * @author Happy

 *

 */

public interface ISomeService {

    //1.1  执行事务

   public void doTransaction();

    //1.2 书写日志

   public String doLog();

}

package cn.happy.day01.entity;

public class SomeServiceImpl implements ISomeService {

    @Override

    public void doTransaction() {

        System.out.println("开启事务");

    }

    @Override

    public String doLog() {

        System.out.println("书写日志");

        return "abc";

    }

}

package cn.happy.day01.aop;

import org.aspectj.lang.annotation.Aspect;

import org.aspectj.lang.annotation.Before;

@Aspect  //该类为切面

public class MyAspect {

    //前置通知

    @Before(value="execution(public * *(..))")

    public void myBefore(){

        System.out.println("这是前置增强");

    }

}

<?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:context="http://www.springframework.org/schema/context"

    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/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">

   <!-- 目标对象 -->

   <bean id="someService" class="cn.happy.day01.entity.SomeServiceImpl"></bean>

   <!-- 切面： -->

   <bean id="myAspect" class="cn.happy.day01.aop.MyAspect"></bean>

  <aop:aspectj-autoproxy/>

</beans>

package cn.happy.day01.test;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import org.springframework.test.context.ContextConfiguration;

import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import cn.happy.day01.entity.ISomeService;

public class Spring_01Test {

    @Test

    public void testOne(){

        ApplicationContext ctx=new ClassPathXmlApplicationContext("cn/happy/day01/applicationContext.xml");

        ISomeService service = (ISomeService)ctx.getBean("someService");

        service.doTransaction();

        String result = service.doLog();

        System.out.println(result);

    }

}