package logan.study.aop.impl;

public interface ArithmeticCalculator {

    int add(int i, int j);

    int sub(int i, int j);

    int mul(int i, int j);

    int div(int i, int j);

}

package logan.study.aop.impl;

import org.springframework.stereotype.Component;

@Component

public class ArithmeticCalculatorImpl implements ArithmeticCalculator {

    @Override

    public int add(int i, int j) {

        // TODO Auto-generated method stub

        int result = i + j;

        return result;

    }

    @Override

    public int sub(int i, int j) {

        // TODO Auto-generated method stub

        int result = i - j;

        return result;

    }

    @Override

    public int mul(int i, int j) {

        // TODO Auto-generated method stub

        int result = i * j;

        return result;

    }

    @Override

    public int div(int i, int j) {

        // TODO Auto-generated method stub

        int result = i / j;

        return result;

    }

}

package logan.study.aop.impl;

import java.util.Arrays;

import java.util.List;

import org.aspectj.lang.JoinPoint;

import org.aspectj.lang.annotation.After;

import org.aspectj.lang.annotation.Aspect;

import org.aspectj.lang.annotation.Before;

import org.springframework.stereotype.Component;

//把这个类声明为一个切面：需要把该类放入到IOC容器中，在声明为一个切面

@Aspect

@Component

public class LoggingAspect {

    //声明该方法时一个前置通知：在目标方法开始之前执行

    @Before("execution(public int logan.study.aop.impl.ArithmeticCalculator.*(int, int))")

    public void beforeMethod(JoinPoint joinPoint){

        String methodName = joinPoint.getSignature().getName();

        List<Object> args = Arrays.asList(joinPoint.getArgs());

        System.out.println("The method "+ methodName +" begins with "+args);

    }

    //后置通知，在目标方法执行之后执行（无论该方法是否出现异常）

    //在后置通知中，还不能访问目标方法执行的结果，执行结果在返回通知中可以访问

    @After("execution(public int logan.study.aop.impl.ArithmeticCalculator.*(int, int))")

    public void afterMethod(JoinPoint joinPoint){

        String methodName = joinPoint.getSignature().getName();

        List<Object> args = Arrays.asList(joinPoint.getArgs());

        System.out.println("The method "+ methodName +" ends with "+args);

    }

}

<?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-4.3.xsd

        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">

    <context:component-scan base-package="logan.study.aop.impl"></context:component-scan>

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

</beans>

package logan.study.aop.impl;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Main {

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        //1.创建Spring的IOC容器

        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");

        //2.从IOC容器里面获取bean实例

        ArithmeticCalculator arithmeticCalculator = ctx.getBean(ArithmeticCalculator.class);

        //使用Bean

        int result = arithmeticCalculator.add(3, 6);

        System.out.println(result);

        result = arithmeticCalculator.div(3, 6);

        System.out.println(result);

    }

}

五月 27, 2017 5:46:24 下午 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh

信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@49c2faae: startup date [Sat May 27 17:46:24 CST 2017]; root of context hierarchy

五月 27, 2017 5:46:24 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions

信息: Loading XML bean definitions from class path resource [applicationContext.xml]

The method add begins with [3, 6]

The method add ends with [3, 6]

9

The method div begins with [3, 6]

The method div ends with [3, 6]

0