package com.atguigu.spring.aop.impl.panpan;public interface ArithmeticCalculator {    //创建一个接口，其是抽象的类，不能实例化    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 com.atguigu.spring.aop.impl.panpan;import org.springframework.stereotype.Component;public class ArithmeticCalculatorImpl implements ArithmeticCalculator {    @Override    public int add(int i, int j) {        int result=i+j;        return result;    }    @Override    public int sub(int i, int j) {        int result=i-j;        return result;    }    @Override    public int mul(int i, int j) {        int result=i*j;        return result;    }    @Override    public int div(int i, int j) {        int result=i/j;        return result;    }}

package com.atguigu.spring.aop.impl.panpan;import java.util.Arrays;import org.aspectj.lang.JoinPoint;import org.aspectj.lang.ProceedingJoinPoint;public class ArithmeticCalculatorLoggingProxy {        //前置通知的方法，在xml文件中可以通过method这个属性获取该方法的方法名，joinPoint是切点，    public void beforeMethod(JoinPoint joinPoint){        //获取方法名，和参数值，参数值要多个，所以用数组集合的方法        String methodName=joinPoint.getSignature().getName();        Object[] args=joinPoint.getArgs();                System.out.println("The method "+methodName+" begains "+Arrays.asList(args));    }        //后置通知的方法    public void afterMethod(JoinPoint joinPoint){        //获取方法名，和参数值        String methodName=joinPoint.getSignature().getName();        System.out.println("The method "+methodName+ " ends");    }        //返回通知的方法    public void afterReturning(JoinPoint joinPoint,Object result){        //获取方法名，和参数值        String methodName=joinPoint.getSignature().getName();        System.out.println("The method "+methodName+ " *** ends :"+result);    }        //异常通知的方法    public void afterThrowing(JoinPoint joinPoint, Exception e){        String methodName=joinPoint.getSignature().getName();        System.out.println("The method "+methodName+ " Exception :"+ e);    }        //环绕通知的    public Object aroundMethod(ProceedingJoinPoint pjp){        Object result=null;        //获取方法名        String methodName=pjp.getSignature().getName();        try {            //前置通知,Arrays.asList(pjp.getArgs())为该方法的参数个数，为数组集合            System.out.println("The method "+methodName+" begains "+Arrays.asList(pjp.getArgs()));                        //执行目标方法            result=pjp.proceed();                        //返回通知            System.out.println("The method "+methodName+ "  ends with :"+result);                    } catch (Throwable e) {            //异常通知            System.out.println("The method " +methodName+ " occurs exception "+ e);            e.printStackTrace();        }        //后置通知        System.out.println("The method " + methodName + " ends");        return result;    }}

<!-- 配置bean ,全类名是继承接口类的全类名--><bean id="arithmeticCalculator"         class="com.atguigu.spring.aop.impl.panpan.ArithmeticCalculatorImpl"></bean>            <!-- 配置切面的bean ,全类名是实现切面编程的类全类名-->        <bean id="arithmeticCalculatorLoggingProxy"     class="com.atguigu.spring.aop.impl.panpan.ArithmeticCalculatorLoggingProxy"></bean>        <!-- 配置AOP -->    <aop:config>        <!-- 配置切点表达式,全类名为接口的全类名 -->        <aop:pointcut expression="execution(* com.atguigu.spring.aop.impl.panpan.ArithmeticCalculator.*(int,int))"         id="pointcut"/>                <!-- 配置切面及通知 method中的为方法名，-->        <aop:aspect ref="arithmeticCalculatorLoggingProxy" order="1">            <aop:before method="beforeMethod" pointcut-ref="pointcut"/>            <aop:after method="afterMethod" pointcut-ref="pointcut"/>            <aop:after-throwing method="afterThrowing" pointcut-ref="pointcut" throwing="e"/>            <aop:after-returning method="afterReturning" pointcut-ref="pointcut" returning="result"/>            <aop:around method="afterMethod" pointcut-ref="pointcut" />        </aop:aspect>    </aop:config>

ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext.test.xml");//ArithmeticCalculator,是一个接口类,注解的是继承该接口的类ArithmeticCalculator impl=(ArithmeticCalculator) ctx.getBean("arithmeticCalculator");        System.out.println(impl.getClass().getName());        int result=impl.add(12,2);System.out.println(result);        double result2=impl.div(12, 2);System.out.println(result2);