25.基于XML的AOP实现

基于XML的AOP实现

主要是使用XML去代替注解，来实现起到代替注解的作用，实际使用频率很低

除了@Component注解，将里面其他的注解都注释掉

spring-aop-xml.xml

<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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">

    
    <context:component-scan base-package="com.atguigu.spring.proxy"/>

    <aop:config>
        
        <aop:pointcut id="testPointCut" expression="execution(* com.atguigu.spring.proxy.CalculatorImpl.*(..))"/>

        
        <aop:aspect ref="loggerAspect" order="1">
            
            <aop:before method="beforeAdviceMethod" pointcut-ref="testPointCut"/>
            <aop:after-returning method="afterReturningMethod" returning="result" pointcut-ref="testPointCut"/>
            <aop:after-throwing method="afterThrowingMethod" throwing="ex" pointcut-ref="testPointCut"/>
            <aop:around method="aroundMethod" pointcut-ref="testPointCut"/>
        aop:aspect>

    aop:config>
beans>

SpringTest.java

    @Test
    public void testAOPByXML(){
        ApplicationContext ioc = new ClassPathXmlApplicationContext("spring-aop-xml.xml");
        Calculator calculator = ioc.getBean(Calculator.class);
        calculator.div(1,1);
    }

Logger-->前置通知，方法名：div，参数：[1, 1]
环绕通知-->前置通知，方法名：div，参数：[1, 1]
方法内部 result = 1
环绕通知-->返回通知，方法名：div，结果：1
环绕通知-->后置通知，方法名：div
Logger-->返回通知，方法名：div，结果：1