基于XML配置的AOP

不用基于注解的方式,改用基于xml配置AOP的方式.

beans09.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">

    
    
    <bean class="com.elf.spring.aop.xml.SmartAnimalAspect" id="smartAnimalAspect"/>
    
    <bean class="com.elf.spring.aop.xml.SmartDog" id="smartDog"/>
    
    <aop:config>
        
        <aop:pointcut id="myPointCut" expression="execution(public float com.elf.spring.aop.xml.SmartDog.getSum(float, float)))"/>
        
        <aop:aspect ref="smartAnimalAspect" order="10">
            
            <aop:before method="showBeginLog" pointcut-ref="myPointCut"/>
            
            <aop:after-returning method="showSuccessEndLog" pointcut-ref="myPointCut" returning="res"/>
            
            <aop:after-throwing method="showExceptionLog" pointcut-ref="myPointCut" throwing="throwable"/>
            
            <aop:after method="showFinallyEndLog" pointcut-ref="myPointCut"/>
            
            
        aop:aspect>
    aop:config>
beans>

package com.elf v.spring.aop.xml;
import org.junit.jupiter.api.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
 * @author 45
 * @version 1.0
 */
public class AopAspectjXMLTest {
    @Test
    public void testAspectByXML() {

        ApplicationContext ioc = new ClassPathXmlApplicationContext("beans09.xml");
        SmartAnimalable smartAnimalable =
                ioc.getBean(SmartAnimalable.class);

        smartAnimalable.getSum(10, 2);
    }
}

package com.elf.spring.aop.xml;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;

import java.util.Arrays;

/**
 * @author 45
 * @version 1.0
 *
 * 这是我们开发一个切面类, 但是不用注解，而是使用XML配置
 */
public class SmartAnimalAspect {


    public void showBeginLog(JoinPoint joinPoint) {
        //通过连接点对象joinPoint 可以获取方法签名
        Signature signature = joinPoint.getSignature();
        System.out.println("SmartAnimalAspect-XML配置-切面类showBeginLog()[使用的myPointCut()]-方法执行前-日志-方法名-" + signature.getName() + "-参数 "
                + Arrays.asList(joinPoint.getArgs()));
    }

    public void showSuccessEndLog(JoinPoint joinPoint, Object res) {
        Signature signature = joinPoint.getSignature();
        System.out.println("SmartAnimalAspect-XML配置-切面类showSuccessEndLog()-方法执行正常结束-日志-方法名-" + signature.getName() + " 返回的结果是=" + res);
    }


    public void showExceptionLog(JoinPoint joinPoint, Throwable throwable) {
        Signature signature = joinPoint.getSignature();
        System.out.println("SmartAnimalAspect-XML配置-切面类showExceptionLog()-方法执行异常-日志-方法名-" + signature.getName() + " 异常信息=" + throwable);
    }

    public void showFinallyEndLog(JoinPoint joinPoint) {
        Signature signature = joinPoint.getSignature();
        System.out.println("SmartAnimalAspect-XML配置-切面类showFinallyEndLog()-方法最终执行完毕-日志-方法名-" + signature.getName());
    }
}

package com.elf.spring.aop.xml;

/**
 * @author 45
 * @version 1.0
 * 接口
 */
public interface SmartAnimalable {
    //求和
    float getSum(float i, float j);
    //求差
    float getSub(float i, float j);
}

package com.elf.spring.aop.xml;
/**
 * @author 45
 * @version 1.0
 */
//@Component //使用@Component 当spring容器启动时，将 SmartDog注入到容器
public class SmartDog implements SmartAnimalable {
    @Override
    public float getSum(float i, float j) {
        float result = i + j;
        //result = 1 / 0; //模拟一个算术异常
        System.out.println("方法内部打印result = " + result);
        return result;
    }

    @Override
    public float getSub(float i, float j) {
        float result = i - j;
        System.out.println("方法内部打印result = " + result);
        return result;
    }
}