AOP面向切面编程

<?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"
       xmlns:p="http://www.springframework.org/schema/p"
       xsi:schemaLocation="http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
 http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
 http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd
">
    <!-- 自动扫报 -->
    <context:component-scan base-package="com.song"/>
    <!-- 代理对象 -->
    <aop:aspectj-autoproxy/>
</beans>

package com.song.dao;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.stereotype.Component;

import java.util.Arrays;
@Component
@Aspect
public class LoggerAspect {
    @Before("execution(public int com.song.dao.CalImpl.*(..))")
    public void before(JoinPoint joinPoint){
        //获取方法名字
        String name = joinPoint.getSignature().getName();
        //获取参数
        String args = Arrays.toString(joinPoint.getArgs());
        System.out.println(name+"参数是"+args);
    }
    @After(value = "execution(public int com.song.dao.CalImpl.* (..))")
    public void after(JoinPoint joinPoint){
        //获取⽅法名
        String name = joinPoint.getSignature().getName();
        System.out.println(name+"⽅法执⾏完毕");
    }
    @AfterReturning(value = "execution(public int com.song.dao.CalImpl.* (..))",returning = "result")
    public void after1(JoinPoint joinPoint, Object result){
        String name = joinPoint.getSignature().getName();
        System.out.println(name+"的结果是"+result);
    }
    @AfterThrowing(value = "execution(public int com.song.dao.CalImpl.*(..))",throwing = "exception")
    public void afterThrowing(JoinPoint joinPoint,Exception exception){
        //获取⽅法名
        String name = joinPoint.getSignature().getName();
        System.out.println(name+"⽅法抛出异常："+exception);
    }
}

package com.song.dao;

import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;

@Component

public class CalImpl implements Cal{
    public int add(int num1, int num2) {
        int result = num1+num2;
        return result;
    }
    public int sub(int num1, int num2) {
        int result = num1-num2;
        return result;
    }
    public int mul(int num1, int num2) {
        int result = num1*num2;
        return result;
    }
    public int div(int num1, int num2) {
        int result = num1/num2;
        return result;
    }
}

package com.song.dao;

public interface Cal {
    public int add(int num1,int num2);
    public int sub(int num1,int num2);
    public int mul(int num1,int num2);
    public int div(int num1,int num2);
}

import com.song.dao.Cal;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class testAop {
    @Test
    public void test(){
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("aop.xml");
        Cal calImpl =(Cal) applicationContext.getBean("calImpl");
        calImpl.add(1,1);
        calImpl.sub(134,2);
        calImpl.div(10,2);
        calImpl.mul(1,3);
    }
}

搜索

复制