Spring AOP——spring基于注解的AOP配置

XML：

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">
    
    <!--配置Spring创建容器时要扫描的包-->
    <context:component-scan base-package="com.fy"></context:component-scan>
    <!-- 配置spring开启注解AOP的支持-->
    <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
</beans>

package com.fy.utils;

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

@Component("logger")
@Aspect //表示当前类时一个切面类
public class logger {
    @Pointcut("execution(* com.fy.service.impl.*.*(..))")
    private void pt(){}
    @Before("pt()")
    public void beforePrintLog(){
        System.out.println("前置通知Logger中的beforePrintLog开始记录日志了。。。");
    }

    @AfterReturning("pt()")
    public void afterReturnPrintLog(){
        System.out.println("后置通知Logger中的afterReturnPrintLog开始记录日志了。。。");
    }

    @AfterThrowing("pt()")
    public void afterThrowingPrintLog(){
        System.out.println("异常通知Logger中的afterThrowingPrintLog开始记录日志了。。。");
    }

    @After("pt()")
    public void afterPrintLog(){
        System.out.println("最终通知Logger中的afterPrintLog开始记录日志了。。。");
    }

   // @Around("pt()")
    public Object aroundPrintLog(ProceedingJoinPoint pjp){
         Object rtValue = null;
        try{
            Object[] args = pjp.getArgs();//得到方法执行所需的参数
            System.out.println("前置通知");
            rtValue = pjp.proceed(args);//明确调用业务层方法(切入点方法)
            System.out.println("后置通知");
            return rtValue;
        }catch (Throwable t){
            System.out.println("异常通知");
            throw new RuntimeException(t);
        }finally {
            System.out.println("最终通知");
        }
    }
}

测试类：

package com.fy.test;

import com.fy.service.AccountService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class AOPTest {
    public static void main(String[] args) {
         ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
        AccountService as = (AccountService)ac.getBean("accountService");
        as.saveAccount();
    }
}

普通通知结果：

环绕通知结果：

两者结果有差异是因为Spring设定了普通通知的顺序