spring基于注解的AOP配置

xml文件

<?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:aop="http://www.springframework.org/schema/aop"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">

        <!--spring基于注解的AOP配置-->
        <!--配置spring创建容器时要扫描的包-->
        <context:component-scan base-package="com.itheima"></context:component-scan>

        <!--配置spring开启注解AOP的支持-->
        <aop:aspectj-autoproxy></aop:aspectj-autoproxy>

</beans>

切面类

package com.itheima.utils;

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

/**
 * @Author: lijiahao
 * @Description: 用于记录日志的工具类，里面提供了公共的代码
 * @Data: Create in 18:45 2020/2/8
 * @Modified By:
 */
@Component("Logger")
@Aspect//表示当前类是一个切面类
public class Logger {

    @Pointcut("execution(* com.itheima.service.impl.*.*(..))")//设置切入点
    private void pt1(){

    }
    //前置通知
    @Before("pt1()")
    public void beforePrintLog(){
        System.out.println("Logger类中的beforeprintlog方法执行了。。。");
    }
    //后置通知
    @AfterReturning("pt1()")
    public void afterReturningPrintLog(){
        System.out.println("Logger类中的afterReturningPrintLog方法执行了。。。");
    }
    //异常通知
    @AfterThrowing("pt1()")
    public void afterThrowingPrintLog(){
        System.out.println("Logger类中的afterThrowingPrintLog方法执行了。。。");
    }
    //最终通知
    @After("pt1()")
    public void afterPrintLog(){
        System.out.println("Logger类中的afterPrintLog方法执行了。。。");
    }


    //环绕通知
    @Around("pt1()")
    public Object aroundPrintLog(ProceedingJoinPoint proceedingJoinPoint){
        Object rtValue = null;
        try {
            Object []args = proceedingJoinPoint.getArgs();//得到方法执行所需的参数
            System.out.println("Logger类中的aroundPrintLog方法执行了。。。前置");
            rtValue = proceedingJoinPoint.proceed();//明确调用业务层方法（切入点方法）
            System.out.println("Logger类中的aroundPrintLog方法执行了。。。后置");
            return rtValue;
        } catch (Throwable throwable) {
            System.out.println("Logger类中的aroundPrintLog方法执行了。。。异常");
            throw new RuntimeException(throwable);
        } finally {
            System.out.println("Logger类中的aroundPrintLog方法执行了。。。最终");
        }
    }
}

service接口

package com.itheima.service;

/**
 * @Author: lijiahao
 * @Description:账户的业务层接口
 * @Data: Create in 18:42 2020/2/8
 * @Modified By:
 */
public interface IAccountService {

    //模拟保存账户
    void saveAccount();

    //模拟更新账户
    void updateAccount(int i);

    //删除账户
    int deleteAccount();
}

service实现类

package com.itheima.service.impl;

import com.itheima.service.IAccountService;
import org.springframework.stereotype.Service;

/**
 * @Author: lijiahao
 * @Description:
 * @Data: Create in 18:44 2020/2/8
 * @Modified By:
 */
@Service("accountService")
public class AccountServiceImpl implements IAccountService {
    public void saveAccount() {
        System.out.println("执行了保存。。。");

        //int i=1/0;
    }

    public void updateAccount(int i) {
        System.out.println("执行了更新。。。"+i);
    }

    public int deleteAccount() {
        System.out.println("执行了删除。。。");
        return 0;
    }
}

测试类

package com.itheima.test;

import com.itheima.service.IAccountService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * @Author: lijiahao
 * @Description: 测试aop的配置
 * @Data: Create in 19:17 2020/2/8
 * @Modified By:
 */
public class AOPTest {
    public static void main(String[] args) {
        //1.获取容器
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("bean.xml");
        //2.获取对象
        IAccountService accountService = (IAccountService) applicationContext.getBean("accountService");
        //3.执行方法
        accountService.saveAccount();
    }
}