自定义类实现AOP

HeJin小于 1 分钟Spring全家桶Spring入门

自定义类实现AOP

DiyPointCut.java

package com.kuang.diy;

/**
 * @author Administrator
 */
public class DiyPointCut {

    public void before(){
        System.out.println("========方法执行前============");
    }

    public void after(){
        System.out.println("========方法执行后============");
    }

}

xml配置

<?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"
       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">

    <!--注册bean-->
    <bean id="userService" class="com.kuang.service.UserServiceImpl"/>
    <bean id="log" class="com.kuang.log.Log"/>
    <bean id="afterLog" class="com.kuang.log.AfterLog"/>

    <!--方式二、自定义来实现AOP-->
    <bean id="diy" class="com.kuang.diy.DiyPointCut"/>
    <aop:config>
        <!--自定义切面, ref 要引用的类-->
        <aop:aspect ref="diy">
        <!--切入点-->
            <aop:pointcut id="pointcut" expression="execution(* com.kuang.service.UserServiceImpl.*(..))"/>
        <!--通知-->
            <aop:before method="before" pointcut-ref="pointcut"/>
            <aop:after method="after" pointcut-ref="pointcut"/>
        </aop:aspect>
    </aop:config>

</beans>

测试类

import com.kuang.service.UserService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MyTest {
    public static void main(String[] args) {

        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        /**
         * 动态代理,代理的是接口
         */
        UserService userService = context.getBean("userService", UserService.class);

        userService.add();
        userService.select();

    }
}

结果

========方法执行前============
增加了一个用户
========方法执行后============
========方法执行前============
查询了一个用户
========方法执行后============