手撕Spring5框架（七）基于XML配置文件方式实现AOP具体操作

素颜马尾好姑娘i 2022-12-03 13:23 171阅读 0赞

1.  创建类，被增强类和增强类

package org.learn.spring5.service;
    
    public interface UserService {
        void add();
        void del();
        void update();
        void query();
    }

package org.learn.spring5.service.impl;
    
    import org.learn.spring5.service.UserService;
    
    
     public class UserServiceImpl implements UserService {
    
        public void add() {
            //int i=10/0;
            System.out.println("add");
        }
        public void del() {
            System.out.println("del");
        }
    
        public void update() {
            System.out.println("update");
        }
    
        public void query() {
            System.out.println("query");
        }
    }

package org.learn.spring5.service.impl;
    
    import org.aspectj.lang.ProceedingJoinPoint;
    
    //增强类，编写增强的方法
    
    public class UserServiceProxy {
        public void before(){
        System.out.println("before");
    }
        public void after(){
        System.out.println("After");
    }
        public void afterReturning(){
            System.out.println("afterReturning");
        }
        public void afterThrowing(){
            System.out.println("AfterThrowing");
        }
        public void around(ProceedingJoinPoint proceedingJoinPoint){
            System.out.println("环绕之前");
            try {
                proceedingJoinPoint.proceed();
            } catch (Throwable throwable) {
                throwable.printStackTrace();
            }
            System.out.println("环绕之后");
        }
    
    }

2. 配置XML文件 bean1.xml

1）创建对象

2）配置AOP部分

<?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 http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
    
        
    
        
        <bean id="userServiceImpl" class="org.learn.spring5.service.impl.UserServiceImpl"></bean>
        <bean id="userServiceProxy" class="org.learn.spring5.service.impl.UserServiceProxy"></bean>
    
        
        <aop:config>
            
            <aop:pointcut id="p" expression="execution(* org.learn.spring5.service.impl.UserServiceImpl.add(..))"/>
            
            <aop:aspect ref="userServiceProxy">
                <aop:before method="before" pointcut-ref="p"/>
                <aop:after method="after" pointcut-ref="p"/>
                <aop:after-returning method="afterReturning" pointcut-ref="p"/>
                <aop:after-throwing method="afterThrowing" pointcut-ref="p"/>
                <aop:around method="around" pointcut-ref="p"/>
            </aop:aspect>
        </aop:config>
    
    </beans>

3. 编写测试类

import org.junit.Test;
    import org.learn.spring5.service.UserService;
    import org.learn.spring5.service.impl.UserServiceImpl;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class TestSpring5 {
    
        /**
         * Spring AOP实现 基于XML方式
         */
        @Test
        public void test1(){
            ApplicationContext context = new ClassPathXmlApplicationContext("bean1.xml");
            UserService userService = context.getBean("userServiceImpl", UserService.class);
            userService.add();
        }
    
    }