<?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"       xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">    <!-- 激活组件扫描功能,在包cn.ysh.studio.spring.aop及其子包下面自动扫描通过注解配置的组件 -->    <context:component-scan base-package="com.zhiguoguo.service,aspect"/>    <!-- 激活自动代理功能 -->    <aop:aspectj-autoproxy proxy-target-class="true"/></beans>

package com.zhiguoguo.service;import org.springframework.stereotype.Component;@Componentpublic class HelloService {    public String sayHello() {        System.out.println("——————方法执行——————");//        throw new RuntimeException("haha");        return "Hello world!";    }}

package com.zhiguoguo.aspect;import org.aspectj.lang.ProceedingJoinPoint;import org.aspectj.lang.annotation.*;import org.springframework.stereotype.Component;/** * 定义切面 */@Component@Aspectpublic class HelloServiceAspect {    @Before("execution(* com.zhiguoguo.service.HelloService.*(..))")    public void authorith(){        System.out.println("模拟进行权限检查。");    }    @After("execution(* com.zhiguoguo.service.HelloService.*(..))")    public void release() {        System.out.println("模拟方法结束后的释放资源...");        System.out.println();    }    @AfterReturning(returning="obj", pointcut="execution(* com.zhiguoguo.service.HelloService.*(..))")    public void log(Object obj) {        System.out.println("模拟目标方法返回值：" + obj);        System.out.println("模拟记录日志功能...");        System.out.println();    }    @AfterThrowing(throwing="ex", pointcut="execution(* com.zhiguoguo.service.HelloService.*(..))")    public void doRecoverActions(Throwable ex) {        System.out.println("目标方法中抛出的异常：" + ex);        System.out.println("模拟抛出异常后的增强处理...");    }//    @Around("execution(* com.zhiguoguo.service.HelloService.*(..))")//这里先注释掉    public Object processTx(ProceedingJoinPoint jp) throws java.lang.Throwable {        System.out.println("执行目标方法之前，模拟开始事物...");        // 执行目标方法，并保存目标方法执行后的返回值        Object rvt = jp.proceed();        //这里的切面方法如果有参数才能传递一个参数给他//        Object rvt = jp.proceed(new String[]{"被改变的参数"});        System.out.println("执行目标方法之前，模拟结束事物...");        System.out.println();        //经过这么一个环绕，可以增强返回值        return rvt + "新增的内容";    }}

package main;import com.zhiguoguo.service.HelloService;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class HelloApp {    public static void main(String[] args) {        ApplicationContext context = new ClassPathXmlApplicationContext("spring-config.xml");        HelloService helloService = context.getBean(HelloService.class);        helloService.sayHello();    }}