aop注解實現

• • spring配置文件
  • 目標接口，目標實現類，切面類 注解寫法
  • 使用spring-test測試

spring配置文件

<?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 http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"><!-- spring 組件掃描 --><context:component-scan base-package="com.lovely.aop.anno"/><!-- aop 自動代理測試 --><aop:aspectj-autoproxy/></beans>

目標接口，目標實現類，切面類 注解寫法

package com.lovely.aop.anno;public interface TargetInterface {public abstract void save(); } package com.lovely.aop.anno;import org.springframework.stereotype.Component;/*** @author echo lovely* @date 2020/8/5 17:35*/@Component("target") public class Target implements TargetInterface {public void save() {/*try {System.out.println(1 / 0);} catch (Exception e) {System.out.println(e);}*/System.out.println("save running about aop...");} }

• 聲明切面并進行織入

package com.lovely.aop.anno;import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.*; import org.springframework.stereotype.Component;/*** @author echo lovely*/ @Component("myAspect") @Aspect // 標注當前類是切面類 public class MyAspect {// 配置前置通知@Before(value = "execution(* com.lovely.aop.anno.*.*(..))")public void before() {System.out.println("前置增強...");}public void afterReturning() {System.out.println("后置增強...");}// @Around("execution(* com.lovely.aop.anno.*.*(..))")@Around("MyAspect.myPoint()")public Object around(ProceedingJoinPoint process) {System.out.println("環繞通知前...");Object obj = null;try {obj = process.proceed();} catch (Throwable throwable) {throwable.printStackTrace();}System.out.println("環繞通知后...");return obj;}public void afterThrowing() {System.out.println("異常拉...");}// 后置增強// @After("execution(* com.lovely.aop.anno.Target.*(..))")@After("myPoint()")public void after() {System.out.println("最終通知...");}// aop注解 抽取切點表達式@Pointcut("execution(* com.lovely.aop.anno.Target.*(..))")public void myPoint() {}}

使用spring-test測試

import com.lovely.aop.anno.TargetInterface; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;/*** @author echo lovely* @date 2020/8/5 17:48*/ @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration("classpath:applicationContextAnno.xml") public class AopAnnotationTest {@Autowiredprivate TargetInterface target;@Testpublic void test1() {target.save();}} 創作挑戰賽新人創作獎勵來咯，堅持創作打卡瓜分現金大獎

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