SpringAOP的注解形式

article/2025/9/14 9:36:51

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上一篇讲了配置文件形式的SpringAOP：Spring中的AOP以及切入点表达式和各种通知

本篇继续看一下注解形式怎么去理解和应用AOP

前几篇已经讲了不少AOP相关的知识，本篇不再赘述，直接用代码写一下注解形式的AOP

举的例子还是前几篇的例子，只不过是用注解的形式去用一下AOP

package com.cj.study.spring.aop.annotation;public interface PersonService {public String savePerson();public void updatePerson();public void deletePerson();}

package com.cj.study.spring.aop.annotation;import org.springframework.stereotype.Repository;//目标类
@Repository("personService")
public class PersonServiceImpl implements PersonService{//目标方法public String savePerson() {System.out.println("添加");return "保存成功！";}//目标方法public void updatePerson() {System.out.println("修改");}//目标方法public void deletePerson() {System.out.println("删除");}}

package com.cj.study.spring.aop.annotation;import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;/****  @Aspect + @Pointcut()这两个注解就相当于之前配置文件里下边的内容*  <aop:config>*		<aop:pointcut expression="execution(* com.cj.study.spring.aop.*.*(..))" id="perform"/>*  </aop:config>*  *  @Before()这个注解就相当于之前配置文件里*  <aop:aspect ref="myTransaction">*		<aop:before method="beginTransaction" pointcut-ref="perform"/>*	</aop:aspect>*  * @author caoju**/
//切面类
@Component("myTransaction")
@Aspect
public class MyTransaction {//这个 aaa() 方法没有其他作用，仅仅是用它来标明一下切入点表达式@Pointcut("execution(* com.cj.study.spring.aop..*.*(..))")public void aaa(){}//切面里的通知方法@Before("aaa()")public void beginTransaction(){System.out.println("开启事务 ");}//切面里的通知方法@After("aaa()")public void commit(){System.out.println("提交事务");}}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-4.2.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-2.5.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-2.5.xsd"><!-- 配置包扫描器，把目标类和切面类纳入到spring容器中管理 --><context:component-scan base-package="com.cj.study.spring.aop.annotation" />	<!-- 启动aop的注解解析器 --><aop:aspectj-autoproxy></aop:aspectj-autoproxy></beans>

package com.cj.study.spring.aop.annotation;import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;public class AopAnnodationTest {@Testpublic void test(){ApplicationContext context = new ClassPathXmlApplicationContext("com/cj/study/spring/aop/annotation/applicationContext.xml");PersonService proxyPersonService = (PersonService) context.getBean("personService");String returnValue = proxyPersonService.savePerson();System.out.println(returnValue);}
}

打断点看下返回的是否是代理类