首先引入jar包

aspectjrt.jar

aspectjweaver.jar

1、dao

package com.dao;public interface OkpDao {	public void save();	public void update();}

2、impl

package com.dao.impl;import org.springframework.context.annotation.Scope;import org.springframework.stereotype.Component;import com.dao.OkpDao;@Component("okpDaoImpl")public class OkpDaoImpl implements OkpDao{		public void save() {		System.out.println("OkpDaoImpl.save()");	}	public void update() {		System.out.println("OkpDaoImpl.update()");			}}

3、service

package com.service;import javax.annotation.PostConstruct;import javax.annotation.PreDestroy;import javax.annotation.Resource;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.factory.annotation.Qualifier;import org.springframework.stereotype.Component;import com.dao.OkpDao;@Componentpublic class OkpService {	private OkpDao okpDao;	public OkpDao getOkpDao() {		return okpDao;	}	@Resource(name="okpDaoImpl")	public void setOkpDao(OkpDao okpDao) {		this.okpDao = okpDao;	}	public void save(){		this.okpDao.save();	}	public void update(){		this.okpDao.update();	}	@PostConstruct	public void init(){				System.out.println("容器创建前执行");	}		@PreDestroy	public void destory(){		System.out.println("容器销毁后执行");	}}

　4、切面类

package com.service;import org.aspectj.lang.annotation.After;import org.aspectj.lang.annotation.AfterReturning;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Before;import org.aspectj.lang.annotation.Pointcut;import org.springframework.stereotype.Component;@Aspect@Componentpublic class SaveInter {		@Pointcut("execution(* com.service.OkpService.*(..))")	public void method(){};		@Before("method()")	public void before(){		System.out.println("前置通知");	}	@AfterReturning("method()")  	public void doAfter(){  		System.out.println("后置通知");  	}  	@After("method()")	public void after(){		System.out.println("最终通知");	}}

@Aspect切面类

@Component 将该类加载到spring容器

@Poincut 定义一个切面

@Before 当执行切面中的方法前，会执行

@AfterReturning 方法执行完执行

@After 相当于方法中的try{}catch{}finally{}中的finally,执行完方法前会执行　

　5、测试类

package com.service;import org.junit.Test;import org.springframework.beans.factory.BeanFactory;import org.springframework.context.support.ClassPathXmlApplicationContext;public class OkpServiceTest {	@Test	public void testSave() {		BeanFactory bf=new ClassPathXmlApplicationContext("applicationContext.xml");		OkpService okp=(OkpService) bf.getBean("okpService");		okp.save();		okp.update();	}}

　　6、配置文件

 　　使用Aop注解，xml配置文件中要加入<aop:aspectj-autoproxy></aop:aspectj-autoproxy>

运行结果：

log4j:WARN No appenders could be found for logger (org.springframework.context.support.ClassPathXmlApplicationContext).

log4j:WARN Please initialize the log4j system properly.

容器创建前执行

前置通知

OkpDaoImpl.save()

最终通知

后置通知

前置通知

OkpDaoImpl.update()

最终通知

后置通知