Spring之AOP Annotation方式

业务接口

package dao;
public interface UserDao {
	public void addUser();
}

接口实现

package dao;
public class UserDaoImpl implements UserDao {
	@Override
	public void addUser() {
		// TODO Auto-generated method stub
		System.out.println("添加用户");
	}
}

代理类

package aspect;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
@Aspect
public class UserDaoAspect { //类中开发切入点和各种通知
	
    @Pointcut("execution(* dao..*.*(..))")   //切入点    签名就是下面的方法名
	public void sayHello(){};
	
	@Before("sayHello()")       //前置通知
	public void startSay(){
		System.out.println("Good Morning");
	}
	@AfterReturning("sayHello()")   //后置通知
	public void endSay(){
		System.out.println("bye bye");
	}
	@AfterThrowing("sayHello()")    //异常通知
	public void doThrows(){
		System.out.println("异常通知");
	}
	@After("sayHello()")       //后通知
	public void doFinally(){
		System.out.println("最终执行");
	}
}

applicationContext.xml

<?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:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">
	
	<bean id="userDao" class="dao.UserDaoImpl" />
	
	<bean id="aspectj" class="aspect.UserDaoAspect"></bean>
	
	<aop:aspectj-autoproxy/>
</beans>

测试类

package test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import dao.UserDao;
import dao.UserDaoImpl;
public class Test {
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
		UserDao dao=(UserDao)context.getBean("userDao");
		dao.addUser();
	}
}