Spring之AOP Annotation方式详解编程语言

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(); 
	} 
 
}