Spring之AOP Annotation模式

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 {@Overridepublic void addUser() {// TODO Auto-generated method stubSystem.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;@Aspectpublic 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.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"><bean id="userDao" /><bean id="aspectj" name="code">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 stubApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");UserDao dao=(UserDao)context.getBean("userDao");dao.addUser();}}

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