javaEE Spring，AOP，注解代替xml配置AOP

MyAdvice.java（通知对象类,增强对象类）：

package cn.xxx.annotationaop;

import org.aspectj.lang.ProceedingJoinPoint;
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;

//通知类 (增强类)
@Aspect
//表示该类是一个通知类
public class MyAdvice {
	@Pointcut("execution(* cn.xxx.service.*ServiceImpl.*(..))")
	//专门管理切入点 (抽取切点表达式)
	public void pc(){}
	
	//前置通知
	//指定该方法是前置通知,并制定切入点
	@Before("MyAdvice.pc()")
	//@Before("execution(* cn.xxx.service.*ServiceImpl.*(..))")
	public void before(){
		System.out.println("这是前置通知!!");
	}
	
	//后置通知 (发生异常,不会调用)
	@AfterReturning("MyAdvice.pc()")
	//@AfterReturning("execution(* cn.xxx.service.*ServiceImpl.*(..))")
	public void afterReturning(){
		System.out.println("这是后置通知(如果出现异常不会调用)!!");
	}
	
	//环绕通知
	@Around("execution(* cn.xxx.service.*ServiceImpl.*(..))")
	public Object around(ProceedingJoinPoint pjp) throws Throwable {
		System.out.println("这是环绕通知之前的部分!!");
		Object proceed = pjp.proceed(); //调用目标方法
		System.out.println("这是环绕通知之后的部分!!");
		return proceed;
	}
	
	//异常通知
	@AfterThrowing("execution(* cn.xxx.service.*ServiceImpl.*(..))")
	public void afterException(){
		System.out.println("出现异常了!!");
	}
	
	//最终通知 (发生异常,也会调用)
	@After("execution(* cn.xxx.service.*ServiceImpl.*(..))")
	public void after(){
		System.out.println("这是最终通知(出现异常也会调用)!!");
	}
}

src/applicationContext.xml（Spring配置文件，配置通过注解完成织入）：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd ">

	<!-- 准备工作: 导入aop(约束)命名空间   xmlns:aop="http://www.springframework.org/schema/aop" -->
	<!-- 1.配置目标对象 -->
	<bean name="userService" class="cn.xxx.service.UserServiceImpl" ></bean>
	
	<!-- 2.配置通知对象 -->
	<bean name="myAdvice" class="cn.xxx.annotationaop.MyAdvice" ></bean>
	
	<!-- 3.通过注解完成织入 -->
	<aop:aspectj-autoproxy></aop:aspectj-autoproxy>

</beans>

Test.java（测试类）：

package cn.xxx.annotationaop;

import javax.annotation.Resource;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import cn.xxx.service.UserService;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class Test {
	@Resource(name="userService")
	private UserService us;
	
	@Test
	public void fun1(){
		us.save();
	}
	
}