Spring3.0的AOP基于Annotation AOP基于XML

首先搭建环境，

既然使用Annotation和AOP，第一步需要在.xml的配置文件中配置命名空间:我看了2.5的视频结合百度，配不好xml文件，最后发现官网上非常清楚，需要什么就在官网上看什么

  

<?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: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-3.0.xsd
         http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
         http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context-3.0.xsd">
   <strong> <context:annotation-config />
	<context:component-scan base-package="com.bjsxt"/>
	 
  	<aop:aspectj-autoproxy /> </strong>

</beans>

切面文件：这里要明白切面的一些标记及语法

@Aspect
@Component
public class LogInterceptor {
	<strong>@Pointcut("execution(public * com.bjsxt.service..*.add(..))")</strong>
	public void myMethod(){};
	 
	<strong>@Before("myMethod()")</strong>
	public void before() {
		System.out.println("method before");
	} 
	<strong>@Around("myMethod()")</strong>
	public void aroundMethod(ProceedingJoinPoint pjp) throws Throwable {
		System.out.println("method around start");
		pjp.proceed();
		System.out.println("method around end");
	}
}

使用XML下的AOP

切面文件：将球面的注解去掉

@Aspect
@Component
public class LogInterceptor {
	//@Pointcut("execution(public * com.bjsxt.service..*.add(..))")
	public void myMethod(){};
	 
	//@Before("myMethod()")
	public void before() {
		System.out.println("method before");
	} 
	//@Around("myMethod()")
	public void aroundMethod(ProceedingJoinPoint pjp) throws Throwable {
		System.out.println("method around start");
		pjp.proceed();
		System.out.println("method around end");
	}
}

.xml配置文件

<beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     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-3.0.xsd
         http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
         http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context-3.0.xsd">
   <context:annotation-config />
	<context:component-scan base-package="com.bjsxt"/>
	<bean id="logInterceptor" class="com.bjsxt.aop.LogInterceptor"></bean>
	<aop:config>
		<aop:aspect id="logAspect" ref="logInterceptor">
			<aop:before method="before" pointcut="execution(public * com.bjsxt.service..*.add(..))" />
		</aop:aspect>
	</aop:config>
</beans>

对于Annotation和xml配置的AOP来说，显然XML配置的AOP重要一些。对于别人项目中的类的注解不可见的情况下，只需要配置文件即可实现切面编程.