Spring中基于Schema的AOP配置

本文用于知识点的简单总结。

对于Spring中AOP的配置,一种方式是基于Schema,也就是在xml文件中进行配置,相关配置项在aop命名空间下定义。以下主要通过代码说明基本配置流程。

(1)定义需要实现的业务接口:
package com.aop.service;

public interface MyService {
    
    public void sayHello(String word);
    
}

(2)编写实现接口的业务类:
package com.aop.service;

public class MyServiceImpl implements MyService {

    @Override
    public void sayHello(String word) {
	System.out.println("Say :" + word);
    }

}

(3)定义切面支持类,包含所需的通知方法:
package com.aop.aspect;

import org.aspectj.lang.JoinPoint;

public class MyAspect {
    //前置通知
    public void beforeAdvice(JoinPoint joinPoint) {
	System.out.println("--before advice,参数:" + joinPoint.getArgs()[0]);
    }

    //后置最终通知   
    public void afterFinallyAdvice() {
	System.out.println("------after finally advice");
    }
}

(4)beans.xml配置文件:
<?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: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-3.0.xsd">

	<!-- 接口实现业务类 -->
	<bean id="MyService" class="com.aop.service.MyServiceImpl" />
	
	<!-- 切面支持类,包含所需的通知方法 -->
	<bean id="aspect" class="com.aop.aspect.MyAspect" />
	
	<aop:config>
		<!-- 切点配置,匹配com.aop.service包及子包下的任何方法执行 -->
		<aop:pointcut id="pointcut" expression="execution(* com.aop.service..*.*(..))" />
		<!-- 切面配置, ref 属性用来引用切面支持类 -->
		<aop:aspect ref="aspect">
			<!-- 前置通知,pointcut-ref 引用切点配置bean,method指定通知方法 -->
			<aop:before pointcut-ref="pointcut" method="beforeAdvice" />
			<aop:after pointcut-ref="pointcut" method="afterFinallyAdvice" />
		</aop:aspect>
	</aop:config>

</beans> 

(5)测试类:
package com.spring.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
import com.aop.service.MyService;

public class TestAop {

    public static void main(String[] args) {
	
	ApplicationContext context = new FileSystemXmlApplicationContext("aopBeans.xml");	
	MyService service = (MyService) context.getBean("MyService");
	
	service.sayHello("Spring aop");
    }
}

(6)输出结果:
--before advice,参数:Spring aop
Say :Spring aop
------after finally advice

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转载自wuyaweiwude.iteye.com/blog/1631344