spring_aop的简单应用

spring_aop的简单应用（加日志）

首先创建三个需要加日志的类和方法

package com.service;

public class ServiceA {
	public void addAccount(String account){
		System.out.println("添加账户 in ServiceA:"+account);
	}
}
package com.service;

public class ServiceB {
	public String deposite(int money){
		System.out.println("存款 in ServiceB:"+money);
		return "some value returned by deposite in ServiceB";
	}
}
package com.service;

public class ServiceC {
	public void withdraw(int money){
		System.out.println("取款 in ServiceC:"+money);
	}
}

在创建一个类 写追加的通知 按照aop分为前置后置以及环绕

package com.service;

import org.aspectj.lang.ProceedingJoinPoint;

public class AopInterceptor {
	
	public void before(){
		System.out.println("我是一个前置通知！！！！！");
	}
	
	public void after(){
		System.out.println("我是一个后置通知！！！！！");
	}
	
	public void around(ProceedingJoinPoint point){
		try {
			System.out.println("环绕通知开始！！！");
			Object retval = point.proceed();//执行方法

			String name = point.getSignature().getName();//获取当前执行的切入点的方法名
			System.out.println("方法名："+name);
			
			Object[] args = point.getArgs();//获取参数
			System.out.println("参数："+args[0]);
			
			System.out.println("环绕通知返回结果："+retval);
			System.out.println("环绕通知结束！！！");
		} catch (Throwable e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

xml文件的配置

<?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">

<bean id="serviceA" class="com.service.ServiceA"></bean>
<bean id="serviceB" class="com.service.ServiceB"></bean>
<bean id="serviceC" class="com.service.ServiceC"></bean>
<bean id="aopInterceptor" class="com.service.AopInterceptor"></bean>

<aop:config>
	<!-- 切入点表达式，匹配出的所有方法组成一个切面 -->
	<aop:pointcut expression="execution(* com.service.Service*.*(..))" id="allMethod"/>
	<aop:pointcut expression="execution(* com.service.ServiceA.*(..))" id="serviceAMethod"/>
	
	<!-- 建立切面和通知的联系   ref指向通知 -->
	<aop:aspect ref="aopInterceptor">
		<!-- 配置前置通知   method:通知模块中的一个方法（通知）   pointcut-ref:切入点表达式-->
		<!-- <aop:before method="before" pointcut-ref="allMethod"/>
		<aop:after method="after" pointcut-ref="serviceAMethod"/> -->
		
		<!-- 环绕通知 -->
		<aop:around method="around" pointcut-ref="allMethod"/>
		
	</aop:aspect>

</aop:config>

</beans>

测试

package com.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.service.ServiceA;
import com.service.ServiceB;

public class Test {
	public static void main(String[] args) {
		ApplicationContext context = new ClassPathXmlApplicationContext("aop.xml");
		ServiceA serviceA = context.getBean("serviceA",ServiceA.class);
		serviceA.addAccount("10000");
		ServiceB serviceB = context.getBean("serviceB",ServiceB.class);
		serviceB.deposite(1000);
	}
}

结果