spring剖面(aspect)配置

1、切面类定义

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package login.aop;

import org.aspectj.lang.JoinPoint;


public class AspectTest  {
	//该方法中可加参数也可不加，如果加了第一个时切入点
	public void before(JoinPoint joinPoint){
		//获得拦截的类
		String className = joinPoint.getClass().getName();
		//获得拦截的方法
		String methodName = joinPoint.getSignature().getName();
		//joinPoint.getSourceLocation().
		
		System.out.println("before-----------"+className+"   "+methodName);
	}
	public void after(){
		System.out.println("after-----------");
	}
}

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?2、配置bean.xml

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<bean id="userAdvice" class="login.aop.AspectTest">
	</bean>
	
	<aop:config>
		<aop:aspect id="userAspect" ref="userAdvice">
			<aop:pointcut id="myMethod"
                      expression="execution(public * login.service.impl.*.*(..))" />
            <aop:before method="before" pointcut-ref="myMethod"/>
            <aop:after-returning method="after" pointcut-ref="myMethod"/>			
		</aop:aspect>
	</aop:config>

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expression是匹配的方法特征，aop:before/after-returning必须与定义的切面类中的方法名一致， 注意xml的命名空间引用

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<beans
	xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:tx="http://www.springframework.org/schema/tx"
	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.xsd  
	http://www.springframework.org/schema/tx  
	http://www.springframework.org/schema/tx/spring-tx-2.5.xsd  
	http://www.springframework.org/schema/aop  
	http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"
>

?3、测试类

package login.test;

import login.service.UserService;

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

public class MyAsp {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		ApplicationContext context = new ClassPathXmlApplicationContext("beans3.xml");
		UserService service = (UserService) context.getBean("userService");
		service.list();
		service.login("ligson", "admin");
		//service.login("ligson", null);
	}

}

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4、常用切入点表达式总结