spring开发_Annotation_AOP_Before增强处理

项目结构：

http://www.cnblogs.com/hongten/gallery/image/112691.html

在此项目中除了要引入基本springjar包：

spring.jar和commons-logging.jar

还需要引入：

aspectjweaver.jar

aspectjrt.jar

两个jar包！！！

/spring_2000_aop_annotation/src/com/b510/app/test/SpringTest.java

package com.b510.app.test;

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

import com.b510.service.AnimalService;

/**
 * 测试类
 * 
 * @author Hongten
 * 
 */
public class SpringTest {

    public static void main(String[] args) {
        ApplicationContext act = new ClassPathXmlApplicationContext("beans.xml");
        AnimalService cat = (AnimalService) act.getBean("cat");
        // 调用printResult()方法
        cat.printResult();
        // 调用printHobby()方法
        cat.printHobby();
    }
}

/spring_2000_aop_annotation/src/com/b510/aspect/MyBeforeAdvice.java

package com.b510.aspect;

import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;

/**
 * 定义一个Before增强处理类
 * 
 * @author Hongten
 * 
 */
// 定义切面
@Aspect
public class MyBeforeAdvice {

    private int i = 0;

    /**
     * 搜索com.b510.service.impl包下的所有类及其类的方法，作为本方法的切入点(Jionpoint)
*/
    @Before("execution(* com.b510.service.impl.*.*(..))")
    public void getVisits() {
        System.out.println("自定义切面MyBeforeAdvice类的getVisits()方法的执行此数为" + (++i));
    }
}

/spring_2000_aop_annotation/src/com/b510/service/AnimalService.java

package com.b510.service;

/**
 * 定义动物接口
 * 
 * @author Hongten
 * 
 */
public interface AnimalService {
    /**
     * 打印信息
*/
    public void printResult();

    /**
     * 打印兴趣爱好
*/
    public void printHobby();
}

/spring_2000_aop_annotation/src/com/b510/service/impl/CatServiceBean.java

package com.b510.service.impl;

import org.springframework.stereotype.Component;

import com.b510.service.AnimalService;
/**
 * 定义一个动物的实现类CatServiceBean
 * @author Hongten
 *
 */
@Component
public class CatServiceBean implements AnimalService {

    /**
     * 名字
*/
    private String name;
    /**
     * 兴趣爱好
*/
    private String hobby;

    public String getHobby() {
        return hobby;
    }

    public String getName() {
        return name;
    }

    @Override
    public void printHobby() {
        System.out.println("我的兴趣爱好是" + getHobby());
    }

    @Override
    public void printResult() {
        System.out.println("大家好，我是" + getName());
    }

    public void setHobby(String hobby) {
        this.hobby = hobby;
    }

    public void setName(String name) {
        this.name = name;
    }
}

/spring_2000_aop_annotation/src/beans.xml

要添加：

xmlns:aop="http://www.springframework.org/schema/aop"

http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd

请看下面：

<?xml version="1.0" encoding="GBK"?>
<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/context
    http://www.springframework.org/schema/context/spring-context-3.0.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
    <context:component-scan base-package="com.b510.aspect,com.b510.service">
        <context:include-filter type="annotation"
            expression="org.aspectj.lang.annotation.Aspect" />
    </context:component-scan>
    <!-- 启动@AspectJ支持 -->
    <aop:aspectj-autoproxy />
    <!--
        不适用spring的XML Shemale配置方式，可以采用如下配置 : <bean
        class="org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator"/>
    -->

    <bean id="cat" class="com.b510.service.impl.CatServiceBean">
        <property name="name" value="加菲" />
        <property name="hobby" value="吃，喝，睡觉" />
    </bean>
</beans>

运行结果：

2012-3-13 20:33:46 org.springframework.context.support.AbstractApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@c1b531: display name [org.springframework.context.support.ClassPathXmlApplicationContext@c1b531]; startup date [Tue Mar 13 20:33:46 CST 2012]; root of context hierarchy
2012-3-13 20:33:46 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [beans.xml]
2012-3-13 20:33:56 org.springframework.context.support.AbstractApplicationContext obtainFreshBeanFactory
信息: Bean factory for application context [org.springframework.context.support.ClassPathXmlApplicationContext@c1b531]: org.springframework.beans.factory.support.DefaultListableBeanFactory@12a3722
2012-3-13 20:33:56 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@12a3722: defining beans [myBeforeAdvice,catServiceBean,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.aop.config.internalAutoProxyCreator,cat]; root of factory hierarchy
自定义切面MyBeforeAdvice类的getVisits()方法的执行此数为1
大家好，我是加菲
自定义切面MyBeforeAdvice类的getVisits()方法的执行此数为2
我的兴趣爱好是吃，喝，睡觉

总结：每次运行的时候，都要等上12秒钟左右，有结果可以看出，Before增强处理的运行方式:

@Before("execution(* com.b510.service.impl.*.*(..))")

搜索com.b510.service.impl包下的所有类及其类的方法，作为本方法的切入点(Jionpoint)