AOP實現方式3——通過來配置（純POJO切面）

1.定義接口Perform

package com.show;

/**
 * Created by kenneth on 2017/4/6.
 */
public interface Perform {
    void sing();
}

2.接口Perform的實現類Boy

package com.show;

/**
 * Created by kenneth on 2017/4/6.
 */
public class Boy implements Perform {
    @Override
    public void sing() {
        System.out.println("男孩在唱歌");
    }
}

3.定義通知PerformHelper

package com.show;

/**
 * Created by kenneth on 2017/4/6.
 */
public class PerformHelper {
    public void beforePerform() {
        System.out.println("表演之前要整理衣服");
    }

    public void afterPerform() {
        System.out.println("表演之後要行禮");
    }
}

4.Spring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.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--目標對象-->
    <bean id="boy" class="com.show.Boy"/>

    <!--切面-->
    <bean id="performHelper" class="com.show.PerformHelper"/>

    <!--配置切入點-->
    <aop:config>
        <aop:pointcut id="pointcut" expression="execution(public * *..Perform.sing(..))"/>
        <aop:aspect ref="performHelper">
            <aop:before method="beforePerform" pointcut-ref="pointcut"/>
            <aop:after method="afterPerform" pointcut-ref="pointcut"/>
        </aop:aspect>
    </aop:config>

</beans>

5.測試類

package com.show;

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

/**
 * Created by kenneth on 2017/4/6.
 */
public class Test {
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("ApplicationContext.xml");
        Perform performer = (Perform) context.getBean("boy");
        performer.sing();
    }
}

6.測試結果

四月 06, 2017 2:02:38 下午 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@533ddba: startup date [Thu Apr 06 14:02:38 CST 2017]; root of context hierarchy
四月 06, 2017 2:02:38 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [ApplicationContext.xml]
表演之前要整理衣服
男孩在唱歌
表演之後要行禮