• 導讀
• 例項

導讀

例項

介面

package com.xgj.aop.spring.advisor.aspectJ.aspectJByConf;

public interface Waiter {

    public void greetTo(String name);

    public void serverTo(String name);
}

POJO

package com.xgj.aop.spring.advisor.aspectJ.aspectJByConf;

public class NaiveWaiter
 
 implements Waiter {

    @Override
    public void greetTo(String name) {
        System.out.println("NaiveWaiter Greet To " + name);
    }

    @Override
    public void serverTo(String name) {
        System.out.println("NaiveWaiter Server To " + name);
    }

}

切面POJO

package com.xgj.aop.spring.advisor.aspectJ.aspectJByConf;

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

/**
 * 
 * 
 * @ClassName: PreGreetingAspect
 * 
 * @Description: 切面類
 * 
 * @author: Mr.Yang
 * 
 * @date: 2017年8月24日 下午3:21:15
 */

// 通過@Aspect將PreGreetingAspect標註為一個切面
@Aspect
public class PreGreetingAspect {

    // 定義切點和增強型別
 

    @Before("execution(* greetTo(..))")
    public void beforeGreeting() {// 增強的橫切邏輯
        System.out.println("How are you ?");
    }
}

配置檔案

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

<!-- 通過配置使用@AspectJ -->

<!-- 目標Bean -->
<bean id="waiter" class="com.xgj.aop.spring.advisor.aspectJ.aspectJByConf.NaiveWaiter"/>
<!-- 使用了@AspectJ註解的切面類 -->
<bean class="com.xgj.aop.spring.advisor.aspectJ.aspectJByConf.PreGreetingAspect"/>
<!-- 自動代理建立器，自動將@AspectJ註解切面類織入目標Bean中 -->
<bean class="org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator"/>

</beans>

單元測試

package com.xgj.aop.spring.advisor.aspectJ.aspectJByConf;

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

/**
 * 
 * 
 * @ClassName: PreGreetingAspectTest
 * 
 * @Description:
 * 
 * @author: Mr.Yang
 * 
 * @date: 2017年8月24日 下午3:21:29
 */
public class PreGreetingAspectTest {

    @Test
    public void test() {
        ApplicationContext ctx = new ClassPathXmlApplicationContext(
                "classpath:com/xgj/aop/spring/advisor/aspectJ/aspectJByConf/conf-aspectJ.xml");

        Waiter naiveWaiter = ctx.getBean("waiter", Waiter.class);

        naiveWaiter.greetTo("XiaoGongJiang");
        naiveWaiter.serverTo("XiaoGongJiang");
    }
}

執行結果：

2017-08-24 17:41:16,210  INFO [main] (AbstractApplicationContext.java:583) - Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@24177697: startup date [Thu Aug 24 17:41:16 BOT 2017]; root of context hierarchy
2017-08-24 17:41:16,609  INFO [main] (XmlBeanDefinitionReader.java:317) - Loading XML bean definitions from class path resource [com/xgj/aop/spring/advisor/aspectJ/aspectJByConf/conf-aspectJ.xml]
How are you ?
NaiveWaiter Greet To XiaoGongJiang
NaiveWaiter Server To XiaoGongJiang

可以看到greetTo被正確的織入了增強.