标签：put running tar sso return img enter lang callback
本文分为两部分：1）给出Spring AOP的一个例子（会使用CGLIB代理）；2）给出获取被CGLIB代理的原始对象。
1、Spring AOP Demo
这部分参考了博文（http://www.voidcn.com/blog/daguanjia11/article/p-4628090.html）
1.1添加maven依赖
<dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>4.0.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>4.0.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>4.0.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>4.0.5.RELEASE</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.8.1</version> </dependency>
1.2添加测试类
public class SpringAopTest { public static class Car { public void go() { System.out.println("go go go!"); } } public static class CarLogger { public void beforeRun() { System.out.println("car is going to run"); } public void afterRun() { System.out.println("car is running"); } } public static void main(String[] args) { ApplicationContext context = new ClassPathXmlApplicationContext("spring-aop-test.xml"); Car car = (Car) context.getBean("car"); System.out.println(car.getClass()); car.go(); } }
1.3添加spring配置文件
放置在classpath的根目录下，额，放在resources目录下也就行了。
<?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-4.0.xsd"> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" 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-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd" > <bean id="car" class="com.SpringAopTest.Car"/> <bean id="logger" class="com.SpringAopTest.CarLogger" /> <aop:config> <aop:aspect ref="logger"> <aop:pointcut expression="execution(* com.SpringAopTest.Car.go(..))" id="go"/> <aop:before pointcut-ref="go" method="beforeRun" /> <aop:after pointcut-ref="go" method="afterRun" /> </aop:aspect> </aop:config> </beans> </beans>
1.4运行main函数
得到如下结果：
car is going to run
go go go!
car is running
呐，你看go go go!前后都有后添加的动作吧。
2、获取被CGLIB代理的对象
这部分内容参考了博文（http://blog.csdn.net/liufeng520/article/details/43563161）
我们先通过debug看一下被代理对象被藏在哪里了
好，看完了，我们来写一下代码，如下：
import java.lang.reflect.Field; import org.springframework.aop.framework.AdvisedSupport; import org.springframework.aop.support.AopUtils; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; /** * Created by qm on 17/2/15. */ public class SpringAopTest { public static class Car { public void go() { System.out.println("go go go!"); } } public static class CarLogger { public void beforeRun() { System.out.println("car is going to run"); } public void afterRun() { System.out.println("car is running"); } } public static Object getTarget(Object beanInstance) { if (!AopUtils.isAopProxy(beanInstance)) { return beanInstance; } else if (AopUtils.isCglibProxy(beanInstance)) { try { Field h = beanInstance.getClass().getDeclaredField("CGLIB$CALLBACK_0"); h.setAccessible(true); Object dynamicAdvisedInterceptor = h.get(beanInstance); Field advised = dynamicAdvisedInterceptor.getClass().getDeclaredField("advised"); advised.setAccessible(true); Object target = ((AdvisedSupport) advised.get(dynamicAdvisedInterceptor)).getTargetSource().getTarget(); return target; } catch (NoSuchFieldException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } return null; } public static void main(String[] args) { ApplicationContext context = new ClassPathXmlApplicationContext("spring-aop-test.xml"); Car car = (Car) context.getBean("car"); Object target = getTarget(car); System.out.println(target == car); System.out.println(car.getClass()); System.out.println(target.getClass()); car.go(); } }
Spring AOP demo 和获取被CGLIB代理的对象
标签：put running tar sso return img enter lang callback
原文地址：https://www.cnblogs.com/toSeeMyDream/p/9646380.html
