Spring AOP demo 和获取被CGLIB代理的对象
2021-06-29 11:05
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 1.2添加测试类 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。 得到如下结果： 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： 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.htmldependency>
groupId>org.springframeworkgroupId>
artifactId>spring-coreartifactId>
version>4.0.5.RELEASEversion>
dependency>
dependency>
groupId>org.springframeworkgroupId>
artifactId>spring-beansartifactId>
version>4.0.5.RELEASEversion>
dependency>
dependency>
groupId>org.springframeworkgroupId>
artifactId>spring-contextartifactId>
version>4.0.5.RELEASEversion>
dependency>
dependency>
groupId>org.springframeworkgroupId>
artifactId>spring-aopartifactId>
version>4.0.5.RELEASEversion>
dependency>
dependency>
groupId>org.aspectjgroupId>
artifactId>aspectjweaverartifactId>
version>1.8.1version>
dependency>
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();
}
}
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car is going to run
go go go!
car is running
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();
}
}
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文章标题：Spring AOP demo 和获取被CGLIB代理的对象
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