cglib 动态代理

JDK的动态代理比较慢，可以使用cglib的代理，速度比较快：

package cn.demo02;

import java.lang.reflect.Method;

import java.util.zip.CheckedInputStream;

import org.springframework.beans.BeansException;

import org.springframework.beans.factory.config.BeanPostProcessor;

import org.springframework.cglib.proxy.Enhancer;

import org.springframework.cglib.proxy.MethodInterceptor;

import org.springframework.cglib.proxy.MethodProxy;

public class PostBean implements BeanPostProcessor {

@Override

public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {

return bean;

}

@Override

public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {

if (bean instanceof Child) {

// 对Bean进行 cg(Code generation )lib动态代理

Object proxyBean = Enhancer.create(bean.getClass(), new MethodInterceptor() {

@Override

public Object intercept(Object proxyBean, Method method, Object[] args, MethodProxy methodProxy)

throws Throwable {

if (method.getName().equals("say")) {

System.err.println("say is beging...");

Object obj = methodProxy.invokeSuper(proxyBean, args);

System.err.println("say is over...");

return obj;

} else {

// 直斥放行

return method.invoke(bean, args);                                          }

}

});

return proxyBean;

}

return bean;

}

}