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cglib动态代理
cglib是基于继承的方式实现的

是继承目标类从而产生代理类

springaop底层使用的就是cglib的动态代理

package com.itheima.cjlibproxy;import net.sf.cglib.proxy.Callback;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;import java.lang.reflect.Method;/*** @author healer* @Description CglibProxyUtils* @data 2024-06-08 15:21*/
public class CglibProxyUtils {public static Object createProxy(Object targetClass) {// 创建一个 enhancerEnhancer enhancer = new Enhancer();//        需要指定创建出来的代理类的父类enhancer.setSuperclass(targetClass.getClass());//        增强enhancer.setCallback(new MethodInterceptor() {@Overridepublic Object intercept(Object o, Method method, Object[] args, MethodProxy methodProxy) throws Throwable {long start = System.currentTimeMillis();Object result = method.invoke(targetClass, args);long end = System.currentTimeMillis();System.out.println("-------->方法耗时:" + (end - start) + "ms");return result;}});//        创建代理对象return enhancer.create();}}

package com.itheima.cjlibproxy;import com.itheima.jdkProxy.JdkProxyUtil;
import com.itheima.service.DeptService;
import com.itheima.service.impl.DeptServiceImpl;/*** @author healer* @Description CglibProxyDemo* @data 2024-06-08 15:29*/
public class CglibProxyDemo {public static void main(String[] args) {DeptService deptService = new DeptServiceImpl();DeptService proxyDeptService = (DeptService) CglibProxyUtils.createProxy(deptService);proxyDeptService.update();}
}