JDK和Cglib动态代理小demo

xiaoxiao2024-05-07 7

一：JDK动态代理

package com.zkn.newlearn.proxyhandler; import java.lang.reflect.InvocationHandler; import java.lang.reflect.Method; import java.lang.reflect.Proxy; import org.omg.CORBA.portable.InvokeHandler; /** * * @author zkn * 此代理类代理实现接口的类 * */ public class JdkProxyHandler implements InvocationHandler { private Object targetObject; public Object createObject(Object obj){ this.targetObject = obj; return Proxy.newProxyInstance(targetObject.getClass().getClassLoader(), targetObject.getClass().getInterfaces(), this); } public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { return method.invoke(targetObject, args); } }

2：CGLIB动态代理

package com.zkn.newlearn.proxyhandler; import java.lang.reflect.Method; import net.sf.cglib.proxy.Enhancer; import net.sf.cglib.proxy.MethodInterceptor; import net.sf.cglib.proxy.MethodProxy; /** * * @author zkn * 代理类不能为final修饰的类 * 此代理类代理的是没有实现接口的类 */ public class CglibProxyHandler implements MethodInterceptor{ /** * 代理对象 */ private Object targetObj; public Object createObject(Object obj){ this.targetObj = obj; Enhancer eh = new Enhancer(); eh.setSuperclass(this.targetObj.getClass()); eh.setCallback(this); return eh.create(); } public Object intercept(Object obj, Method arg1, Object[] arg2, MethodProxy proxy) throws Throwable { Object object = proxy.invoke(this.targetObj, arg2);//这里如果换成obj 会陷入死循环中 return object; } }