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Java 动态代理详解
package com.at221; //代理设计模式: interface ClothFactory{ void product(); } class NikeFactory implements ClothFactory{//被代理类: @Override public void product() { System.out.println("Nike服装很可靠"); } } class ProxyFactory implements ClothFactory{//代理类: private NikeFactory nf; public ProxyFactory(NikeFactory nf){ this.nf = nf; } @Override public void product() { this.nf.product(); } } public class TestProxy { public static void main(String[] args) { NikeFactory nf = new NikeFactory(); ProxyFactory pf = new ProxyFactory(nf); pf.product(); } }
下面是利用反射机制进行实现的动态代理:
package com.at221; import java.lang.reflect.InvocationHandler; import java.lang.reflect.Method; import java.lang.reflect.Proxy; interface Subject{ void show(); } class RealSubject implements Subject{ @Override public void show() { System.out.println("zhaoning,i love you!!!"); } } class ProxySubject implements InvocationHandler{ Object obj; public Object blind(Object obj){ this.obj = obj; return Proxy.newProxyInstance(obj.getClass().getClassLoader(), obj.getClass().getInterfaces(), this); } @Override public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { Object returnVal = method.invoke(obj, args); return returnVal; } } public class TestProxy1{ public static void main(String[] args) { RealSubject rs = new RealSubject(); ProxySubject ps = new ProxySubject(); Subject rss = (Subject)ps.blind(rs); rss.show(); } }
Java 动态代理详解
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