1.动态代理（aop编程模型范式）

import java.lang.invoke.InvocationHandler;

public class DynamicProxyTest 
{

    interface IHello
    {
		sayHello();
    }
    
	static class Hello implements IHello
	{
		public void syaHello(){
			System.out.println("Hello World");
		}
	}

	static class DynamicProxy implements InvocationHandler{
	
		Object originalObj;

	    Object bind(Object originalObj){
	
	        this.orignalObj = originalObj;
	    	return Rroxy.newProxyInstance(orignalObj.getClass().getClassLoader(),originalObj.getClass().getInterfaces(),this);
	    }

	    @Override
	    public void invoke(Object obj,Method method,Object[] objs){
	        System.out.println("通过代理实现的方法调用");
		    method.invoke(obj,clazz.objs);
	    }
	}

	

	public static void main(String[] args) 
	{
		IHello hello = (IHello) DynamicProxy.bind(new Hello());
		hello.sayHello();

	}
}

2.工厂模式