静态代理模式

代理：顾名思义就是需要另外一方代替做事情呗。
模拟场景：小蜜代替老板做事情。我要找老板要点钱，老板很忙，我就去找他小蜜，找了他小蜜，他小蜜给了钱。小蜜可能还不单只有给钱的功能，具体大家想象...^_^
下面就是静态代理的代码喽：

//老板的功能  
  public interface  Subject {

  public void  operate();
}

 //老板登场     
public class RealSubject implements Subject {

	public void operate() {
       System.out.println("this is real subject");
	}
}

//小蜜出现了 
public class ProxySubject implements Subject {

	private RealSubject realSubject;

	public void operate() {
		
		realSubject = new RealSubject();
		
		System.out.println("play other operate");
		realSubject.operate();
		
	}
}

public class DoAction {

	public static void main(String[]args){
		
	Subject  subject = new ProxySubject();
		
             subject.operate();
	}
}