设计模式 命令模式2

先写一个厨师类

public class Barbecuer {
	public void BakeMutton()
	{
		System.out.println("烤羊肉串");
	}
	
	public void BakeChickenWing()
	{
		System.out.println("烤鸡翅！");
	}
}

写一个命令类

public abstract class Command {
	protected Barbecuer receiver;
	public Command(Barbecuer receiver)
	{
		this.receiver=receiver;
	}
	abstract public void ExecuteCommand();
}

写两个命令继承command

public class BakeMuttonCommand extends Command{

	public BakeMuttonCommand(Barbecuer receiver) {
		super(receiver);
		// TODO Auto-generated constructor stub
	}

	@Override
	public void ExecuteCommand() {
		// TODO Auto-generated method stub
		receiver.BakeMutton();
	}
	

}

public class BakeChickenWingCommand  extends Command{

	public BakeChickenWingCommand(Barbecuer receiver) {
		super(receiver);
		// TODO Auto-generated constructor stub
	}

	@Override
	public void ExecuteCommand() {
		// TODO Auto-generated method stub
		receiver.BakeChickenWing();
	}

}

再写服务生类

import java.util.ArrayList;
import java.util.List;
import java.util.Timer;

public class Waiter {
	private List<Command> orders = new ArrayList<Command>();
	
	public void SetOrder(Command command)
	{
		if(command.toString() == "鸡翅")
		{
			System.out.println("服务员：鸡翅没有了，请点别的烧烤。");
		}
		else
		{
			orders.add(command);
			System.out.println("增加定点："+command.toString());
		}
	}
	
	public void CancelOrder(Command command)
	{
		orders.remove(command);
		System.out.println("取消订单"+command.toString());
	}
	
	public void Notify()
	{
		for (Command command : orders) {
			command.ExecuteCommand();
		}
	}
}

最后写测试类

public class Program {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		//开店前得准备
		Barbecuer boy =new Barbecuer();
		Command bakeMuttonCommand1 = new BakeMuttonCommand(boy);
		Command bakeMuttonCommand2= new BakeMuttonCommand(boy);
		Command bakeChickenWingCommand1 = new BakeChickenWingCommand(boy);
		Waiter girl=new Waiter();
		
		//开门营业 开始点菜
		girl.SetOrder(bakeMuttonCommand1);
		girl.SetOrder(bakeMuttonCommand2);
		girl.SetOrder(bakeChickenWingCommand1);
		
		//点菜完毕，通知厨房
		girl.Notify();
		

	}

}