dw个人网站制作教程,wordpress 显示缩略图,孝感市门户网站管理中心,制作网站专业公司哪家好1 命令模式介绍 2 命令模式原理 3 命令模式实现
模拟酒店后厨的出餐流程,来对命令模式进行一个演示,命令模式角色的角色与案例中角色的对应关系如下: 服务员: 即调用者角色,由她来发起命令. 厨师: 接收者,真正执行命令的对象. 订单: 命令中包含订单
/*** 订单类**/
public cl…1 命令模式介绍 2 命令模式原理 3 命令模式实现
模拟酒店后厨的出餐流程,来对命令模式进行一个演示,命令模式角色的角色与案例中角色的对应关系如下: 服务员: 即调用者角色,由她来发起命令. 厨师: 接收者,真正执行命令的对象. 订单: 命令中包含订单
/*** 订单类**/
public class Order {private int diningTable; //餐桌号码private MapString,Integer foodMenu new HashMap(); //存储菜名和份数public int getDiningTable() {return diningTable;}public void setDiningTable(int diningTable) {this.diningTable diningTable;}public MapString, Integer getFoodMenu() {return foodMenu;}public void setFoodMenu(MapString, Integer foodMenu) {this.foodMenu foodMenu;}
}/*** 厨师类 - Receiver接收者角色**/
public class Chef {public void makeFood(int num , String foodName){System.out.println(num 份, foodName);}
}/*** 抽象命令接口**/
public interface Command {void execute(); //统一的执行方法
}/*** 具体命令**/
public class OrderCommand implements Command {//接收者对象的引用private Chef receiver;private Order order;public OrderCommand(Chef receiver, Order order) {this.receiver receiver;this.order order;}Overridepublic void execute() {System.out.println(order.getDiningTable() 桌的订单: );SetString keySet order.getFoodMenu().keySet();for (String key : keySet) {receiver.makeFood(order.getFoodMenu().get(key),key);}try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}System.out.println(order.getDiningTable() 桌的菜品已经上齐!);}}/*** 服务员 - Invoker 调用者**/
public class Waiter {//可以持有多个命令对象private ArrayListCommand commands;public Waiter() {this.commands new ArrayList();}public Waiter(ArrayListCommand commands) {this.commands commands;}public void setCommand(Command command) {this.commands.add(command);}//发出指令public void orderUp(){System.out.println(叮咚! 服务员: 有新的订单,请师傅开始制作......);for (Command command : commands) {if(command ! null){command.execute();}}}
}public class Client {public static void main(String[] args) {Order order1 new Order();order1.setDiningTable(10);order1.getFoodMenu().put(鲍鱼炒饭,1);order1.getFoodMenu().put(海参炒面,1);Order order2 new Order();order2.setDiningTable(15);order2.getFoodMenu().put(回锅肉盖饭,1);order2.getFoodMenu().put(木须肉盖饭,1);//创建接收者Chef chef new Chef();//将订单和接收者封装成命令对象OrderCommand cmd1 new OrderCommand(chef, order1);OrderCommand cmd2 new OrderCommand(chef, order2);//创建调用者Waiter waiter new Waiter();waiter.setCommand(cmd1);waiter.setCommand(cmd2);//将订单发送给厨师 上菜waiter.orderUp();}
}4 命令模式总结
