设计模式(二):原型设计

原型设计的目的是为了使数据在操作的时候,留存跟,也就是备份或者说是拷贝.

拷贝分为浅拷贝和深拷贝,区别是深拷贝拷贝了对象以及对象所在的成员变量.

场景:客户一个月要生产30000个产品,而一个工厂一个月满载的生产能力是10000,要求每个工厂都要记录,以便后续质量跟踪.

一:创建接口类(包含clone方法)

package yuaxing;

public interface ProtoType {
	
	ProtoType cloneSelf();
}

二:创建订单接口(继承ProType)

package yuaxing;

public interface Iorder extends ProtoType{
	
	int getNum();
	void setNum(int num);
}

三:创建个人订单类(实现Ioder)

package yuaxing;

public class PersonalOrder implements Iorder {
	public int orderNum;
	
	public String orderName;
	public String getOrderName() {
		return orderName;
	}

	public void setOrderName(String orderName) {
		this.orderName = orderName;
	}

	@Override
	public ProtoType cloneSelf() {
		PersonalOrder personalOrder = new PersonalOrder();
		personalOrder.setNum(orderNum);
		personalOrder.setOrderName(orderName);
		return personalOrder;
	}

	@Override
	public int getNum() {
		return orderNum;
	}

	@Override
	public void setNum(int num) {
		this.orderNum = num;
	}

}

其中Name,为子类私有变量.

四:创建订单处理中心

package yuaxing;

public class OrderDealFactory {
	public void dealOrder(Iorder order) {
		int num = order.getNum();
		
		while(num >0) {
			PersonalOrder cloneSelf = (PersonalOrder) order.cloneSelf();
			cloneSelf.setNum(num>10000?10000:num);
			num = num -10000;
	
			System.out.println("工厂Id-->"+cloneSelf.hashCode()+"数量-->"+cloneSelf.getNum());;
		}
	}
}

五:客户端调用

package yuaxing;

public class Client {
	public static void main(String []args) {
		OrderDealFactory orderDealFactory = new OrderDealFactory();
		PersonalOrder personalOrder = new PersonalOrder();
		personalOrder.setNum(30000);
		personalOrder.setOrderName("个人订单");
		
		orderDealFactory.dealOrder(personalOrder);
	}
}

调用结果

工厂Id-->2018699554数量-->10000
工厂Id-->1311053135数量-->10000
工厂Id-->118352462数量-->10000

每一个工厂的对象都被记录下来.