public Basket(DiscountType type)
{
this._strategy = BasketDiscountFactory.GetDiscount(type);
}
public Basket(DiscountType discountType)
{
_basketDiscount = BasketDiscountFactory.GetDiscount(discountType);
}
/// <summary>
/// 通过构造函数实现创建具体的打折策略对象
/// </summary>
/// <param name="discountType"></param>
public Basket(DiscountType discountType)
{
//根据枚举类型使用工厂方法创建指定的打折策略（都实现了IBasketDiscountStrategy接口）
//实现了该接口的具体实现类中都实现了GetTotalCostAfterApplyingDiscountTo方法实现打折
_basketDiscount = BasketDiscountFactory.GetDiscount(discountType);
}
public Basket(DiscountTypeEnum discountType)
{
_basketDiscountStrategy = BasketDiscountFactory.GetDiscount(discountType);
}