设计模式系列之-简单工厂

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using DPC.Domain;

namespace DPC.CreateModel.SimpleFactory
{
    class Program
    {
        static void Main(string[] args)
        {
            MobilePhone phone = MobilePhoneFactory.GetMobilePhone("苹果");
            phone.Show();
            Console.WriteLine();

            MobilePhone xiaomo = MobilePhoneFactory.GetMobilePhone("小米");
            xiaomo.Show();
            Console.ReadKey();
        }
    }


    //简单工厂（又名静态工厂）
    //优点：该模式代码简单易于理解，学习成本较小。
    //缺点：业务变动时需要修改工厂中的已有代码，违背了对修改关闭、对扩展开放的设计原则，不利于程序的扩展和维护。
    public class MobilePhoneFactory
    {
        public static MobilePhone GetMobilePhone(string name)
        { 
            switch(name)
            {
                case "苹果":
                    return new IPhone("iphone6", 5000);
                case "小米":
                    return new XiaoMi("小米青春版", 2000);
                default:
                    throw new NotImplementedException("不存在的品牌");
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DPC.Domain
{
    public abstract class MobilePhone
    {
        public MobilePhone(string model,decimal price)
        {
            this.Model = model;
            this.Price = price;
        }

        /// <summary>
        /// 名字
        /// </summary>
        public abstract string Name { get; }

        /// <summary>
        /// 型号
        /// </summary>
        public string Model { get; private set; }

        /// <summary>
        /// 价格
        /// </summary>
        public decimal Price { get; private set; }

        /// <summary>
        /// 综合情况展示
        /// </summary>
        public virtual void Show()
        {
            Console.WriteLine("品牌：{0}，型号：{1}，价格：{2}", this.Name, this.Model, this.Price);
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DPC.Domain
{
    public class IPhone : MobilePhone
    {
        private static readonly string name = "苹果";

        public IPhone(string model, decimal price)
            : base(model, price) 
        { }

        public override string Name
        {
            get { return name; }
        }

        public override void Show()
        {
            Console.WriteLine("土豪手机闪亮登场......");
            Console.WriteLine("品牌：{0}，型号：{1}，价格：{2}",this.Name,this.Model,this.Price);
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DPC.Domain
{
    public class XiaoMi : MobilePhone
    {
        public XiaoMi(string model, decimal price)
            : base(model, price)
        { }

        public override string Name
        {
            get { return "小米"; }
        }

        public override void Show()
        {
            Console.WriteLine("made in china手机闪亮登场......");
            Console.WriteLine("品牌：{0}，型号：{1}，价格：{2}", this.Name, this.Model, this.Price);
        }
    }
}