【C#设计模式(2)——工厂模式】

前言

工厂模式：使用工厂创建对象。

工厂模式的主要目的是分离对象的创建与调用，通过使用工厂统一管理对象的创建。工厂模式可以隐藏对象的创建细节，使客户终端代码只关注使用对象而不需要关注对象的创建过程。

运行结果

代码

#region 食品
//食品接口
public interface IFood
{
    void CreateFood();      //创建食品
    void SetManufacturer(string manufacturer);  //设置制造商
}
// 食品类
public class Food
{
    protected string Name { get; set; }
    protected string Manufacturer { get; set; }
    protected string Description { get; set; }
}


// 具体罐头食品类：继承食品类，实现食品接口。
public class ConcreteCannedFood : Food, IFood
{
    public ConcreteCannedFood(string name, string description)
    {
        Name = name;
        Description = description;
    }
    public void CreateFood()
    {
        Console.WriteLine($"【食品名称】：{Name}.");
        Console.WriteLine($"【生产厂商】：{Manufacturer}.");
        Console.WriteLine($"【食品描述】：{Description}.");
        Console.WriteLine();
    }
    public void SetManufacturer(string manufacturer)
    {
        Manufacturer = manufacturer;
    }
}
#endregion

#region 食品工厂
// 工厂接口
public interface IFactory
{
    IFood ProduceFood(string name);	//生产食品
}
// 工厂类
public class Factory
{
    protected string Name { get; set; }
}
// 罐头食品工厂类
public class CannedFoodFactory : Factory, IFactory
{
    public CannedFoodFactory(string name)
    {
        this.Name = name;
        Console.WriteLine($"【{this.Name}】开始生产...");
        Console.WriteLine("-----------------------------------------------------");
    }
    public IFood ProduceFood(string name)
    {
        IFood food =null;
        switch (name)
        {
            case FoodList.苹果罐头:
                food = new ConcreteCannedFood(FoodList.苹果罐头, FoodList.苹果罐头描述);
                break;
            case FoodList.橙子罐头:
                food = new ConcreteCannedFood(FoodList.橙子罐头, FoodList.橙子罐头描述);
                break;
            case FoodList.黄桃罐头:
                food = new ConcreteCannedFood(FoodList.黄桃罐头, FoodList.黄桃罐头描述);
                break;
            case FoodList.凤梨罐头:
                food = new ConcreteCannedFood(FoodList.凤梨罐头, FoodList.凤梨罐头描述);
                break;
            case FoodList.菠萝罐头:
                food = new ConcreteCannedFood(FoodList.菠萝罐头, FoodList.菠萝罐头描述);
                break;
            case FoodList.草莓罐头:
                food = new ConcreteCannedFood(FoodList.草莓罐头, FoodList.草莓罐头描述);
                break;
            case FoodList.樱桃罐头:
                food = new ConcreteCannedFood(FoodList.樱桃罐头, FoodList.樱桃罐头描述);
                break;
            case FoodList.葡萄罐头:
                food = new ConcreteCannedFood(FoodList.葡萄罐头, FoodList.葡萄罐头描述);
                break;
            case FoodList.橘子罐头:
                food = new ConcreteCannedFood(FoodList.橘子罐头, FoodList.橘子罐头描述);
                break;
            case FoodList.柠檬罐头:
                food = new ConcreteCannedFood(FoodList.柠檬罐头, FoodList.柠檬罐头描述);
                break;
            default:
                return null;
        }
        food.SetManufacturer(this.Name);
        food.CreateFood();
        return food;
    }
}
#endregion

#region 清单
/// <summary>
/// 食品清单
/// </summary>
public class FoodList
{
    public const string 苹果罐头 = "苹果罐头";
    public const string 橙子罐头 = "橙子罐头";
    public const string 黄桃罐头 = "黄桃罐头";
    public const string 凤梨罐头 = "凤梨罐头";
    public const string 菠萝罐头 = "菠萝罐头";
    public const string 草莓罐头 = "草莓罐头";
    public const string 樱桃罐头 = "樱桃罐头";
    public const string 葡萄罐头 = "葡萄罐头";
    public const string 橘子罐头 = "橘子罐头";
    public const string 柠檬罐头 = "柠檬罐头";

    public const string 苹果罐头描述 = "苹果罐头由苹果、白砂糖、柠檬汁等原材料制成，具有补充营养、提供能量、促进消化等功效";
    public const string 橙子罐头描述 = "橙子罐头采用新鲜橙子制成，富含维生素C，具有增强免疫力、清新口气的效果。";
    public const string 黄桃罐头描述 = "黄桃罐头由成熟的桃子制成，口感鲜美，含有丰富的维生素和矿物质，有助于美容养颜。";
    public const string 凤梨罐头描述 = "凤梨罐头选用新鲜梨子，清甜可口，具有润肺止咳、清热解毒的功效。";
    public const string 菠萝罐头描述 = "菠萝罐头由新鲜菠萝制成，酸甜可口，含有丰富的维生素C和纤维素，有助于消化。";
    public const string 草莓罐头描述 = "草莓罐头采用新鲜草莓，色泽鲜艳，味道甜美，富含抗氧化剂，有助于抗衰老。";
    public const string 樱桃罐头描述 = "樱桃罐头由新鲜樱桃制成，口感酸甜，富含维生素和矿物质，有助于改善睡眠。";
    public const string 葡萄罐头描述 = "葡萄罐头选用新鲜葡萄，味道鲜美，含有丰富的抗氧化剂，有助于保护心脏健康。";
    public const string 橘子罐头描述 = "橘子罐头由新鲜橘子制成，口感酸甜，富含维生素C，具有促进消化、增强免疫力的功效。";
    public const string 柠檬罐头描述 = "柠檬罐头采用新鲜柠檬制成，酸味浓郁，富含维生素C，有助于清新口气和美容养颜。";
}
/// <summary>
/// 工厂清单
/// </summary>
public class FactoryList
{
    public const string 温州罐头厂 = "温州罐头厂";
    public const string 广州罐头厂 = "广州罐头厂";
    public const string 北京罐头厂 = "北京罐头厂";
    public const string 上海罐头厂 = "上海罐头厂";
    public const string 深圳罐头厂 = "深圳罐头厂";
}



 /*
  * 工厂模式：使用工厂创建对象
  */
 internal class Program
 {
     static void Main(string[] args)
     {

         IFactory factory1 = new CannedFoodFactory(FactoryList.北京罐头厂);
         IFood food1 = factory1.ProduceFood(FoodList.苹果罐头);
         IFood food2 = factory1.ProduceFood(FoodList.黄桃罐头);
         IFood food3 = factory1.ProduceFood(FoodList.凤梨罐头);
         IFood food4 = factory1.ProduceFood(FoodList.柠檬罐头);

         IFactory factory2 = new CannedFoodFactory(FactoryList.温州罐头厂);
         IFood food11 = factory2.ProduceFood(FoodList.苹果罐头);
         IFood food12 = factory2.ProduceFood(FoodList.黄桃罐头);
         IFood food13 = factory2.ProduceFood(FoodList.草莓罐头);
         IFood food14 = factory2.ProduceFood(FoodList.菠萝罐头);
         Console.ReadLine();
         Console.ReadLine();
     }
 }
#endregion