public abstract class Food
{
public abstract void Make();
}
public class Patato : Food
{
public override void Make()
{
Console.WriteLine("土豆做好了！");
}
}
public class TomatoWithEggs:Food
{
public override void Make()
{
Console.WriteLine("西红柿炒蛋做好了！");
}
}
public class Chicken : Food
{
public override void Make()
{
Console.WriteLine("鸡肉做好了！");
}
}
public class Customer
{
public static Food MakeFood(FoodType foodType)
{
Food food = null;
if (foodType == FoodType.Patato)
{
food = new Patato();
}
else if (foodType == FoodType.TomatoWithEggs)
{
food = new TomatoWithEggs();
}
else if (foodType == FoodType.Chicken)
{
food = new Chicken();
}
return food;
}
}
public class SimpleFactory
{
public static Food MakeFood(FoodType foodType)
{
Food food = null;
if (foodType == FoodType.Patato)
{
food = new Patato();
}
else if (foodType == FoodType.TomatoWithEggs)
{
food = new TomatoWithEggs();
}
else if (foodType == FoodType.Chicken)
{
food = new Chicken();
}
return food;
}
}
public enum FoodType
{
Patato, TomatoWithEggs, Chicken
}
class Program
{
/// <summary>
/// 模拟使用简单工厂的场景介绍：
/// 比如吃饭，想要吃什么菜都得自己去炒，我自己得全方位照顾到，这是单纯的需要什么去做什么
/// 使用简单工厂的思路就是：
/// 我要吃饭，我去饭馆吃，我想要吃什么我点菜，饭馆给我做就好了，至于怎么做是饭馆的事（此时饭馆就相当于简单工厂）
/// 相当于把做饭的细节从我身上推迟给饭馆
/// </summary>
/// <param name="args"></param>
static void Main(string[] args)
{
try
{
//TestNormal();
TestSimpleFactory();
}
catch (Exception e)
{
Console.WriteLine("Error：" + e.Message);
}
Console.WriteLine("End");
Console.ReadKey();
}
private static void TestNormal()
{
//不使用简单工厂，都是顾客自己来
//所有的业务代码（如何做饭）都写在顾客类中，导致程序耦合性变高，扩展性变低
var food1 = Customer.MakeFood(FoodType.Patato);
food1.Make();
var food2 = Customer.MakeFood(FoodType.Chicken);
food2.Make();
var food3 = Customer.MakeFood(FoodType.TomatoWithEggs);
food3.Make();
}
private static void TestSimpleFactory()
{
//使用简单工厂，客户直接去点菜就可以（自己不用操心如何做菜）
//后续扩展直接实现抽象类就可以，低耦合，易扩展
var food1 = SimpleFactory.MakeFood(FoodType.Patato);
food1.Make();
var food2 = SimpleFactory.MakeFood(FoodType.Chicken);
food2.Make();
var food3 = SimpleFactory.MakeFood(FoodType.TomatoWithEggs);
food3.Make();
}
}
