简单工厂模式

using System;
using System.Collections.Generic;
using System.Text;

namespace Win.DesignPatterns.SimpleFactory
{
    public interface Fruit
    {
        //生长
        void grow();
        //收获
        void harvest();
        //种植
        void plant();
    }

    public class Apple : Fruit
    {
        public Apple()
        {
        }

        public void grow()
        {
            Console.WriteLine("Apple is growing.");
        }

        public void harvest()
        {
            Console.WriteLine("Apple is harvesting.");
        }

        public void plant()
        {
            Console.WriteLine("Apple is planting.");
        }
    }

    public class Strawberry : Fruit
    {
        public Strawberry()
        {
        }

        public void grow()
        {
            Console.WriteLine("Strawberry is growing.");
        }

        public void harvest()
        {
            Console.WriteLine("Strawberry is harvesting.");
        }

        public void plant()
        {
            Console.WriteLine("Strawberry is planting.");
        }
    }

    public class FruitGardener
    {
        //静态工厂方法
        public static Fruit factory(string which)
        {
            if (which.Equals("Apple"))
            {
                return new Apple();
            }
            else if (which.Equals("Strawberry"))
            {
                return new Strawberry();
            }
            else
            {
                return null;
            }
        }
    }

    public class SimpleFactory
    {
        [STAThread]
        static void Main(string[] args)
        {
            Fruit aFruit = FruitGardener.factory("Apple");//creat apple
            aFruit.grow();
            aFruit.harvest();
            aFruit.plant();
            aFruit = FruitGardener.factory("Strawberry");//creat strawberry
            aFruit.grow();
            aFruit.harvest();
            aFruit.plant();

            Console.ReadLine();
        }
    }
}