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();
        }
    }
}