设计模式--工厂方法，与生活联系

一、个人理解

      1、定义创建产品的接口，将实际创建工作延迟到子类中实现

      2、实现调用者与具体产品的解耦

      3、调用者通过工厂来生成产品

二、生活运用

         1、数据库访问控制，支持access,sql,mysql,oracle多种数据库

         2、反射工厂模式，利用传入的参数即可找到指定需要的对象

         3、旅游公司，选择去游玩的路线即可，无需对产品有具体的了解

三、代码

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

namespace ModeDemo.Factory
{
    public abstract class Creator
    {
        public abstract Product FactoryMethod();
    }
}

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

namespace ModeDemo.Factory
{
    public class ConcreateCreator:Creator
    {
        public override Product FactoryMethod()
        {
            return new ConcreateProductA();
        }
    }
}

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

namespace ModeDemo.Factory
{
    public class ConcreateCreatorB:Creator
    {
        public override Product FactoryMethod()
        {
            return new ConcreateProductB();
        }
    }
}

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

namespace ModeDemo.Factory
{
    public abstract class Product
    {
    }
}

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

namespace ModeDemo.Factory
{
    public class ConcreateProductA:Product
    {
    }
}

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

namespace ModeDemo.Factory
{
    public class ConcreateProductB:Product
    {
    }
}

Factory.Creator[] creators = new ModeDemo.Factory.Creator[2];
            creators[0] = new Factory.ConcreateCreator();
            creators[1] = new Factory.ConcreateCreatorB();

            foreach (Factory.Creator creator in creators)
            {
                Factory.Product product = creator.FactoryMethod();
                Console.WriteLine("Created {0}", product.GetType().Name);
            }

            Console.Read();