工厂模式和简单工厂有什么区别。废话不多说,对比第一篇例子应该很清楚能看出来。
优点: 工厂模式弥补了简单工厂模式中违背开放-封闭原则,又保持了封装对象创建过程的优点。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace DesignModel
{
public interface Factory
{
JS createjs();
}
public class JS
{
public int NumA { get; set; }
public int NumB { get; set; }
public virtual int GetResult()
{
return 0;
}
}
public class Add1 : JS
{
public override int GetResult()
{
return NumA + NumB;
}
}
public class Sub1 : JS
{
public override int GetResult()
{
return NumA - NumB;
}
}
public class AddFactory : Factory
{
public JS createjs()
{
return new Add1();
}
}
public class SubFactory: Factory
{
public JS createjs()
{
return new Sub1();
}
}
}
客户端调用:
Factory factory = new AddFactory();
JS js = factory.createjs();
js.NumA = 1;
js.NumB = 2;
Console.WriteLine( js.GetResult());
Factory f = new SubFactory();
JS J= f.createjs();
J.NumA = 9;
J.NumB = 0;
Console.WriteLine(J.GetResult());
Console.ReadLine();
原文:http://www.cnblogs.com/zhanjun/p/3861723.html