.NET实用设计模式:工厂模式(Factory)
2008-11-19 10:34
393 查看
设计模式从本质上说是一种规则,从形式上说,分为创建型、结构型、行为型。
设计模式的应用是为了实现软件设计中的几个原则,其中一个重要原则是:减少模块之间的耦合程度。为了确保这个目的,在设计一个类时,要针对接口,而非实现。(Programming to an Interface, not an Implementation)设计的时候只关心类的接口,编程的时候可以先实现一个简单的接口,供别的模块调用。使用一个类的时候只对接口工作,不关心具体的实现,也不关心具体的类型。这样也符合人类认识世界的规律,一般说来人们总是先了解一个事情的大概情况,比如,我们先了解一台电视机的大概功能,然后才能了解每个功能具体是怎样实现的。
开始的时候不提供实现,正是为了以后能够最大限度的实现。
设计模式不受语言的限制,使用.net或者java更容易实现。
工厂模式(Factory)
工厂模式属于一种创建型模式(Creational)。同样属于创建型模式的还有单件模式(Singleton),以后有机会再说。
工厂模式的要点:
1:存在一个创建对象的工厂;
2:调用者从工厂中取得某些对象;
3:由工厂决定如何创建对象;
4:客户不知道对象是如何生成的。
举一个例子,下面的类视图:
![](https://oscdn.geek-share.com/Uploads/Images/Content/202002/24/eaa1d6cf782a707400b8bc2a1f8bad7d.gif)
Namer对象是FirstFirst和LastFirst的基类,用户调用Namer类的时候,不直接new出Namer类或者他的子类,而是使用NameFactory的getName方法得到具体的对象。这样在用户就不用关心自己正在使用的是哪一个Namer,正在调用哪一个方法。用户只针对Namer进行工作,而不用关心具体的类型。在实际工程中可以将Namer类的子类的构造函数只对NameFactory开放,进一步限制程序员。
C#代码如下:
1:Namer的实现
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
using System;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
namespace NameFactory
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/34031c708bfe702fe82d01ff5c6593aa.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/0be121fa5b8988fbabbbc526af3b0fc0.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
/**//// <summary>
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
/// Summary description for Namer.
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
/// </summary>
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
//Base class for getting split names
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
public class Namer
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
//parts stored here
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
protected string frName, lName;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
//return first name
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
public string getFrname()
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
return frName;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
//return last name
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
public string getLname()
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
return lName;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030189/4fd96b3cf02f4c7b5c8964ac8167f7af.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
2:FirstFirst类的实现
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
using System;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
namespace NameFactory
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/34031c708bfe702fe82d01ff5c6593aa.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/0be121fa5b8988fbabbbc526af3b0fc0.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
/**//// <summary>
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
/// Summary description for FirstFirst.
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
/// </summary>
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
public class FirstFirst : Namer
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
public FirstFirst(string name)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
int i = name.IndexOf (" ");
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
if(i > 0)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
frName = name.Substring (0, i).Trim ();
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
lName = name.Substring (i + 1).Trim ();
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
else
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
lName = name;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
frName = "";
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030189/4fd96b3cf02f4c7b5c8964ac8167f7af.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
3:LastFirst类的实现
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
using System;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
namespace NameFactory
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/34031c708bfe702fe82d01ff5c6593aa.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/0be121fa5b8988fbabbbc526af3b0fc0.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
/**//// <summary>
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
/// Summary description for LastFirst.
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
/// </summary>
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
public class LastFirst : Namer
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
public LastFirst(string name)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
int i = name.IndexOf (",");
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
if(i > 0)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
lName = name.Substring (0, i);
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
frName = name.Substring (i + 1).Trim ();
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
else
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
lName = name;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
frName = "";
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030189/4fd96b3cf02f4c7b5c8964ac8167f7af.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
4:NameFactory,工厂的实现
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
using System;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
namespace NameFactory
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/34031c708bfe702fe82d01ff5c6593aa.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/0be121fa5b8988fbabbbc526af3b0fc0.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
/**//// <summary>
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
/// Summary description for NameFactory.
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
/// </summary>
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
public class NameFactory
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
public NameFactory()
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
public static Namer getName(string name)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
int i = name.IndexOf (",");
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
if(i > 0)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
return new LastFirst (name);
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
else
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
return new FirstFirst (name);
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030189/4fd96b3cf02f4c7b5c8964ac8167f7af.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
5:调用者,一个窗体,如图:
![](https://oscdn.geek-share.com/Uploads/Images/Content/202002/24/fc87b5a548e5ae63c0ccd187e973fd01.gif)
按钮的响应事件代码如下:
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/34031c708bfe702fe82d01ff5c6593aa.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/0be121fa5b8988fbabbbc526af3b0fc0.gif)
private void btCompute_Click(object sender, System.EventArgs e)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
Namer nm = NameFactory.getName (txName.Text );
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
txFirst.Text = nm.getFrname ();
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
txLast.Text = nm.getLname ();
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030189/4fd96b3cf02f4c7b5c8964ac8167f7af.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
程序并不复杂,运行不运行无所谓,关键是要搞清楚Factory所起的作用:他隐藏了Namer类的创建细节,调用者始终不知道他创建的是哪一个类,也不需要关心他调用的方法是哪一个子类的。如果以后的程序的需求发生改动,比如:某国的人不仅有First Name和Last Name,还有Mid Name,就可以很方便的进行扩充,添加一个Namer的子类,修改一下Factory。调用者甚至不知道有新加了一种Namer的类型。
设计模式的应用是为了实现软件设计中的几个原则,其中一个重要原则是:减少模块之间的耦合程度。为了确保这个目的,在设计一个类时,要针对接口,而非实现。(Programming to an Interface, not an Implementation)设计的时候只关心类的接口,编程的时候可以先实现一个简单的接口,供别的模块调用。使用一个类的时候只对接口工作,不关心具体的实现,也不关心具体的类型。这样也符合人类认识世界的规律,一般说来人们总是先了解一个事情的大概情况,比如,我们先了解一台电视机的大概功能,然后才能了解每个功能具体是怎样实现的。
开始的时候不提供实现,正是为了以后能够最大限度的实现。
设计模式不受语言的限制,使用.net或者java更容易实现。
工厂模式(Factory)
工厂模式属于一种创建型模式(Creational)。同样属于创建型模式的还有单件模式(Singleton),以后有机会再说。
工厂模式的要点:
1:存在一个创建对象的工厂;
2:调用者从工厂中取得某些对象;
3:由工厂决定如何创建对象;
4:客户不知道对象是如何生成的。
举一个例子,下面的类视图:
![](https://oscdn.geek-share.com/Uploads/Images/Content/202002/24/eaa1d6cf782a707400b8bc2a1f8bad7d.gif)
Namer对象是FirstFirst和LastFirst的基类,用户调用Namer类的时候,不直接new出Namer类或者他的子类,而是使用NameFactory的getName方法得到具体的对象。这样在用户就不用关心自己正在使用的是哪一个Namer,正在调用哪一个方法。用户只针对Namer进行工作,而不用关心具体的类型。在实际工程中可以将Namer类的子类的构造函数只对NameFactory开放,进一步限制程序员。
C#代码如下:
1:Namer的实现
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
using System;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
namespace NameFactory
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/34031c708bfe702fe82d01ff5c6593aa.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/0be121fa5b8988fbabbbc526af3b0fc0.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
/**//// <summary>
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
/// Summary description for Namer.
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
/// </summary>
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
//Base class for getting split names
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
public class Namer
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
//parts stored here
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
protected string frName, lName;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
//return first name
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
public string getFrname()
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
return frName;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
//return last name
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
public string getLname()
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
return lName;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030189/4fd96b3cf02f4c7b5c8964ac8167f7af.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
2:FirstFirst类的实现
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
using System;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
namespace NameFactory
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/34031c708bfe702fe82d01ff5c6593aa.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/0be121fa5b8988fbabbbc526af3b0fc0.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
/**//// <summary>
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
/// Summary description for FirstFirst.
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
/// </summary>
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
public class FirstFirst : Namer
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
public FirstFirst(string name)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
int i = name.IndexOf (" ");
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
if(i > 0)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
frName = name.Substring (0, i).Trim ();
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
lName = name.Substring (i + 1).Trim ();
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
else
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
lName = name;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
frName = "";
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030189/4fd96b3cf02f4c7b5c8964ac8167f7af.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
3:LastFirst类的实现
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
using System;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
namespace NameFactory
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/34031c708bfe702fe82d01ff5c6593aa.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/0be121fa5b8988fbabbbc526af3b0fc0.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
/**//// <summary>
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
/// Summary description for LastFirst.
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
/// </summary>
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
public class LastFirst : Namer
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
public LastFirst(string name)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
int i = name.IndexOf (",");
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
if(i > 0)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
lName = name.Substring (0, i);
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
frName = name.Substring (i + 1).Trim ();
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
else
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
lName = name;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
frName = "";
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030189/4fd96b3cf02f4c7b5c8964ac8167f7af.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
4:NameFactory,工厂的实现
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
using System;
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
namespace NameFactory
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/34031c708bfe702fe82d01ff5c6593aa.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/0be121fa5b8988fbabbbc526af3b0fc0.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
/**//// <summary>
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
/// Summary description for NameFactory.
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
/// </summary>
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
public class NameFactory
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
public NameFactory()
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/3112b7b6526db5bc83e275260ae60525.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030173/f2671b7f42ce505d9bf55a7a0ca257fb.gif)
public static Namer getName(string name)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
int i = name.IndexOf (",");
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
if(i > 0)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
return new LastFirst (name);
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
else
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
return new FirstFirst (name);
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030189/4fd96b3cf02f4c7b5c8964ac8167f7af.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
5:调用者,一个窗体,如图:
![](https://oscdn.geek-share.com/Uploads/Images/Content/202002/24/fc87b5a548e5ae63c0ccd187e973fd01.gif)
按钮的响应事件代码如下:
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/34031c708bfe702fe82d01ff5c6593aa.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/0be121fa5b8988fbabbbc526af3b0fc0.gif)
private void btCompute_Click(object sender, System.EventArgs e)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/b854634c0904529d4018c4c3336be836.gif)
{
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
Namer nm = NameFactory.getName (txName.Text );
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
txFirst.Text = nm.getFrname ();
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
txLast.Text = nm.getLname ();
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030189/4fd96b3cf02f4c7b5c8964ac8167f7af.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
程序并不复杂,运行不运行无所谓,关键是要搞清楚Factory所起的作用:他隐藏了Namer类的创建细节,调用者始终不知道他创建的是哪一个类,也不需要关心他调用的方法是哪一个子类的。如果以后的程序的需求发生改动,比如:某国的人不仅有First Name和Last Name,还有Mid Name,就可以很方便的进行扩充,添加一个Namer的子类,修改一下Factory。调用者甚至不知道有新加了一种Namer的类型。
相关文章推荐
- .NET实用设计模式:工厂模式(Factory)
- .NET实用设计模式:工厂模式(Factory)
- .NET实用设计模式:工厂模式(Factory)
- .NET实用设计模式:工厂模式(Factory)
- .NET实用设计模式:工厂模式(Factory)
- 设计模式 工厂方法(Factory Method Pattern)转载
- 设计模式(一)工厂模式Factory(创建型)
- 设计模式第二节:Factory Method(工厂方法)
- 设计模式(一)工厂模式Factory(创建型)
- Php设计模式之工厂模式(二)【工厂方法模式 Factory Method】
- 设计模式(二)-简单工厂(Simple Factory)模式
- 学习php设计模式 php实现工厂模式(factory)
- 设计模式四:Factory method工厂方法——对象创建型模式
- 设计模式之简单工厂(Factory method)
- 设计模式之3 - 工厂方法Factory Method
- 设计模式(1)の创建型の工厂方法模式(Factory Method)の(普通|简单)工厂模式
- JAVA设计模式(01):创建型-工厂模式【简单工厂模式】(Simple Factory)
- 设计模式之Factory Method(工厂方法)
- 设计模式的征途—3.工厂方法(Factory Method)模式
- 设计模式(1)-工厂方法(Factory Method)