创建型设计模式之工厂模式(Abstract Factory)
2024-09-24 23:13:18
| 结构 |  |
| 意图 | 提供一个创建一系列相关或相互依赖对象的接口，而无需指定它们具体的类。 |
| 适用性 |
|
using System;
// These classes could be part of a framework,
// which we will call DP
// ===========================================
abstract class DPDocument
{
abstract public void Dump();
}
abstract class DPWorkspace
{
abstract public void Dump();
}
abstract class DPView
{
abstract public void Dump();
}
abstract class DPFactory
{
abstract public DPDocument CreateDocument();
abstract public DPView CreateView();
abstract public DPWorkspace CreateWorkspace();
}
abstract class DPApplication
{
protected DPDocument doc;
protected DPWorkspace workspace;
protected DPView view;
public void ConstructObjects(DPFactory factory)
{
// Create objects as needed
doc = factory.CreateDocument();
workspace = factory.CreateWorkspace();
view = factory.CreateView();
}
abstract public void Dump();
public void DumpState()
{
if (doc != null) doc.Dump();
if (workspace != null) workspace.Dump();
if (view != null) view.Dump();
}
}
// These classes could be part of an application
class MyApplication : DPApplication
{
MyFactory myFactory = new MyFactory();
override public void Dump()
{
Console.WriteLine("MyApplication exists");
}
public void CreateFamily()
{
MyFactory myFactory = new MyFactory();
ConstructObjects(myFactory);
}
}
class MyDocument : DPDocument
{
public MyDocument()
{
Console.WriteLine("in MyDocument constructor");
}
override public void Dump()
{
Console.WriteLine("MyDocument exists");
}
}
class MyWorkspace : DPWorkspace
{
override public void Dump()
{
Console.WriteLine("MyWorkspace exists");
}
}
class MyView : DPView
{
override public void Dump()
{
Console.WriteLine("MyView exists");
}
}
class MyFactory : DPFactory
{
override public DPDocument CreateDocument()
{
return new MyDocument();
}
override public DPWorkspace CreateWorkspace()
{
return new MyWorkspace();
}
override public DPView CreateView()
{
return new MyView();
}
}
/// <summary>
/// Summary description for Client.
/// </summary>
public class Client
{
public static int Main(string[] args)
{
MyApplication myApplication = new MyApplication();
myApplication.CreateFamily();
myApplication.DumpState();
return ;
}
}
工厂模式
| 名称 | Factory Method |
| 结构 |  |
| 意图 | 定义一个用于创建对象的接口，让子类决定实例化哪一个类。Factory Method 使一个类的实例化延迟到其子类。 |
| 适用性 |
|
using System;
// These two classes could be part of a framework,
// which we will call DP
// ===============================================
class DPDocument
{
}
abstract class DPApplication
{
protected DPDocument doc;
abstract public void CreateDocument();
public void ConstructObjects()
{
// Create objects as needed
// . . .
// including document
CreateDocument();
}
abstract public void Dump();
}
// These two classes could be part of an application
// =================================================
class MyApplication : DPApplication
{
override public void CreateDocument()
{
doc = new MyDocument();
}
override public void Dump()
{
Console.WriteLine("MyApplication exists");
}
}
class MyDocument : DPDocument
{
}
/// <summary>
/// Summary description for Client.
/// </summary>
public class Client
{
public static int Main(string[] args)
{
MyApplication myApplication = new MyApplication();
myApplication.ConstructObjects();
myApplication.Dump();
return ;
}
}
工厂方法
最新文章
- logstash输出到influxdb
- Watir、Selenium2、QTP区别
- 细说LastLogonTimeStamp
- [UML]转：UML类图集中关系的总结
- 腾讯微博模拟登陆+数据抓取(java实现)
- [CCF2015.12]题解
- gb2312和UTF-8的区别
- Servlet 下载文件
- kubernetes学习第一篇-k8s安装以及HelloWorld
- [蓝桥杯]PREV-22.历届试题_国王的烦恼
- mysql错误集合
- linux下安装oracle及weblogic
- 检测到在集成的托管管道模式下不适用的ASP.NET设置
- ios 根据scrollview滑动的偏移计算滑动到第几页算法(不同需求不同计算)
- onsrcoll和scrollTop兼容与实现
- Java工程师笔试题整理[校招篇]
- python学习之路1（基本语法元素）
- Android学习记录（1）—Android中XML文件的序列化生成与解析
- java 使用htmlunit模拟登录爬取新浪微博页面
- iOS学习笔记06-手势识别