�??xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>&#22269;&#20135;&#31934;&#21697;&#19968;&#21306;&#20108;&#21306;&#20037;&#20037;&#31934;&#21697;&#28073;&#29233;&#13;&#44;&#57;&#55;&#31934;&#21697;&#22269;&#20135;&#57;&#55;&#20037;&#20037;&#20037;&#20037;&#20037;&#20813;&#36153;&#44;&#22269;&#20135;&#31934;&#21697;&#120;&#120;&#120;&#120;&#22269;&#20135;&#21943;&#27700;&#20122;&#27954;&#22269;&#20135;&#31934;&#21697;&#26080;&#30721;&#20037;&#20037;&#19968;&#21306;&#13;</title><link>http://www.shnenglu.com/iuranus/category/4276.html</link><description>&lt;br&gt;&lt;font color="#ADFF2F"&gt;Something Different�Q�Something New&lt;/font&gt;</description><language>zh-cn</language><lastBuildDate>Mon, 23 Feb 2009 05:04:01 GMT</lastBuildDate><pubDate>Mon, 23 Feb 2009 05:04:01 GMT</pubDate><ttl>60</ttl><item><title>Command Pattern: We used but we didn't recognize</title><link>http://www.shnenglu.com/iuranus/archive/2009/02/20/74451.html</link><dc:creator>攀�?/dc:creator><author>攀�?/author><pubDate>Fri, 20 Feb 2009 13:00:00 GMT</pubDate><guid>http://www.shnenglu.com/iuranus/archive/2009/02/20/74451.html</guid><wfw:comment>http://www.shnenglu.com/iuranus/comments/74451.html</wfw:comment><comments>http://www.shnenglu.com/iuranus/archive/2009/02/20/74451.html#Feedback</comments><slash:comments>2</slash:comments><wfw:commentRss>http://www.shnenglu.com/iuranus/comments/commentRss/74451.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/iuranus/services/trackbacks/74451.html</trackback:ping><description><![CDATA[<p><span><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Class A wanna class B do what he want to (command).&nbsp;Simple way,&nbsp;invoke B's method, that's a good idea, but&nbsp;don't follow the&nbsp;OO principle: decouple</span></p>
<p><span>How to do it?&nbsp;&nbsp;<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Firstly, B is a stable class; he can in charge of all his responsibility. Maybe there are too many classes like B that A wants to invoke. So how to do it, A composition or aggregation all classes that he needs? Of course not, too much dependence with A. So let&#8217;s think about this with OO principle: Encapsulate What Varies.</span>&nbsp;</p>
<p><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>There are many unpredictable commands that are the variety in this case. We need to encapsulate the command and plugin to A. So at that time, A just knows he is invoking a command, and doesn&#8217;t know who and how to execute that command.</span></p>
<p><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>Secondly, how to plugin to A. I don&#8217;t wanna talk about DI or Java mechanism. I am handling C++, so just add a method named SetCommand(Command* pCommand) to A, that's fine.</span></p>
<p><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>Lastly, I showed a UML figure 1-1 that described all the means.</span></p>
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<img src="http://www.shnenglu.com/images/cppblog_com/iuranus/CommandPattern.jpg" border=0></p>
<p><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Figure 1-1&nbsp;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; </span>Everybody&#8217;ll shout: that is command pattern. &nbsp;Yes.</span></p>
<p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; As the title said: we used but we didn't recognize. So let&#8217;s start with its official definition:</span></p>
<p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The Command Pattern encapsulate a request as an object, thereby letting you parameterize other objects with different request, queue or log requests, and support undoable operations.</span></p>
<img src ="http://www.shnenglu.com/iuranus/aggbug/74451.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/iuranus/" target="_blank">攀�?/a> 2009-02-20 21:00 <a href="http://www.shnenglu.com/iuranus/archive/2009/02/20/74451.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>模式应用(�? 俄罗斯方块设计的思�?用OO的思想</title><link>http://www.shnenglu.com/iuranus/archive/2008/12/28/70593.html</link><dc:creator>攀�?/dc:creator><author>攀�?/author><pubDate>Sun, 28 Dec 2008 15:36:00 GMT</pubDate><guid>http://www.shnenglu.com/iuranus/archive/2008/12/28/70593.html</guid><wfw:comment>http://www.shnenglu.com/iuranus/comments/70593.html</wfw:comment><comments>http://www.shnenglu.com/iuranus/archive/2008/12/28/70593.html#Feedback</comments><slash:comments>16</slash:comments><wfw:commentRss>http://www.shnenglu.com/iuranus/comments/commentRss/70593.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/iuranus/services/trackbacks/70593.html</trackback:ping><description><![CDATA[<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;大学的时候看同学用C写的俄罗斯方块，今天�?j��)血来潮�Q�突然想设计下用OO的思想来设计下。俄�|�斯方块是一以前俄罗斯的计算机科学家自己开发娱乐的���游戏，没想到后来这么流行�?br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;像俄�|�斯�Q�Tetris�Q�方块，�q�宫�Q�推���子�q�种���游戏，其实建模都差不多�Q�这里我选择一�?�l�数�l?0&#215;20的来代表整个游戏区域的显�C�点,0代表该位�|�空�Q?代表有方块�?每一个数�l���|��a[2][4]�Q�代表屏�q�上的一个像素，数组�c�M��于：(x��)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a[20][10] = { {0, 0, 0, 0, 0, 0, 0, 0, 0, 0},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{0, 0, 0, 0, 0, 0, 0, 0, 0, 0},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{0, 0, 0, 0, 0, 0, 0, 0, 0, 0},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{0, 0, 0, 0, 0, 0, 0, 0, 0, 0},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{0, 0, 0, 0, 0, 0, 0, 0, 0, 0},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{0, 0, 0, 0, 0, 0, 0, 0, 0, 0},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{0, 0, 0, 0, 0, 0, 0, 0, 0, 0},<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.........................................<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;�q�里有几个简单的判断�Q?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. 判断是不是方块撞到墙上，���是看a[i-1]中i-1是不�?lt;0或i+1是不�?gt;10;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. 判断一层能不能clear�Q?���是每行是不是数�l�值都�?<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;int k = 0;&nbsp;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;for(int i=0; i&lt;20; i++){<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;for(int j = 0; j&lt;10; j++){<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if(a[i][j] == 1)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;k++;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if(k==10)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ClearRow(i);&nbsp;&nbsp; //把数�l�第i行全�|?<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3......其它的判断类�?br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;好，具体的设计思想参考图1-1<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<img src="http://www.shnenglu.com/images/cppblog_com/iuranus/Tetrix.jpg" border=0>&nbsp;<br></p>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;�?-1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;在游戏操作中�Q�有六个键， 上下左右�Q�左��x��转，&nbsp;该图中Form是边界类与UI和用��h��制打交道�Q�Handler业务控制�c�， ManageArray操作singleton数组和控制一些比较复杂算法的�c�R�?br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;首先该设计把整个业务���法�{�等从界面分���d���Q�不���你用什么Iphone的UI的SDK�q�是android的，&nbsp;都没问题�?nbsp;他们只与我们的UIForm打交道�?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;再次�q�边的Singleton模式把数�l�暴露给惌���他的�E�序�?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;最后用�{�略模式把旋转的���法分开�Q�每个算法只兛_��(j��)自己怎么变化�Q�想扩展���加一个类�Q�如果一个算法要修改�Q�那么只修改某一个方法。开闭原则�?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;望各位博友指�?br>&nbsp;&nbsp;&nbsp;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
<img src ="http://www.shnenglu.com/iuranus/aggbug/70593.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/iuranus/" target="_blank">攀�?/a> 2008-12-28 23:36 <a href="http://www.shnenglu.com/iuranus/archive/2008/12/28/70593.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>模式应用(一) 软�g架构</title><link>http://www.shnenglu.com/iuranus/archive/2007/12/10/38189.html</link><dc:creator>攀�?/dc:creator><author>攀�?/author><pubDate>Mon, 10 Dec 2007 11:32:00 GMT</pubDate><guid>http://www.shnenglu.com/iuranus/archive/2007/12/10/38189.html</guid><wfw:comment>http://www.shnenglu.com/iuranus/comments/38189.html</wfw:comment><comments>http://www.shnenglu.com/iuranus/archive/2007/12/10/38189.html#Feedback</comments><slash:comments>4</slash:comments><wfw:commentRss>http://www.shnenglu.com/iuranus/comments/commentRss/38189.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/iuranus/services/trackbacks/38189.html</trackback:ping><description><![CDATA[<p align=left>&nbsp; </p>
<p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;关于�q�篇文章我一直想写，但每�ơ��L��没有一个闲下来的时��_(d��)��现在试着挤每天的闲暇旉���一点点完成�?/span></p>
<p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;一直以来我都想做一个��Y件架构师�Q�所以我在��^时的开发中除了(ji��n)保证写出高质量的代码外，�q�会(x��)从架构者的角度来仔�l�推敲整个应用。当然了(ji��n)�q�个架构主要是指的代码的架构�Q�那么推敲的依据主要来自三个地方�Q?/span></p>
<p><span>1</span><span>�Q?/span><span>GRASP</span></p>
<p><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>每当遇到软�g分层�Q�类��g��业务逻辑攑֜�那个�c�d��个层�{�问题时�Q�我通常都会(x��)参�?/span><span>GRASP</span><span>�Q?/span><span>General Responsibility Assignment Software Pattern</span><span>。包括以下几个原则：(x��)</span></p>
<p><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>A</span><span>�Q?/span><span>Information Expert </span><span>信息专家</span></p>
<p><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>B</span><span>�Q?/span><span>Creator </span><span>创徏�?/span></p>
<p><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>C</span><span>�Q?/span><span>Low Coupling&nbsp;</span><span>低耦合</span></p>
<p><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>D</span><span>�Q?/span><span>High Cohesion&nbsp;</span><span>高内�?/span></p>
<p><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>E</span><span>�Q?/span><span>Controller </span><span>控制�?/span></p>
<p><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>F</span><span>�Q?/span><span>Polymorphism </span><span>多�?/span></p>
<p><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>G</span><span>�Q?/span><span>Pure Fabrication </span><span>�U�虚�?/span></p>
<p><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>H</span><span>�Q?/span><span>Indirection </span><span>间接�Q�避免对象间直接耦合�Q�合理分配职�?/span></p>
<p><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>G</span><span>�Q?/span><span>Protected Variations </span><span>受保护变化：(x��)开闭原则�?/span></p>
<p><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>虽说每个思想懂，但真正能用在实际开发中�q�是有一定难度的�Q�具体的介绍可以参考大�?/span><span>CRAIG LARMAN</span><span>的�?/span><span>UML</span><span>与模式应用》�?/span></p>
<p><span>2</span><span>�Q?/span><span>Design Patterns</span></p>
<p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;古�h�l�剑分三层境界。第一层是每个招式都熟��C���?/span><span>, </span><span>没事���拿出来�l�练�Q�比武时按照自己的套路出剑，�W�二层就是没有招式，只有思想�Q�假如想解掉别�h的剑�Q�那目标���是解剑�Q�随便出剑都可以做到。第三层���是人剑合一�Q�这�U�境界就已经不依赖与剑了(ji��n)�Q���n边的��M��物体包括自己都可以是一把剑�Q�都可以�|�对方于��d���?/span></p>
<p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;世间万物皆相通，我认为模式的学习(f��n)也是有三�U�阶�D�，</span><span>23</span><span>�U�模式熟��C���?j��)，遇到具体��目套相对应的设计模式，虽然有点��L���Q�但�l���Y件的�l�护和扩展带来很大好处，�q�是学习(f��n)设计模式的第一层。第二层���是大脑中已�l�没有具体的模式�Q�只知道如果要解耦，那么���p��样做�Q�如果追求运行速度�Q�就那样做，�q�就不一定是</span><span>23</span><span>�U�模式的一�U�了(ji��n)。如果已�l�有前两层的功力�Q�那���p���q�求�����计模式合一�Q�这时就有很多变化，创造模式，不会(x��)依赖与语�a�</span><span>(C, C++, JAVA</span><span>�{�等</span><span>)</span><span>�Q�各个领域的设计模式�{�等。估�?/span><span>Erich Gamma</span><span>应该��C��(ji��n)�W�三层境界了(ji��n)吧�?/span></p>
<p><span>3. </span><span>我的前辈</span></p>
<p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;他们在这斚w��很有�l�验�Q�架构这个东西就是��^时要�U�篏丰富��目�l�验�Q�看看国外的一个个大牛�Q�都不是</span><span>40</span><span>多岁的�h�Q�所以我���很讨厌某些�a������软�g是吃青春饭的</span><span>&#8230;</span></p>
<p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;在正常的情况�Q�在我看来，现在的��Y件设计从大的角度来讲���是复用�Q?/span><span>Reuse</span><span>�Q�，从小的角度来讲就是解�?/span><span>(Decouple</span><span>或�?/span><span>separate concern)</span><span>。作��Z��名优�U�的程序员�Q�开发一�?/span><span>App</span><span>�Q�写一句代码都要考虑��C��写的�q�个�c�M��其它�cȝ��关系�Q�是不是多余的依赖，适不适合扩展�{�等。由于这�D�|��间工作的需要，我接�q��{�?ji��n)三个项目，目睹了(ji��n)每个项目架构的优缺点，加之前不久我又进行�?ji��n)</span><span>IJC</span><span>关于</span><span>RUP</span><span>的培训，�?/span><span>IJC</span><span>�?/span><span>David</span><span>和蒋胜老师深入的讨��Z��(ji��n)软�g开发过�E�，所以我��x��学到的一些设计方法�D个例子来说明�?/span></p>
<p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;在进入主题之前我惛_��叙述一些概��c(di��n)�?/span></p>
<p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;概念</span><span>1</span><span>�Q�由面向�q�程到面向对象绝�Ҏ(gu��)��一个质的飞跃，我认�?/span><span>OO</span><span>最大的优点在于它的�E�序设计和现实世界是相对应的�Q�从</span><span>23</span><span>�U�设计模式的名字上面也有体现。工厂，代理�Q�适配器等�{��?/span></p>
<p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;概念</span><span>2</span><span>�Q?/span><span>MVC</span><span>�Q?/span><span>Model-View-Controller</span><span>�Q�模�?/span><span>�?/span><span>视图</span><span>�?/span><span>控制器模式）(j��)用于表示一�U���Y件架构模式。它把��Y件系�l�分��Z��个基本部分：(x��)模型�Q�英�?/span><span>:Model</span><span>�Q�，视图�Q?/span><span>View</span><span>�Q�和控制�Q?/span><span>Controller</span><span>�Q��?/span><span>视图</span><span>(View)</span><span>代表用户交互界面�Q�控�?/span><span>(Controller)</span><span>可以理解���模型与视图匚w��在一��P��共同完成用户的请求。模型主要是指业务流�E�的具体�l�节�Q�整个过�E�如�?/span><span>1</span><span>。那么其实在实际的开发中</span><span>MVC</span><span>�q�是有很多局限性的�Q�后面会(x��)通过一个例子给��Z��个我的改�q�版�?/span></p>
<p>&nbsp;
<div align=center src_cetemp="/images/cppblog_com/iuranus/mvc.JPG"><img height=254 alt="" src="http://www.shnenglu.com/images/cppblog_com/iuranus/mvc.JPG" width=514 border=0></div>
<p>&nbsp;</p>
<p align=center><span>�?/span><span>1</span></p>
<p><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span>&nbsp;&nbsp;&nbsp;概念</span><span>3</span><span>�Q?/span><span>RUP</span></p>
<p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;RUP</span><span>�Q?/span><span>Rational Unified Process</span><span>�Q�统一软�g开发过�E�，�l�一软�g�q�程</span><span>)</span><span>是一个面向对象且��Z���|�络的程序开发方法论。根�?/span><span>Rational(Rational Rose</span><span>和统一建模语言的开发�?/span><span>)</span><span>的说法，好像一个在�U�的指导者，它可以�ؓ(f��)所有方面和层次的程序开发提供指导方针，模版以及(qi��ng)事例支持�?/span><span> RUP</span><span>和类似的产品</span><span>--</span><span>例如面向对象的��Y件过�E�（</span><span>OOSP</span><span>�Q�，以及(qi��ng)</span><span>OPEN Process</span><span>都是理解性的软�g工程工具</span><span>--</span><span>把开发中面向�q�程的方面（例如定义的阶�D�，技术和实践�Q�和其他开发的�l��g�Q�例如文���，模型�Q�手册以�?qi��ng)代码等�{�）(j��)整合在一个统一的框架内�?/span></p>
<p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;抓其�_�N�����是使整个开发过�E�统一�Q�可���理。用例驱动，以架构�ؓ(f��)中心(j��)�Q�增量与�q�代�Q�是</span><span>RUP</span><span>的主要思想�?/span><span>RUP</span><span>是一个很复杂的过�E�，但好在它在每个项目中使用时可以因地制宜，有效的裁减可以��</span><span>RUP</span><span>在工�E�中发挥最大的威力。作��Z��个程序员�Q�我首先要关�?j��)的是有关代码架构的问题�Q?/span><span>RUP</span><span>有一个核�?j��)的思想</span><span>Separate concern</span><span>�Q�也���是分离��x��炏V��这也刚好体��C��(ji��n)面向对象的一个思想�Q�解耦。那�?/span><span>RUP</span><span>中最能体现它</span><span>Separate concern</span><span>的应该就���它�?/span><span>Minimal</span><span>�?/span><span>Extension</span><span>�?ji��n)，当然�q�有一些其它的体现方式�Q�我�?x��)在下篇实例中详�l�介�l��?/span></p>
<p align=center><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;���单来�?/span><span>Minimal</span><span>指的是那些上不依赖于表现层，下不依赖于数据库�Q�操作系�l�等</span><span>,</span><span>可以在�Q何环境下�q�行的纯业务逻辑�E�序�Q�最主要的还�?/span><span>Minimal</span><span>部分的代码可以复用�?/span><span>Extension</span><span>包括</span><span>Minimal</span><span>�Q�它依赖于某个特定的底层�E�序或者操作系�l��?/span><span>Minimal</span><span>�?/span><span>Extension</span><span>�c�M��于图</span><span>2</span><span>的关�p�R�?br><img height=159 alt="" src="http://www.shnenglu.com/images/cppblog_com/iuranus/Extension.JPG" width=241 border=0><br><br>�?</span></p>
<img src ="http://www.shnenglu.com/iuranus/aggbug/38189.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/iuranus/" target="_blank">攀�?/a> 2007-12-10 19:32 <a href="http://www.shnenglu.com/iuranus/archive/2007/12/10/38189.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>设计为先,�~�码在后</title><link>http://www.shnenglu.com/iuranus/archive/2007/01/22/17889.html</link><dc:creator>攀�?/dc:creator><author>攀�?/author><pubDate>Mon, 22 Jan 2007 08:32:00 GMT</pubDate><guid>http://www.shnenglu.com/iuranus/archive/2007/01/22/17889.html</guid><wfw:comment>http://www.shnenglu.com/iuranus/comments/17889.html</wfw:comment><comments>http://www.shnenglu.com/iuranus/archive/2007/01/22/17889.html#Feedback</comments><slash:comments>3</slash:comments><wfw:commentRss>http://www.shnenglu.com/iuranus/comments/commentRss/17889.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/iuranus/services/trackbacks/17889.html</trackback:ping><description><![CDATA[<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;�W�二个项目的设计是终于结束了(ji��n)�Q�今天老大看了(ji��n)下通过�Q�开始编码。呵呵呵�Q�另一个巨大的工程要开始了(ji��n)�Q�但是这个不恐怖�?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;在学校每�ơ开发的时候都说先设计再编�E�，但到真正开始的时候就�׃��(ji��n)�Q�编码完成后再说�Q�编码完后，文���乱写两下��׃��工了(ji��n)�Q�所以说以前�Ҏ(gu��)��没有设计�q�什么，��D��我这�ơ做的比较吃力�?img height=19 src="http://www.shnenglu.com/Emoticons/cry_smile.gif" width=19 border=0><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;说真的这个rose�q�不错，以前���切的说是不�?x��)用�Q�这�ơ用它画�?ji��n)类图，时序图，让我寚w��向对象认识又深刻�?ji��n)一点，�ȝ��下这几天学到的东西：(x��)<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;�Q�．�Q��݋�Q�中�c�d��与时序图的画法，搞清楚关联的几种表达�Ҏ(gu��)���Q�对四种视图有了(ji��n)大体认识�?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;�Q�．ROSE的基本��用，包括��d���Q�分包，��g��码�?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;�Q�．大部分��用了(ji��n)�l�承�Q�组合这两种基本设计模式�Q�感觉比较麻�?ch��)�?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;�Q�．基本搞清�Q���u�Q�L(f��ng)���E�序�l�构�Q�可以实现基本的�Q�ﾃ�?br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;当然通过�q�几天学�?f��n)，也发现自��p��有很多不���I��最�q�切的事有：(x��)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;�Q�．学日语，�l�的文���是日文的�Q�虽说基本能看懂�Q�但是让我认识到���来�q�有很多时候会(x��)有这�U�情况，所以还是好好把日语学吧�Q?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;�Q�．�Q�Ｄ�Q�，很大的概念，很想学的东西�Q�但是不�?x��)吧�Q�过几天工资发了(ji��n)买几本书看看�?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;�Q�．设计模式也要研究呀�Q�在设计�cȝ��时候，我一直在惻I���q�样做好�q�是那样做好�Q�就用基本的�l�承�Q�组合套工程呀�Q�没有什么��u�Q���E�Q�_(d��)���QԌ���Q���I�Q�Ｐ�Q�Ｒ�Q�的思想�Q�这个确实的研究�?ji��n)�?br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;基本���p��些了(ji��n)�Q�休息的差不多了(ji��n)�Q�写代码吧�?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;再说一个开�?j��)的事，昨天晚上��Z��(ji��n)不让�Q���E看电(sh��)影，���q��她买�?ji��n)个十字�l�，她玩的蛮高兴�Q�呵呵！</p>
<img src ="http://www.shnenglu.com/iuranus/aggbug/17889.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/iuranus/" target="_blank">攀�?/a> 2007-01-22 16:32 <a href="http://www.shnenglu.com/iuranus/archive/2007/01/22/17889.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title> 保持架构�E�_��--面向接口的编�E?/title><link>http://www.shnenglu.com/iuranus/archive/2006/12/31/17091.html</link><dc:creator>攀�?/dc:creator><author>攀�?/author><pubDate>Sun, 31 Dec 2006 07:58:00 GMT</pubDate><guid>http://www.shnenglu.com/iuranus/archive/2006/12/31/17091.html</guid><wfw:comment>http://www.shnenglu.com/iuranus/comments/17091.html</wfw:comment><comments>http://www.shnenglu.com/iuranus/archive/2006/12/31/17091.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/iuranus/comments/commentRss/17091.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/iuranus/services/trackbacks/17091.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; 接口把定义与实现分离�Q�它反映�?ji��n)系�l�设计�h员对�pȝ��的抽象理解，它可以把模块�l��g化，利于模块之间的交互，�q�次��目构架个框�Ӟ��但是�Ҏ(gu��)��来说真的有点难，��׃���q�个面向接口的编�E�开始吧�?br>在设计模式中真的很重视实��C��接口分离�Q�原因有下面几个�Q?br>1. 对一般的�E�序员来��_(d��)��他们不需要知道具体的实现�Q�只需要清楚接口发布出的方法就可以�?ji��n)�?br>2.因�ؓ(f��)接口是需求中比较�E�_��的部分，而实现则是和具体的环境相兌���的，只要满��接口�Q�其它��Y件开发团队同栯���够开发出合用的应用来。在当前�q�样一个讲求合作、讲求效率的大环境中。这�U�开发方法是非常重要的�?
<img src ="http://www.shnenglu.com/iuranus/aggbug/17091.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/iuranus/" target="_blank">攀�?/a> 2006-12-31 15:58 <a href="http://www.shnenglu.com/iuranus/archive/2006/12/31/17091.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item></channel></rss>                                                                                                                           <footer>
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