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作者 Strategy(策略)与工厂模式有什么区别?
james_patriot





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于 2006-07-12 09:02 user profilesend a private message to usersearch all posts byselect and copy to clipboard. 
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除了一个创建模式一个是行为模式的意义上的区别外.
其它都很相似.Strategy(策略)完全可用工厂模式来实现.
不知理解是否正确?



作者 Re:Strategy(策略)与工厂模式有什么区别? [Re:james_patriot]
floater

Java Jedi

总版主


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于 2006-07-12 22:39 user profilesend a private message to usersearch all posts byselect and copy to clipboard. 
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not quite right.

On the one hand, a lot of patterns have similar code. On the other hand, their intentions are entire different, the invariants and variants are hidden under the code.

In the strategy patten, we want to switch strategies, depending on different values of some fieldMoon. The place to switch is the tricky part, i.e., where do you want to put the switching code, e.g., in the caller's constructor, or in an if-else block, or on a method signature.



"Any fool can write code that a computer can understand. Good programmers write code that humans can understand."
- Martin Fowler, Refactoring - Improving the Design of Existing Code
作者 Re:Strategy(策略)与工厂模式有什么区别? [Re:james_patriot]
gaoxt1983





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于 2006-07-18 17:10 user profilesend a private message to usersearch all posts byselect and copy to clipboard. 
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没必要深究这个,设计的时候怎么合适就怎么用,也不是说必须用,只是在适当的时候用,工作中慢慢体会吧


作者 Re:Strategy(策略)与工厂模式有什么区别? [Re:james_patriot]
jameszhang



CJSDN高级会员


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于 2006-07-18 20:23 user profilesend a private message to usersearch all posts byselect and copy to clipboard. 
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工厂模式 种类 可多了,共同点 是 得返回 产品,呵呵,策略 可不一定,是void 也可以,只是根据条件 不同,处理策略不同, 如果说 策略 与 状态 有点象,我同意,呵呵


"First they ignore u, then they laugh at u, then they fight u, then u will win

Mahatma Gandhi"

作者 Re:Strategy(策略)与工厂模式有什么区别? [Re:james_patriot]
zj1999





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于 2008-09-22 21:57 user profilesend a private message to usersearch all posts byselect and copy to clipboard. 
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楼上说的对,
工厂模式是创建模式,返回的是一个对象给你用.
而策略模式是行为模式.它制造好对象之后,还给你这个对象的方法可以进行相应的计算和处理.




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