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Top design patterns for J2EE web applications?

 
James Adams
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I'm trying to improve my knowledge of design patterns and I'd like to find a consensus as to the most useful/prevalent design patterns for Java/J2EE web application development. What's your opinion?

--James
 
Gurumurthy Ramamurthy
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mm...well. There is no such concrete answer for this, everything depends on what nature of your project. But I find the following design patterns have been used in the industry predominantly.

1. Data Access Object (DAO)
2. Session Facade
3. Factory & Abstract Factory
4. Singleton

Thanks,
Guru
 
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