When user TO and BO

I'm writing a web app using Struts or JSF, and Hibernate / MySQL for persistance. Do you think it's worth it to make Transfer Objects and Business Objects, or just have a model object that has fields / getters / setters / business logic? Either way, there'd be a DAO layer to handle the interaction with Hibernate.
From what I've read of patterns, there doesn't seem to be much benefit from using TO's and BO's you're not using EJB. To me, it seems like it's just another layer that doesn't really buy me anything. Am I missing something? Does it really matter if I pass a model object or a TO to my DAO?
Thanks in advance.

I had searched around, but most of the discussion
seemed to be around EJB based applications, and I was
wondering what people thought for a non-EJB
application.
Basically, I know that it's "a bad thing" to pass an
object with business logic on it to a DAO, but if
it's going to be my object, and my DAO, and my DAO's
only call getters from the objects, or just pass it
on to hibernate to save, it seems like a waste to
separate the BO and TO. At least that's the way it
seems to me, I wanted to see if someone would point
out something that I was missing.
DTOs via Java are grouped in the J2EE umbrella. I don't agree with that categorization.
I use them when ever data must be moved between disparate layers. A database layer is a layer. A GUI is a layer. But so is a communications layer. Or a log layer. Or a rules layer.
And I wouldn't focus to much on business rules as the definite concept. If you have an order entry system then the GUI should check that a new order has a delivery date that is greater than today. It shouldn't need to move to another layer (particularily across a network) to check that. But just because the GUI checks it doesn't mean that the server shouldn't do it as well. The database itself might do it too.
And DTOs can contain simple business rules (emphasis on simple) just for convienence. The Customer DTO might have a rule to validate that there actually is a non-null, non-empty customer name. It can do that because the logic check doesn't involve other business objects nor layers. But on the other hand it can't verify that the account number is unique.

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HTH
Robert Aldwinckle

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Hi
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>>when user pres n then it must go to a form but error arises and not working good and threading is not respondin
Could you post the error information? And which line caused this error？
If you want to show Form1, you can use form.show() method
Form1 frm = new Form1();
frm.Show();
In addition, Cosmos is an acronym for C# Open Source Managed Operating System. This is not Microsoft product.If the issue is related to Cosmos, it would be out of our support. Thanks for your understanding. And you need raise an issue at Cosmos site.
Best regards,
kristin
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