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charishma gottumukkula
Greenhorn

Joined: Nov 06, 2006
Posts: 20
Difference between actionform in struts and value objects
Merrill Higginson
Ranch Hand

Joined: Feb 15, 2005
Posts: 4864
A Value object or data transfer object (DTO) is a Plain Old Java Object (POJO) that is used to transfer information between the model layer and the view layer. An ActionForm belongs strictly to the view layer, and acts as a Java representation of an individual JSP page.

One might think "Hey, these two objects look similar. Why not just use the ActionForm as a DTO?"

This is not a good idea. Using an ActionForm as a DTO introduces a dependency on Struts into your Model layer. Model objects should maintain independence from any type of view logic or view platform.


Merrill
Consultant, Sima Solutions
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: struts
 
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