How to validate if an ActionForm has changed in Struts (Java)?

which is the best option to validate if an ActionForm has changed (the user changed one or more values in it inputs on the jsp) in Struts?

the ActionForm has a lot of instance variables, including lists.


Struts doesn't have a form validation that determines changes.

You can try and keep a previous form in a session and do a comparison between the previous action form and the current form.

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