How to validate a form in Spring MVC 3?

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[mr.techno-era]

I have used HTML form, and does not used path attribute as you mentioned in video, so, how do i validate that form fields?
ex.
<form action="insertStudent.html" method="post">
<input type="text" name="studentName" id="studentName" />
<input type="submit" value="save">
</form>