Difference between modelAttribute and commandName [duplicate]

Question

What is the difference between using commandName and modelAttribute when sending form data?

<form:form method="post" modelAttribute="csvFileUploadVO"> 

and

<form:form method="post" commandName="csvFileUploadVO"> 

At which point of time should I use either of them?

Answer 1

There is no difference, two different attributes exist for historical reasons.