Spring and Velocity - form handling

I googled it, but could not find completely full answer. How can I handle the form from Spring, if I use Velocity templates as View? Assume I have the following form:

<form action="" method="POST" id="newThreadForm">
    <input type="text" placeholder="Title" id="title"/>
    <input type="text" placeholder="Author" id="author"/>
    <input type="text" placeholder="E-mail" id="email">
    <!-- other fields... -->
</form>

And have a simple class:

public class Post {
    private int id;
    private String author;
    private String email;
    private String title;
    //other fields

    //getters and setters
}

How can I convert the data that user types in the form to Post object in my Controller method?

 @RequestMapping(value="path/to/", method=RequestMethod.POST)
 public String newThread(Model model) {
     //what should be there?
     return "view-name"; 
 }

Do I need to create a new class, smth like public class NewThreadForm? Add BindingResult argument to the method? Or what should I do? Thanks for answers.