Spring MVC how to handle binding when editing objects

I'm kind of newbie with Spring MVC - I have seen tons of tutorials so far, but just started developing. I've just come across this problem:

SUMMARY: I have a form with a table containing lots of users loaded from DB and backed in the spring model. I want to have an edit button for each user, and I want to bring up another form in order to edit that user, and still having that user backed in the model so I don't have to disclose id's or map users to random keys.

I have a List<User> object that I retrive from database through a @Service bean, and then I pass this list to my UserController bean. Then, in my controller:

@RequestMapping(value="/users", method = RequestMethod.GET)
public ModelAndView showUsers() {       
    List<User> users = userService.getUserList(); //Get from DB. Returns some users.
    UserSet uset = new UserSet(); //Custom object backing the list.
    uset.setUserList(users);

    return new ModelAndView("users", "userset", uset);
}

This returns the view users.jsp and displays the user list in a table using a form:

<form:form action="#" method="post" modelAttribute="userset">
    <table>
        <tr>
            <th>N.</th>
            <th>Name</th>
            <th>Email</th>
        </tr>
        <c:forEach var="user" items="${userset.userList}"
            varStatus="status">
            <tr>
                <td align="center">${status.count}</td>
                <td><input name="userList[${status.index}].name"
                    value="${user.name}" id="name_${status.index}" /></td>
                <td><input name="userList[${status.index}].email"
                    value="${user.email}" id="email_${status.index}" /></td>
                <td><input type="button" value="Ed." id="edbtn${status.index}"
                    class="edbtn" /></td>
            </tr>
        </c:forEach>
    </table>
    <input type="submit" value="Save" />
</form:form>

Now, you can see there's an edit button <input type="button" value="Ed." id="edbtn${status.index}" class="edbtn" /> for each user. What I want to do is to make a new single-user form appear when I click on that button, and have my User object binded to it, so that if I change the name and the email, I can still get the ID on the server side in order to update it in the database. The multi-user form above should have all the fields disabled or shown as labels - I don't want to change things there; I just want to show them there and have the button to open a popup or floating div with the actual single-user form inside.

By the way, I'm trying to capture the edited user with the following controller:

@RequestMapping(value="users/edit", method = RequestMethod.POST)
public String edit(@ModelAttribute(value="user") User user, BindingResult bresult) {
    /* Do something here with the user */
    /* Currently the ID returned from user.getId() is null, but the original user shown in the form has an ID != null */
    return "redirect:/users";
}

And I'm sending the edit request through jQuery:

jq("#edituserbtn").click(function() {
        jq.post("users/edit", {
            name : jq("#edfrm_n").val(),
            email : jq("#edfrm_e").val(),
        }, function(data, status) {
            //jq("#changing").text(data + "; " + status);
        });
    });

Note that #edfrm_n and #edfrm_e would be the id's of that single-user form I want to use here, instead of sending back the whole form. Using jQuery I'd also popup this single-user form and place it in front of everything, in the middle of the screen.

How can this be accomplished?

P.S.: This may not be the best approach for the editing feature. In such case, I'd really appreciate that you provided me with some hints.

Thanks