Spring MVC - Transferring the same object from one page to other

Question

In my Spring MVC application, I have 2 pages.
I have an object with 10 variables in it. In the first page, I am setting 9 variables of the above object(first page has 9 fields). I set this object in session as well as model attribute in the controller. I also need to pass this same object to the next page. In the second page, I need to set the 10th variable in the same object(second page has only one field 10th field). (why I need a second page for setting the 10th variable is - In the second page, I populate a dropdown based on the entries in the first page)

When I submit the form in the second page - I need to submit the same object with 10 variables. (I couldn't paste the code because of my company policy) Can anyone please help me in fixing this?

Answer 1

Note that both methods are in the same controller. You need to do something like this:

@Controller
@SessionAttributes("myObject")
public class SessionAttributesController {

    // Save session attribute in model. 
    @RequestMapping(value = "/page1.html", method = RequestMethod.GET)
    public String page1( @ModelAttribute MyClass myObject, ModelMap model ) {
        model.addtAttribute("myObject", myObject);
        return "page1.html";
    }

    // Now you model is having myObject, so it has to be used in jsp. You can add ModelMap parameter to this method and check what contains model in debug mode.   
    @RequestMapping(value = "/page2.html", method = RequestMethod.GET)
    public String page(ModelMap model) {
          model.get("myObject").setAttr10(value);   
          return "page2.html";
    }

}