RequestMethod POST and GET in the same Controller?

Question

First of all, here is my Controller:

@RequestMapping(value = "/esta", method = RequestMethod.POST)
public String handleRequest(HttpServletRequest request) {

    Esta estaobject = new Esta();
    // To test, if the parameters are set
    String user = request.getParameter("user");
    String name = request.getParameter("name");
    String shortname = request.getParameter("shortname");
    String was_admin_string = request.getParameter("was_admin");
    String sap_nr = request.getParameter("sap_nr");
    String etl_string = request.getParameter("etl");

    if (user != null && name != null && shortname != null && was_admin_string != null && sap_nr != null && etl_string != null) {
        some code...
    }

    request.getSession().setAttribute("esta", estaobject);

    return "esta";
}

When I visit the site, it check with the if-statement, if there are some parameters.
If not, then it should just display my form. Then, when I fill the form, it send it with POST and now there are some parameters and it goes through the if-statement.

My problem is: When I visit the site for the first time, it isn't a POST-request, so I get the error message Request method 'GET' not supported.
But change the form to a GET-request isn't a option for me. It must be POST.

So is there a solution to handle the same controller in POST and GET Requests?

Answer 1

Make it an array of method values that it gets mapped to, like so:

@RequestMapping(value = "/esta", method = {RequestMethod.POST, RequestMethod.GET})

Answer 2

Or you can write separate methods

@RequestMapping(value = {#some_vale}, method = RequestMethod.GET)
public random_method #1{
}

@RequestMapping(value = { #some_value }, method = RequestMethod.POST)
public random_method #2{
}

now you can implement your to visit the specific page and another to fill the form. Hope this will help you.