Spring MVC - Request mapping, two urls with two different parameters

Question

Is it possible in Spring to have one method with two different urls with different params for each method?

Below is pseudo code

@RequestMethod(URL1-param1, URL2-param2)
public void handleAction(@ModelAttribute("A") A a, ...) {
}

At the same time ULR1 is mapped in some other Controller as

@RequestMethod(URL1)
public void handleAction1(@ModelAttribute("A") A a, ...) {
}

Bozho · Accepted Answer · 2011-07-04T14:03:54.147

14

Update: It appears your question is completely different.

No, you can't have the same url with different parameters in different controllers. And it doesn't make much sense - the url specifies a resource or action, and it cannot be named exactly the same way in two controllers (which denote different behaviours).

You have two options:

use different URLs
use one method in a misc controller that dispatches to the different controllers (which are injected) depending on the request param.

Original answer:

No. But you can have two methods that do the same thing:

@RequestMethod("/foo")
public void foo(@ModelAttribute("A") A a) {
    foobar(a, null);
}

@RequestMethod("/bar")
public void bar(@ModelAttribute("B") B b) {
    foobar(null, b);
}

If I haven't understood correctly, and you want the same ModelAttribute, then simply:

@RequestMapping(value={"/foo", "/bar"})

And finally - if you need different request parameters, you can use @RequestParam(required=false) to list all possible params.

edited Jul 04 '11 at 14:03

answered Jul 04 '11 at 12:19

Bozho

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@svlada you avoid it by placing it in the `foobar` method. But do you need different model attributes, or you need just different urls? – Bozho Jul 04 '11 at 12:21
I need different URLs with different parameters. – svlada Jul 04 '11 at 12:22
but different request parameters, or different model attributes? – Bozho Jul 04 '11 at 12:26
Different parameters. But URL1 pattern must be present in two different controllers. – svlada Jul 04 '11 at 13:06
Then use `@RequestParam(required=false)` – Bozho Jul 04 '11 at 13:19
Well in Spring it is not possible that SAME url is present in two Different controllers :) – svlada Jul 04 '11 at 13:21
@svlada - I understood that you need _different_ urls. If you need the same url, then have one controller with multiple @RequestParam(required=false) – Bozho Jul 04 '11 at 13:38
Well that is problem. I cannot couple logic in one controller. Somehow i have to find way to map on url to two controllers, based on different parameters. – svlada Jul 04 '11 at 13:47
it is still unclear what you are trying to achieve. One or two urls? The question titles says "two urls" – Bozho Jul 04 '11 at 13:55
Maybe my question is not formulated well. I have one url and two controllers. One url must be mapped in both controllers but with different parameters. – svlada Jul 04 '11 at 13:59

score 2 · Answer 2 · answered Jul 04 '11 at 12:19

you can supply multiple mappings for your handler like this

@RequestMapping(value={"", "/", "welcome"})
public void handleAction(@ModelAttribute("A") A a, ...) { }

But if you want to use different parameters for each mapping, then you have to extract your method.

score 0 · Answer 3 · edited Jul 04 '11 at 14:40

Something like this

@RequestMapping(value={"URL1"}, method=RequestMethod.POST)
public String handleSubmit(@ModelAttribute("A") A command, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
    return helperSubmit();
}

@RequestMapping(value={"URL2"}, method=RequestMethod.POST)
public String handleSubmit(@ModelAttribute("A") A command, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
    return helperSubmit();
}

private helperSubmit() {
  return "redirect:" + someUrl;
}

Spring MVC - Request mapping, two urls with two different parameters

3 Answers3

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