Spring MVC: Get Unnamed Request Parameter

Question

What is the simplest way to access an unnamed request parameter in a Spring MVC controller? Is there an annotation for this similar to @RequestParam?

HTTP Delete request with unnamed parameter:

http://localhost/myEndPoint?someUnnamedParam

Controller:

public class MyController {
    @RequestMapping(value = {"/myEndPoint"}, method = RequestMethod.DELETE)
    public void deleteThing() {
        // Do something with unnamed param
    }
}

Details: Spring 3.0.7

@GriffeyDog it is of the form ?value as opposed to ?name=value — Rylander
– Rylander, Commented Mar 31, 2014 at 18:51
@GriffeyDog I am working from a predefined API and must consume it in the form http://localhost/myEndPoint?someUnnamedParam. — Rylander
– Rylander, Commented Mar 31, 2014 at 18:56

Sotirios Delimanolis · Accepted Answer · 2014-03-31 18:56:22Z

4

I think you misunderstand.

In /myEndPoint?someUnnamedParam, you have a parameter named someUnnamedParam with a String value of "", ie. an empty String. It's parsed as an equivalent to /myEndPoint?someUnnamedParam=.

You can get a set of parameter names and use those as values.

@RequestMapping(value = {"/myEndPoint"}, method = RequestMethod.DELETE)
public void deleteThing((@RequestParam Map<String, List<String>> params) {
    Set<String> paramNames = params.keySet();
    ...
}

answered Mar 31, 2014 at 18:56

Sotirios Delimanolis

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Comments

Rylander · Accepted Answer · 2014-03-31 20:15:31Z

3

You can always use

@RequestMapping(value = {"/myEndPoint"}, method = RequestMethod.DELETE)
public void deleteThing(HttpServletRequest request) {        
    String param = request.getQueryString();
        // Do something with request
}

and perform any operations you need on request

edited Mar 31, 2014 at 20:15

Rylander

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answered Mar 31, 2014 at 18:49

geoand

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3 Comments

Rylander Over a year ago

Is there a non Java-EE alternative to HttpServletRequest? Also what method would I call on that to get the unnamed parameter?

geoand Over a year ago

@MikeRylander I see you already found the answer to your question :)

Magno C Over a year ago

Must be the accepted one because it answer the question without asking "why don't you do this in another way?"

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