Spring RequestParam Map<String, String>

Question

I have this in my controller:

@RequestMapping(value = "/myUrl", method = RequestMethod.GET)
public String myUrl(@RequestParam(value = "test") Map<String, String> test)
{
    return test.toString();
}

And I'm making this HTTP request:

GET http://localhost:8080/myUrl?test[a]=1&test[b]=2

But in the logs I'm getting this error:

org.springframework.web.bind.MissingServletRequestParameterException: Required Map parameter 'test' is not present

How can I pass Map<String, String> to Spring?

Argb32 · Accepted Answer · 2017-01-06 22:28:39Z

3

May be it's a bit late but this can be made to work by declaring an intermediate class:

public static class AttributeMap {
    private Map<String, String> attrs;

    public Map<String, String> getAttrs() {
        return attrs;
    }

    public void setAttrs(Map<String, String> attrs) {
        this.attrs = attrs;
    }
}

And using it as parameter type in method declaration (w/o @RequestParam):

@RequestMapping(value = "/myUrl", method = RequestMethod.GET)
public String myUrl(AttributeMap test)

Then with a request URL like this: http://localhost:8080/myUrl?attrs[1]=b&attrs[222]=aaa

In test.attrs map all the attributes will present as expected.

answered Jan 6, 2017 at 22:28

Argb32

1,4059 silver badges10 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Sotirios Delimanolis · Accepted Answer · 2014-02-27 16:04:06Z

2

It's not immediately clear what you are trying to do since test[a] and test[b] are completely unrelated query string parameters.

You can simply remove the value attribute of @RequestParam to have your Map parameter contain two entries, like so

{test[b]=2, test[a]=1}

edited Feb 27, 2014 at 16:04

answered Feb 27, 2014 at 15:58

Sotirios Delimanolis

281k62 gold badges718 silver badges744 bronze badges

6 Comments

stackular Over a year ago

The documentation says that the @RequestParam should have a parameter name specified, or the map will be populated with all the request parameters: docs.spring.io/spring/docs/3.2.0.M1/api/org/springframework/web/… and that is indeed what happens. My goal is to have a map with the keys a and b, and values 1 and 2 respectively.

Sotirios Delimanolis Over a year ago

@stackular As far as I know, that is not possible by default. You'll need to write and register your own HandlerMethodArgumentResolver to do that.

Sotirios Delimanolis Over a year ago

@stackular Are the keys random? If they aren't, just use a command object.

stackular Over a year ago

Yes, the keys are arbitrary ("random").

Sotirios Delimanolis Over a year ago

@stackular AFAIK you will need then need to write your own logic to convert them to a Map (or ideally some wrapper object).

|

Collectives™ on Stack Overflow

Spring RequestParam Map<String, String>

2 Answers 2

Comments

6 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

6 Comments

Your Answer

Sign up or log in

Post as a guest

Related