Can Spring MVC handle multivalue query parameter?

Question

Having this http://myserver/find-by-phones?phone=123&phone=345 request, is it possible to handle with something like this:

@Controller
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Answer 1

Spring can convert the query param directly into a List or even a Set

for example:

 @RequestParam(value = "phone", required = false) List<String> phones

or

 @RequestParam(value = "phone", required = false) Set<String> phones

Answer 2

"Arrays" in @RequestParam are used for binding several parameters of the same name:

phone=val1&phone=val2&phone=val3

-

public String method(@RequestParam(value="phone") String[] phoneArray){
    ....
}

You can then convert it into a list using Arrays.asList(..) method

EDIT1:

As suggested by emdadul, latest version of spring can do like below as well:

public String method(@RequestParam(value="phone", required=false) List<String> phones){
    ....
}

Answer 3

I had an issue with indexed querystring like

http://myserver/find-by-phones?phone[0]=123&phone[1]=345

and only handling with

MultiValueMap<String, String>

worked for me. Neither List or String[] were handling it properly.

I also tried

@RequestParam("phones[]")

but RequestParamMethodArgumentResolver is looking explicitly for phones[] ignoring indexes. So that is why I decided to let RequestParamMapMethodArgumentResolver handle it.