Spring MVC populate @RequestParam Map

Question

I have the following method in my Spring MVC @Controller :

@RequestMapping(method = RequestMethod.GET)
public String testUrl(@RequestParam(value=\"test\") Ma         


        

Answer 1

Spring doesn't have default conversion strategy from multiple parameters with the same name to HashMap. It can, however, convert them easily to List, array or Set.

@RequestMapping(value = "/testset", method = RequestMethod.GET)
    public String testSet(@RequestParam(value = "test") Set test) {

        return "success";
    }

I tested with postman like http://localhost:8080/mappings/testset?test=ABC&test=DEF

You will see set having data, [ABC, DEF]