How to set default value of array to empty with @RequestParam [duplicate]

Question

So I'm having a controller method like this:

@RequestMapping(value = "/stuff, method = GET)
public StuffDTO getStuff(
        @RequestParam(value = "stuffIds") List<Integer> ids) {

I know I can provide a default value like this:

@RequestParam(value = "1,2,3")

But how do I set default value to an empty list, not to deal with null lists inside the endpoint implementation?

Innokenty · Accepted Answer · 2018-08-13 08:12:01Z

25

Just provide an empty string as a default value, no need for anything like [] etc.

@RequestMapping(value = "/stuff, method = GET)
public StuffDTO getStuff(
        @RequestParam(value = "stuffIds", defaultValue = "") List<Integer> ids) {

edited Aug 13, 2018 at 8:12

answered Aug 10, 2018 at 15:42

Innokenty

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