Spring MVC: @ResponseBody Get method return void

Question

I have a controller method which should return some data. I'm wondering why despite it's GET and marked with @ResponseBody it's void.

@ResponseBody    
@RequestMapping(value = "/{id}/data", method = GET)
public void getData(....) { // < Question: how it can be void?
  ....
  dataService.streamData(query); // < this method is also void
}

Question: What spring returns in this case? Is this method useless?

I too looking for this response. – spandey Jan 23 '18 at 05:32 — spandey, Jan 23 '18 at 05:32
I just tested it returns null, I feel this should be avoid. – spandey Jan 23 '18 at 05:44 — spandey, Jan 23 '18 at 05:44

score 2 · Answer 1 · edited May 23 '17 at 12:06

2

If a controller returns a null view name, or declares a void return type, Spring will attempt to infer the view name from the request URL.

It does this using an implementation of RequestToViewNameTranslator, the default implementation of which is DefaultRequestToViewNameTranslator

complete info here

edited May 23 '17 at 12:06

Community

1
1

answered Jan 23 '15 at 08:29

Ankur Singhal

26,012
16
82
116

thanks. But in my case it's an API method, response of which should be parsed to `Backbone.Collection`. Actual result on client-side is `[]` – VB_ Jan 23 '15 at 08:31
@V_B then we might need to dig in deeper. – Ankur Singhal Jan 23 '15 at 08:32
moreover in your example their method returns `String`. Isn't it a case? – VB_ Jan 23 '15 at 08:32
Yeah, let's do that. What I need to check in order to dig in deeper? – VB_ Jan 23 '15 at 08:33
@V_B first of all request you add more info to your question, is it like a normal Spring MVC or Spring as rest service, maybe some service side code, or which method is calling it etc. – Ankur Singhal Jan 23 '15 at 08:37
this method is called with usual Javascript AJAX request – VB_ Jan 23 '15 at 08:38
Yeah it's an usual Spring MVC. – VB_ Jan 23 '15 at 08:39

Spring MVC: @ResponseBody Get method return void

1 Answers1