Spring @RestController Get Request Content-Type to response json or html

Question

how can I take request Content-Type value? We need this to print json response or Html respone. My code is this:

 @RestController
public class GestorController {
    @RequestMapping(value="/gestores", method = RequestMethod.GET)  
    public Object gestoresHtml(@RequestParam(value="name", required=false, defaultValue="sh14") String name) throws Exception {
        String json = "prueba json";

        String contentType = ?????

        if(contentType.equals("application/json")){
            return json;
        }else{
            ModelAndView mav = new ModelAndView();
            mav.setViewName("gestores");
            mav.addObject("name", name);
            return mav;
        }
    }
}

Thanks for all.

Answer 1

Content-Type is a request header and you can get with the following code:

    @RequestMapping("/display")
    public void display(@RequestHeader("Content-Type") String contentType)  {}

see spring's @RequestHeader docs

You don't need to do this manually. The thing that you need is Content negotiation. Which returns response type that will fit in your needs. See this post