Q: How to set Access-Control-Allow-Origin when using @RestController? I am using @RestController to provide a REST service. But I need to set Access-Control-Allow-Origin in the response header. How would I do this?
My RestController:
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class restController  {

   @RequestMapping("/some")
   public Response some(@RequestParam(value="body")  String user) {
      return new Response(user);
   }
}

My Response:
public class Response {

  long id;
  String user;

  public Response(String user) {
       this.id = 7;
       this.user = user;
  }
}

@RestController works very well but how can I modify it or the response to set Access-Control-Allow-Origin?

A: Try this code:
  @CrossOrigin(origins = "*")
   @RequestMapping("/some")
   public Response some(@RequestParam(value="body")  String user) {
      return new Response(user);
   }

or this
@RequestMapping("/some")
public Response some(@RequestParam(value="body")  String user,HttpServletResponse 
response) {
   response.addHeader("Access-Control-Allow-Origin", "*");
   return new Response(user);
}

