How to set response header in spring mvc

Question

I have a method in which i want to set response header cache-control and pragma :-

public String addUser(@Valid User user, BindingResult bindingResult) {     if(bindingResult.hasErrors())     {         bindingResult.getFieldError();         return"edit";     }     return "redirect:/welcome/profile/"+user.getName(); } 

In this method i want to set cache-control and pragma like we do in simple servlet code using HttpservletResponse calling setHeader method :-

response.setHeader("Cache-Control","no-cache,no-store,must-revalidate");     response.setHeader("Pragma","no-cache");     response.setDateHeader("Expires", 0); 

I searched spring docs and could not find any direct way to do it, but I found this:-

@RequestMapping("/something") public ResponseEntity<String> handle(HttpEntity<byte[]> requestEntity) throws UnsupportedEncodingException  {     String requestHeader = requestEntity.getHeaders().getFirst("MyRequestHeader"));     byte[] requestBody = requestEntity.getBody();     HttpHeaders responseHeaders = new HttpHeaders();     responseHeaders.set("MyResponseHeader", "MyValue");     return new ResponseEntity<String>("Hello World", responseHeaders, HttpStatus.CREATED); } 

But I dont know how to use it

Answer 1

If you want to set headers for every response for a controller you can use @ModelAttribute annotation.

@ModelAttribute public void setVaryResponseHeader(HttpServletResponse response) {     response.setHeader("Vary", "Accept"); }     

Answer 2

  public String addUser(@Valid User user, BindingResult bindingResult,HttpServletRequest request,HttpServletResponse response)   {        if(bindingResult.hasErrors())        {             bindingResult.getFieldError();             return"edit";       }       response.setHeader("Cache-Control","no-cache,no-store,must-revalidate");       response.setHeader("Pragma","no-cache");       response.setDateHeader("Expires", 0);       return "redirect:/welcome/profile/"+user.getName();   }