title: Spring RestController produces charset=UTF-8
body: <p>Since updating to the latest version of Spring-Boot (1.4.1) I've noticed that in my RestControllers even though I'm explicitly setting the media type produced to "application/json" it is now producing "application/json;charset=UTF-8"</p>
  
  <p>Controller:</p>
  
  <pre><code>@RestController
  @RequestMapping(value = "/api/1/accounts", consumes = "application/json", produces = "application/json")
  public class AccountController {
  .....
  </code></pre>
  
  <p>Response Header</p>
  
  <pre><code>Content-Type →application/json;charset=UTF-8
  </code></pre>
  
  <p>Is there now somewhere else where this is configured which is overriding the RequestMapping setting?</p>