web 一种返回数据用法
spring security #TokenEndpoint
private ResponseEntity<OAuth2AccessToken> getResponse(OAuth2AccessToken accessToken) {
HttpHeaders headers = new HttpHeaders();
headers.set("Cache-Control", "no-store");
headers.set("Pragma", "no-cache");
headers.set("Content-Type", "application/json;charset=UTF-8");
return new ResponseEntity<OAuth2AccessToken>(accessToken, headers, HttpStatus.OK);
}