WebFlux 中form data获取不到参数问题

官网并不提供form data

以下方式获取

@RequestMapping(path = "/post", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_VALUE)
public Mono<Map<String, Object>> post(ServerWebExchange exchange,
    @RequestBody(required = false) String body) throws IOException {
  HashMap<String, Object> ret = new HashMap<>();
  ret.put("headers", getHeaders(exchange));
  ret.put("data", body);
  HashMap<String, Object> form = new HashMap<>();
  ret.put("form", form);
  return exchange.getFormData().flatMap(map -> {
    for (Map.Entry<String, List<String>> entry: map.entrySet()) {
      for (String value : entry.getValue()) {
        form.put(entry.getKey(), value);
      }
    }
    return Mono.just(ret);
  });
}