Treat java.nio.charset.Charset as string type by default

[quaff]

public ResponseEntity<StreamingResponseBody> download(@RequestParam(required = false) Charset charset) {
}

it treat Charset as complex object

{
  "registered": true
}

Workaround:

SpringDocUtils.getConfig().replaceWithClass(Charset.class, String.class);

[quaff]

Perhaps for all clazz that matches DefaultConversionService.getSharedInstance().canConvert(String.class, clazz).