Spring控制器内部具有以下方法：
public Response myMethod (@PathVariable("id") String id,@RequestParam(required = false) Map<String,Object> queryString,@RequestHeader(value = HttpHeaders.accEPT,required = false) String acceptheader,@RequestHeader(value = HttpHeaders.CACHE_CONTROL,required = false,defaultvalue = 1) String expiration,@RequestHeader(value = HttpHeaders.FROM) String appId) {
// ...
}
在这里，我使用@RequestHeader提取整个Cache Control标头。是否有一种方法只能通过注入或通过专用Spring类进行进一步解析来获得max-age部分？还是我必须手动进行？
谢谢
您可能可以定义一个类，例如：CacheControlMaxAge，然后是Converter<HttpRequest,CacheControlMaxAge>，最后将参数声明为
CacheControlMaxAge
@Getter
@RequiredArgsConstructor
public class CacheControlMaxAge {
private final int maxAge;
}
@Component
public class CacheControlMaxAgeConverter implements Converter<HttpRequest,CacheControlMaxAge> {
public CacheControlMaxAge convert(HttpRequest request) {
// todo: extract stuff from request
return new CacheControlMaxAge(...);
}
}
public Response blah(...,CacheControlMaxAge cacheControl) { ... }