注释类型 RequestHeader
@Target(PARAMETER) @Retention(RUNTIME) @Documented public @interface RequestHeader
Annotation which indicates that a method parameter should be bound to a web request header.Supported for annotated handler methods in Spring MVC and Spring WebFlux.
If the method parameter is
Map<String, String>
,MultiValueMap<String, String>
, orHttpHeaders
then the map is populated with all header names and values.- 从以下版本开始:
- 3.0
- 作者:
- Juergen Hoeller, Sam Brannen
- 另请参阅:
RequestMapping
,RequestParam
,CookieValue
required
boolean required
Whether the header is required.Defaults to
true
, leading to an exception being thrown if the header is missing in the request. Switch this tofalse
if you prefer anull
value if the header is not present in the request.Alternatively, provide a
defaultValue()
, which implicitly sets this flag tofalse
.- 默认值:
- true
defaultValue
String defaultValue
The default value to use as a fallback.Supplying a default value implicitly sets
required()
tofalse
.- 默认值:
- "\n\t\t\n\t\t\n\ue000\ue001\ue002\n\t\t\t\t\n"