@Target(value=PARAMETER) @Retention(value=RUNTIME) @Documented public @interface RequestParam
If the method parameter type is Map
and a request parameter name
is specified, then the request parameter value is converted to a Map
assuming an appropriate conversion strategy is available.
If the method parameter is Map<String, String>
or
MultiValueMap<String, String>
and a parameter name is not specified, then the map parameter is populated
with all request parameter names and values.
RequestMapping
,
RequestHeader
,
CookieValue
,
RequestMappingHandlerAdapter
,
AnnotationMethodHandlerAdapter
,
AnnotationMethodHandlerAdapter
Modifier and Type | Optional Element and Description |
---|---|
String |
defaultValue
The default value to use as a fallback when the request parameter value
is not provided or empty.
|
boolean |
required
Whether the parameter is required.
|
String |
value
The name of the request parameter to bind to.
|
public abstract String value
public abstract boolean required
Default is true
, leading to an exception thrown in case
of the parameter missing in the request. Switch this to false
if you prefer a null
in case of the parameter missing.
Alternatively, provide a defaultValue
,
which implicitly sets this flag to false
.
public abstract String defaultValue
required()
to false.