程序包 cn.taketoday.web.annotation

Annotation Interface RequestParam

@Documented
@Retention(RUNTIME)
@Target({PARAMETER,ANNOTATION_TYPE})
public @interface RequestParam

Annotation which indicates that a method parameter should be bound to a web request parameter.

this Annotation provides NamedValueInfo

this Annotation is not like Framework's RequestParam

作者:

TODAY

另请参阅:

• NamedValueInfo

可选元素概要

可选元素

修饰符和类型	可选元素	说明
String	defaultValue	The default value to use as a fallback when the request parameter is not provided or has an empty value.
String	name	The name of the request parameter to bind to.
boolean	required	Whether the parameter is required.
String	value	Alias for name().

元素详细资料

value

@AliasFor("name")
String value

Alias for name().

默认值:

""

name

@AliasFor("value")
String name

The name of the request parameter to bind to.

从以下版本开始:

4.0

默认值:

""

required

boolean required

Whether the parameter is required.

Defaults to false, leading to an exception being thrown if the parameter is missing in the request. Switch this to false if you prefer a null value if the parameter is not present in the request.

Alternatively, provide a defaultValue(), which implicitly sets this flag to false. If required == true when request parameter is null, will be throws exception

默认值:

true

defaultValue

String defaultValue

The default value to use as a fallback when the request parameter is not provided or has an empty value.

Supplying a default value implicitly sets required() to false.

默认值:

"\n\t\t\n\t\t\n\ue000\ue001\ue002\n\t\t\t\t\n"