Spring Web 6.1.4 · org.springframework.web.bind.annotation.RequestParam

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

Supported for annotated handler methods in Spring MVC and Spring WebFlux as follows:

In Spring MVC, "request parameters" map to query parameters, form data, and parts in multipart requests. This is because the Servlet API combines query parameters and form data into a single map called "parameters", and that includes automatic parsing of the request body.
In Spring WebFlux, "request parameters" map to query parameters only. To work with all 3, query, form data, and multipart data, you can use data binding to a command object annotated with ModelAttribute.

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.

Method Summary

Modifier and Type	Method and Description
public String	defaultValue() The default value to use as a fallback when the request parameter is not provided or has an empty value.
public String	name() The name of the request parameter to bind to.
public boolean	required() Whether the parameter is required.
public String	value() Alias for `name`.

Inherited from java.lang.annotation.Annotation:: annotationType equals hashCode toString

Method Detail

defaultValue back to summary

defaultValue	back to summary
public 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`.

public 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.

name	back to summary
public String name() The name of the request parameter to bind to. Annotations @AliasFor:value Since 4.2

name

back to summary

public String name()

The name of the request parameter to bind to.

Annotations

@AliasFor:value

Since

4.2

required back to summary

required	back to summary
public boolean required() Whether the parameter is required. Defaults to `true`, 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`.

public boolean required()

Whether the parameter is required.

Defaults to true, 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.

value back to summary

value	back to summary
public String value() Alias for `name`. Annotations @AliasFor:name

public String value()

Alias for name.

Annotations

@AliasFor:name

public @Interface RequestParam

Method Summary

Method Detail