public class RequestParamMethodArgumentResolver extends AbstractNamedValueMethodArgumentResolver
RequestParam
, arguments of
type MultipartFile
in conjunction with Spring's MultipartResolver
abstraction, and arguments of type javax.servlet.http.Part
in conjunction
with Servlet 3.0 multipart requests. This resolver can also be created in default
resolution mode in which simple types (int, long, etc.) not annotated withRequestParamMapMethodArgumentResolver
AbstractNamedValueMethodArgumentResolver.NamedValueInfo
Constructor and Description |
---|
RequestParamMethodArgumentResolver(ConfigurableBeanFactory beanFactory,
boolean useDefaultResolution) |
Modifier and Type | Method and Description |
---|---|
protected AbstractNamedValueMethodArgumentResolver.NamedValueInfo |
createNamedValueInfo(MethodParameter parameter)
Create the
AbstractNamedValueMethodArgumentResolver.NamedValueInfo object for the given method parameter. |
protected void |
handleMissingValue(String paramName,
MethodParameter parameter)
Invoked when a named value is required, but
AbstractNamedValueMethodArgumentResolver.resolveName(String, MethodParameter, NativeWebRequest)
returned null and there is no default value. |
protected Object |
resolveName(String name,
MethodParameter parameter,
NativeWebRequest webRequest)
Resolves the given parameter type and value name into an argument value.
|
boolean |
supportsParameter(MethodParameter parameter)
Supports the following:
@RequestParam-annotated method arguments.
|
handleResolvedValue, resolveArgument
public RequestParamMethodArgumentResolver(ConfigurableBeanFactory beanFactory, boolean useDefaultResolution)
beanFactory
- a bean factory used for resolving ${...} placeholder
and #{...} SpEL expressions in default values, or null
if default
values are not expected to contain expressionsuseDefaultResolution
- in default resolution mode a method argument
that is a simple type, as defined in BeanUtils.isSimpleProperty(java.lang.Class<?>)
,
is treated as a request parameter even if it it isn't annotated, the
request parameter name is derived from the method parameter name.public boolean supportsParameter(MethodParameter parameter)
Map
params where the annotation doesn't
specify a name. See RequestParamMapMethodArgumentResolver
instead for such params.
MultipartFile
unless annotated with @RequestPart
.
javax.servlet.http.Part
unless annotated with @RequestPart
.
RequestParam
.
parameter
- the method parameter to checktrue
if this resolver supports the supplied parameter;
false
otherwiseprotected AbstractNamedValueMethodArgumentResolver.NamedValueInfo createNamedValueInfo(MethodParameter parameter)
AbstractNamedValueMethodArgumentResolver
AbstractNamedValueMethodArgumentResolver.NamedValueInfo
object for the given method parameter. Implementations typically
retrieve the method annotation by means of MethodParameter.getParameterAnnotation(Class)
.createNamedValueInfo
in class AbstractNamedValueMethodArgumentResolver
parameter
- the method parameterprotected Object resolveName(String name, MethodParameter parameter, NativeWebRequest webRequest) throws Exception
AbstractNamedValueMethodArgumentResolver
resolveName
in class AbstractNamedValueMethodArgumentResolver
name
- the name of the value being resolvedparameter
- the method parameter to resolve to an argument valuewebRequest
- the current requestnull
Exception
- in case of errorsprotected void handleMissingValue(String paramName, MethodParameter parameter) throws ServletException
AbstractNamedValueMethodArgumentResolver
AbstractNamedValueMethodArgumentResolver.resolveName(String, MethodParameter, NativeWebRequest)
returned null
and there is no default value. Subclasses typically throw an exception in this case.handleMissingValue
in class AbstractNamedValueMethodArgumentResolver
paramName
- the name for the valueparameter
- the method parameterServletException