java.lang.Object
- org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver
- - org.springframework.web.servlet.mvc.method.annotation.RequestPartMethodArgumentResolver

All Implemented Interfaces:
HandlerMethodArgumentResolver
```
public class RequestPartMethodArgumentResolver
extends AbstractMessageConverterMethodArgumentResolver
```
Resolves the following method arguments:
- Annotated with @RequestPart
- Of type MultipartFile in conjunction with Spring's MultipartResolver abstraction
- Of type javax.servlet.http.Part in conjunction with Servlet 3.0 multipart requests
When a parameter is annotated with @RequestPart, the content of the part is passed through an HttpMessageConverter to resolve the method argument with the 'Content-Type' of the request part in mind. This is analogous to what @RequestBody does to resolve an argument based on the content of a regular request.
When a parameter is not annotated or the name of the part is not specified, it is derived from the name of the method argument.
Automatic validation may be applied if the argument is annotated with @javax.validation.Valid. In case of validation failure, a MethodArgumentNotValidException is raised and a 400 response status code returned if DefaultHandlerExceptionResolver is configured.
Since:
3.1
Author:
Rossen Stoyanchev, Brian Clozel, Juergen Hoeller

Field Summary
- Fields inherited from class org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver
  allSupportedMediaTypes, logger, messageConverters

Constructor Summary

Constructors
Constructor	Description
`RequestPartMethodArgumentResolver(List<HttpMessageConverter<?>> messageConverters)`	Basic constructor with converters only.
`RequestPartMethodArgumentResolver(List<HttpMessageConverter<?>> messageConverters, List<Object> requestResponseBodyAdvice)`	Constructor with converters and `Request~` and `ResponseBodyAdvice`.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Object`	`resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest request, WebDataBinderFactory binderFactory)`	Resolves a method parameter into an argument value from a given request.
`boolean`	`supportsParameter(MethodParameter parameter)`	Whether the given method parameter is a multi-part supported.

Methods inherited from class org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver
adaptArgumentIfNecessary, createInputMessage, getAdvice, isBindExceptionRequired, readWithMessageConverters, readWithMessageConverters, validateIfApplicable

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - RequestPartMethodArgumentResolver
```
public RequestPartMethodArgumentResolver(List<HttpMessageConverter<?>> messageConverters)
```
    Basic constructor with converters only.
  - RequestPartMethodArgumentResolver
```
public RequestPartMethodArgumentResolver(List<HttpMessageConverter<?>> messageConverters,
                                         List<Object> requestResponseBodyAdvice)
```
    Constructor with converters and Request~ and ResponseBodyAdvice.
- Method Detail
  - supportsParameter
```
public boolean supportsParameter(MethodParameter parameter)
```
    Whether the given method parameter is a multi-part supported. Supports the following:
    annotated with @RequestPart
    of type MultipartFile unless annotated with @RequestParam
    of type javax.servlet.http.Part unless annotated with @RequestParam
    Parameters:
    parameter - the method parameter to check
    Returns:
    true if this resolver supports the supplied parameter; false otherwise
  - resolveArgument
```
public Object resolveArgument(MethodParameter parameter,
                              ModelAndViewContainer mavContainer,
                              NativeWebRequest request,
                              WebDataBinderFactory binderFactory)
                       throws Exception
```
    Description copied from interface: HandlerMethodArgumentResolver
    Resolves a method parameter into an argument value from a given request. A ModelAndViewContainer provides access to the model for the request. A WebDataBinderFactory provides a way to create a WebDataBinder instance when needed for data binding and type conversion purposes.
    Parameters:
    parameter - the method parameter to resolve. This parameter must have previously been passed to HandlerMethodArgumentResolver.supportsParameter(org.springframework.core.MethodParameter) which must have returned true.
    mavContainer - the ModelAndViewContainer for the current request
    request - the current request
    binderFactory - a factory for creating WebDataBinder instances
    Returns:
    the resolved argument value, or null
    Throws:
    Exception - in case of errors with the preparation of argument values

Class RequestPartMethodArgumentResolver

Field Summary

Fields inherited from class org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver

Constructor Summary

Method Summary

Methods inherited from class org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver

Methods inherited from class java.lang.Object

Constructor Detail

RequestPartMethodArgumentResolver

RequestPartMethodArgumentResolver

Method Detail

supportsParameter

resolveArgument