org.springframework.web.servlet.mvc.method.annotation

Class RequestPartMethodArgumentResolver

java.lang.Object

org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver

org.springframework.web.servlet.mvc.method.annotation.RequestPartMethodArgumentResolver

All Implemented Interfaces:

org.springframework.web.method.support.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 with @RequestPart or the name of the part is not specified, the request part's name is derived from the name of the method argument.

Automatic validation may be applied if the argument is annotated with any annotations that trigger validation. In case of validation failure, a MethodArgumentNotValidException is raised and a 400 response status code returned if the 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

logger, messageConverters

Constructor Summary

Constructors

Constructor and Description
RequestPartMethodArgumentResolver(List<org.springframework.http.converter.HttpMessageConverter<?>> messageConverters) Basic constructor with converters only.
RequestPartMethodArgumentResolver(List<org.springframework.http.converter.HttpMessageConverter<?>> messageConverters, List<Object> requestResponseBodyAdvice) Constructor with converters and RequestBodyAdvice and ResponseBodyAdvice.

Method Summary

Modifier and Type	Method and Description
Object	resolveArgument(org.springframework.core.MethodParameter parameter, org.springframework.web.method.support.ModelAndViewContainer mavContainer, org.springframework.web.context.request.NativeWebRequest request, org.springframework.web.bind.support.WebDataBinderFactory binderFactory)
boolean	supportsParameter(org.springframework.core.MethodParameter parameter) Whether the given method parameter is supported as multi-part.

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

adaptArgumentIfNecessary, createInputMessage, getSupportedMediaTypes, 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<org.springframework.http.converter.HttpMessageConverter<?>> messageConverters)

Basic constructor with converters only.

RequestPartMethodArgumentResolver

public RequestPartMethodArgumentResolver(List<org.springframework.http.converter.HttpMessageConverter<?>> messageConverters,
                                         List<Object> requestResponseBodyAdvice)

Constructor with converters and RequestBodyAdvice and ResponseBodyAdvice.

Method Detail

supportsParameter

public boolean supportsParameter(org.springframework.core.MethodParameter parameter)

Whether the given method parameter is supported as multi-part. Supports the following method parameters:

• annotated with @RequestPart
• of type MultipartFile unless annotated with @RequestParam
• of type javax.servlet.http.Part unless annotated with @RequestParam

resolveArgument

@Nullable
public Object resolveArgument(org.springframework.core.MethodParameter parameter,
                                        @Nullable
                                        org.springframework.web.method.support.ModelAndViewContainer mavContainer,
                                        org.springframework.web.context.request.NativeWebRequest request,
                                        @Nullable
                                        org.springframework.web.bind.support.WebDataBinderFactory binderFactory)
                                 throws Exception

Throws:

Exception