Polishing

spring-web/src/main/java/org/springframework/web/bind/annotation/RequestPart.java

@@ -33,23 +33,24 @@ import org.springframework.web.multipart.MultipartResolver;
  * Annotation that can be used to associate the part of a "multipart/form-data" request
  * with a method argument.
  *
- * <p>Supported method argument types include {@link MultipartFile}
- * in conjunction with Spring's {@link MultipartResolver} abstraction,
- * {@code javax.servlet.http.Part} in conjunction with Servlet 3.0 multipart requests,
- * or otherwise for any other method argument, the content of the part is passed through an
- * {@link HttpMessageConverter} taking into consideration the 'Content-Type' header
- * of the request part. This is analogous to what @{@link RequestBody} does to resolve
- * an argument based on the content of a non-multipart regular request.
+ * <p>Supported method argument types include {@link MultipartFile} in conjunction with
+ * Spring's {@link MultipartResolver} abstraction, {@code javax.servlet.http.Part} in
+ * conjunction with Servlet 3.0 multipart requests, or otherwise for any other method
+ * argument, the content of the part is passed through an {@link HttpMessageConverter}
+ * taking into consideration the 'Content-Type' header of the request part. This is
+ * analogous to what @{@link RequestBody} does to resolve an argument based on the
+ * content of a non-multipart regular request.
  *
- * <p>Note that @{@link RequestParam} annotation can also be used to associate the
- * part of a "multipart/form-data" request with a method argument supporting the same
- * method argument types. The main difference is that when the method argument is not a
- * String, @{@link RequestParam} relies on type conversion via a registered
- * {@link Converter} or {@link PropertyEditor} while @{@link RequestPart} relies
- * on {@link HttpMessageConverter HttpMessageConverters} taking into consideration the 'Content-Type' header
- * of the request part. @{@link RequestParam} is likely to be used with name-value form
- * fields while @{@link RequestPart} is likely to be used with parts containing more
- * complex content (e.g. JSON, XML).
+ * <p>Note that @{@link RequestParam} annotation can also be used to associate the part
+ * of a "multipart/form-data" request with a method argument supporting the same method
+ * argument types. The main difference is that when the method argument is not a String
+ * or raw {@code MultipartFile} / {@code Part}, {@code @RequestParam} relies on type
+ * conversion via a registered {@link Converter} or {@link PropertyEditor} while
+ * {@link RequestPart} relies on {@link HttpMessageConverter HttpMessageConverters}
+ * taking into consideration the 'Content-Type' header of the request part.
+ * {@link RequestParam} is likely to be used with name-value form fields while
+ * {@link RequestPart} is likely to be used with parts containing more complex content
+ * e.g. JSON, XML).
  *
  * @author Rossen Stoyanchev
  * @author Arjen Poutsma

spring-web/src/main/java/org/springframework/web/method/annotation/MapMethodProcessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -60,7 +60,7 @@ public class MapMethodProcessor implements HandlerMethodArgumentResolver, Handle
 	}
 
 	@Override
-	@SuppressWarnings({ "unchecked", "rawtypes" })
+	@SuppressWarnings({"unchecked", "rawtypes"})
 	public void handleReturnValue(@Nullable Object returnValue, MethodParameter returnType,
 			ModelAndViewContainer mavContainer, NativeWebRequest webRequest) throws Exception {
 

spring-web/src/main/java/org/springframework/web/method/annotation/RequestParamMethodArgumentResolver.java

@@ -41,7 +41,7 @@ import org.springframework.web.context.request.NativeWebRequest;
 import org.springframework.web.method.support.UriComponentsContributor;
 import org.springframework.web.multipart.MultipartException;
 import org.springframework.web.multipart.MultipartFile;
-import org.springframework.web.multipart.MultipartHttpServletRequest;
+import org.springframework.web.multipart.MultipartRequest;
 import org.springframework.web.multipart.MultipartResolver;
 import org.springframework.web.multipart.support.MissingServletRequestPartException;
 import org.springframework.web.multipart.support.MultipartResolutionDelegate;
@@ -114,15 +114,11 @@ public class RequestParamMethodArgumentResolver extends AbstractNamedValueMethod
 	 * Supports the following:
 	 * <ul>
 	 * <li>@RequestParam-annotated method arguments.
-	 * This excludes {@link Map} params where the annotation doesn't
-	 * specify a name.	See {@link RequestParamMapMethodArgumentResolver}
-	 * instead for such params.
-	 * <li>Arguments of type {@link MultipartFile}
-	 * unless annotated with @{@link RequestPart}.
-	 * <li>Arguments of type {@code javax.servlet.http.Part}
-	 * unless annotated with @{@link RequestPart}.
-	 * <li>In default resolution mode, simple type arguments
-	 * even if not with @{@link RequestParam}.
+	 * This excludes {@link Map} params where the annotation does not specify a name.
+	 * See {@link RequestParamMapMethodArgumentResolver} instead for such params.
+	 * <li>Arguments of type {@link MultipartFile} unless annotated with @{@link RequestPart}.
+	 * <li>Arguments of type {@code Part} unless annotated with @{@link RequestPart}.
+	 * <li>In default resolution mode, simple type arguments even if not with @{@link RequestParam}.
 	 * </ul>
 	 */
 	@Override
@@ -172,7 +168,7 @@ public class RequestParamMethodArgumentResolver extends AbstractNamedValueMethod
 		}
 
 		Object arg = null;
-		MultipartHttpServletRequest multipartRequest = request.getNativeRequest(MultipartHttpServletRequest.class);
+		MultipartRequest multipartRequest = request.getNativeRequest(MultipartRequest.class);
 		if (multipartRequest != null) {
 			List<MultipartFile> files = multipartRequest.getFiles(name);
 			if (!files.isEmpty()) {