Polishing

spring-web/src/main/java/org/springframework/http/converter/json/AbstractJackson2HttpMessageConverter.java

@@ -219,7 +219,7 @@ public abstract class AbstractJackson2HttpMessageConverter extends AbstractGener
 		return readJavaType(javaType, inputMessage);
 	}
 
-	private Object readJavaType(JavaType javaType, HttpInputMessage inputMessage) {
+	private Object readJavaType(JavaType javaType, HttpInputMessage inputMessage) throws IOException {
 		try {
 			if (inputMessage instanceof MappingJacksonInputMessage) {
 				Class<?> deserializationView = ((MappingJacksonInputMessage) inputMessage).getDeserializationView();
@@ -230,8 +230,8 @@ public abstract class AbstractJackson2HttpMessageConverter extends AbstractGener
 			}
 			return this.objectMapper.readValue(inputMessage.getBody(), javaType);
 		}
-		catch (IOException ex) {
+		catch (JsonProcessingException ex) {
-			throw new HttpMessageNotReadableException("Could not read JSON document: " + ex.getMessage(), ex);
+			throw new HttpMessageNotReadableException("JSON parse error: " + ex.getOriginalMessage(), ex);
 		}
 	}
 
@@ -283,7 +283,7 @@ public abstract class AbstractJackson2HttpMessageConverter extends AbstractGener
 
 		}
 		catch (JsonProcessingException ex) {
-			throw new HttpMessageNotWritableException("Could not write JSON document: " + ex.getMessage(), ex);
+			throw new HttpMessageNotWritableException("Could not write JSON: " + ex.getOriginalMessage(), ex);
 		}
 	}
 

spring-web/src/main/java/org/springframework/http/converter/json/GsonHttpMessageConverter.java

@@ -161,7 +161,7 @@ public class GsonHttpMessageConverter extends AbstractGenericHttpMessageConverte
 			return this.gson.fromJson(json, token.getType());
 		}
 		catch (JsonParseException ex) {
-			throw new HttpMessageNotReadableException("Could not read JSON document: " + ex.getMessage(), ex);
+			throw new HttpMessageNotReadableException("JSON parse error: " + ex.getMessage(), ex);
 		}
 	}
 
@@ -191,7 +191,7 @@ public class GsonHttpMessageConverter extends AbstractGenericHttpMessageConverte
 			writer.close();
 		}
 		catch (JsonIOException ex) {
-			throw new HttpMessageNotWritableException("Could not write JSON document: " + ex.getMessage(), ex);
+			throw new HttpMessageNotWritableException("Could not write JSON: " + ex.getMessage(), ex);
 		}
 	}
 

spring-web/src/main/java/org/springframework/web/client/HttpMessageConverterExtractor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -86,7 +86,8 @@ public class HttpMessageConverterExtractor<T> implements ResponseExtractor<T> {
 
 		for (HttpMessageConverter<?> messageConverter : this.messageConverters) {
 			if (messageConverter instanceof GenericHttpMessageConverter) {
-				GenericHttpMessageConverter<?> genericMessageConverter = (GenericHttpMessageConverter<?>) messageConverter;
+				GenericHttpMessageConverter<?> genericMessageConverter =
+						(GenericHttpMessageConverter<?>) messageConverter;
 				if (genericMessageConverter.canRead(this.responseType, null, contentType)) {
 					if (logger.isDebugEnabled()) {
 						logger.debug("Reading [" + this.responseType + "] as \"" +

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/annotation/ResponseStatusExceptionResolver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -45,7 +45,7 @@ import org.springframework.web.servlet.handler.AbstractHandlerExceptionResolver;
  * @author Rossen Stoyanchev
  * @author Sam Brannen
  * @since 3.0
- * @see AnnotatedElementUtils#findMergedAnnotation
+ * @see ResponseStatus
  */
 public class ResponseStatusExceptionResolver extends AbstractHandlerExceptionResolver implements MessageSourceAware {
 
@@ -99,14 +99,14 @@ public class ResponseStatusExceptionResolver extends AbstractHandlerExceptionRes
 
 		int statusCode = responseStatus.code().value();
 		String reason = responseStatus.reason();
-		if (this.messageSource != null) {
-			reason = this.messageSource.getMessage(reason, null, reason, LocaleContextHolder.getLocale());
-		}
 		if (!StringUtils.hasLength(reason)) {
 			response.sendError(statusCode);
 		}
 		else {
-			response.sendError(statusCode, reason);
+			String resolvedReason = (this.messageSource != null ?
+					this.messageSource.getMessage(reason, null, reason, LocaleContextHolder.getLocale()) :
+					reason);
+			response.sendError(statusCode, resolvedReason);
 		}
 		return new ModelAndView();
 	}

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/AbstractMessageConverterMethodArgumentResolver.java

@@ -226,7 +226,7 @@ public abstract class AbstractMessageConverterMethodArgumentResolver implements
 			}
 		}
 		catch (IOException ex) {
-			throw new HttpMessageNotReadableException("Could not read document: " + ex.getMessage(), ex);
+			throw new HttpMessageNotReadableException("I/O error while reading input message", ex);
 		}
 
 		if (body == NO_VALUE) {

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/AbstractMessageConverterMethodProcessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -156,8 +156,8 @@ public abstract class AbstractMessageConverterMethodProcessor extends AbstractMe
 	 * @param inputMessage the input messages. Used to inspect the {@code Accept} header.
 	 * @param outputMessage the output message to write to
 	 * @throws IOException thrown in case of I/O errors
-	 * @throws HttpMediaTypeNotAcceptableException thrown when the conditions indicated by {@code Accept} header on
+	 * @throws HttpMediaTypeNotAcceptableException thrown when the conditions indicated
-	 * the request cannot be met by the message converters
+	 * by the {@code Accept} header on the request cannot be met by the message converters
 	 */
 	@SuppressWarnings("unchecked")
 	protected <T> void writeWithMessageConverters(T value, MethodParameter returnType,