SPR-6464 Polish following code review.

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/FlashMap.java

@@ -17,10 +17,10 @@
 package org.springframework.web.servlet;
 
 import java.util.HashMap;
-import java.util.LinkedHashMap;
-import java.util.Map;
 
-import org.springframework.beans.BeanUtils;
+import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.util.MultiValueMap;
+import org.springframework.util.StringUtils;
 
 /**
  * A FlashMap provides a way for one request to store attributes intended for 
@@ -35,7 +35,7 @@ import org.springframework.beans.BeanUtils;
  * recipient. On a redirect, the target URL is known and for example
  * {@code org.springframework.web.servlet.view.RedirectView} has the
  * opportunity to automatically update the current FlashMap with target
- * URL information .
+ * URL information.
  * 
  * <p>Annotated controllers will usually not use this type directly.
  * See {@code org.springframework.web.servlet.mvc.support.RedirectAttributes}
@@ -46,13 +46,13 @@ import org.springframework.beans.BeanUtils;
  * 
  * @see FlashMapManager
  */
-public class FlashMap extends HashMap<String, Object> implements Comparable<FlashMap> {
+public final class FlashMap extends HashMap<String, Object> implements Comparable<FlashMap> {
 
 	private static final long serialVersionUID = 1L;
 	
 	private String targetRequestPath;
 	
-	private final Map<String, String> targetRequestParams = new LinkedHashMap<String, String>();
+	private final MultiValueMap<String, String> targetRequestParams = new LinkedMultiValueMap<String, String>();
 	
 	private long expirationStartTime;
 	
@@ -93,17 +93,15 @@ public class FlashMap extends HashMap<String, Object> implements Comparable<Flas
 	}
 
 	/**
-	 * Provide request parameter pairs to identify the request for this FlashMap. 
-	 * Only simple type, non-null parameter values are used.
+	 * Provide request parameters identifying the request for this FlashMap.
+	 * Null or empty keys and values are skipped.
 	 * @param params a Map with the names and values of expected parameters.
-	 * @see BeanUtils#isSimpleValueType(Class)
 	 */
-	public FlashMap addTargetRequestParams(Map<String, ?> params) {
+	public FlashMap addTargetRequestParams(MultiValueMap<String, String> params) {
 		if (params != null) {
-			for (String name : params.keySet()) {
-				Object value = params.get(name);
-				if ((value != null) && BeanUtils.isSimpleValueType(value.getClass())) {
-					this.targetRequestParams.put(name, value.toString());
+			for (String key : params.keySet()) {
+				for (String value : params.get(key)) {
+					addTargetRequestParam(key, value);
 				}
 			}
 		}
@@ -111,19 +109,21 @@ public class FlashMap extends HashMap<String, Object> implements Comparable<Flas
 	}
 
 	/**
-	 * Provide a request parameter to identify the request for this FlashMap.
-	 * @param name the name of the expected parameter, never {@code null}
-	 * @param value the value for the expected parameter, never {@code null}
+	 * Provide a request parameter identifying the request for this FlashMap.
+	 * @param name the expected parameter name, skipped if {@code null}
+	 * @param value the expected parameter value, skipped if {@code null}
 	 */
 	public FlashMap addTargetRequestParam(String name, String value) {
-		this.targetRequestParams.put(name, value.toString());
+		if (StringUtils.hasText(name) && StringUtils.hasText(value)) {
+			this.targetRequestParams.add(name, value);
+		}
 		return this;
 	}
 	
 	/**
-	 * Return the parameters identifying the target request, or an empty Map.
+	 * Return the parameters identifying the target request, or an empty map.
 	 */
-	public Map<String, String> getTargetRequestParams() {
+	public MultiValueMap<String, String> getTargetRequestParams() {
 		return targetRequestParams;
 	}
 
@@ -174,11 +174,11 @@ public class FlashMap extends HashMap<String, Object> implements Comparable<Flas
 
 	@Override
 	public String toString() {
-		StringBuilder result = new StringBuilder();
-		result.append("[Attributes=").append(super.toString());
-		result.append(", targetRequestPath=").append(this.targetRequestPath);
-		result.append(", targetRequestParams=" + this.targetRequestParams.toString()).append("]");
-		return result.toString();
+		StringBuilder sb = new StringBuilder();
+		sb.append("[Attributes=").append(super.toString());
+		sb.append(", targetRequestPath=").append(this.targetRequestPath);
+		sb.append(", targetRequestParams=").append(this.targetRequestParams).append("]");
+		return sb.toString();
 	}
 
 }

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/FlashMapManager.java

@@ -29,8 +29,7 @@ import javax.servlet.http.HttpServletRequest;
  * instances are exposed as request attributes and are accessible via methods
  * in {@code org.springframework.web.servlet.support.RequestContextUtils}.
  * 
- * <p>Annotated controllers are most likely to store and access flash attributes
- * through their model. 
+ * <p>Annotated controllers will usually not use this FlashMap directly.
  * See {@code org.springframework.web.servlet.mvc.support.RedirectAttributes}.
  * 
  * @author Rossen Stoyanchev

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/config/AnnotationDrivenBeanDefinitionParser.java

@@ -130,6 +130,7 @@ class AnnotationDrivenBeanDefinitionParser implements BeanDefinitionParser {
 		methodAdapterDef.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
 		methodAdapterDef.getPropertyValues().add("webBindingInitializer", bindingDef);
 		methodAdapterDef.getPropertyValues().add("messageConverters", messageConverters);
+		methodAdapterDef.getPropertyValues().add("ignoreDefaultModelOnRedirect", true);
 		if (argumentResolvers != null) {
 			methodAdapterDef.getPropertyValues().add("customArgumentResolvers", argumentResolvers);
 		}

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/config/annotation/WebMvcConfigurationSupport.java

@@ -73,42 +73,59 @@ import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandl
 import org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver;
 
 /**
- * A base class that provides default configuration for Spring MVC applications by registering Spring MVC 
- * infrastructure components to be detected by the {@link DispatcherServlet}. Typically applications should not
- * have to extend this class. A more likely place to start is to annotate an @{@link Configuration}
- * class with @{@link EnableWebMvc} (see @{@link EnableWebMvc} and {@link WebMvcConfigurer} for details).
+ * A base class that provides default configuration for Spring MVC applications 
+ * by registering Spring MVC infrastructure components to be detected by the 
+ * {@link DispatcherServlet}. An application configuration class is not required
+ * to extend this class. A more likely place to start is to annotate 
+ * an @{@link Configuration} class with @{@link EnableWebMvc} 
+ * (see @{@link EnableWebMvc} and {@link WebMvcConfigurer} for details).
  * 
- * <p>If using @{@link EnableWebMvc} does not give you all you need, consider extending directly from this 
- * class. Remember to add @{@link Configuration} to your subclass and @{@link Bean} to any superclass 
- * @{@link Bean} methods you choose to override.
+ * <p>If the customization options available with use of @{@link EnableWebMvc} 
+ * are not enough, consider extending directly from this class and override the
+ * appropriate methods. Remember to add @{@link Configuration} to your subclass 
+ * and @{@link Bean} to any superclass @{@link Bean} methods you override.
  * 
  * <p>This class registers the following {@link HandlerMapping}s:</p>
  * <ul>
- * 	<li>{@link RequestMappingHandlerMapping} ordered at 0 for mapping requests to annotated controller methods.
- * 	<li>{@link HandlerMapping} ordered at 1 to map URL paths directly to view names.
- * 	<li>{@link BeanNameUrlHandlerMapping} ordered at 2 to map URL paths to controller bean names.
- * 	<li>{@link HandlerMapping} ordered at {@code Integer.MAX_VALUE-1} to serve static resource requests.
- * 	<li>{@link HandlerMapping} ordered at {@code Integer.MAX_VALUE} to forward requests to the default servlet.
+ * 	<li>{@link RequestMappingHandlerMapping} 
+ * 	ordered at 0 for mapping requests to annotated controller methods.
+ * 	<li>{@link HandlerMapping} 
+ * 	ordered at 1 to map URL paths directly to view names.
+ * 	<li>{@link BeanNameUrlHandlerMapping} 
+ * 	ordered at 2 to map URL paths to controller bean names.
+ * 	<li>{@link HandlerMapping} 
+ * 	ordered at {@code Integer.MAX_VALUE-1} to serve static resource requests.
+ * 	<li>{@link HandlerMapping} 
+ * 	ordered at {@code Integer.MAX_VALUE} to forward requests to the default servlet.
  * </ul>
  *
  * <p>Registers these {@link HandlerAdapter}s:
  * <ul>
- * 	<li>{@link RequestMappingHandlerAdapter} for processing requests with annotated controller methods.
- * 	<li>{@link HttpRequestHandlerAdapter} for processing requests with {@link HttpRequestHandler}s.
- * 	<li>{@link SimpleControllerHandlerAdapter} for processing requests with interface-based {@link Controller}s.
+ * 	<li>{@link RequestMappingHandlerAdapter} 
+ * 	for processing requests with annotated controller methods.
+ * 	<li>{@link HttpRequestHandlerAdapter} 
+ * 	for processing requests with {@link HttpRequestHandler}s.
+ * 	<li>{@link SimpleControllerHandlerAdapter} 
+ * 	for processing requests with interface-based {@link Controller}s.
  * </ul>
  *
- * <p>Registers a {@link HandlerExceptionResolverComposite} with this chain of exception resolvers:
+ * <p>Registers a {@link HandlerExceptionResolverComposite} with this chain of
+ * exception resolvers:
  * <ul>
- * 	<li>{@link ExceptionHandlerExceptionResolver} for handling exceptions through @{@link ExceptionHandler} methods.
- * 	<li>{@link ResponseStatusExceptionResolver} for exceptions annotated with @{@link ResponseStatus}.
- * 	<li>{@link DefaultHandlerExceptionResolver} for resolving known Spring exception types
+ * 	<li>{@link ExceptionHandlerExceptionResolver} for handling exceptions 
+ * 	through @{@link ExceptionHandler} methods.
+ * 	<li>{@link ResponseStatusExceptionResolver} for exceptions annotated 
+ * 	with @{@link ResponseStatus}.
+ * 	<li>{@link DefaultHandlerExceptionResolver} for resolving known Spring 
+ * 	exception types
  * </ul>
  *
  * <p>Registers these other instances:
  * <ul>
- * 	<li>{@link FormattingConversionService} for use with annotated controller methods and the spring:eval JSP tag.
- * 	<li>{@link Validator} for validating model attributes on annotated controller methods.
+ * 	<li>{@link FormattingConversionService} 
+ * 	for use with annotated controller methods and the spring:eval JSP tag.
+ * 	<li>{@link Validator} 
+ * 	for validating model attributes on annotated controller methods.
  * </ul>
  *
  * @see EnableWebMvc
@@ -137,7 +154,8 @@ public abstract class WebMvcConfigurationSupport implements ApplicationContextAw
 	}
 	
 	/**
-	 * Returns a {@link RequestMappingHandlerMapping} ordered at 0 for mapping requests to annotated controllers.
+	 * Return a {@link RequestMappingHandlerMapping} ordered at 0 for mapping 
+	 * requests to annotated controllers.
 	 */
 	@Bean
 	public RequestMappingHandlerMapping requestMappingHandlerMapping() {
@@ -148,8 +166,9 @@ public abstract class WebMvcConfigurationSupport implements ApplicationContextAw
 	}
 	
 	/**
-	 * Provides access to the shared handler interceptors used to configure {@link HandlerMapping} instances with.
-	 * This method cannot be overridden, use {@link #addInterceptors(InterceptorRegistry)} instead. 
+	 * Provide access to the shared handler interceptors used to configure 
+	 * {@link HandlerMapping} instances with. This method cannot be overridden, 
+	 * use {@link #addInterceptors(InterceptorRegistry)} instead. 
 	 */
 	protected final Object[] getInterceptors() {
 		if (interceptors == null) {
@@ -162,15 +181,17 @@ public abstract class WebMvcConfigurationSupport implements ApplicationContextAw
 	}
 	
 	/**
-	 * Override this method to add Spring MVC interceptors for pre/post-processing of controller invocation.
+	 * Override this method to add Spring MVC interceptors for 
+	 * pre- and post-processing of controller invocation.
 	 * @see InterceptorRegistry
 	 */
 	protected void addInterceptors(InterceptorRegistry registry) {
 	}
 
 	/**
-	 * Returns a handler mapping ordered at 1 to map URL paths directly to view names.
-	 * To configure view controllers, override {@link #addViewControllers(ViewControllerRegistry)}. 
+	 * Return a handler mapping ordered at 1 to map URL paths directly to 
+	 * view names. To configure view controllers, override 
+	 * {@link #addViewControllers}. 
 	 */
 	@Bean
 	public HandlerMapping viewControllerHandlerMapping() {
@@ -191,7 +212,8 @@ public abstract class WebMvcConfigurationSupport implements ApplicationContextAw
 	}
 	
 	/**
-	 * Returns a {@link BeanNameUrlHandlerMapping} ordered at 2 to map URL paths to controller bean names.
+	 * Return a {@link BeanNameUrlHandlerMapping} ordered at 2 to map URL 
+	 * paths to controller bean names.
 	 */
 	@Bean
 	public BeanNameUrlHandlerMapping beanNameHandlerMapping() {
@@ -202,8 +224,9 @@ public abstract class WebMvcConfigurationSupport implements ApplicationContextAw
 	}
 
 	/**
-	 * Returns a handler mapping ordered at Integer.MAX_VALUE-1 with mapped resource handlers.
-	 * To configure resource handling, override {@link #addResourceHandlers(ResourceHandlerRegistry)}.
+	 * Return a handler mapping ordered at Integer.MAX_VALUE-1 with mapped 
+	 * resource handlers. To configure resource handling, override 
+	 * {@link #addResourceHandlers}.
 	 */
 	@Bean
 	public HandlerMapping resourceHandlerMapping() {
@@ -222,9 +245,9 @@ public abstract class WebMvcConfigurationSupport implements ApplicationContextAw
 	}
 
 	/**
-	 * Returns a handler mapping ordered at Integer.MAX_VALUE with a mapped default servlet handler.
-	 * To configure "default" Servlet handling, override 
-	 * {@link #configureDefaultServletHandling(DefaultServletHandlerConfigurer)}.  
+	 * Return a handler mapping ordered at Integer.MAX_VALUE with a mapped 
+	 * default servlet handler. To configure "default" Servlet handling, 
+	 * override {@link #configureDefaultServletHandling}.  
 	 */
 	@Bean
 	public HandlerMapping defaultServletHandlerMapping() {
@@ -243,12 +266,13 @@ public abstract class WebMvcConfigurationSupport implements ApplicationContextAw
 	}
 
 	/**
-	 * Returns a {@link RequestMappingHandlerAdapter} for processing requests through annotated controller methods.
-	 * Consider overriding one of these other more fine-grained methods:
+	 * Returns a {@link RequestMappingHandlerAdapter} for processing requests 
+	 * through annotated controller methods. Consider overriding one of these 
+	 * other more fine-grained methods:
 	 * <ul>
-	 *  <li>{@link #addArgumentResolvers(List)} for adding custom argument resolvers.
-	 * 	<li>{@link #addReturnValueHandlers(List)} for adding custom return value handlers.
-	 * 	<li>{@link #configureMessageConverters(List)} for adding custom message converters.
+	 *  <li>{@link #addArgumentResolvers} for adding custom argument resolvers.
+	 * 	<li>{@link #addReturnValueHandlers} for adding custom return value handlers.
+	 * 	<li>{@link #configureMessageConverters} for adding custom message converters.
 	 * </ul>
 	 */
 	@Bean
@@ -268,34 +292,46 @@ public abstract class WebMvcConfigurationSupport implements ApplicationContextAw
 		adapter.setWebBindingInitializer(webBindingInitializer);
 		adapter.setCustomArgumentResolvers(argumentResolvers);
 		adapter.setCustomReturnValueHandlers(returnValueHandlers);
+		adapter.setIgnoreDefaultModelOnRedirect(true);
 		return adapter;
 	}
 
 	/**
-	 * Add custom {@link HandlerMethodArgumentResolver}s to use in addition to the ones registered by default.
-	 * <p>Custom argument resolvers are invoked before built-in resolvers except for those that rely on the presence 
-	 * of annotations (e.g. {@code @RequestParameter}, {@code @PathVariable}, etc.). The latter can be customized 
-	 * by configuring the {@link RequestMappingHandlerAdapter} directly. 
-	 * @param argumentResolvers the list of custom converters; initially an empty list.
+	 * Add custom {@link HandlerMethodArgumentResolver}s to use in addition to 
+	 * the ones registered by default.
+	 * <p>Custom argument resolvers are invoked before built-in resolvers 
+	 * except for those that rely on the presence of annotations (e.g. 
+	 * {@code @RequestParameter}, {@code @PathVariable}, etc.). 
+	 * The latter can  be customized by configuring the 
+	 * {@link RequestMappingHandlerAdapter} directly. 
+	 * @param argumentResolvers the list of custom converters; 
+	 * 	initially an empty list.
 	 */
 	protected void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
 	}
 
 	/**
-	 * Add custom {@link HandlerMethodReturnValueHandler}s in addition to the ones registered by default.
-	 * <p>Custom return value handlers are invoked before built-in ones except for those that rely on the presence 
-	 * of annotations (e.g. {@code @ResponseBody}, {@code @ModelAttribute}, etc.). The latter can be customized
-	 * by configuring the {@link RequestMappingHandlerAdapter} directly.
-	 * @param returnValueHandlers the list of custom handlers; initially an empty list.
+	 * Add custom {@link HandlerMethodReturnValueHandler}s in addition to the 
+	 * ones registered by default.
+	 * <p>Custom return value handlers are invoked before built-in ones except 
+	 * for those that rely on the presence of annotations (e.g. 
+	 * {@code @ResponseBody}, {@code @ModelAttribute}, etc.). 
+	 * The latter can be customized by configuring the 
+	 * {@link RequestMappingHandlerAdapter} directly.
+	 * @param returnValueHandlers the list of custom handlers; 
+	 * initially an empty list.
 	 */
 	protected void addReturnValueHandlers(List<HandlerMethodReturnValueHandler> returnValueHandlers) {
 	}
 
 	/**
 	 * Provides access to the shared {@link HttpMessageConverter}s used by the 
-	 * {@link RequestMappingHandlerAdapter} and the {@link ExceptionHandlerExceptionResolver}. 
-	 * This method cannot be overridden. Use {@link #configureMessageConverters(List)} instead.
-	 * Also see {@link #addDefaultHttpMessageConverters(List)} that can be used to add default message converters.
+	 * {@link RequestMappingHandlerAdapter} and the 
+	 * {@link ExceptionHandlerExceptionResolver}. 
+	 * This method cannot be overridden. 
+	 * Use {@link #configureMessageConverters(List)} instead.
+	 * Also see {@link #addDefaultHttpMessageConverters(List)} that can be 
+	 * used to add default message converters.
 	 */
 	protected final List<HttpMessageConverter<?>> getMessageConverters() {
 		if (messageConverters == null) {
@@ -309,17 +345,20 @@ public abstract class WebMvcConfigurationSupport implements ApplicationContextAw
 	}
 
 	/**
-	 * Override this method to add custom {@link HttpMessageConverter}s to use with 
-	 * the {@link RequestMappingHandlerAdapter} and the {@link ExceptionHandlerExceptionResolver}.
-	 * Adding converters to the list turns off the default converters that would otherwise be registered by default.
-	 * Also see {@link #addDefaultHttpMessageConverters(List)} that can be used to add default message converters.
-	 * @param converters a list to add message converters to; initially an empty list.
+	 * Override this method to add custom {@link HttpMessageConverter}s to use 
+	 * with the {@link RequestMappingHandlerAdapter} and the 
+	 * {@link ExceptionHandlerExceptionResolver}. Adding converters to the 
+	 * list turns off the default converters that would otherwise be registered
+	 * by default. Also see {@link #addDefaultHttpMessageConverters(List)} that 
+	 * can be used to add default message converters.
+	 * @param converters a list to add message converters to; 
+	 * initially an empty list.
 	 */
 	protected void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
 	}
 
 	/**
-	 * A method available to subclasses to add default {@link HttpMessageConverter}s. 
+	 * Override this method to add default {@link HttpMessageConverter}s. 
 	 * @param messageConverters the list to add the default message converters to
 	 */
 	protected final void addDefaultHttpMessageConverters(List<HttpMessageConverter<?>> messageConverters) {
@@ -346,9 +385,9 @@ public abstract class WebMvcConfigurationSupport implements ApplicationContextAw
 	}
 	
 	/**
-	 * Returns a {@link FormattingConversionService} for use with annotated controller methods and the 
-	 * {@code spring:eval} JSP tag. Also see {@link #addFormatters(FormatterRegistry)} as an alternative
-	 * to overriding this method.
+	 * Returns a {@link FormattingConversionService} for use with annotated 
+	 * controller methods and the {@code spring:eval} JSP tag. 
+	 * Also see {@link #addFormatters} as an alternative to overriding this method.
 	 */
 	@Bean
 	public FormattingConversionService mvcConversionService() {
@@ -364,8 +403,9 @@ public abstract class WebMvcConfigurationSupport implements ApplicationContextAw
 	}
 
 	/**
-	 * Returns {@link Validator} for validating {@code @ModelAttribute} and {@code @RequestBody} arguments of 
-	 * annotated controller methods. To configure a custom validation, override {@link #getValidator()}.
+	 * Returns {@link Validator} for validating {@code @ModelAttribute} 
+	 * and {@code @RequestBody} arguments of annotated controller methods. 
+	 * To configure a custom validation, override {@link #getValidator()}.
 	 */
 	@Bean
 	Validator mvcValidator() {
@@ -404,7 +444,8 @@ public abstract class WebMvcConfigurationSupport implements ApplicationContextAw
 	}
 
 	/**
-	 * Returns a {@link HttpRequestHandlerAdapter} for processing requests with {@link HttpRequestHandler}s.
+	 * Returns a {@link HttpRequestHandlerAdapter} for processing requests 
+	 * with {@link HttpRequestHandler}s.
 	 */
 	@Bean
 	public HttpRequestHandlerAdapter httpRequestHandlerAdapter() {
@@ -412,7 +453,8 @@ public abstract class WebMvcConfigurationSupport implements ApplicationContextAw
 	}
 
 	/**
-	 * Returns a {@link SimpleControllerHandlerAdapter} for processing requests with interface-based controllers.
+	 * Returns a {@link SimpleControllerHandlerAdapter} for processing requests 
+	 * with interface-based controllers.
 	 */
 	@Bean
 	public SimpleControllerHandlerAdapter simpleControllerHandlerAdapter() {
@@ -420,8 +462,9 @@ public abstract class WebMvcConfigurationSupport implements ApplicationContextAw
 	}
 
 	/**
-	 * Returns a {@link HandlerExceptionResolverComposite} that contains a list of exception resolvers.
-	 * To customize the list of exception resolvers, override {@link #configureHandlerExceptionResolvers(List)}.
+	 * Returns a {@link HandlerExceptionResolverComposite} that contains a list
+	 * of exception resolvers. To customize the list of exception resolvers, 
+	 * override {@link #configureHandlerExceptionResolvers(List)}.
 	 */
 	@Bean
 	HandlerExceptionResolver handlerExceptionResolver() throws Exception {
@@ -439,21 +482,28 @@ public abstract class WebMvcConfigurationSupport implements ApplicationContextAw
 	}
 
 	/**
-	 * Override this method to configure the list of {@link HandlerExceptionResolver}s to use.
-	 * Adding resolvers to the list turns off the default resolvers that would otherwise be registered by default.
-	 * Also see {@link #addDefaultHandlerExceptionResolvers(List)} that can be used to add the default exception resolvers.
-	 * @param exceptionResolvers a list to add exception resolvers to; initially an empty list.
+	 * Override this method to configure the list of 
+	 * {@link HandlerExceptionResolver}s to use. Adding resolvers to the list 
+	 * turns off the default resolvers that would otherwise be registered by 
+	 * default. Also see {@link #addDefaultHandlerExceptionResolvers(List)} 
+	 * that can be used to add the default exception resolvers.
+	 * @param exceptionResolvers a list to add exception resolvers to; 
+	 * initially an empty list.
 	 */
 	protected void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {
 	}
 
 	/**
-	 * A method available to subclasses for adding default {@link HandlerExceptionResolver}s.
+	 * A method available to subclasses for adding default 
+	 * {@link HandlerExceptionResolver}s.
 	 * <p>Adds the following exception resolvers:
 	 * <ul>
-	 * 	<li>{@link ExceptionHandlerExceptionResolver} for handling exceptions through @{@link ExceptionHandler} methods.
-	 * 	<li>{@link ResponseStatusExceptionResolver} for exceptions annotated with @{@link ResponseStatus}.
-	 * 	<li>{@link DefaultHandlerExceptionResolver} for resolving known Spring exception types
+	 * 	<li>{@link ExceptionHandlerExceptionResolver} 
+	 * 	for handling exceptions through @{@link ExceptionHandler} methods.
+	 * 	<li>{@link ResponseStatusExceptionResolver} 
+	 * 	for exceptions annotated with @{@link ResponseStatus}.
+	 * 	<li>{@link DefaultHandlerExceptionResolver} 
+	 * 	for resolving known Spring exception types
 	 * </ul>
 	 */
 	protected final void addDefaultHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/mvc/method/annotation/ExceptionHandlerExceptionResolver.java

@@ -235,7 +235,7 @@ public class ExceptionHandlerExceptionResolver extends AbstractHandlerMethodExce
 			return null;
 		}
 		
-		if (!mavContainer.isResolveView()) {
+		if (mavContainer.isRequestHandled()) {
 			return new ModelAndView();
 		}
 		else {

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/mvc/method/annotation/RequestMappingHandlerAdapter.java

@@ -93,7 +93,6 @@ import org.springframework.web.servlet.mvc.method.annotation.support.ServletRequ
 import org.springframework.web.servlet.mvc.method.annotation.support.ServletResponseMethodArgumentResolver;
 import org.springframework.web.servlet.mvc.method.annotation.support.ViewMethodReturnValueHandler;
 import org.springframework.web.servlet.mvc.support.RedirectAttributes;
-import org.springframework.web.servlet.mvc.support.RedirectAttributesModelMap;
 import org.springframework.web.servlet.support.RequestContextUtils;
 import org.springframework.web.util.WebUtils;
 
@@ -147,7 +146,7 @@ public class RequestMappingHandlerAdapter extends AbstractHandlerMethodAdapter i
 
 	private SessionAttributeStore sessionAttributeStore = new DefaultSessionAttributeStore();
 	
-	private boolean alwaysUseRedirectAttributes;
+	private boolean ignoreDefaultModelOnRedirect = false;
 	
 	private final Map<Class<?>, SessionAttributesHandler> sessionAttributesHandlerCache =
 		new ConcurrentHashMap<Class<?>, SessionAttributesHandler>();
@@ -334,19 +333,20 @@ public class RequestMappingHandlerAdapter extends AbstractHandlerMethodAdapter i
 	}
 	
 	/**
-	 * By default a controller uses {@link Model} to select attributes for 
-	 * rendering and for redirecting. However, a controller can also use 
-	 * {@link RedirectAttributes} to select attributes before a redirect.
-	 * <p>When this flag is set to {@code true}, {@link RedirectAttributes} 
-	 * becomes the only way to select attributes for a redirect. 
-	 * In other words, for a redirect a controller must use 
-	 * {@link RedirectAttributes} or no attributes will be used.
-	 * <p>The default value is {@code false}, meaning the {@link Model} is
-	 * used unless {@link RedirectAttributes} is used.
+	 * A controller can use the "default" {@link Model} in rendering and
+	 * redirect scenarios. Alternatively, it can use {@link RedirectAttributes}
+	 * to provide attributes for a redirect scenario.
+	 * <p>When this flag is set to {@code true}, the "default" model is never 
+	 * used in a redirect even if the controller method doesn't explicitly 
+	 * declare a RedirectAttributes argument.
+	 * <p>When set to {@code false}, the "default" model may be used in a 
+	 * redirect if the controller method doesn't explicitly declare a 
+	 * RedirectAttributes argument.
+	 * <p>The default setting is {@code false}.
 	 * @see RedirectAttributes
 	 */
-	public void setAlwaysUseRedirectAttributes(boolean alwaysUseRedirectAttributes) {
-		this.alwaysUseRedirectAttributes = alwaysUseRedirectAttributes;
+	public void setIgnoreDefaultModelOnRedirect(boolean ignoreDefaultModelOnRedirect) {
+		this.ignoreDefaultModelOnRedirect = ignoreDefaultModelOnRedirect;
 	}
 
 	public void setBeanFactory(BeanFactory beanFactory) {
@@ -538,18 +538,14 @@ public class RequestMappingHandlerAdapter extends AbstractHandlerMethodAdapter i
 		ModelAndViewContainer mavContainer = new ModelAndViewContainer();
 		mavContainer.addAllAttributes(RequestContextUtils.getInputFlashMap(request));
 		modelFactory.initModel(webRequest, mavContainer, requestMappingMethod);
+		mavContainer.setIgnoreDefaultModelOnRedirect(this.ignoreDefaultModelOnRedirect);
 
-		if (this.alwaysUseRedirectAttributes) {
-			DataBinder dataBinder = binderFactory.createBinder(webRequest, null, null);
-			mavContainer.setRedirectModel(new RedirectAttributesModelMap(dataBinder));
-		}
-		
 		SessionStatus sessionStatus = new SimpleSessionStatus();
 		
 		requestMappingMethod.invokeAndHandle(webRequest, mavContainer, sessionStatus);
 		modelFactory.updateModel(webRequest, mavContainer, sessionStatus);
 
-		if (!mavContainer.isResolveView()) {
+		if (mavContainer.isRequestHandled()) {
 			return null;
 		}
 		else {

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/mvc/method/annotation/ServletInvocableHandlerMethod.java

@@ -75,7 +75,7 @@ public class ServletInvocableHandlerMethod extends InvocableHandlerMethod {
 	 * <p>Return value handling may be skipped entirely when the method returns {@code null} (also possibly due
 	 * to a {@code void} return type) and one of the following additional conditions is true:
 	 * <ul>
-	 * <li>A {@link HandlerMethodArgumentResolver} has set the {@link ModelAndViewContainer#setResolveView(boolean)}
+	 * <li>A {@link HandlerMethodArgumentResolver} has set the {@link ModelAndViewContainer#setRequestHandled(boolean)}
 	 * flag to {@code false} -- e.g. method arguments providing access to the response.
 	 * <li>The request qualifies as "not modified" as defined in {@link ServletWebRequest#checkNotModified(long)}
 	 * and {@link ServletWebRequest#checkNotModified(String)}. In this case a response with "not modified" response
@@ -98,13 +98,13 @@ public class ServletInvocableHandlerMethod extends InvocableHandlerMethod {
 		setResponseStatus((ServletWebRequest) request);
 
 		if (returnValue == null) {
-			if (isRequestNotModified(request) || hasResponseStatus() || !mavContainer.isResolveView()) {
-				mavContainer.setResolveView(false);
+			if (isRequestNotModified(request) || hasResponseStatus() || mavContainer.isRequestHandled()) {
+				mavContainer.setRequestHandled(true);
 				return;
 			}
 		}
 
-		mavContainer.setResolveView(true);
+		mavContainer.setRequestHandled(false);
 
 		try {
 			returnValueHandlers.handleReturnValue(returnValue, getReturnType(), mavContainer, request);

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/mvc/method/annotation/support/HttpEntityMethodProcessor.java

@@ -101,7 +101,7 @@ public class HttpEntityMethodProcessor extends AbstractMessageConverterMethodPro
 								  ModelAndViewContainer mavContainer, 
 								  NativeWebRequest webRequest) throws Exception {
 		
-		mavContainer.setResolveView(false);
+		mavContainer.setRequestHandled(true);
 
 		if (returnValue == null) {
 			return;

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/mvc/method/annotation/support/ModelAndViewMethodReturnValueHandler.java

@@ -24,7 +24,7 @@ import org.springframework.web.servlet.ModelAndView;
 
 /**
  * Handles return values of type {@link ModelAndView} transferring their content to the {@link ModelAndViewContainer}. 
- * If the return value is {@code null}, the {@link ModelAndViewContainer#setResolveView(boolean)} flag is set to 
+ * If the return value is {@code null}, the {@link ModelAndViewContainer#setRequestHandled(boolean)} flag is set to 
  * {@code false} to indicate view resolution is not needed.
  *
  * @author Rossen Stoyanchev
@@ -49,7 +49,7 @@ public class ModelAndViewMethodReturnValueHandler implements HandlerMethodReturn
 			mavContainer.addAllAttributes(mav.getModel());
 		}
 		else {
-			mavContainer.setResolveView(false);
+			mavContainer.setRequestHandled(true);
 		}
 	}
 

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/mvc/method/annotation/support/RedirectAttributesMethodArgumentResolver.java

@@ -49,16 +49,10 @@ public class RedirectAttributesMethodArgumentResolver implements HandlerMethodAr
 								  ModelAndViewContainer mavContainer,
 								  NativeWebRequest webRequest, 
 								  WebDataBinderFactory binderFactory) throws Exception {
-		
-		if (mavContainer.getRedirectModel() != null) {
-			return mavContainer.getRedirectModel();
-		}
-		else {
-			DataBinder dataBinder = binderFactory.createBinder(webRequest, null, null);
-			ModelMap redirectAttributes  = new RedirectAttributesModelMap(dataBinder);
-			mavContainer.setRedirectModel(redirectAttributes);
-			return redirectAttributes;
-		}
+		DataBinder dataBinder = binderFactory.createBinder(webRequest, null, null);
+		ModelMap redirectAttributes  = new RedirectAttributesModelMap(dataBinder);
+		mavContainer.setRedirectModel(redirectAttributes);
+		return redirectAttributes;
 	}
 
 }

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/mvc/method/annotation/support/RequestResponseBodyMethodProcessor.java

@@ -98,7 +98,7 @@ public class RequestResponseBodyMethodProcessor extends AbstractMessageConverter
 								  MethodParameter returnType,
 								  ModelAndViewContainer mavContainer,
 								  NativeWebRequest webRequest) throws IOException, HttpMediaTypeNotAcceptableException {
-		mavContainer.setResolveView(false);
+		mavContainer.setRequestHandled(true);
 		if (returnValue != null) {
 			writeWithMessageConverters(returnValue, returnType, webRequest);
 		}

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/mvc/method/annotation/support/ServletResponseMethodArgumentResolver.java

@@ -54,7 +54,7 @@ public class ServletResponseMethodArgumentResolver implements HandlerMethodArgum
 
 	/**
 	 * {@inheritDoc}
-	 * <p>Sets the {@link ModelAndViewContainer#setResolveView(boolean)} flag to {@code false} to indicate
+	 * <p>Sets the {@link ModelAndViewContainer#setRequestHandled(boolean)} flag to {@code false} to indicate
 	 * that the method signature provides access to the response. If subsequently the underlying method  
 	 * returns {@code null}, view resolution will be bypassed.
 	 * @see ServletInvocableHandlerMethod#invokeAndHandle(NativeWebRequest, ModelAndViewContainer, Object...)
@@ -64,7 +64,7 @@ public class ServletResponseMethodArgumentResolver implements HandlerMethodArgum
 								  NativeWebRequest webRequest, 
 								  WebDataBinderFactory binderFactory) throws IOException {
 		
-		mavContainer.setResolveView(false);
+		mavContainer.setRequestHandled(true);
 
 		HttpServletResponse response = webRequest.getNativeResponse(HttpServletResponse.class);
 		Class<?> paramType = parameter.getParameterType();

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/mvc/method/annotation/support/ViewMethodReturnValueHandler.java

@@ -61,14 +61,14 @@ public class ViewMethodReturnValueHandler implements HandlerMethodReturnValueHan
 			String viewName = (String) returnValue;
 			mavContainer.setViewName(viewName);
 			if (isRedirectViewName(viewName)) {
-				mavContainer.setUseRedirectModel();
+				mavContainer.setUseRedirectModel(true);
 			}
 		}
 		else if (returnValue instanceof View){
 			View view = (View) returnValue;
 			mavContainer.setView(view);
 			if (isRedirectView(view)) {	
-				mavContainer.setUseRedirectModel();
+				mavContainer.setUseRedirectModel(true);
 			}
 		}
 		else {
@@ -95,7 +95,7 @@ public class ViewMethodReturnValueHandler implements HandlerMethodReturnValueHan
 	 * "false" otherwise.
 	 */
 	protected boolean isRedirectView(View view) {
-		if (SmartView.class.isAssignableFrom(view.getClass())) {
+		if (view instanceof SmartView) {
 			return ((SmartView) view).isRedirectView();
 		}
 		else {

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/support/DefaultFlashMapManager.java

@@ -27,13 +27,14 @@ import javax.servlet.http.HttpSession;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.springframework.util.CollectionUtils;
+import org.springframework.util.MultiValueMap;
 import org.springframework.util.StringUtils;
 import org.springframework.web.servlet.FlashMap;
 import org.springframework.web.servlet.FlashMapManager;
 import org.springframework.web.util.UrlPathHelper;
 
 /**
- * A default {@link FlashMapManager} implementation keeps {@link FlashMap}
+ * A default {@link FlashMapManager} implementation that stores {@link FlashMap}
  * instances in the HTTP session.
  * 
  * @author Rossen Stoyanchev
@@ -122,9 +123,10 @@ public class DefaultFlashMapManager implements FlashMapManager {
 				return false;
 			}
 		}
-		if (flashMap.getTargetRequestParams() != null) {
-			for (String paramName : flashMap.getTargetRequestParams().keySet()) {
-				if (!flashMap.getTargetRequestParams().get(paramName).equals(request.getParameter(paramName))) {
+		MultiValueMap<String, String> params = flashMap.getTargetRequestParams();
+		for (String key : params.keySet()) {
+			for (String value : params.get(key)) {
+				if (!value.equals(request.getParameter(key))) {
 					return false;
 				}
 			}

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/view/RedirectView.java

@@ -43,6 +43,8 @@ import org.springframework.web.servlet.HandlerMapping;
 import org.springframework.web.servlet.SmartView;
 import org.springframework.web.servlet.View;
 import org.springframework.web.servlet.support.RequestContextUtils;
+import org.springframework.web.util.UriComponents;
+import org.springframework.web.util.UriComponentsBuilder;
 import org.springframework.web.util.UriUtils;
 import org.springframework.web.util.WebUtils;
 
@@ -240,11 +242,9 @@ public class RedirectView extends AbstractUrlBasedView implements SmartView {
 
 		FlashMap flashMap = RequestContextUtils.getOutputFlashMap(request);
 		if (!CollectionUtils.isEmpty(flashMap)) {
-			String targetPath = WebUtils.extractUrlPath(targetUrl.toString());
-			flashMap.setTargetRequestPath(targetPath);
-			if (this.exposeModelAttributes) {
-				flashMap.addTargetRequestParams(model);
-			}				
+			UriComponents uriComponents = UriComponentsBuilder.fromUriString(targetUrl).build();
+			flashMap.setTargetRequestPath(uriComponents.getPath());
+			flashMap.addTargetRequestParams(uriComponents.getQueryParams());
 		}
 		
 		sendRedirect(request, response, targetUrl.toString(), this.http10Compatible);

org.springframework.web.servlet/src/test/java/org/springframework/web/servlet/FlashMapTests.java

@@ -21,6 +21,8 @@ import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
 import org.junit.Test;
+import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.util.MultiValueMap;
 
 /**
  * Test fixture for {@link FlashMap} tests.
@@ -31,18 +33,17 @@ public class FlashMapTests {
 
 	@Test
 	public void isExpired() throws InterruptedException {
+		assertFalse(new FlashMap().isExpired());
+
 		FlashMap flashMap = new FlashMap();
 		flashMap.startExpirationPeriod(0);
-
-		Thread.sleep(1);
+		Thread.sleep(100);
 
 		assertTrue(flashMap.isExpired());
 	}
 
 	@Test
 	public void notExpired() throws InterruptedException {
-		assertFalse(new FlashMap().isExpired());
-
 		FlashMap flashMap = new FlashMap();
 		flashMap.startExpirationPeriod(10);
 		Thread.sleep(100);
@@ -71,4 +72,51 @@ public class FlashMapTests {
 		assertEquals(0, flashMap1.compareTo(flashMap2));
 	}
 
+	@Test
+	public void addTargetRequestParamNullValue() {
+		FlashMap flashMap = new FlashMap();
+		flashMap.addTargetRequestParam("text", "abc");
+		flashMap.addTargetRequestParam("empty", " ");
+		flashMap.addTargetRequestParam("null", null);
+		
+		assertEquals(1, flashMap.getTargetRequestParams().size());
+		assertEquals("abc", flashMap.getTargetRequestParams().getFirst("text"));
+	}
+
+	@Test
+	public void addTargetRequestParamsNullValue() {
+		MultiValueMap<String, String> params = new LinkedMultiValueMap<String, String>();
+		params.add("key", "abc");
+		params.add("key", " ");
+		params.add("key", null);
+		
+		FlashMap flashMap = new FlashMap();
+		flashMap.addTargetRequestParams(params);
+		
+		assertEquals(1, flashMap.getTargetRequestParams().size());
+		assertEquals(1, flashMap.getTargetRequestParams().get("key").size());
+		assertEquals("abc", flashMap.getTargetRequestParams().getFirst("key"));
+	}
+
+	@Test
+	public void addTargetRequestParamNullKey() {
+		FlashMap flashMap = new FlashMap();
+		flashMap.addTargetRequestParam(" ", "abc");
+		flashMap.addTargetRequestParam(null, "abc");
+		
+		assertTrue(flashMap.getTargetRequestParams().isEmpty());
+	}
+
+	@Test
+	public void addTargetRequestParamsNullKey() {
+		MultiValueMap<String, String> params = new LinkedMultiValueMap<String, String>();
+		params.add(" ", "abc");
+		params.add(null, " ");
+		
+		FlashMap flashMap = new FlashMap();
+		flashMap.addTargetRequestParams(params);
+		
+		assertTrue(flashMap.getTargetRequestParams().isEmpty());
+	}
+	
 }

org.springframework.web.servlet/src/test/java/org/springframework/web/servlet/config/AnnotationDrivenBeanDefinitionParserTests.java

@@ -67,6 +67,7 @@ public class AnnotationDrivenBeanDefinitionParserTests {
 		MessageCodesResolver resolver = ((ConfigurableWebBindingInitializer) initializer).getMessageCodesResolver();
 		assertNotNull(resolver);
 		assertEquals(TestMessageCodesResolver.class, resolver.getClass());
+		assertEquals(true, new DirectFieldAccessor(adapter).getPropertyValue("ignoreDefaultModelOnRedirect"));
 	}
 
 	@Test

org.springframework.web.servlet/src/test/java/org/springframework/web/servlet/config/annotation/WebMvcConfigurationSupportTests.java

@@ -150,6 +150,8 @@ public class WebMvcConfigurationSupportTests {
 		Validator validator = initializer.getValidator();
 		assertNotNull(validator);
 		assertTrue(validator instanceof LocalValidatorFactoryBean);
+		
+		assertEquals(true, new DirectFieldAccessor(adapter).getPropertyValue("ignoreDefaultModelOnRedirect"));
 	}
 	
 	@Test

org.springframework.web.servlet/src/test/java/org/springframework/web/servlet/mvc/method/annotation/RequestMappingHandlerAdapterTests.java

@@ -103,7 +103,7 @@ public class RequestMappingHandlerAdapterTests {
 		
 		handlerAdapter.setArgumentResolvers(Arrays.asList(redirectAttributesResolver, modelResolver));
 		handlerAdapter.setReturnValueHandlers(Arrays.asList(viewHandler));
-		handlerAdapter.setAlwaysUseRedirectAttributes(true);
+		handlerAdapter.setIgnoreDefaultModelOnRedirect(true);
 		handlerAdapter.afterPropertiesSet();
 
 		request.setAttribute(FlashMapManager.OUTPUT_FLASH_MAP_ATTRIBUTE, new FlashMap());
@@ -111,7 +111,7 @@ public class RequestMappingHandlerAdapterTests {
 		HandlerMethod handlerMethod = handlerMethod(new RedirectAttributeHandler(), "handle", Model.class);
 		ModelAndView mav = handlerAdapter.handle(request, response, handlerMethod);
 
-		assertTrue("No redirect attributes added, model should be empty", mav.getModel().isEmpty());
+		assertTrue("Without RedirectAttributes arg, model should be empty", mav.getModel().isEmpty());
 	}
 
 	@Test

org.springframework.web.servlet/src/test/java/org/springframework/web/servlet/mvc/method/annotation/ServletInvocableHandlerMethodTests.java

@@ -71,8 +71,8 @@ public class ServletInvocableHandlerMethodTests {
 		ServletInvocableHandlerMethod handlerMethod = getHandlerMethod("responseStatus");
 		handlerMethod.invokeAndHandle(webRequest, mavContainer);
 
-		assertFalse("Null return value + @ResponseStatus should result in 'no view resolution'",
-				mavContainer.isResolveView());
+		assertTrue("Null return value + @ResponseStatus should result in 'request handled'",
+				mavContainer.isRequestHandled());
 
 		assertEquals(HttpStatus.BAD_REQUEST.value(), response.getStatus());
 		assertEquals("400 Bad Request", response.getErrorMessage());
@@ -85,8 +85,8 @@ public class ServletInvocableHandlerMethodTests {
 		ServletInvocableHandlerMethod handlerMethod = getHandlerMethod("httpServletResponse", HttpServletResponse.class);
 		handlerMethod.invokeAndHandle(webRequest, mavContainer);
 
-		assertFalse("Null return value + HttpServletResponse arg should result in 'no view resolution'",
-				mavContainer.isResolveView());
+		assertTrue("Null return value + HttpServletResponse arg should result in 'request handled'",
+				mavContainer.isRequestHandled());
 	}
 
 	@Test
@@ -98,8 +98,8 @@ public class ServletInvocableHandlerMethodTests {
 		ServletInvocableHandlerMethod handlerMethod = getHandlerMethod("notModified");
 		handlerMethod.invokeAndHandle(webRequest, mavContainer);
 
-		assertFalse("Null return value + 'not modified' request should result in 'no view resolution'",
-				mavContainer.isResolveView());
+		assertTrue("Null return value + 'not modified' request should result in 'request handled'",
+				mavContainer.isRequestHandled());
 	}
 	
 	@Test

org.springframework.web.servlet/src/test/java/org/springframework/web/servlet/mvc/method/annotation/support/DefaultMethodReturnValueHandlerTests.java

@@ -17,6 +17,7 @@
 package org.springframework.web.servlet.mvc.method.annotation.support;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertSame;
 import static org.junit.Assert.assertTrue;
@@ -70,7 +71,7 @@ public class DefaultMethodReturnValueHandlerTests {
 		
 		assertEquals("viewName", mavContainer.getViewName());
 		assertSame(testBean, mavContainer.getModel().get("modelAttrName"));
-		assertTrue(mavContainer.isResolveView());
+		assertFalse(mavContainer.isRequestHandled());
 	}
 
 	@Test(expected=UnsupportedOperationException.class)

org.springframework.web.servlet/src/test/java/org/springframework/web/servlet/mvc/method/annotation/support/HttpEntityMethodProcessorTests.java

@@ -138,7 +138,7 @@ public class HttpEntityMethodProcessorTests {
 		Object result = processor.resolveArgument(paramHttpEntity, mavContainer, webRequest, null);
 
 		assertTrue(result instanceof HttpEntity);
-		assertTrue("The ResolveView flag shouldn't change", mavContainer.isResolveView());
+		assertFalse("The requestHandled flag shouldn't change", mavContainer.isRequestHandled());
 		assertEquals("Invalid argument", body, ((HttpEntity<?>) result).getBody());
 		verify(messageConverter);
 	}
@@ -179,7 +179,7 @@ public class HttpEntityMethodProcessorTests {
 
 		processor.handleReturnValue(returnValue, returnTypeResponseEntity, mavContainer, webRequest);
 
-		assertFalse(mavContainer.isResolveView());
+		assertTrue(mavContainer.isRequestHandled());
 		verify(messageConverter);
 	}
 
@@ -197,7 +197,7 @@ public class HttpEntityMethodProcessorTests {
 
 		processor.handleReturnValue(returnValue, returnTypeResponseEntityProduces, mavContainer, webRequest);
 
-		assertFalse(mavContainer.isResolveView());
+		assertTrue(mavContainer.isRequestHandled());
 		verify(messageConverter);
 	}
 
@@ -245,7 +245,7 @@ public class HttpEntityMethodProcessorTests {
 
 		processor.handleReturnValue(returnValue, returnTypeResponseEntity, mavContainer, webRequest);
 
-		assertFalse(mavContainer.isResolveView());
+		assertTrue(mavContainer.isRequestHandled());
 		assertEquals("headerValue", servletResponse.getHeader("headerName"));
 	}
 
@@ -264,7 +264,7 @@ public class HttpEntityMethodProcessorTests {
 
 		processor.handleReturnValue(returnValue, returnTypeResponseEntity, mavContainer, webRequest);
 
-		assertFalse(mavContainer.isResolveView());
+		assertTrue(mavContainer.isRequestHandled());
 		assertEquals("headerValue", outputMessage.getValue().getHeaders().get("header").get(0));
 		verify(messageConverter);
 	}

org.springframework.web.servlet/src/test/java/org/springframework/web/servlet/mvc/method/annotation/support/ModelAndViewMethodReturnValueHandlerTests.java

@@ -79,7 +79,7 @@ public class ModelAndViewMethodReturnValueHandlerTests {
 	public void handleReturnValueNull() throws Exception {
 		handler.handleReturnValue(null, getReturnValueParam("modelAndView"), mavContainer, webRequest);
 		
-		assertFalse(mavContainer.isResolveView());
+		assertTrue(mavContainer.isRequestHandled());
 	}
 
 	private MethodParameter getReturnValueParam(String methodName) throws Exception {

org.springframework.web.servlet/src/test/java/org/springframework/web/servlet/mvc/method/annotation/support/RequestPartMethodArgumentResolverTests.java

@@ -245,7 +245,7 @@ public class RequestPartMethodArgumentResolverTests {
 		Object actualValue = resolver.resolveArgument(parameter, mavContainer, webRequest, new ValidatingBinderFactory());
 
 		assertEquals("Invalid argument value", argValue, actualValue);
-		assertTrue("The ResolveView flag shouldn't change", mavContainer.isResolveView());
+		assertFalse("The requestHandled flag shouldn't change", mavContainer.isRequestHandled());
 		
 		verify(messageConverter);
 	}	

org.springframework.web.servlet/src/test/java/org/springframework/web/servlet/mvc/method/annotation/support/RequestResponseBodyMethodProcessorTests.java

@@ -140,7 +140,7 @@ public class RequestResponseBodyMethodProcessorTests {
 		Object result = processor.resolveArgument(paramRequestBodyString, mavContainer, webRequest, null);
 
 		assertEquals("Invalid argument", body, result);
-		assertTrue("The ResolveView flag shouldn't change", mavContainer.isResolveView());
+		assertFalse("The requestHandled flag shouldn't change", mavContainer.isRequestHandled());
 		verify(messageConverter);
 	}
 
@@ -211,7 +211,7 @@ public class RequestResponseBodyMethodProcessorTests {
 
 		processor.handleReturnValue(body, returnTypeString, mavContainer, webRequest);
 
-		assertFalse("The ResolveView flag wasn't turned off", mavContainer.isResolveView());
+		assertTrue("The requestHandled flag wasn't set", mavContainer.isRequestHandled());
 		verify(messageConverter);
 	}
 
@@ -228,7 +228,7 @@ public class RequestResponseBodyMethodProcessorTests {
 
 		processor.handleReturnValue(body, returnTypeStringProduces, mavContainer, webRequest);
 
-		assertFalse(mavContainer.isResolveView());
+		assertTrue(mavContainer.isRequestHandled());
 		verify(messageConverter);
 	}
 

org.springframework.web.servlet/src/test/java/org/springframework/web/servlet/mvc/method/annotation/support/ServletRequestMethodArgumentResolverTests.java

@@ -75,7 +75,7 @@ public class ServletRequestMethodArgumentResolverTests {
 		
 		assertTrue("ServletRequest not supported", isSupported);
 		assertSame("Invalid result", servletRequest, result);
-		assertTrue("The ResolveView flag shouldn't change", mavContainer.isResolveView());
+		assertFalse("The requestHandled flag shouldn't change", mavContainer.isRequestHandled());
 	}
 
 	@Test
@@ -89,7 +89,7 @@ public class ServletRequestMethodArgumentResolverTests {
 
 		assertTrue("Session not supported", isSupported);
 		assertSame("Invalid result", session, result);
-		assertTrue("The ResolveView flag shouldn't change", mavContainer.isResolveView());
+		assertFalse("The requestHandled flag shouldn't change", mavContainer.isRequestHandled());
 	}
 
 	@Test

org.springframework.web.servlet/src/test/java/org/springframework/web/servlet/mvc/method/annotation/support/ServletResponseMethodArgumentResolverTests.java

@@ -67,7 +67,7 @@ public class ServletResponseMethodArgumentResolverTests {
 
 		Object result = resolver.resolveArgument(servletResponseParameter, mavContainer, webRequest, null);
 		assertSame("Invalid result", servletResponse, result);
-		assertFalse(mavContainer.isResolveView());
+		assertTrue(mavContainer.isRequestHandled());
 	}
 
 	@Test
@@ -78,7 +78,7 @@ public class ServletResponseMethodArgumentResolverTests {
 
 		Object result = resolver.resolveArgument(outputStreamParameter, mavContainer, webRequest, null);
 		assertSame("Invalid result", servletResponse.getOutputStream(), result);
-		assertFalse(mavContainer.isResolveView());
+		assertTrue(mavContainer.isRequestHandled());
 	}
 
 	@Test
@@ -89,7 +89,7 @@ public class ServletResponseMethodArgumentResolverTests {
 
 		Object result = resolver.resolveArgument(writerParameter, mavContainer, webRequest, null);
 		assertSame("Invalid result", servletResponse.getWriter(), result);
-		assertFalse(mavContainer.isResolveView());
+		assertTrue(mavContainer.isRequestHandled());
 	}
 
 	public void supportedParams(ServletResponse p0, OutputStream p1, Writer p2) {

org.springframework.web.servlet/src/test/java/org/springframework/web/servlet/support/DefaultFlashMapManagerTests.java

@@ -163,9 +163,7 @@ public class DefaultFlashMapManagerTests {
 			allMaps.add(flashMap);
 			flashMap.startExpirationPeriod(0);
 		}
-		
-		Thread.sleep(5);
-
+		Thread.sleep(100);
 		this.flashMapManager.requestStarted(this.request);
 		
 		assertEquals(0, allMaps.size());
@@ -197,7 +195,7 @@ public class DefaultFlashMapManagerTests {
 		this.flashMapManager.setFlashMapTimeout(0);
 		this.flashMapManager.requestCompleted(this.request);
 
-		Thread.sleep(1);
+		Thread.sleep(100);
 		
 		List<FlashMap> allMaps = getFlashMaps();
 		

org.springframework.web.servlet/src/test/java/org/springframework/web/servlet/view/RedirectViewTests.java

@@ -129,7 +129,7 @@ public class RedirectViewTests {
 		assertEquals("http://url.somewhere.com/path?id=1", response.getHeader("Location"));
 		
 		assertEquals("/path", flashMap.getTargetRequestPath());
-		assertEquals(model, flashMap.getTargetRequestParams());
+		assertEquals(model, flashMap.getTargetRequestParams().toSingleValueMap());
 	}
 
 	@Test

org.springframework.web/src/main/java/org/springframework/web/method/annotation/ModelFactory.java

@@ -211,7 +211,7 @@ public final class ModelFactory {
 			this.sessionAttributesHandler.storeAttributes(request, mavContainer.getModel());
 		}
 		
-		if (mavContainer.isResolveView()) {
+		if (!mavContainer.isRequestHandled()) {
 			updateBindingResult(request, mavContainer.getModel());
 		} 
 	}

org.springframework.web/src/main/java/org/springframework/web/method/support/HandlerMethodArgumentResolver.java

@@ -22,7 +22,8 @@ import org.springframework.web.bind.support.WebDataBinderFactory;
 import org.springframework.web.context.request.NativeWebRequest;
 
 /**
- * Strategy interface for resolving method parameters into argument values in the context of a given request.
+ * Strategy interface for resolving method parameters into argument values in 
+ * the context of a given request.
  *
  * @author Arjen Poutsma
  * @since 3.1
@@ -30,21 +31,27 @@ import org.springframework.web.context.request.NativeWebRequest;
 public interface HandlerMethodArgumentResolver {
 
 	/**
-	 * Whether the given {@linkplain MethodParameter method parameter} is supported by this resolver.
+	 * Whether the given {@linkplain MethodParameter method parameter} is 
+	 * supported by this resolver.
 	 * 
 	 * @param parameter the method parameter to check
-	 * @return {@code true} if this resolver supports the supplied parameter; {@code false} otherwise
+	 * @return {@code true} if this resolver supports the supplied parameter; 
+	 * {@code false} otherwise
 	 */
 	boolean supportsParameter(MethodParameter parameter);
 
 	/**
-	 * Resolves a method parameter into an argument value from a given request. A {@link ModelAndViewContainer}
-	 * provides access to the model for the request. A {@link WebDataBinderFactory} provides a way to create
-	 * a {@link WebDataBinder} instance when needed for data binding and type conversion purposes.
+	 * Resolves a method parameter into an argument value from a given request. 
+	 * A {@link ModelAndViewContainer} provides access to the model for the 
+	 * request. A {@link WebDataBinderFactory} provides a way to create
+	 * a {@link WebDataBinder} instance when needed for data binding and 
+	 * type conversion purposes.
 	 * 
-	 * @param parameter the method parameter to resolve. This parameter must have previously been passed to
-	 * {@link #supportsParameter(org.springframework.core.MethodParameter)} and it must have returned {@code true}
-	 * @param mavContainer the {@link ModelAndViewContainer} for the current request
+	 * @param parameter the method parameter to resolve. This parameter must 
+	 * have previously been passed to 
+	 * {@link #supportsParameter(org.springframework.core.MethodParameter)} 
+	 * and it must have returned {@code true}
+	 * @param mavContainer the ModelAndViewContainer for the current request
 	 * @param webRequest the current request
 	 * @param binderFactory a factory for creating {@link WebDataBinder} instances
 	 * @return the resolved argument value, or {@code null}.

org.springframework.web/src/main/java/org/springframework/web/method/support/HandlerMethodReturnValueHandler.java

@@ -20,7 +20,8 @@ import org.springframework.core.MethodParameter;
 import org.springframework.web.context.request.NativeWebRequest;
 
 /**
- * Strategy interface to handle the value returned from the invocation of a handler method . 
+ * Strategy interface to handle the value returned from the invocation of a 
+ * handler method . 
  *
  * @author Arjen Poutsma
  * @since 3.1
@@ -28,24 +29,27 @@ import org.springframework.web.context.request.NativeWebRequest;
 public interface HandlerMethodReturnValueHandler {
 
 	/**
-	 * Whether the given {@linkplain MethodParameter method return type} is supported by this handler.
+	 * Whether the given {@linkplain MethodParameter method return type} is 
+	 * supported by this handler.
 	 *
 	 * @param returnType the method return type to check
-	 * @return {@code true} if this handler supports the supplied return type; {@code false} otherwise
+	 * @return {@code true} if this handler supports the supplied return type; 
+	 * {@code false} otherwise
 	 */
 	boolean supportsReturnType(MethodParameter returnType);
 
 	/**
-	 * Handle the given return value by adding attributes to the model, setting the view (or view name),
-	 * or by writing to the response. {@link HandlerMethodReturnValueHandler} implementations should also 
-	 * consider whether to set {@link ModelAndViewContainer#setResolveView(boolean)}, which is set to 
-	 * {@code true} by default and therefore needs to be set to {@code false} explicitly if view 
-	 * resolution is to be bypassed.  
+	 * Handle the given return value by adding attributes to the model and 
+	 * setting a view or setting the 
+	 * {@link ModelAndViewContainer#setRequestHandled} flag to {@code true}
+	 * to indicate the response has been handled directly.  
 	 * 
 	 * @param returnValue the value returned from the handler method
-	 * @param returnType the type of the return value. This type must have previously been passed to 
-	 * {@link #supportsReturnType(org.springframework.core.MethodParameter)} and it must have returned {@code true}
-	 * @param mavContainer the {@link ModelAndViewContainer} for the current request
+	 * @param returnType the type of the return value. This type must have 
+	 * previously been passed to 
+	 * {@link #supportsReturnType(org.springframework.core.MethodParameter)} 
+	 * and it must have returned {@code true}
+	 * @param mavContainer the ModelAndViewContainer for the current request
 	 * @param webRequest the current request
 	 * @throws Exception if the return value handling results in an error
 	 */

org.springframework.web/src/main/java/org/springframework/web/method/support/ModelAndViewContainer.java

@@ -28,14 +28,14 @@ import org.springframework.validation.support.BindingAwareModelMap;
  * {@link HandlerMethodReturnValueHandler}s during the course of invocation of 
  * a controller method.
  * 
- * <p>The {@link #setResolveView(boolean)} flag can be used to indicate that
- * view resolution is not required (e.g. {@code @ResponseBody} method).
+ * <p>The {@link #setRequestHandled} flag can be used to indicate the request
+ * has been handled directly and view resolution is not required.
  * 
- * <p>A default {@link Model} is created at instantiation and used thereafter. 
- * The {@link #setRedirectModel(ModelMap)} method can be used to provide a 
- * separate model to use potentially in case of a redirect. 
- * The {@link #setUseRedirectModel()} can be used to enable use of the 
- * redirect model if the controller decides to redirect. 
+ * <p>A default {@link Model} is automatically created at instantiation. 
+ * An alternate model instance may be provided via {@link #setRedirectModel} 
+ * for use in a redirect scenario. When {@link #setUseRedirectModel} is set 
+ * to {@code true} signalling a redirect scenario, the {@link #getModel()} 
+ * returns the redirect model instead of the default model.
  * 
  * @author Rossen Stoyanchev
  * @since 3.1
@@ -44,12 +44,14 @@ public class ModelAndViewContainer {
 
 	private Object view;
 	
-	private boolean resolveView = true;
+	private boolean requestHandled = false;
 	
 	private final ModelMap model = new BindingAwareModelMap();
 
 	private ModelMap redirectModel;
 
+	private boolean ignoreDefaultModelOnRedirect = false;
+	
 	private boolean useRedirectModel = false;
 
 	/**
@@ -99,7 +101,7 @@ public class ModelAndViewContainer {
 	}
 	
 	/**
-	 * Whether view resolution is required or not. 
+	 * Signal a scenario where the request is handled directly. 
 	 * <p>A {@link HandlerMethodReturnValueHandler} may use this flag to 
 	 * indicate the response has been fully handled and view resolution 
 	 * is not required (e.g. {@code @ResponseBody}).
@@ -109,54 +111,64 @@ public class ModelAndViewContainer {
 	 * a complete response depending on the method return value.
 	 * <p>The default value is {@code true}.
 	 */
-	public void setResolveView(boolean resolveView) {
-		this.resolveView = resolveView;
+	public void setRequestHandled(boolean requestHandled) {
+		this.requestHandled = requestHandled;
 	}
 	
 	/**
-	 * Whether view resolution is required or not.
+	 * Whether the request is handled directly.
 	 */
-	public boolean isResolveView() {
-		return this.resolveView;
+	public boolean isRequestHandled() {
+		return this.requestHandled;
 	}
 
 	/**
-	 * Return the default model created at instantiation or the one provided 
-	 * via {@link #setRedirectModel(ModelMap)} as long as it has been enabled 
-	 * via {@link #setUseRedirectModel()}.
+	 * Return the model to use. This is either the default model created at 
+	 * instantiation or the redirect model if {@link #setUseRedirectModel} 
+	 * is set to {@code true}. If a redirect model was never provided via 
+	 * {@link #setRedirectModel}, return the default model unless 
+	 * {@link #setIgnoreDefaultModelOnRedirect} is set to {@code true}.
 	 */
 	public ModelMap getModel() {
-		if ((this.redirectModel != null) && this.useRedirectModel) {
+		if (!this.useRedirectModel) {
+			return this.model;
+		}
+		else if (this.redirectModel != null) {
 			return this.redirectModel;
 		}
 		else {
-			return this.model;
+			return this.ignoreDefaultModelOnRedirect ? new ModelMap() : this.model;
 		}
 	}
 	
 	/**
-	 * Provide a model instance to use in case the controller redirects. 
-	 * Note that {@link #setUseRedirectModel()} must also be called in order 
-	 * to enable use of the redirect model.
+	 * Provide a separate model instance to use in a redirect scenario. 
+	 * The provided additional model however is not used used unless 
+	 * {@link #setUseRedirectModel(boolean)} gets set to {@code true} to signal
+	 * a redirect scenario.
 	 */
 	public void setRedirectModel(ModelMap redirectModel) {
 		this.redirectModel = redirectModel;
 	}
 
 	/**
-	 * Return the redirect model provided via 
-	 * {@link #setRedirectModel(ModelMap)} or {@code null} if not provided.
+	 * When set to {@code true} the default model is never used in a redirect
+	 * scenario. So if a redirect model is not available, an empty model is 
+	 * used instead.
+	 * <p>When set to {@code false} the default model can be used in a redirect
+	 * scenario if a redirect model is not available.
+	 * <p>The default setting is {@code false}.
 	 */
-	public ModelMap getRedirectModel() {
-		return this.redirectModel;
+	public void setIgnoreDefaultModelOnRedirect(boolean ignoreDefaultModelOnRedirect) {
+		this.ignoreDefaultModelOnRedirect = ignoreDefaultModelOnRedirect;
 	}
 
 	/**
-	 * Indicate that the redirect model provided via 
-	 * {@link #setRedirectModel(ModelMap)} should be used.
+	 * Signal the conditions for using a redirect model are in place -- e.g. 
+	 * the controller has requested a redirect.
 	 */
-	public void setUseRedirectModel() {
-		this.useRedirectModel = true;
+	public void setUseRedirectModel(boolean useRedirectModel) {
+		this.useRedirectModel = useRedirectModel;
 	}
 
 	/**
@@ -210,7 +222,7 @@ public class ModelAndViewContainer {
 	@Override
 	public String toString() {
 		StringBuilder sb = new StringBuilder("ModelAndViewContainer: ");
-		if (isResolveView()) {
+		if (!isRequestHandled()) {
 			if (isViewReference()) {
 				sb.append("reference to view with name '").append(this.view).append("'");
 			}
@@ -220,7 +232,7 @@ public class ModelAndViewContainer {
 			sb.append("; model is ").append(getModel());
 		}
 		else {
-			sb.append("View resolution not required");
+			sb.append("Request handled directly");
 		}
 		return sb.toString();
 	}

org.springframework.web/src/main/java/org/springframework/web/util/WebUtils.java

@@ -724,29 +724,4 @@ public abstract class WebUtils {
 		return urlPath.substring(begin, end);
 	}
 
-	/**
-	 * Extracts the path from the given URL by removing the query at the end 
-	 * and the scheme and authority in the front, if present.
-	 * @param url a URL, never {@code null}
-	 * @return the extracted URL path
-	 */
-	public static String extractUrlPath(String url) {
-		// Remove query/fragment
-		int end = url.indexOf('?');
-		if (end == -1) {
-			end = url.indexOf('#');
-			if (end == -1) {
-				end = url.length();
-			}
-		}
-		url = url.substring(0, end);
-		// Remove scheme + authority
-		int start = url.indexOf("://");
-		if (start != -1) {
-			start = url.indexOf('/', start + 3);
-			url = (start != -1 ) ? url.substring(start) : "";
-		}
-		return url;
-	}
-	
 }

org.springframework.web/src/test/java/org/springframework/web/method/support/ModelAndViewContainerTests.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright 2002-2011 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.web.method.support;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.springframework.ui.ModelMap;
+
+/**
+ * Test fixture for {@link ModelAndViewContainer}.
+ *
+ * @author Rossen Stoyanchev
+ * @since 3.1
+ */
+public class ModelAndViewContainerTests {
+
+	private ModelAndViewContainer mavContainer;
+
+	@Before
+	public void setup() {
+		this.mavContainer = new ModelAndViewContainer();
+	}
+	
+	@Test
+	public void getModel() {
+		this.mavContainer.addAttribute("name", "value");
+		assertEquals(1, this.mavContainer.getModel().size());
+	}
+
+	@Test
+	public void getModelRedirectModel() {
+		ModelMap redirectModel = new ModelMap("name", "redirectValue");
+		this.mavContainer.setRedirectModel(redirectModel);
+		this.mavContainer.addAttribute("name", "value");
+		
+		assertEquals("Default model should be used if not in redirect scenario",
+				"value", this.mavContainer.getModel().get("name"));
+	
+		this.mavContainer.setUseRedirectModel(true);
+		
+		assertEquals("Redirect model should be used in redirect scenario", 
+				"redirectValue", this.mavContainer.getModel().get("name"));
+	}
+
+	@Test
+	public void getModelIgnoreDefaultModelOnRedirect() {
+		this.mavContainer.addAttribute("name", "value");
+		this.mavContainer.setUseRedirectModel(true);
+		
+		assertEquals("Default model should be used since no redirect model was provided", 
+				1, this.mavContainer.getModel().size());
+
+		this.mavContainer.setIgnoreDefaultModelOnRedirect(true);
+		
+		assertEquals("Empty model should be returned if no redirect model is available", 
+				0, this.mavContainer.getModel().size());
+	}
+
+}

org.springframework.web/src/test/java/org/springframework/web/util/WebUtilsTests.java

@@ -64,15 +64,4 @@ public class WebUtilsTests {
 		assertEquals("view.html", WebUtils.extractFullFilenameFromUrlPath("/products/view.html?param=/path/a.do"));
 	}
 
-	@Test
-	public void extractUriPath() {
-		assertEquals("", WebUtils.extractUrlPath("http://example.com"));
-		assertEquals("/", WebUtils.extractUrlPath("http://example.com/"));
-		assertEquals("/rfc/rfc3986.txt", WebUtils.extractUrlPath("http://www.ietf.org/rfc/rfc3986.txt"));
-		assertEquals("/over/there", WebUtils.extractUrlPath("http://example.com/over/there?name=ferret#nose"));
-		assertEquals("/over/there", WebUtils.extractUrlPath("http://example.com/over/there#nose"));
-		assertEquals("/over/there", WebUtils.extractUrlPath("/over/there?name=ferret#nose"));
-		assertEquals("/over/there", WebUtils.extractUrlPath("/over/there?url=http://example.com"));
-	}
-	
 }