java.lang.Object
- org.springframework.web.servlet.support.RequestContextUtils

```
public abstract class RequestContextUtils
extends Object
```
Utility class for easy access to request-specific state which has been set by the DispatcherServlet.
Supports lookup of current WebApplicationContext, LocaleResolver, Locale, ThemeResolver, Theme, and MultipartResolver.
Since:
03.03.2003
Author:
Juergen Hoeller, Rossen Stoyanchev
See Also:
RequestContext, DispatcherServlet

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`REQUEST_DATA_VALUE_PROCESSOR_BEAN_NAME`	The name of the bean to use to look up in an implementation of `RequestDataValueProcessor` has been configured.

Constructor Summary
Constructors
Constructor Description
RequestContextUtils()

Method Summary

All Methods Static Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`static WebApplicationContext`	`findWebApplicationContext(HttpServletRequest request)`	Look for the WebApplicationContext associated with the DispatcherServlet that has initiated request processing, and for the global context if none was found associated with the current request.
`static WebApplicationContext`	`findWebApplicationContext(HttpServletRequest request, ServletContext servletContext)`	Look for the WebApplicationContext associated with the DispatcherServlet that has initiated request processing, and for the global context if none was found associated with the current request.
`static FlashMapManager`	`getFlashMapManager(HttpServletRequest request)`	Return the `FlashMapManager` instance to save flash attributes.
`static Map<String,?>`	`getInputFlashMap(HttpServletRequest request)`	Return read-only "input" flash attributes from request before redirect.
`static Locale`	`getLocale(HttpServletRequest request)`	Retrieve the current locale from the given request, using the LocaleResolver bound to the request by the DispatcherServlet (if available), falling back to the request's accept-header Locale.
`static LocaleResolver`	`getLocaleResolver(HttpServletRequest request)`	Return the LocaleResolver that has been bound to the request by the DispatcherServlet.
`static FlashMap`	`getOutputFlashMap(HttpServletRequest request)`	Return "output" FlashMap to save attributes for request after redirect.
`static Theme`	`getTheme(HttpServletRequest request)`	Retrieves the current theme from the given request, using the ThemeResolver and ThemeSource bound to the request by the DispatcherServlet.
`static ThemeResolver`	`getThemeResolver(HttpServletRequest request)`	Return the ThemeResolver that has been bound to the request by the DispatcherServlet.
`static ThemeSource`	`getThemeSource(HttpServletRequest request)`	Return the ThemeSource that has been bound to the request by the DispatcherServlet.
`static TimeZone`	`getTimeZone(HttpServletRequest request)`	Retrieve the current time zone from the given request, using the TimeZoneAwareLocaleResolver bound to the request by the DispatcherServlet (if available), falling back to the system's default time zone.
`static WebApplicationContext`	`getWebApplicationContext(ServletRequest request)`	Deprecated. as of Spring 4.2.1, in favor of `findWebApplicationContext(HttpServletRequest)`
`static WebApplicationContext`	`getWebApplicationContext(ServletRequest request, ServletContext servletContext)`	Deprecated. as of Spring 4.2.1, in favor of `findWebApplicationContext(HttpServletRequest, ServletContext)`

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

- Field Detail
  - REQUEST_DATA_VALUE_PROCESSOR_BEAN_NAME
```
public static final String REQUEST_DATA_VALUE_PROCESSOR_BEAN_NAME
```
    The name of the bean to use to look up in an implementation of RequestDataValueProcessor has been configured.
    Since:
    4.2.1
    See Also:
    Constant Field Values
- Constructor Detail
  - RequestContextUtils
```
public RequestContextUtils()
```
- Method Detail
  - getWebApplicationContext
```
@Deprecated
public static WebApplicationContext getWebApplicationContext(ServletRequest request)
                                                      throws IllegalStateException
```
    Deprecated.
    as of Spring 4.2.1, in favor of findWebApplicationContext(HttpServletRequest)
    Look for the WebApplicationContext associated with the DispatcherServlet that has initiated request processing.
    Parameters:
    request - current HTTP request
    Returns:
    the request-specific web application context
    Throws:
    IllegalStateException - if no servlet-specific context has been found
    See Also:
    getWebApplicationContext(ServletRequest, ServletContext)
  - getWebApplicationContext
```
@Deprecated
public static WebApplicationContext getWebApplicationContext(ServletRequest request,
                                                             ServletContext servletContext)
                                                      throws IllegalStateException
```
    Deprecated.
    as of Spring 4.2.1, in favor of findWebApplicationContext(HttpServletRequest, ServletContext)
    Look for the WebApplicationContext associated with the DispatcherServlet that has initiated request processing, and for the global context if none was found associated with the current request. This method is useful to allow components outside the framework, such as JSP tag handlers, to access the most specific application context available.
    Parameters:
    request - current HTTP request
    servletContext - current servlet context
    Returns:
    the request-specific WebApplicationContext, or the global one if no request-specific context has been found
    Throws:
    IllegalStateException - if neither a servlet-specific nor a global context has been found
    See Also:
    DispatcherServlet.WEB_APPLICATION_CONTEXT_ATTRIBUTE, WebApplicationContextUtils.getRequiredWebApplicationContext(ServletContext)
  - findWebApplicationContext
```
public static WebApplicationContext findWebApplicationContext(HttpServletRequest request,
                                                              ServletContext servletContext)
```
    Look for the WebApplicationContext associated with the DispatcherServlet that has initiated request processing, and for the global context if none was found associated with the current request. The global context will be found via the ServletContext or via ContextLoader's current context.
    NOTE: This variant remains compatible with Servlet 2.5, explicitly checking a given ServletContext instead of deriving it from the request.
    Parameters:
    request - current HTTP request
    servletContext - current servlet context
    Returns:
    the request-specific WebApplicationContext, or the global one if no request-specific context has been found, or null if none
    Since:
    4.2.1
    See Also:
    DispatcherServlet.WEB_APPLICATION_CONTEXT_ATTRIBUTE, WebApplicationContextUtils.getWebApplicationContext(ServletContext), ContextLoader.getCurrentWebApplicationContext()
  - findWebApplicationContext
```
public static WebApplicationContext findWebApplicationContext(HttpServletRequest request)
```
    Look for the WebApplicationContext associated with the DispatcherServlet that has initiated request processing, and for the global context if none was found associated with the current request. The global context will be found via the ServletContext or via ContextLoader's current context.
    NOTE: This variant requires Servlet 3.0+ and is generally recommended for forward-looking custom user code.
    Parameters:
    request - current HTTP request
    Returns:
    the request-specific WebApplicationContext, or the global one if no request-specific context has been found, or null if none
    Since:
    4.2.1
    See Also:
    findWebApplicationContext(HttpServletRequest, ServletContext), ServletRequest.getServletContext(), ContextLoader.getCurrentWebApplicationContext()
  - getLocaleResolver
```
public static LocaleResolver getLocaleResolver(HttpServletRequest request)
```
    Return the LocaleResolver that has been bound to the request by the DispatcherServlet.
    Parameters:
    request - current HTTP request
    Returns:
    the current LocaleResolver, or null if not found
  - getLocale
```
public static Locale getLocale(HttpServletRequest request)
```
    Retrieve the current locale from the given request, using the LocaleResolver bound to the request by the DispatcherServlet (if available), falling back to the request's accept-header Locale.
    This method serves as a straightforward alternative to the standard Servlet ServletRequest.getLocale() method, falling back to the latter if no more specific locale has been found.
    Consider using LocaleContextHolder.getLocale() which will normally be populated with the same Locale.
    Parameters:
    request - current HTTP request
    Returns:
    the current locale for the given request, either from the LocaleResolver or from the plain request itself
    See Also:
    getLocaleResolver(javax.servlet.http.HttpServletRequest), LocaleContextHolder.getLocale()
  - getTimeZone
```
public static TimeZone getTimeZone(HttpServletRequest request)
```
    Retrieve the current time zone from the given request, using the TimeZoneAwareLocaleResolver bound to the request by the DispatcherServlet (if available), falling back to the system's default time zone.
    Note: This method returns null if no specific time zone can be resolved for the given request. This is in contrast to getLocale(javax.servlet.http.HttpServletRequest) where there is always the request's accept-header locale to fall back to.
    Consider using LocaleContextHolder.getTimeZone() which will normally be populated with the same TimeZone: That method only differs in terms of its fallback to the system time zone if the LocaleResolver hasn't provided a specific time zone (instead of this method's null).
    Parameters:
    request - current HTTP request
    Returns:
    the current time zone for the given request, either from the TimeZoneAwareLocaleResolver or null if none associated
    See Also:
    getLocaleResolver(javax.servlet.http.HttpServletRequest), LocaleContextHolder.getTimeZone()
  - getThemeResolver
```
public static ThemeResolver getThemeResolver(HttpServletRequest request)
```
    Return the ThemeResolver that has been bound to the request by the DispatcherServlet.
    Parameters:
    request - current HTTP request
    Returns:
    the current ThemeResolver, or null if not found
  - getThemeSource
```
public static ThemeSource getThemeSource(HttpServletRequest request)
```
    Return the ThemeSource that has been bound to the request by the DispatcherServlet.
    Parameters:
    request - current HTTP request
    Returns:
    the current ThemeSource
  - getTheme
```
public static Theme getTheme(HttpServletRequest request)
```
    Retrieves the current theme from the given request, using the ThemeResolver and ThemeSource bound to the request by the DispatcherServlet.
    Parameters:
    request - current HTTP request
    Returns:
    the current theme, or null if not found
    See Also:
    getThemeResolver(javax.servlet.http.HttpServletRequest)
  - getInputFlashMap
```
public static Map<String,?> getInputFlashMap(HttpServletRequest request)
```
    Return read-only "input" flash attributes from request before redirect.
    Parameters:
    request - current request
    Returns:
    a read-only Map, or null if not found
    See Also:
    FlashMap
  - getOutputFlashMap
```
public static FlashMap getOutputFlashMap(HttpServletRequest request)
```
    Return "output" FlashMap to save attributes for request after redirect.
    Parameters:
    request - current request
    Returns:
    a FlashMap instance, never null within a DispatcherServlet-handled request
  - getFlashMapManager
```
public static FlashMapManager getFlashMapManager(HttpServletRequest request)
```
    Return the FlashMapManager instance to save flash attributes.
    Parameters:
    request - the current request
    Returns:
    a FlashMapManager instance, never null within a DispatcherServlet-handled request

Class RequestContextUtils

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

REQUEST_DATA_VALUE_PROCESSOR_BEAN_NAME

Constructor Detail

RequestContextUtils

Method Detail

getWebApplicationContext

getWebApplicationContext

findWebApplicationContext

findWebApplicationContext

getLocaleResolver

getLocale

getTimeZone

getThemeResolver

getThemeSource

getTheme

getInputFlashMap

getOutputFlashMap

getFlashMapManager