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RequestContextUtils (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.web.servlet.support
Class RequestContextUtils

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

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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

See Also:

RequestContext, DispatcherServlet

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Constructor Summary
RequestContextUtils()

 

Method Summary
static Locale	getLocale(HttpServletRequest request)           Retrieves 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 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 WebApplicationContext	getWebApplicationContext(ServletRequest request)           Look for the WebApplicationContext associated with the DispatcherServlet that has initiated request processing.
static WebApplicationContext	getWebApplicationContext(ServletRequest 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.

 

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

 

Constructor Detail

RequestContextUtils

public RequestContextUtils()

Method Detail

getWebApplicationContext

public static WebApplicationContext getWebApplicationContext(ServletRequest request)
                                                      throws IllegalStateException

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

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getWebApplicationContext

public static WebApplicationContext getWebApplicationContext(ServletRequest request,
                                                             ServletContext servletContext)
                                                      throws IllegalStateException

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

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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

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getLocale

public static Locale getLocale(HttpServletRequest request)

Retrieves 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.

Parameters:

request - current HTTP request

Returns:

the current locale, either from the LocaleResolver or from the plain request

See Also:

getLocaleResolver(javax.servlet.http.HttpServletRequest), ServletRequest.getLocale()

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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

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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

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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)

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