org.springframework.web.servlet.support Documentation Differences

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Context holder for request-specific state, like current web application context, current locale, current theme, and potential binding errors. Provides easy access to localized messages and Errors instances.

Suitable for exposition to views, and usage within JSP's "useBean" tag, JSP scriptlets, JSTL EL, Velocity templates, etc. Necessary for views that do not have access to the servlet request, like Velocity templates.

Can be instantiated manually, or automatically exposed to views as model attribute via AbstractView's "requestContextAttribute" property.

Will also work outside of DispatcherServlet requests, accessing the root WebApplicationContext and using an appropriate fallback for the locale (the HttpServletRequest's primary locale). @author Juergen Hoeller @since 03.03.2003 @see org.springframework.web.servlet.DispatcherServlet @see org.springframework.web.servlet.view.AbstractView#setRequestContextAttribute @see org.springframework.web.servlet.view.UrlBasedViewResolver#setRequestContextAttribute @see #getFallbackLocale()

Create a new RequestContext for the given request, using the given model attributes for Errors retrieval.

This works with all View implementations. It will typically be used by View implementations.

Will only work within a DispatcherServlet request. Pass in a ServletContext to be able to fallback to the root WebApplicationContext. @param request current HTTP request @param model the model attributes for the current view (can be null, using the request attributes for Errors retrieval) @see org.springframework.web.servlet.DispatcherServlet @see #RequestContext(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, javax.servlet.ServletContext, Map)

Return a context-aware URl for the given relative URL with placeholders (named keys with braces {}). For example, send in a relative URL foo/{bar}?spam={spam} and a parameter map {bar=baz,spam=nuts} and the result will be [contextpath]/foo/baz?spam=nuts. @param relativeUrl the relative URL part @param params a map of parameters to insert as placeholders in the url @return a URL that points back to the server with an absolute path (also URL-encoded accordingly)

Return the path to URL mappings within the current servlet including the the context path and the servlet path of the original request. This is useful for building links to other resources within the application where a a servlet mapping of the style {@code "/main/*"} is used.

Delegates to the UrlPathHelper for decoding the context path. @see javax.servlet.http.HttpServletRequest#getContextPath @see javax.servlet.http.HttpServletRequest#getServletPath() @see #getUrlPathHelper

Return the RequestDataValueProcessor instance to use obtained from the the WebApplicationContext under the name {@code "requestDataValueProcessor"}. Or {@code null} if no matching bean was found.