What is flash attributes in spring?
Flash attributes are saved temporarily before the redirect (typically in the session) to be made available to the request after the redirect and removed immediately. Spring MVC has two main abstractions in support of flash attributes.
What is FlashMap?
A FlashMap provides a way for one request to store attributes intended for use in another. This is most commonly needed when redirecting from one URL to another — e.g. the Post/Redirect/Get pattern.
What is the scope of spring controller?
Spring MVC controllers are singleton by default and any controller object variable/field will be shared across all the requests and sessions. If the object variable should not be shared across requests, one can use @Scope(“request”) annotation above your controller class definition to create instance per request.
What is redirect attribute?
A RedirectAttributes model is empty when the method is called and is never used unless the method returns a redirect view name or a RedirectView. After the redirect, flash attributes are automatically added to the model of the controller that serves the target URL.
What is RedirectView in Java?
view. RedirectView redirects URL that can be absolute or relative to context. It can also be used as URI template and the values of template will automatically be replaced by the same key in the Model or attributes in RedirectAttributes . In RedirectView , there is a method setContextRelative() .
What is scope in Spring Java?
Scopes a single bean definition to the lifecycle of a single HTTP request; that is each and every HTTP request will have its own instance of a bean created off the back of a single bean definition. Only valid in the context of a web-aware Spring ApplicationContext. 4.
What is RedirectView spring?
What is spring boot RedirectView?
What is ModelAndView spring boot?
ModelAndView is a holder for both Model and View in the web MVC framework. These two classes are distinct; ModelAndView merely holds both to make it possible for a controller to return both model and view in a single return value. The view is resolved by a ViewResolver object; the model is data stored in a Map .
What is the key difference between using a and HttpServletResponse sendRedirect ()?
(a) forward executes on the client while sendRedirect() executes on the server. (b) forward executes on the server while sendRedirect() executes on the client. (c) The two methods perform identically.