What does ModelAndView return?
When you return a ModelAndView all information that needs to be passed from the controller is embedded inside it. No suprise there. If you return a String, it will assume that this is the name of the view to use.
How many parameters does ModelAndView?
Convenient constructor when there is no model data to expose. Create a new ModelAndView given a view name and a model. Convenient constructor to take a single model object….org.springframework.web.portlet. Class ModelAndView.
| Method Summary | |
|---|---|
| void | setView(Object view) Set a View object for this ModelAndView. |
What is ModelAndView addObject?
addObject. public ModelAndView addObject(Object attributeValue) Add an attribute to the model using parameter name generation. Parameters: attributeValue – the object to add to the model (never null ) See Also: ModelMap.addAttribute(Object) , getModelMap()
What is ModelAndView in Java?
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 difference between model and ModelAndView?
Model is an interface while ModelMap is a class. ModelAndView is just a container for both a ModelMap and a view object. It allows a controller to return both as a single value.
When should I use ModelAndView and model?
Model defines a holder for model attributes and is primarily designed for adding attributes to the model. ModelMap is an extension of Model with the ability to store attributes in a map and chain method calls. ModelAndView is a holder for a model and a view; it allows to return both model and view in one return value.
What are some of the valid return types of a controller method?
There are many return types are available for Handler method which is annotated by @RequestMapping inside controller like :
- ModelAndView (Class)
- Model (Interface)
- Map.
- String.
- void.
- View.
- HttpEntity or ResponseEntity
- HttpHeaders.
What is use of @ModelAttribute?
The @ModelAttribute is an annotation that binds a method parameter or method return value to a named model attribute and then exposes it to a web view. In the following example, we will demonstrate the usability and functionality of the annotation, through a common concept: a form submitted from a company’s employee.
How do I return a controller model?
To return a model from the controller action method to the view, we need to pass the model/object in the View() method. Here, the View gets the model as UserNamePasswordModel object with its property set. To retrieve properties of this object in the view, we can use @Model ; like @Model. UserName or @Model.
Which type of objects do action return?
Action Method Return Type
- Void.
- Primitive type or Complex type.
- HttpResponseMessage.
- IHttpActionResult.
What is the difference between ModelAndView and model?
3 Answers. Model is an interface while ModelMap is a class. ModelAndView is just a container for both a ModelMap and a view object. It allows a controller to return both as a single value.
What is the difference between modelandview and viewresolver in spring?
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 . The following application uses ModelAndView to return a model and a view in one step in a Spring controller.
How do I get the current datetime in modelandview?
The home page contains a link to show today’s datetime. In the show.ftl view we show the current datetime with $ {} syntax. We run the server and locate to localhost:8080 to get the home page, which has the link. In this tutorial, we have organized model and view with ModelAndView .
What is the difference between model and view in MVC?
ModelAndView 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.
How do I show the current datetime in Spring Boot modelandview?
A ModelAndView is created and filled with data. The data is a formatted datetime object. The view name is set with setViewName () . Spring resolves the view name to show.ftl . The home page contains a link to show today’s datetime. In the show.ftl view we show the current datetime with $ {} syntax.