Model、ModelMap ModelAndView

public class ExtendedModelMap extends ModelMap implements Model

/**

 * Holder for both Model and View in the web MVC framework.

 * Note that these are entirely distinct. This class merely holds

 * both to make it possible for a controller to return both model

 * and view in a single return value.

 *

 * <p>Represents a model and view returned by a handler, to be resolved

 * by a DispatcherServlet. The view can take the form of a String

 * view name which will need to be resolved by a ViewResolver object;

 * alternatively a View object can be specified directly. The model

 * is a Map, allowing the use of multiple objects keyed by name.

 *

 * @author Rod Johnson

 * @author Juergen Hoeller

 * @author Rob Harrop

 * @see DispatcherServlet

 * @see ViewResolver

 * @see HandlerAdapter#handle

 * @see org.springframework.web.servlet.mvc.Controller#handleRequest

 */

public class ModelAndView {

 

/** View instance or view name String */

private Object view;

 

/** Model Map */

private ModelMap model;

}