public ModelAndView() 
{

}

Default constructor for bean-style usage: populating bean properties instead of passing in constructor arguments.

Also see:

setView(View)
setViewName(String)

 public ModelAndView(String viewName) 
{
		this.view = viewName;
}

Convenient constructor when there is no model data to expose. Can also be used in conjunction with addObject.

Parameters:

viewName - name of the View to render, to be resolved by the DispatcherServlet's ViewResolver

Also see:

addObject

 public ModelAndView(View view) 
{
		this.view = view;
}

Convenient constructor when there is no model data to expose. Can also be used in conjunction with addObject.

Parameters:

view - View object to render

Also see:

addObject

 public ModelAndView(String viewName,
    Map model) 
{
		this.view = viewName;
		if (model != null) {
			getModelMap().addAllAttributes(model);
		}
}

Creates new ModelAndView given a view name and a model.

Parameters:

viewName - name of the View to render, to be resolved by the DispatcherServlet's ViewResolver

model - Map of model names (Strings) to model objects (Objects). Model entries may not be null, but the model Map may be null if there is no model data.

 public ModelAndView(View view,
    Map model) 
{
		this.view = view;
		if (model != null) {
			getModelMap().addAllAttributes(model);
		}
}

Creates new ModelAndView given a View object and a model. Note: the supplied model data is copied into the internal storage of this class. You should not consider to modify the supplied Map after supplying it to this class

Parameters:

view - View object to render

model - Map of model names (Strings) to model objects (Objects). Model entries may not be null, but the model Map may be null if there is no model data.

 public ModelAndView(String viewName,
    String modelName,
    Object modelObject) 
{
		this.view = viewName;
		addObject(modelName, modelObject);
}

Convenient constructor to take a single model object.

Parameters:

viewName - name of the View to render, to be resolved by the DispatcherServlet's ViewResolver

modelName - name of the single entry in the model

modelObject - the single model object

 public ModelAndView(View view,
    String modelName,
    Object modelObject) 
{
		this.view = view;
		addObject(modelName, modelObject);
}

Convenient constructor to take a single model object.

Parameters:

view - View object to render

modelName - name of the single entry in the model

modelObject - the single model object

 public ModelAndView addAllObjects(Map modelMap) 
{
		getModelMap().addAllAttributes(modelMap);
		return this;
}

Add all attributes contained in the provided Map to the model.

 public ModelAndView addObject(Object attributeValue) 
{
		getModelMap().addAttribute(attributeValue);
		return this;
}

Add an attribute to the model using parameter name generation.

 public ModelAndView addObject(String attributeName,
    Object attributeValue) 
{
		getModelMap().addAttribute(attributeName, attributeValue);
		return this;
}

Add an attribute to the model.

 public  void clear() 
{
		this.view = null;
		this.model = null;
		this.cleared = true;
}

Clear the state of this ModelAndView object. The object will be empty afterwards.

Can be used to suppress rendering of a given ModelAndView object in the postHandle method of a HandlerInterceptor.

 public Map getModel() 
{
		return getModelMap();
}

Return the model map. Never returns null. To be called by application code for modifying the model.

 protected Map getModelInternal() 
{
		return this.model;
}

Return the model map. May return null. Called by DispatcherServlet for evaluation of the model.

 public ModelMap getModelMap() 
{
		if (this.model == null) {
			this.model = new ModelMap();
		}
		return this.model;
}

Return the underlying ModelMap instance (never null).

 public View getView() 
{
		return (this.view instanceof View ? (View) this.view : null);
}

Return the View object, or null if we are using a view name to be resolved by the DispatcherServlet via a ViewResolver.

 public String getViewName() 
{
		return (this.view instanceof String ? (String) this.view : null);
}

Return the view name to be resolved by the DispatcherServlet via a ViewResolver, or null if we are using a View object.

 public boolean hasView() 
{
		return (this.view != null);
}

Indicate whether or not this ModelAndView has a view, either as a view name or as a direct View instance.

 public boolean isEmpty() 
{
		return (this.view == null && this.model == null);
}

Return whether this ModelAndView object is empty i.e. whether it does not hold any view and does not contain a model.

 public boolean isReference() 
{
		return (this.view instanceof String);
}

Return whether we use a view reference, i.e. true if the view has been specified via a name to be resolved by the DispatcherServlet via a ViewResolver.

 public  void setView(View view) 
{
		this.view = view;
}

Set a View object for this ModelAndView. Will override any pre-existing view name or View.

 public  void setViewName(String viewName) 
{
		this.view = viewName;
}

Set a view name for this ModelAndView, to be resolved by the DispatcherServlet via a ViewResolver. Will override any pre-existing view name or View.

 public String toString() 
{
		StringBuffer buf = new StringBuffer("ModelAndView: ");
		if (isReference()) {
			buf.append("reference to view with name '").append(this.view).append("'");
		}
		else {
			buf.append("materialized View is [").append(this.view).append(']");
		}
		buf.append("; model is ").append(this.model);
		return buf.toString();
}

Return diagnostic information about this model and view.

 public boolean wasCleared() 
{
		return (this.cleared && isEmpty());
}

Return whether this ModelAndView object is empty as a result of a call to #clear i.e. whether it does not hold any view and does not contain a model. Returns false if any additional state was added to the instance after the call to #clear .