public final String getCancelParamKey() 
{
		return this.cancelParamKey;
}

Return the key of the request parameter used to identify a cancel request.

 public final String getCancelView() 
{
		return this.cancelView;
}

Gets the name of the cancel view.

 protected boolean isCancelRequest(HttpServletRequest request) 
{
		return WebUtils.hasSubmitParameter(request, getCancelParamKey());
}

Determine whether the incoming request is a request to cancel the processing of the current form.

By default, this method returns true if a parameter matching the configured cancelParamKey is present in the request, otherwise it returns false. Subclasses may override this method to provide custom logic to detect a cancel request.

The parameter is recognized both when sent as a plain parameter ("_cancel") or when triggered by an image button ("_cancel.x").

 protected boolean isFormSubmission(HttpServletRequest request) 
{
		return super.isFormSubmission(request) || isCancelRequest(request);
}

Consider an explicit cancel request as a form submission too.

 protected ModelAndView onCancel(Object command) throws Exception 
{
		return new ModelAndView(getCancelView());
}

Simple onCancel version. Called by the default implementation of the onCancel version with all parameters.

Default implementation returns eturns the configured cancelView. Subclasses may override this method to build a custom ModelAndView that may contain model parameters used in the cancel view.

If you simply want to move the user to a new view and you don't want to add additional model parameters, use #setCancelView(String) rather than overriding an onCancel method.

 protected ModelAndView onCancel(HttpServletRequest request,
    HttpServletResponse response,
    Object command) throws Exception 
{
		return onCancel(command);
}

Callback method for handling a cancel request. Called if #isCancelRequest returns true.

Default implementation delegates to onCancel(Object) to return the configured cancelView. Subclasses may override either of the two methods to build a custom ModelAndView that may contain model parameters used in the cancel view.

If you simply want to move the user to a new view and you don't want to add additional model parameters, use #setCancelView(String) rather than overriding an onCancel method.

 protected ModelAndView processFormSubmission(HttpServletRequest request,
    HttpServletResponse response,
    Object command,
    BindException errors) throws Exception 
{
		if (isCancelRequest(request)) {
			return onCancel(request, response, command);
		}
		else {
			return super.processFormSubmission(request, response, command, errors);
		}
}

This implementation first checks to see if the incoming is a cancel request, through a call to #isCancelRequest . If so, control is passed to #onCancel ; otherwise, control is passed up to SimpleFormController#processFormSubmission .

 public final  void setCancelParamKey(String cancelParamKey) 
{
	                                       
		this.cancelParamKey = cancelParamKey;
}

Set the key of the request parameter used to identify a cancel request. Default is "_cancel".

The parameter is recognized both when sent as a plain parameter ("_cancel") or when triggered by an image button ("_cancel.x").

 public final  void setCancelView(String cancelView) 
{
		this.cancelView = cancelView;
}

Sets the name of the cancel view.

 protected boolean suppressValidation(HttpServletRequest request,
    Object command) 
{
		return super.suppressValidation(request, command) || isCancelRequest(request);
}

Suppress validation for an explicit cancel request too.