spring formController 调用过程

ScanProductController ModelAndView onSubmit(HttpServletRequest request, HttpServletResponse response, Object command, BindException errors)

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SimpleFormController  ModelAndView onSubmit(
   HttpServletRequest request, HttpServletResponse response, Object command, BindException errors)

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BaseFormController ModelAndView processFormSubmission(HttpServletRequest request,
                                              HttpServletResponse response,
                                              Object command,
                                              BindException errors)

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AbstractFormController ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response)

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ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response)

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SimpleControllerHandlerAdapter

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 ModelAndView handle(HttpServletRequest request, HttpServletResponse response, Object handler)

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DispatcherServlet doDispatch(HttpServletRequest request, HttpServletResponse response)

mv = ha.handle(processedRequest, response, mappedHandler.getHandler());

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render(ModelAndView mv, HttpServletRequest request, HttpServletResponse response)  渲染页面