ModelAndView and page forward

1, ModelAndView

If the return value is springMVC ModelAndView, which contains both the data model, view information is also included.

ModelAndView object may be used in the processing method of a method of adding the model data: addObject (String attributeName, Object attributeValue)

Set View: setView (String viewName)

2, forwarded to the jsp page

Request processing method returns a string, the default server using the internal jump (Forward)

1 return "main";

Redirection, in front of the returned string plus "redirect: /"

1 return "redirect:/main.jsp";

Use ModelAndView object forwarding, forwarding default forward

1 mv.setViewName("main");

ModelAndView objects using redirection

1 mv.setViewName("redirect:/main.jsp");

3, the request is forwarded to the processing method of the controller

Forwarded to the specified method

1 return "forward:/main";

Redirected to the method

1 return "redirect:/main";

Use forwarding ModelAndView

1 mv.setViewName("forward:/main");

Use redirect ModelAndView

1 mv.setViewName("redirect:/main");

Note that, the redirection will re-initiate the request in your browser, you can not access the resource files under WEN-INF. Redirect must be added to the resource file extensions, namely .jsp.