How Spring MVC puts objects into the model

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Put objects into the model

In the application of the MVC architecture, the controller inputs data into the model, which is used in the view. As you can see from the example in the previous section, the addObject () of the ModelAndView class is used to put objects into the model in the form of name-value pairs:

ModelView.addObject ("listUser", listUser); modelView.addObject ("siteName", newString ("CodeJava.net")); modelView.addObject ("users", 1200000)

Spring also supports declaring Map type parameters in processor methods. Spring uses this mapping to store objects that will be put into the model. Such as:

@ RequestMapping (method = RequestMethod.GET) publicStringviewStats (Map model) {model.put ("siteName", "CodeJava.net"); model.put ("pageviews", 320000); return "Stats";}

This approach is simpler than using the ModelAndView object. Spring allows users to choose Map objects and ModelAndView objects flexibly.

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