java - Explanation of the model object in Spring

Question

@Controller
public class GreetingController {

    @GetMapping("/greeting")
    public String greeting(HttpServletRequest request, Model model) {

        String name = request.getParameter("name");
        model.addAttribute("name", name);

        return "greeting";
    }
}

What does the Model do? Is this essentially the context variables that are passed to the "greeting.html" file? Is the only use of it addAttributes that will then be passed to the HTML template? Where could I read more about what Model does and how it should be used?

Answer 1

Did you see the documentation of Model?

Java-5-specific interface that defines a holder for model attributes. Primarily designed for adding attributes to the model. Allows for accessing the overall model as a java.util.Map.

Model is an essential part of MVC pattern which is widely used in Spring. As you have said, a Model is a holder of the context data passed by a Controller to be displayed on a View.

You can use only one Model which contains more data distinct with a unique key because the Model is based on the java.util.Map - as the documentation says..