ModelMap vs Model in Spring MVC
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.
Simply put, the model can supply attributes used for rendering views.
ModelMap - ModelMap class is basically a LinkedHashMap. It add some methods for convenience. Just like the Model interface above, ModelMap is also used to pass values to render a view.
The advantage of ModelMap is it gives us the ability to pass a collection of values and treat these values as if they were within a Map:
@GetMapping("/printViewPage")public String passParametersWithModelMap(ModelMap map) { map.addAttribute("welcomeMessage", "welcome"); map.addAttribute("message", "Baeldung"); return "viewPage";}reference;