java model.addAttribute

The `model.addAttribute` method is a method provided by the Spring MVC framework in Java, which allows you to add attributes to the model object that will be used to render a view. The `model` object is an instance of the `Model` interface that is passed as a parameter to the controller method.

Here is an example of how to use `model.addAttribute` to add an attribute to the model object:

@GetMapping("/hello")
public String hello(Model model) {
    String message = "Hello, World!";
    model.addAttribute("message", message);
    return "hello";
}

In this example, we are adding an attribute called "message" with the value "Hello, World!" to the model object. This attribute can then be accessed in the view using the `${message}` expression.