Show List
Tutorials > Spring MVC > Handling request and response with Controllers

Handling request and response with Controllers

In Spring MVC, Controllers are responsible for handling incoming HTTP requests and returning a response to the client. The process of handling requests and returning a response is referred to as request handling.

There are two main types of controllers in Spring MVC:

  1. Annotation-based controllers: These are the most commonly used controllers in Spring MVC. They use annotations to define the request mapping and specify which methods should handle which requests.

Example:

 @Controller
public class MyController { @RequestMapping("/handleRequest") public String handleRequest(Model model) { model.addAttribute("message", "Hello, World!"); return "hello"; } }
  1. Implementing the Controller interface: You can also create a controller by implementing the org.springframework.web.servlet.mvc.Controller interface and defining a handleRequest method.

Example:

public class MyController implements Controller {

  public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
    ModelAndView mav = new ModelAndView();
    mav.addObject("message", "Hello, World!");
    mav.setViewName("hello");
    return mav;
  }

}
In both of the above examples, the handleRequest method is handling an incoming request, adding data to a model, and returning a view name (or a complete view) to be rendered.


Next: Sample Spring MVC CRUD Application

    Leave a Comment

  • captcha text