Understanding Spring MVC Workflow and Its Core Components

The article begins with a promotional notice offering free activation codes for IDEA and PyCharm by replying "C1" to a public account.

It then presents a diagram of the Spring MVC workflow and proceeds to describe each step in detail.

1. The user sends a request to the front‑controller DispatcherServlet , which acts as the central entry point.

2. DispatcherServlet forwards the request to HandlerMapping to locate the appropriate handler based on URL, XML configuration, or annotations.

3. HandlerMapping returns a HandlerExecutionChain containing the handler (controller) and any interceptors.

4. DispatcherServlet invokes HandlerAdapter , which adapts the handler for execution.

5. HandlerAdapter calls the specific handler (controller) to process the request.

6. The controller returns a ModelAndView object containing model data and a logical view name.

7. HandlerAdapter passes the ModelAndView back to DispatcherServlet .

8. DispatcherServlet forwards the logical view name to ViewResolver , which resolves it to a concrete view implementation (e.g., JSP, Freemarker, PDF).

9. The resolved view renders the model data, producing the final response.

10. DispatcherServlet sends the rendered view back to the client as the HTTP response.

The article also outlines the responsibilities of each component: DispatcherServlet as the front controller, HandlerMapping for URL‑to‑handler mapping, HandlerAdapter for supporting various handler types, the developer‑implemented handler (controller), ViewResolver for view resolution, and the view itself for presentation.

Finally, the piece includes a brief advertisement for paid IDE licenses, encouraging readers to scan a QR code for purchase details.