What is the workflow of the Spring MVC framework?

The execution flow of the Spring MVC framework is as follows:

1. The client sends an HTTP request to the server and it is received by the DispatcherServlet.
2. DispatcherServlet locates the corresponding HandlerMapping based on the URL path of the request to obtain the Controller responsible for handling that request.
3. The HandlerMapping forwards the request to the Controller and returns a HandlerExecutionChain object, which contains the method that will handle the request and any relevant interceptors.
4. The Controller executes a handling method, processes the request, and returns a ModelAndView object that contains the processing results and the view name.
5. The HandlerInterceptor interceptor intercepts and processes actions before and after the execution of the handling method.
6. The Controller passes the ModelAndView object to the DispatcherServlet.
7. DispatcherServlet uses the ViewResolver resolver to find the corresponding View view based on the view name.
8. The View renders the ModelAndView object to generate the final response content.
9. Ultimately, the response is sent back to the client.

It should be noted that in the above process, steps 3 and 5 can involve multiple interceptors, which can preprocess and postprocess requests, as well as handle exceptions.