How does SpringMVC work?

Spring MVC is a framework based on the Model-View-Controller (MVC) design pattern, used for developing web applications. It operates as follows:

1. The client sends an HTTP request to the DispatcherServlet.
2. DispatcherServlet is the core controller of the Spring MVC framework. Upon receiving a request, it looks for the corresponding handler mapper (HandlerMapping) based on the URL path of the request.
3. The processor mapper finds the corresponding controller based on the configured URL mapping rules.
4. The processor handles the request and returns a ModelAndView object that includes the model data of the request handling result and the view name.
5. The DispatcherServlet resolves the view name to a specific view object using a view resolver.
6. The view object is responsible for rendering model data and returning the generated HTML content to the client.
7. The client receives the HTML content and displays it in the browser.

During the entire process, the Spring MVC framework offers a series of components to handle requests, parse views, and model data. The core controller, DispatcherServlet, is responsible for this, while the handler mapper is utilized to locate handlers, view resolver is used for parsing views, and model data is passed through the ModelAndView object. This allows for the decoupling of business logic, views, and model data, enhancing the maintainability and scalability of the code.