The workflow of Spring MVC includes client sending request, front-end controller processing request, processor mapper parsing request, processor adapter executing controller method, processor executing business logic, view parser parsing view name, view rendering, and finally returning the response result to the client.

Spring MVC is a commonly used Java Web development framework. Based on MVC (Model-View-Controller) design pattern, it provides a clear, flexible and extensible way for developers to build Web applications. Workflow is a URL that a user sends a request to a Web server through a browser or other client to access a Spring MVC application.

In Spring MVC, the front-end controller is the DispatcherServlet, which is the core of the whole process. After receiving a user request, the DispatcherServlet is responsible for coordinating other components that process the request. The DispatcherServlet calls the processor mapper, and then the processor mapper determines and returns the processor (that is, the controller) that handles the request according to the URL or other identification of the request.

Subsequent process steps

The processor adapter executes the controller method, that is, the DispatcherServlet calls the processor adapter, which encapsulates a specific processor into an executable object and is responsible for executing the business logic in the processor. The processor executes corresponding business logic, can access model data, perform corresponding operations, and return ModelAndView objects or other response results.

After the processor executes the business logic, it returns a ModelAndView object that contains the view name and model data. DispatcherServlet calls the view parser to parse the view name into the actual view object. The view object is responsible for rendering the data to the final view result, which can be a template engine such as JSP, FreeMarker and Thymeleaf. After the view is rendered, the DispatcherServlet returns the response result to the client.

Reference to the above content: Baidu Encyclopedia -—Spring MVC