Spring Web MVC is a lightweight web framework based on Java that implements the request-driven type of Web MVC design pattern. Even if the idea of the MVC architecture pattern is used, the web layer is decoupled. Request-driven refers to the use of the request-response model. The purpose of the framework is to help us simplify development. Spring Web MVC also simplifies our daily web development.
Spring Web MVC is also a service-to-worker model implementation, but it can be optimized. The front-end controller is a DispatcherServlet; the application controller is actually disassembled into a processor mapper (Handler Mapping) for processor management and view resolution (View Resolver) for view management; the page controller/action/processor is an implementation of the Controller interface (including only the ModelAndView handleRequest(request, response) method) (or any POJO class); supports localization (Locale) parsing, theme (Theme) parsing, file upload, etc.; provides a very flexible data verification, formatting and data binding mechanism; provides strong contract programming support with greater conventions than configuration (convention priority principle).
Spring Mvc processing flow:
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