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Spring MVC Internal Flow

Spring Web MVC enforces a Front Controller architecture. A single centralized Java Servlet handles absolutely every distinct HTTP request entering the entire application cleanly.

In Spring, this specialized Front Controller is called the DispatcherServlet.

The Flow Diagram​

When a user's browser targets a URL mapping inside your Spring application natively, the internal flow operates systematically:

Flow Breakdown​

  1. DispatcherServlet: Captures the initial HTTP GET or POST request globally.
  2. HandlerMapping: An internal directory mechanism mapping the network URL path (e.g., /users/login) to the correct custom Java Controller class.
  3. Controller Execution: Your custom code runs. It communicates with backend databases securely, verifies business rules, and packages the results into a Model payload perfectly. It explicitly returns a "Logical View Name" (e.g., the string "home").
  4. ViewResolver: The DispatcherServlet asks the ViewResolver to translate the string "home" into a physical template path natively (e.g., /WEB-INF/templates/home.html).
  5. View Rendering: The final HTML text parser binds the Model data precisely inside the dynamic HTML template securely, rendering standard text seamlessly back to the browser user correctly.