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In this quick article, we will understand step by step how spring MVC works internally. This is one of the frequently asked interview questions on the Spring MVC framework.

Learn Spring MVC at https://www.javaguides.net/p/spring-mvc-tutorial.html

Check out Three Tier (Three Layer) Architecture in Spring MVC Web Application

Components in Spring MVC

- DispatcherServlet

- Handler Mapper

- Controller

- ViewResolver

- View

How Spring MVC Works Internally | Spring MVC Request Flow

The above diagram represents how an HTTP request is processed from start to end in the Spring MVC framework step by step.

Step 1 - When the client (browser) sends an HTTP request to a specific URL. The DispatcherServlet of Spring MVC receives the request.

Step 2 - DispatcherServlet consult to HandlerMapper to identify which controller is responsible to handle the HTTP request.

Step 3 - HandlerMapper selects the controller which is mapped to the incoming request URL and returns the (selected Handler) and Controller details to DispatcherServlet.

Step 4 - Now DispatcherServlet knows which controller is responsible to process the request so DispatcherServlet will forward that request to the corresponding controller to process the request.

Step 5 - Now the Controller process the request, validates the request, and creates a model with data. Finally, the Controller returns the logical name of view and model to the DispatcherServlet.

Step 6 - DispatcherServlet consult ViewResolver to resolve a logical view with the physical view that exists in the application.

Step 7 - ViewResolver responsible to map logical view with actual view and return the actual view details back to the DispatcherServlet.

Step 8 - Now DispatcherServlet sends the view and model to the View component.

Step 9 - The View component merge view and model and forms a plain HTML output. Finally, the View component sends HTML output back to the DispatcherServlet.

Step 10 - The DispatcherServlet finally sends HTML output as a response back to the browser for rendering.

Video

This article explained in-detail with an example in below YouTube video:

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How Spring MVC Works Internally

Components in Spring MVC

How Spring MVC Works Internally | Spring MVC Request Flow

Step 1 - When the client (browser) sends an HTTP request to a specific URL. The DispatcherServlet of Spring MVC receives the request.

Step 2 - DispatcherServlet consult to HandlerMapper to identify which controller is responsible to handle the HTTP request.

Step 3 - HandlerMapper selects the controller which is mapped to the incoming request URL and returns the (selected Handler) and Controller details to DispatcherServlet.

Step 4 - Now DispatcherServlet knows which controller is responsible to process the request so DispatcherServlet will forward that request to the corresponding controller to process the request.

Step 5 - Now the Controller process the request, validates the request, and creates a model with data. Finally, the Controller returns the logical name of view and model to the DispatcherServlet.

Step 6 - DispatcherServlet consult ViewResolver to resolve a logical view with the physical view that exists in the application.

Step 7 - ViewResolver responsible to map logical view with actual view and return the actual view details back to the DispatcherServlet.

Step 8 - Now DispatcherServlet sends the view and model to the View component.

Step 9 - The View component merge view and model and forms a plain HTML output. Finally, the View component sends HTML output back to the DispatcherServlet.

Step 10 - The DispatcherServlet finally sends HTML output as a response back to the browser for rendering.

Video

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Spring Boot 3 Paid Course Published for Free
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How Spring MVC Works Internally

Components in Spring MVC

How Spring MVC Works Internally | Spring MVC Request Flow

Step 1 - When the client (browser) sends an HTTP request to a specific URL. The DispatcherServlet of Spring MVC receives the request.

Step 2 - DispatcherServlet consult to HandlerMapper to identify which controller is responsible to handle the HTTP request.

Step 3 - HandlerMapper selects the controller which is mapped to the incoming request URL and returns the (selected Handler) and Controller details to DispatcherServlet.

Step 4 - Now DispatcherServlet knows which controller is responsible to process the request so DispatcherServlet will forward that request to the corresponding controller to process the request.

Step 5 - Now the Controller process the request, validates the request, and creates a model with data. Finally, the Controller returns the logical name of view and model to the DispatcherServlet.

Step 6 - DispatcherServlet consult ViewResolver to resolve a logical view with the physical view that exists in the application.

Step 7 - ViewResolver responsible to map logical view with actual view and return the actual view details back to the DispatcherServlet.

Step 8 - Now DispatcherServlet sends the view and model to the View component.

Step 9 - The View component merge view and model and forms a plain HTML output. Finally, the View component sends HTML output back to the DispatcherServlet.

Step 10 - The DispatcherServlet finally sends HTML output as a response back to the browser for rendering.

Video

My Top and Bestseller Udemy Courses. The sale is going on with a 70 - 80% discount. The discount coupon has been added to each course below:

Build REST APIs with Spring Boot 4, Spring Security 7, and JWT

[NEW] Learn Apache Maven with IntelliJ IDEA and Java 25

ChatGPT + Generative AI + Prompt Engineering for Beginners

Spring 7 and Spring Boot 4 for Beginners (Includes 8 Projects)

Building Real-Time REST APIs with Spring Boot - Blog App

Building Microservices with Spring Boot and Spring Cloud

Java Full-Stack Developer Course with Spring Boot and React JS

Build 5 Spring Boot Projects with Java: Line-by-Line Coding

Testing Spring Boot Application with JUnit and Mockito

Spring Boot Thymeleaf Real-Time Web Application - Blog App

Master Spring Data JPA with Hibernate

Spring Boot + Apache Kafka Course - The Practical Guide

Java Testing: Mastering JUnit 5 Framework

Reactive Programming in Java: Spring WebFlux and Testing

Spring Boot + RabbitMQ Course - The Practical Guide

Functional Programming in Java (Includes Java Collections)

ChatGPT for Java Developers: Boost Your Productivity with AI

Comments

Post a Comment

Spring Boot 3 Paid Course Published for Free on my Java Guides YouTube Channel

Spring Boot 3 Paid Course Published for Free
on my Java Guides YouTube Channel