How does Spring MVC work?

Controller – A controller contains the business logic of an application. Here, the @Controller annotation is used to mark the class as the controller. Front Controller – In Spring Web MVC, the DispatcherServlet class works as the front controller. It is responsible to manage the flow of the Spring MVC application.

How does Spring MVC work internally?

Spring MVC is request driven and DispatcherServlet handles the request from client and then dispatches the request to controllers. It tightly integrates with the Spring IoC container and allows the developers to use every features of Spring framework.

How does a spring application works?

Spring Boot automatically configures your application based on the dependencies you have added to the project by using @EnableAutoConfiguration annotation. For example, if MySQL database is on your classpath, but you have not configured any database connection, then Spring Boot auto-configures an in-memory database.

What is @controller and @RestController?

The @Controller annotation indicates that the class is a “Controller” like a web controller while @RestController annotation indicates that the class is a controller where @RequestMapping methods assume @ResponseBody semantics by default i.e. servicing REST API.

How does a request flow happen in Spring MVC?

The Flow of DispathcherServlet in Spring MVC That’s all about how DispatcherServlet process a web request in Spring MVC. As I said, it scans through all @Controler classes and @RequestMapping to find out all the handler methods and create a mapping of it. It then routes an incoming request to appropriate handlers.

Is Spring Boot Spring MVC?

Spring Boot is a module of Spring for packaging the Spring-based application with sensible defaults. Spring MVC is a model view controller-based web framework under the Spring framework. It provides default configurations to build Spring-powered framework.

How do spring boot annotations work?

Spring Boot Annotations is a form of metadata that provides data about a program that is not a part of the program itself. They do not have any direct effect on the operation of the code they annotate. Spring Boot Annotations do not use XML and instead use the convention over configuration principle.