SpringBoot MVC - SpringBoot Help

What is MVC?

It is a framework for building web applications in java which is based on MODEL-VIEW-CONTROLLER design pattern which leverages the features of core SpringBoot framework (IOC,DI)

Spring Boot MVC, make it easy to create MVC apps with very clear delineations and interactions. The Model represents formal underlying data constructs that the View uses to present the user with the look and feel of the application. A Controller is like a traffic cop. It receives incoming requests (traffic) and routes that traffic according to your application’s configuration.

To understand the basic architecture of the SpringBoot MVC see the below image:

Components of an MVC Application:

1. A set of webpages to layout UI components

2. A collection of Spring Beans(Controller , Services , etc)

3. Configuration (XML,ANNOTAIONS or JAVA)

SpringBoot MVC Front Controller :

This front controller known as DispatcherServlet

• Part of the spring framework

• Already developed by spring Dev team

What we will create?

1. Model Objects(Orange)

2. View templates(Dark Green)

3. Controller classes(Yellow)

Controller:

A controller contains the business logic of an application. Here, the @Controller annotation is used to mark the class as the controller.

• Code created by developer

• Contains your business logic

  • Handle the request

  • Store/Retrieve data(db,web service)

  • Place data in Model

• Send to appropriate view template

Model:

A model contains the data of the application. A data can be a single object or a collection of objects.Contains your data

• Store / Retrieve data via backend systems

  • database , webservice etc

• Place your data in Model

  • Data can be any Java Object/Collection

View:

A view represents the provided information in a particular format. Generally, JSP+JSTL is used to create a view page. Although spring also supports other view technologies such as Apache Velocity, Thymeleaf and FreeMarker.

• Other view templates supported

• Thymeleaf , Groovy

• Velocity , FreeMarker etc.

MVC Advantages:

• The SpringBoot way of building web app UIs in java

• Leverage a set of reusable UI components

• Help manage application state for web requests

• Process form data : validation , Conversion etc.

• Flexible configuration for the view layer

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