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-run, -TEST, -grap, -JAR, -war, -install, -uninstall, --init, -shell, -help.

To check the DESCRIPTION, run spring --help from the terminal.

Spring Boot CLI is a command-line interface that allows you to CREATE a spring-based java application USING Groovy.

Example: You don’t need to create getter and setter method or access modifier, return statement. If you use the JDBC template, it automatically loads for you.

Spring Initializer is a web application that helps you to create an initial spring boot project structure and provides a maven or GRADLE file to build your CODE. It solves the PROBLEM of setting up a framework when you are STARTING a project from scratch.

Spring boot starter is a maven template that contains a collection of all the relevant transitive dependencies that are NEEDED to start a particular functionality.
Like we NEED to IMPORT spring-boot-starter-web dependency for CREATING a web APPLICATION.

Just like any other Java program, a Spring BOOT APPLICATION MUST have a main method. This method serves as an ENTRY point, which invokes the SpringApplication#run method to bootstrap the application.

Spring BOOT application scans all the beans and package DECLARATIONS when the application initializes. You NEED to add the @ComponentScan annotation for your class file to SCAN your components added to your project.

The @SpringBootApplication ANNOTATION is EQUIVALENT to using @Configuration, @EnableAutoConfiguration, and @ComponentScan with their default attributes. Spring Boot enables the developer to use a single annotation instead of using multiple. But, as we know, Spring PROVIDED LOOSELY coupled features that we can use for each annotation as per our PROJECT needs.

SPRING Boot automatically CONFIGURES your application based on the dependencies you have ADDED to the project by using annotation. The ENTRY point of the spring boot application is the class that contains @SpringBootApplication annotation and the main method.

Spring Boot automatically SCANS all the components included in the project by using @ComponentScan annotation.

Spring BOOT provides numbers of STARTER dependency, here are the most COMMONLY used -

• Data JPA starter.
• Test Starter.
• Security starter.
• Web starter.
• Mail starter.
• Thymeleaf starter.

Below are some key POINTS which spring boot OFFERS but spring doesn’t:

• Starter POM.
• Version Management.
• Auto Configuration.
• Component Scanning.
• Embedded server.
• InMemory DB.
• Actuators

Spring Boot simplifies the spring FEATURE for the USER:

Below are the four key COMPONENTS of SPRING-boot:

• Spring Boot auto-configuration.
• Spring Boot CLI.
• Spring Boot STARTER POMs.
• Spring Boot ACTUATORS.

The advantages of Spring Boot are listed below:

• Easy to understand and develop spring applications.
• Spring Boot is nothing but an existing FRAMEWORK with the addition of an embedded HTTP server and annotation CONFIGURATION which makes it EASIER to understand and FASTER the process of development.
• Increases PRODUCTIVITY and reduces development time.
• Minimum configuration.
• We don’t need to write any XML configuration, only a few annotations are required to do the configuration.