🧠 Spring Boot Basic : Learning Roadmap

📘 Phase 1: Fundamentals Overview

#	Topic	Description
1	Introduction Preview	High-level overview of Spring Boot and its advantages
2	Introduction to Spring Boot	Core concepts, opinionated defaults, and use cases
3	Setting up the Development Environment	Installing and configuring JDK, Maven, IntelliJ IDEA, and required plugins
4	Creating a Spring Boot Project	Using Spring Initializr and Maven archetype to generate projects
5	Understanding the Project Structure	Exploring src/main/java, src/main/resources, and pom.xml layout and roles
6	Dependency Management	Understanding Maven dependencies, Spring Boot Starter POMs, and version control
7	Running Spring Boot Applications	Running, testing, and verifying Spring Boot apps from IDE or CLI

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⚙️ Phase 2: Core Concepts — Dependency Injection & Beans

#	Topic	Description
1	What is Dependency Injection?	Understanding DI principles and benefits in Spring
2	The Spring IoC Container	How the container manages object creation and wiring
3	Exercise – Implementing a Notification Service	Practical example to understand service-based dependency injection
4	Exercise – Implementing a User Registration Service	Building a small app to explore @Service, @Repository, and DI in action
5	Configuring Beans Using Annotations	Defining and managing beans with annotations like @Component, @Service, etc.
6	Controlling Bean Selection	Using qualifiers and priorities to choose between multiple beans
7	@Component	Marking a class as a Spring-managed component
8	@Service	Specialized stereotype annotation for service-layer components
9	@Qualifier	Explicitly selecting the right bean when multiple implementations exist
10	@Primary	Setting a default bean when multiple candidates are present
11	@Autowired	Automatic dependency injection by type
12	@Value	Injecting simple values (from application.properties or constants) into beans
13	getBeans()	Retrieving beans programmatically from the application context
14	@Bean (Scope & Lifecycle)	Understanding custom bean creation, scopes (singleton, prototype), and lifecycle callbacks
15	@Configuration	Defining configuration classes that manage bean definitions and dependency wiring