Your Complete Spring Boot Roadmap: Beginner to Pro

From Java Developer to Spring Boot Expert – Build Scalable, Enterprise-Level Applications with Ease

Basic overview

What is Spring Boot?

Why Learn Spring Boot?

Estimated time commitment for the roadmap.

Phases of the Spring Boot Roadmap

Phase 1: Prerequisites

Core Java (OOPs, Collections, Exception Handling)

Maven or Gradle Basics

Understanding REST Architecture

Introduction to Spring Framework (IoC, DI, AOP)

Phase 2: Getting Started with Spring Boot

What is Spring Boot?

Differences Between Spring and Spring Boot

Setting up Spring Boot Project (Spring Initializr)

Project Structure and Configuration

Creating Your First REST API

Phase 3: Spring Boot Core Concepts

Auto Configuration & Spring Boot Starters

Profiles & Application Properties/YAML

Logging with SLF4J & Logback

Understanding Beans, Annotations (@Component, @Service, etc.)

Phase 4: Building RESTful APIs

@RestController and @RequestMapping

GET, POST, PUT, DELETE Methods

Path Variables and Request Parameters

Exception Handling with @ControllerAdvice

API Versioning

Phase 5: Spring Data JPA & Hibernate

Introduction to ORM

Entity, Repository, and DAO Layers

CRUD Operations with JPA

Custom Queries with JPQL & Native SQL

Relationships (One-to-One, Many-to-One, etc.)

Pagination and Sorting

Phase 6: Database Integration

Connecting to MySQL / PostgreSQL / H2

Flyway or Liquibase for Database Migrations

JDBC Template vs JPA

Phase 7: Validation and Security

Input Validation with Hibernate Validator (@Valid, @NotNull, etc.)

Introduction to Spring Security

Implementing Basic Authentication

JWT Authentication and Authorization

Role-Based Access Control

Phase 8: Advanced Features

Consuming External APIs (RestTemplate / WebClient)

Caching with Spring Cache (EhCache, Redis)

Scheduling Tasks (@Scheduled)

File Upload & Download

Phase 9: Testing

Unit Testing with JUnit and Mockito

Integration Testing with Spring Boot Test

Test REST APIs with Postman or Swagger

Phase 10: Spring Boot with Microservices

What are Microservices?

Spring Cloud Basics

Eureka Server & Service Discovery

Spring Cloud Config

API Gateway with Zuul / Spring Cloud Gateway

Circuit Breaker with Resilience4J

Phase 11: Docker and Deployment

Creating Dockerfile for Spring Boot App

Docker Compose

Deploying to Cloud (Heroku, AWS, GCP)

CI/CD Introduction (GitHub Actions / Jenkins)

Phase 12: Bonus Topics

Actuator for Monitoring

Swagger/OpenAPI Integration

Reactive Programming with Spring WebFlux

Kafka and Messaging Integration

Real-world Project Building

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