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?

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Why Learn Spring Boot?

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Estimated time commitment for the roadmap.

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Phases of the Spring Boot Roadmap

Phase 1: Prerequisites

Core Java (OOPs, Collections, Exception Handling)

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Maven or Gradle Basics

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Understanding REST Architecture

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Introduction to Spring Framework (IoC, DI, AOP)

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Phase 2: Getting Started with Spring Boot

What is Spring Boot?

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Differences Between Spring and Spring Boot

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Setting up Spring Boot Project (Spring Initializr)

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Project Structure and Configuration

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Creating Your First REST API

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Phase 3: Spring Boot Core Concepts

Auto Configuration & Spring Boot Starters

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Profiles & Application Properties/YAML

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Logging with SLF4J & Logback

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

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Phase 4: Building RESTful APIs

@RestController and @RequestMapping

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GET, POST, PUT, DELETE Methods

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Path Variables and Request Parameters

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Exception Handling with @ControllerAdvice

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API Versioning

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Phase 5: Spring Data JPA & Hibernate

Introduction to ORM

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Entity, Repository, and DAO Layers

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CRUD Operations with JPA

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Custom Queries with JPQL & Native SQL

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

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Pagination and Sorting

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Phase 6: Database Integration

Connecting to MySQL / PostgreSQL / H2

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Flyway or Liquibase for Database Migrations

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JDBC Template vs JPA

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Phase 7: Validation and Security

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

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Introduction to Spring Security

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Implementing Basic Authentication

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JWT Authentication and Authorization

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Role-Based Access Control

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Phase 8: Advanced Features

Consuming External APIs (RestTemplate / WebClient)

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Caching with Spring Cache (EhCache, Redis)

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Scheduling Tasks (@Scheduled)

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File Upload & Download

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Phase 9: Testing

Unit Testing with JUnit and Mockito

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Integration Testing with Spring Boot Test

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Test REST APIs with Postman or Swagger

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Phase 10: Spring Boot with Microservices

What are Microservices?

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Spring Cloud Basics

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Eureka Server & Service Discovery

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Spring Cloud Config

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API Gateway with Zuul / Spring Cloud Gateway

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Circuit Breaker with Resilience4J

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Phase 11: Docker and Deployment

Creating Dockerfile for Spring Boot App

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Docker Compose

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Deploying to Cloud (Heroku, AWS, GCP)

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CI/CD Introduction (GitHub Actions / Jenkins)

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Phase 12: Bonus Topics

Actuator for Monitoring

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Swagger/OpenAPI Integration

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Reactive Programming with Spring WebFlux

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Kafka and Messaging Integration

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Real-world Project Building

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