Spring Boot Fundamentals
Auto-configuration, starters, dependency injection, application config — the essentials to get productive quickly.
Data & Persistence
Spring Data JPA, transactions, entity mapping, database migrations, and query techniques.
Security & Testing
Authentication/Authorization, JWT, unit & integration testing, and production monitoring (Actuator).
⭐ Spring Boot Learning Roadmap
From Java basics → Spring Core → Spring Boot → RESTful services → Production readiness.
1. Java Prerequisites
Core Java (OOP, collections, exceptions), Maven/Gradle, Java 11+ features (var, streams, Optionals, lambdas).
2. Spring Core Concepts
IoC & DI, beans & scopes, application context, component scanning, configuration with @Configuration and properties.
3. Spring Boot Basics
Starters, auto-configuration, Spring Boot CLI, application.properties/yml, profiles, starters, embedded servers.
4. Building RESTful APIs
@RestController, request mapping, path & query params, DTOs, validation (@Valid), exception handling, HATEOAS basics.
5. Persistence with Spring Data JPA
Entities, repositories, CRUD, JPQL, derived queries, pagination & sorting, transactions, migrations with Flyway/Liquibase.
6. Spring Security
Security basics, form login, stateless JWT, method-level security, OAuth2 intro, CSRF and secure headers.
7. Testing
Unit testing with JUnit, mocking with Mockito, Spring Boot test slices, integration tests with @SpringBootTest, Testcontainers.
8. Observability & Production
Spring Boot Actuator, metrics, health checks, logging best practices (Logback), distributed tracing (OpenTelemetry), monitoring.
9. Asynchronous & Messaging
Async methods, scheduling, application events, messaging with RabbitMQ/Kafka, WebSockets basics.
10. Microservices Patterns
Service discovery, API Gateway, circuit breaker, config server, centralized logging, inter-service communication patterns.
11. Deployment & DevOps
Dockerizing Spring Boot apps, CI pipelines (GitHub Actions), container registries, Kubernetes basics, cloud deployment (AWS/GCP/Azure).
12. Advanced Topics
Reactive Spring (WebFlux), performance tuning, security hardening, custom starters, native images (GraalVM).