Spring Boot Tutorials

Spring Boot has revolutionized the way Java developers build production-ready applications. With its opinionated defaults, auto-configuration magic, and rich ecosystem, Spring Boot empowers you to develop stand-alone, scalable, and cloud-native applications with ease.

In this comprehensive series of Spring Boot tutorials, we walk you through the core concepts and advanced patterns needed to master Spring Boot. Whether you’re just starting out or looking to sharpen your enterprise development skills, these hands-on guides cover everything from REST API development, security, microservices architecture, DevOps practices, to cutting-edge topics like event-driven systems, multi-tenancy, and clean architecture.

Letโ€™s dive in and unlock the full potential of Spring Boot โ€” the framework trusted by millions to power modern Java applications.

Spring Boot Tutorials

๐ŸŒฑ Section 1 โ€” Spring Boot Fundamentals (Level 1)

  1. Introduction to Spring Boot 3.x: Why Itโ€™s the Best Time to Learn
  2. Setting up Spring Boot with Maven (Step-by-Step Guide)
  3. Understanding Spring Initializr (Complete Overview)
  4. Spring Boot Auto-Configuration Internals Explained
  5. Project Structure: Files, Folders, and Best Practices
  6. Key Spring Boot Annotations: @SpringBootApplication, @Component, @Configuration
  7. Dependency Injection in Spring Boot : Basics
  8. Spring Boot Properties: application.properties vs application.yml
  9. Using CommandLineRunner and ApplicationRunner
  10. Profiles in Spring Boot: Managing Multiple Environments

๐Ÿ—‚๏ธ Section 2 โ€” REST API Development (Level 2)

  1. Building Your First REST API in Spring Boot
  2. Understanding @RestController and @RequestMapping
  3. Path Variables, Request Params, and Query Params Explained
  4. Handling JSON Input and Output with Jackson
  5. Validation with @Valid and Bean Validation (Jakarta Validation)
  6. Global Exception Handling in Spring Boot with @ControllerAdvice
  7. Building Versioned REST APIs in Spring Boot
  8. Consuming External APIs using WebClient (Reactive HTTP Client)
  9. Handling File Upload and Download with Spring Boot REST
  10. Pagination and Sorting in REST APIs

๐Ÿ—„๏ธ Section 3 โ€” Data Persistence (Level 3)

  1. Introduction to Spring Data JPA with Hibernate
  2. Entity Relationships: OneToOne, OneToMany, ManyToMany Mapping
  3. DTO Mapping Best Practices in Spring Boot
  4. Native Queries and @Query Annotation
  5. Advanced JPA Criteria Queries in Spring Boot
  6. Database Initialization: schema.sql and data.sql
  7. Database Migrations with Flyway in Spring Boot 3
  8. Database Migrations with Liquibase in Spring Boot 3
  9. Using PostgreSQL with Spring Boot (Full Integration)
  10. MySQL and Spring Boot Configuration and Optimization

๐Ÿ” Section 4 โ€” Security (Level 4)

  1. Introduction to Spring Security 6 (Jakarta Security)
  2. Securing REST APIs with Basic Authentication
  3. JWT Authentication with Spring Security 6
  4. OAuth2 Login and Resource Server with Spring Boot 3
  5. Custom Authentication Provider and UserDetailsService
  6. Password Encryption with BCryptPasswordEncoder
  7. Role-Based Access Control (RBAC) in Spring Boot
  8. CORS Configuration for Secure APIs
  9. CSRF Protection in REST APIs
  10. Method-Level Security with @PreAuthorize and @Secured

โš™๏ธ Section 5 โ€” Advanced Spring Boot Features (Level 5)

  1. Spring Boot Actuator: Health Checks, Metrics & Monitoring
  2. Custom Actuator Endpoints in Spring Boot 3
  3. Spring Boot Application Events and Listeners
  4. Scheduling Tasks with @Scheduled
  5. Async Programming with @Async
  6. Using CompletableFuture with Async Methods
  7. Building Custom Starters in Spring Boot 3
  8. Property Binding using @ConfigurationProperties
  9. Externalized Configuration with Vault and AWS Secrets Manager
  10. Internationalization (i18n) in Spring Boot

๐Ÿงช Section 6 โ€” Testing & Test Automation (Level 6)

  1. Introduction to Testing Spring Boot Applications
  2. Unit Testing REST Controllers with MockMvc
  3. Testing Services and Repositories with @DataJpaTest
  4. Integration Testing with @SpringBootTest
  5. Using Testcontainers with Spring Boot for Database Tests
  6. Testing Security Configurations in Spring Boot
  7. Contract Testing with Spring Cloud Contract
  8. Load Testing Spring Boot APIs with Gatling
  9. Using WireMock for API Mocking in Integration Tests
  10. CI/CD Integration for Spring Boot Tests (GitHub Actions)

โ˜๏ธ Section 7 โ€” Microservices with Spring Boot (Level 7)

  1. Introduction to Microservices Architecture with Spring Boot
  2. Service Discovery with Spring Cloud Eureka
  3. Spring Cloud Gateway as API Gateway for Microservices
  4. Load Balancing with Spring Cloud LoadBalancer
  5. Client-to-Client Communication with OpenFeign
  6. Centralized Configuration with Spring Cloud Config Server
  7. Centralized Logging with ELK Stack (Elasticsearch, Logstash, Kibana)
  8. Circuit Breaker and Resilience with Resilience4j
  9. Distributed Tracing with Spring Cloud Sleuth and Zipkin
  10. Securing Microservices with OAuth2 and JWT in Spring Boot

๐Ÿš€ Section 8 โ€” Deployment & Operations (Level 8)

  1. Dockerizing Spring Boot Applications (Complete Guide)
  2. Multi-stage Docker Builds for Production-ready Spring Boot Images
  3. Kubernetes Deployment for Spring Boot Applications
  4. Kubernetes ConfigMaps and Secrets with Spring Boot
  5. Blue-Green Deployment Strategy with Spring Boot
  6. CI/CD Pipeline for Spring Boot with Jenkins
  7. Deploying Spring Boot on AWS Elastic Beanstalk
  8. Deploying Spring Boot on Google Cloud Platform
  9. Deploying Spring Boot on Azure (Spring Apps)
  10. Serverless Spring Boot using AWS Lambda

๐Ÿ”ฌ Section 9 โ€” Reactive Programming & WebFlux (Level 9)

  1. Introduction to Reactive Programming in Spring Boot
  2. Building Reactive REST APIs with Spring WebFlux
  3. Using Mono and Flux in Reactive APIs
  4. Reactive MongoDB Integration with Spring WebFlux
  5. Reactive Security with Spring Security and WebFlux
  6. Backpressure Handling in WebFlux
  7. Streaming APIs with Server-Sent Events (SSE)
  8. WebSockets with Spring Boot WebFlux
  9. Testing Reactive Applications with StepVerifier
  10. Comparing WebFlux vs. Traditional MVC

๐Ÿ”ฎ Section 10 โ€” Modern Topics & Best Practices (Level 10)

  1. Observability with Micrometer and Prometheus
  2. Distributed Caching with Redis in Spring Boot
  3. Rate Limiting APIs using Bucket4j
  4. Multi-Tenancy Architecture in Spring Boot Applications
  5. Clean Architecture and Hexagonal Design in Spring Boot
  6. Domain-Driven Design (DDD) Patterns in Spring Boot
  7. Event-Driven Architecture with Spring Kafka
  8. CQRS & Event Sourcing with Spring Boot
  9. Building SaaS Applications with Spring Boot 3
  10. The Future of Spring Boot: What’s Coming Next?

๐Ÿ Conclusion

Spring Boot continues to lead the way in building modern, scalable, and production-ready Java applications. Through this tutorial series, you’ve explored a wide range of topics โ€” from foundational REST APIs and configuration best practices to advanced patterns like microservices, distributed caching, observability, and SaaS architecture.

Whether you’re a beginner stepping into the Spring ecosystem or a seasoned developer enhancing your skill set, this series aims to equip you with practical knowledge and real-world examples that you can apply directly to your projects.

The journey doesnโ€™t end here โ€” as Spring Boot evolves with innovations like virtual threads, GraalVM native images, and cloud-native tooling, staying ahead means continually learning and adapting.

Keep building. Keep experimenting. And most importantly, keep coding with Spring Boot.