Detailed training program
- Why you need this course between Java Core and your first Spring backend
- Creating a project skeleton and entering Gradle via Wrapper
- Plugins, repositories, and dependencies without IDE magic
- Build lifecycle, resources, and a single application entry point
- Transitive dependencies, useful commands, and a stable project baseline
- HTTP as the language of a backend developer
- HTTP methods and resource-oriented thinking
- Status codes, headers, and placing data in a request
- Stateless model, network failures, and the concept of an API contract
- JSON as the primary data exchange format
- DTO mindset and designing JSON contracts
- Postman as a working tool for exploring HTTP contracts
- Postman environments, negative-path, and protecting the course from an unstable external API
- Your first working HTTP client in Java 21
- URIs, POST, timeouts, and a chaos-free transport layer
- Jackson 3 and stable JSON mapping for the project
- Wrapping up the client phase of the project
- Backend project structure and manual dependency wiring
- Domain, DTO, response model, and a unified error contract
- Configuration outside the code: properties, env vars, and args
- Logging with SLF4J and Logback as minimum operational culture
- Entering the server phase of the project via JDK HttpServer
- Routing, incoming requests, and JSON responses without Spring MVC
- Read-only part of the local API
- Create, update, patch, delete, and applied HTTP semantics of CRUD
- Manual validation, unified error response, result packaging, and the bridge to Spring
- Why Spring is needed and what problem it solves
- IoC and DI before adding Spring
- Your first Spring context and the proper entry point
- What a bean is and how the container sees the application
- Component scanning and stereotype annotations
- @Configuration and @Bean without the myths
- Constructor injection as the primary style
- Multiple implementations of a single interface
- Optional dependencies, lazy wiring, and circular dependencies
- Bean lifecycle from startup to shutdown
- Scopes and object state in the container
- Externalized configuration and Environment
- Type conversion and binding inside the container
- Profiles and conditional application assembly
- Resource abstraction and working with external resources
- MessageSource and modular configuration
- Application Events as loose coupling for application parts
- @EventListener and the modern event model
- Startup pipeline and container extension points
- FactoryBean and Aware interfaces
- Spring's proxy model without the mystery
- Spring AOP basics as the foundation for future courses
- How to read legacy Spring and not be afraid of XML
- Testing pure Spring configuration
- Final knowledge assembly and the bridge to Spring Boot
- Why Spring Boot was created and what layer of backend development it covers
- Minimum Spring Core refresher, without which Boot turns into magic
- Project creation: Initializr, Gradle Wrapper, and application skeleton
- Dependency management and starters without fear
- Anatomy of a Boot application from main() to up-and-running runtime
- Application lifecycle, startup hooks, and early diagnostics
- Beans, dependency injection, and the project structure of a live Boot application
- Auto-configuration without the mystery
- Safe Boot customization
- The first web-baseline on Spring Boot
- MVC customization without framework takeover
- JSON baseline in Spring Boot 4
- Why externalized configuration is not "just application.yaml"
- Property sources and precedence without superficial understanding
- Profiles and environment strategy
- Import, additional locations, and modular configuration
- @ConfigurationProperties — the right path to type-safe configuration
- Immutable configuration, validation, and metadata
- DevTools and a fast feedback loop
- Logging fundamentals for a backend developer
- Modern logging in Boot 4
- Actuator baseline: visibility first, exposure later
- Actuator deeper: diagnostics, startup visibility, and custom health
- Packaging and running the application outside the IDE
- Container-friendly mindset before a separate Docker course
- Minimum testing baseline for any Boot project
- Boot-centric tests: configuration, Actuator, and a light web smoke
- Final Boot demystification and handoff to the next courses
395+
Lessons
700+
Tasks
79
Tests
And also:
- Instant validation
- AI code validator
- IDE plugin
- WebIDE
- Gamification