Spring Boot Tutorial

1. Spring Boot Introduction

Auto-configuration, starters, the embedded server, and what @SpringBootApplication actually composes.

2. Building a REST API

A complete @RestController CRUD example with @RequestBody, @PathVariable, @RequestParam and ResponseEntity status codes.

3. Configuration & Actuator

application.yml structure, externalized config and profiles, and Actuator health checks and metrics in production.

4. Testing Spring Boot Apps

@WebMvcTest vs @DataJpaTest vs full @SpringBootTest, with a complete working example of each.

5. Production Deployment & Actuator Deep Dive

Packaging as a layered fat JAR, Actuator endpoints beyond health checks, and securing Actuator in production.

6. Spring Boot with Docker

A real multi-stage Dockerfile using layered JARs for efficient Docker layer caching.

7. Spring Boot Interview Questions

Commonly asked Spring Boot interview questions with clear, practical answers.