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Java Spring Boot Master Bootcamp

☕ Java Spring Boot Master Bootcamp

Welcome to the comprehensive guide to mastering Java and Spring Boot. We move from the core mechanics of the JVM to the complex orchestration of microservices.

🏗️ The 8-Milestone Architectural Roadmap

Milestone 1: Java Foundations & JVM

  • Engine: The JVM, Bytecode, and Memory Management.
  • Modern Java: Streams, Lambdas, and Records.
  • Goal: Master the language before the framework.

Milestone 2: Spring Core & Dependency Injection

  • Magic: Inversion of Control (IoC) and Bean Lifecycle.
  • Config: Profiles, Properties, and Spring Boot Auto-configuration.
  • Goal: Understand how Spring “wires” your application together.

Milestone 3: Data Persistence (Spring Data JPA)

  • ORM: Hibernate, JPA, and Repository patterns.
  • Database: Migrations with Flyway/Liquibase.
  • Goal: Build a robust, transactional data layer.

Milestone 4: Web Services (Spring Web)

  • REST: Controllers, Request Mapping, and Error Handling.
  • Docs: Swagger/OpenAPI integration.
  • Goal: Build secure and well-documented APIs.

Milestone 5: The Vault (Spring Security)

  • Security: JWT, OAuth2, and Filter Chains.
  • Auth: Role-Based Access Control (RBAC).
  • Goal: Protect your system from modern threats.

Milestone 6: Testing & Quality

  • Tests: JUnit 5, Mockito, and Testcontainers.
  • Clean Code: SOLID, Design Patterns, and ArchUnit.
  • Goal: Ensure your code is production-ready and maintainable.

Milestone 7: Distributed Systems (Microservices)

  • Cloud: Spring Cloud, Service Discovery (Eureka), and Config Server.
  • Resilience: Circuit Breakers (Resilience4j) and API Gateways.
  • Goal: Orchestrate complex, multi-service systems.

Milestone 8: Cloud Native & Production

  • DevOps: Docker, Kubernetes, and Helm.
  • Observability: Actuator, Prometheus, and Grafana.
  • Goal: Own the entire lifecycle from commit to cloud.

🛠️ The Professional Setup

To start your Java journey, ensure you have the right tools.

# 1. Install SDKMAN! (Easy way to manage Java versions)
curl -s "https://get.sdkman.io" | bash

# 2. Install the latest LTS Java (e.g., Java 21)
sdk install java 21.0.2-tem

# 3. Check your version
java -version

# 4. Use 'Spring Initializr' to scaffold your projects
# Visit: https://start.spring.io/