Complete Java & Spring Boot with Spring AI, RAG & AI Agents (Udemy.com)

This course takes you from writing your first Java program to building, securing and deploying production-style Spring Boot applications, and then adding real AI features with Spring AI. Everything is taught hands-on: you write the code alongside us, hit the same errors, and fix them the way you would on a real project.

What you will build and learn

• Java fundamentals and modern Java: OOP, exceptions, collections, lambdas, the Stream API, Optional, BigDecimal and the Date-Time API.

• Developer foundations: Git and GitHub, SQL with PostgreSQL, Maven builds and profiles, and JDBC with prepared statements and transactions.

• Backend and Spring Boot: HTTP and REST design, beans and dependency injection, REST controllers, DTOs, validation, the service layer and global exception handling.

• Spring Data JPA and Hibernate: entity mapping, relationships, pagination, projections, cascading, transactions and fixing N+1 queries.

• Spring Security: the filter chain, custom authentication, JWT access and refresh tokens, Google OAuth2 login, session limits, roles, permissions and method-level security.

• Microservices: Eureka service discovery, Spring Cloud Gateway, OpenFeign and Resilience4j retry, rate limiting and circuit breakers.

• Generative AI with Spring AI: how LLMs work, prompts and model controls, the OpenAI Java SDK, ChatClient, structured output, streaming and multimodal input.

• RAG, memory and advisors: embeddings, Qdrant vector search with tenant isolation, document ingestion, manual and advisor-based RAG, conversation memory and custom advisors.

• Tools, agents and MCP: safe tool calling with human approval, practical agents with observability and evaluation, and building and consuming MCP servers.

• Docker and deployment: Dockerfiles, Docker Compose, managed PostgreSQL, Spring profiles, AWS Elastic Beanstalk, GitHub Actions CI/CD and Flyway migrations.

How the course works

Each section builds on the previous one, and every section ends with a quiz so you can check your understanding before moving on. Lectures come with captions, and you can ask questions in the Q&A whenever you get stuck.

By the end, you will be able to design, build, secure and deploy a modern Java backend, and confidently add GenAI features such as RAG, memory, tool calling and agents to real Spring Boot applications.