Building an AI Chatbot with Spring Boot and the OpenAI API (2026 Guide)

This is a summary of the full tutorial published on howtostartprogramming.in.

TL;DR Aspect Details Tech Stack Java 17, Spring Boot 3.2 OpenAI GPT‑4o (2026 release) via openai-java SDK 2.3 Gradle 8, Lombok, MapStruct Docker 27, Kubernetes (optional) PostgreSQL 16 (for conversation history) Thymeleaf (Web UI) or React (SPA) – choose one Architecture +-------------------+ +-------------------+ +-------------------+ | Front‑end (UI) | | Spring Boot API | | OpenAI GPT‑4o | | (Thymeleaf/React) | | (REST + Service)| | (cloud) | +-------------------+ +-------------------+ +-------------------+ | | v v +-------------------+ +-------------------+ | PostgreSQL (history) | | Redis (cache) | +-------------------+ +-------------------+ Key layers: Controller : Handles /api/chat endpoint. Service : Calls OpenAiClient , manages token limits, retries. Repository : Persists Conversat

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🔗 Building AI chatbot with Spring Boot and OpenAI API 2026 — Full Guide with Code Examples

The full article includes:

• ✅ Step-by-step code examples (copy-paste ready)
• ✅ Complete working project (Spring Boot / Java)
• ✅ Common mistakes + fixes
• ✅ Production tips and benchmarks
• ✅ FAQ section

Published on How to Start Programming — practical AI and Java tutorials for developers.