LangChain4j and Spring AI Bring LLM Integration to Java Developers

LangChain4j and Spring AI are production-ready Java libraries that let developers integrate LLMs into Spring Boot apps without a Python sidecar. Spring AI 2.0, released in June, offers auto-configuration and dependency injection for tasks like conversation history, document chunking, and function calling. The article walks through building a service that answers questions from internal docs and triggers APIs, assuming Java and Spring Boot knowledge but no AI background.