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Adding AI capabilities to your Spring Boot application doesn’t require rebuilding from scratch. In this comprehensive guide, you’ll learn how to enhance an existing Spring Boot application with LLM-powered features using LangChain4j.
What You’ll Build
A customer support assistant that can:
Answer questions about your product using documentation (RAG)
Process natural language commands via tool calling
Maintain conversation context across requests
Step 1: Add Dependencies
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<dependencies><!-- LangChain4j with OpenAI --><dependency><groupId>dev.langchain4j</groupId><artifactId>langchain4j-open-ai-spring-boot-starter</artifactId><version>0.36.2</version></dependency><!-- For RAG with PgVector --><dependency><groupId>dev.langchain4j</groupId><artifactId>langchain4j-pgvector</artifactId><version>0.36.2</version></dependency></dependencies>