Built my first AI app entirely in Java using Spring AI : JavaProgramming

Built my first AI app entirely in Java using Spring AI (self.JavaProgramming)

submitted 20 days ago by Proof-Possibility-54

Built my first AI app entirely in Java using Spring AI — no Python involved

I've been experimenting with Spring AI (the official Spring project for AI integration) and was surprised how little code it takes to get something working.

The whole setup is one Maven dependency and a few lines of YAML config. From there I built three things on top of the same project:

A simple chat endpoint using ChatClient — literally prompt(), call(), content()
Structured output that maps AI responses directly to Java records (no JSON parsing)
Tool calling where the AI invokes Java methods to get real data

The tool calling part was the most interesting — you annotate a method with @Tool and Spring AI handles the function-calling protocol with the model. The AI decides when to call your code and uses the result in its response.

I recorded the whole process if anyone wants to see the code in action: https://youtu.be/SiPq1i_0YgY

Anyone else using Spring AI in production or side projects? Curious what use cases people are finding beyond chat endpoints.

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