This repository contains an example Java-only application that enables AI-powered chat interactions with PDF documents. Upload and process PDF documents. Ask questions about the document.

• Apache Tika to parse the PDF
• Spring AI for call Local LLM or Open AI API
• Vaadin 24.6 Web UI in Java

Project was created from start.spring.io

• Java 21
• Maven

Clone the repository:

git clone https://github.com/samie/pdf-chat.git
cd pdf-chat

Before running you need OpenAI API key or local LLM service running.

Set either OPENAI_API_KEY or edit the LLM url in application.properties.

Build and run the project:

mvn spring-boot:run

or if you don't have Maven installed:

./mvnw spring-boot:run

Once running, access the application at:

[http://localhost:8080](http://localhost:8080)

This project is licensed under the Apache 2.0 License.

Special thanks to London Java User Group for the inspiration behind this project.