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Building a custom Spring Boot Starter: From theory to practice
A Comprehensive guide to creating reusable functionality in Spring Boot 3 applications

Introduction
Spring Boot starters are key feature of the Spring Boot ecosystem. They simplify dependency management and auto — configuration. A starter mix of dependencies and auto — configuration.It provides specific features with little setup needed. Spring Boot offers many official starters. However, you may need to create a custom starter for reusable functionality across different projects.
In this guide, we’ll look at the theory and practice fo building a custom Spring Boot starter. We’ll learn how to start working under the hood and create a real — world example that you can use as template for you own custom starter.
Understanding Spring Boot starter
What is a Spring Boot starter?
A Spring Boot starter is a special type of module that serves two primary purposes:
- Provide a curated set of dependencies that integrate smoothly with one another.
- Offers auto — configuration capabilities to enable specific functionaility with minimal configuration.