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Create a Custom Spring Boot Starter | Step-by-Step Guide
Learn how to create a custom Spring Boot Starter from scratch. Build an auto-configurable library using @EnableAutoConfiguration, spring.factories, and @Conditional annotations.
🚀 Introduction to Spring Boot Starters
Spring Boot Starters are dependency bundles that help developers quickly add functionality to their projects without manual configurations.
Example:
✔ spring-boot-starter-web – Adds dependencies for building web applications.
✔ spring-boot-starter-data-jpa – Configures JPA and Hibernate automatically.
🔹 Why Create a Custom Spring Boot Starter?
✅ Modularity — Encapsulates reusable functionality into a single dependency.
✅ Scalability — Helps in large projects and microservices architectures.
✅ Simplifies Development — Reduces boilerplate code in multiple projects.
📌 In this guide, you’ll learn:
✅ How to create a custom Spring Boot Starter from scratch.
✅ How to implement Auto Configuration using spring.factories.
✅ How to register beans conditionally for better flexibility.
You can read this article for free on my blog: Create a Custom Spring Boot Starter | Step-by-Step Guide.
1️⃣ Step 1: Create a New Maven Project for the Custom Starter
First, create a new Maven project that will act as the custom Spring Boot Starter.
📌 Create a New Project Structure
custom-spring-boot-starter/
│── src/main/java/com/example/customstarter/
│ ├── config/
│ │ ├── CustomService.java
│ │ ├── CustomAutoConfiguration.java
│── src/main/resources/META-INF/
│ ├── spring.factories
│── pom.xml🚀 This structure ensures the starter can be used as a dependency in other projects.
2️⃣ Step 2: Define the CustomService Class
This is the core functionality provided by our starter.
