Spring Boot 3 GraphQL API

In this story, we’ll implement a sample CRUD GraphQL API that uses Spring Boot and Spring Data JPA with PostgreSQL.

· Prerequisites
· Overview
∘ What is GraphQL?
∘ Why GraphQL?
· Getting Started
∘ Data entities Model
∘ Repositories interfaces
∘ GraphQLSource
∘ GraphQL Controller
· Test the API
· Testing
· Conclusion
· References

Prerequisites

This is the list of all the prerequisites for following this story:

• Spring Boot 3+
• Maven 3.6.3
• Java 21
• PostgreSQL

Overview

What is GraphQL?

GraphQL is a query language for APIs and a runtime for fulfilling those queries with your existing data. GraphQL provides a complete and understandable description of the data in your API, gives clients the power to ask for exactly what they need and nothing more, makes it easier to evolve APIs over time, and enables powerful developer tools. — https://graphql.org/