GraphQL API Development with Spring Boot and Spring Data JPA

Traditional REST APIs often suffer from over-fetching and under-fetching data, limiting application performance and client flexibility. GraphQL solves this by allowing clients to request exactly the data they need, making your backend services highly efficient and adaptable. This text-based course guides you through the core concepts of GraphQL and shows you how to implement them from scratch using Java, Spring Boot, and Spring Data JPA. You will transition from understanding basic schema design to building fully functional, data-driven APIs connected to a MySQL database, all while adopting modern Spring GraphQL conventions. What you'll learn: - Understand the foundational differences and trade-offs between REST and GraphQL APIs - Design robust GraphQL schemas using types, queries, mutations, and inputs - Implement efficient data fetchers and controllers using modern Spring GraphQL annotations - Configure database connectivity and manage relationships with Spring Data JPA and MySQL - Apply modern Java features like Records and Project Lombok to write clean, boilerplate-free code - Optimize API performance by resolving the common N+1 query problem using BatchMapping The course begins with essential terminology, architectural concepts, and schema design before moving into step-by-step backend implementation, database integration, and performance tuning. This course is designed for Java developers who are new to GraphQL and want to build modern, flexible APIs using the Spring ecosystem. Start reading today to unlock the power of GraphQL in your Spring Boot applications.