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Spring Boot Architecture: Controller, Service, Repository, Database & Architecture Flow
Learn the layered architecture of Spring Boot, including Controller, Service, Repository, Model, and Database layers. Understand how data flows in a Spring Boot application with an easy-to-follow diagram.
🚀 Introduction to Spring Boot Architecture
Spring Boot is one of the most popular frameworks for building RESTful APIs and microservices in Java. It simplifies development by providing an opinionated, pre-configured environment, reducing boilerplate code, and ensuring scalability and maintainability.
For non-members, read this article for free on my blog: Spring Boot Architecture: Controller, Service, Repository, Database & Architecture Flow.
📌 Why Learn Spring Boot Architecture?
✅ Better Code Organization — Follow a well-defined structure.
✅ Scalability — Makes it easy to expand the application.
✅ Maintainability — Each layer has a clear responsibility.
✅ Faster Development — Simplifies API and database interactions.
In this guide, we’ll explore the Spring Boot Layered Architecture and how data flows between different components.
🔹 Spring Boot Layered Architecture (Explained with Diagram)
The Spring Boot architecture is based on a layered approach, where each layer is responsible for a specific part of the application.
🖼️ Spring Boot Architecture Diagram
1️⃣ Client Layer (API Consumer)
📌 This is the external entity (browser, mobile app, Postman, frontend app) that interacts with the API.
- Sends HTTP Requests (GET, POST, PUT, DELETE)
- Receives API Responses (JSON format)
Examples of clients:
✔ Frontend apps (React, Angular, Vue.js)
✔ Mobile apps (Android, iOS)
✔ API testing tools (Postman, cURL)
