Spring Boot Project Workflow: Client to Database

The Spring Boot base structure for my Booking System project is now in place. Current progress includes: - project initialization - base package organization - initial application configuration - documentation-first setup The next step is implementing the core domain model with the main entities: - Booking Repository: https://lnkd.in/d8PVvEjz #Java #SpringBoot #Backend #SoftwareEngineering 

🚀 Understanding Spring Boot Project Structure A well-organized Spring Boot project follows a layered and modular architecture, making applications more scalable, maintainable, and testable. 🔹 Controller Handles HTTP requests and exposes REST APIs. It acts as the entry point of the application. 🔹 Service Contains business logic and core functionalities. It processes data between the controller and repository layers. 🔹 Repository Manages data access using JPA/CRUD operations and communicates directly with the database. 🔹 Model (Entity) Represents database tables as Java classes. Each model maps to a specific table. 🔹 DTO (Data Transfer Object) Used to transfer data between layers, ensuring separation between internal models and external APIs. 🔹 Configuration (Config) Defines application configurations such as beans, CORS, and other setup-related components. 🔹 Security Handles authentication and authorization (e.g., Spring Security, JWT). 🔹 Exception Handling Manages global errors and custom exceptions to ensure clean and consistent API responses. 💡 This layered architecture improves code readability, enforces separation of concerns, and makes your application easier to scale and maintain. #SpringBoot #Java #Backend #SoftwareArchitecture #CleanCode #Programming #Developer

🚀 Automatic API Documentation in Spring Boot using Swagger (OpenAPI) While developing REST APIs in Spring Boot, maintaining proper API documentation is important for both backend and frontend teams. Using Swagger (OpenAPI), we can generate interactive API documentation automatically. By adding the springdoc-openapi dependency, Swagger scans the existing Spring Boot REST controllers and generates the OpenAPI specification. Based on this specification, Swagger UI creates a visual interface to explore and test APIs directly from the browser. Key points: 🔹 Automatically scans controllers like @RestController, @GetMapping, @PostMapping 🔹 Generates API documentation based on the endpoints 🔹 Provides interactive Swagger UI to test APIs 🔹 Reduces manual documentation effort Example dependency used in Spring Boot: <dependency> <groupId>org.springdoc</groupId> <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId> <version>2.5.0</version> </dependency> Once the application is running, the documentation can be accessed at: 👉 http://localhost:8080/swagger-ui.html Tools like Swagger make API development easier by providing automatic documentation and interactive API testing. #SpringBoot #Swagger #OpenAPI #Java #BackendDevelopment #APIDocumentation

💡 Understanding APIs: The Backbone of Modern Applications APIs (Application Programming Interfaces) allow different software systems to communicate seamlessly. Whether it’s connecting a frontend to a backend, integrating third-party services, or automating workflows, APIs are everywhere. In my recent projects, I’ve been working on building and testing CRUD APIs using Java and Spring Boot, ensuring data accuracy, reliability, and scalability. Tools like Postman make it easy to validate endpoints and streamline backend development. Mastering APIs is essential for any developer who wants to build robust, maintainable, and high-performing applications. #API #Java #SpringBoot #BackendDevelopment #Postman #CRUD #Programming #DataManagement #CleanCode

🦀 #Java26 is here — and it’s already supported in IntelliJ IDEA from Day 1! The Java ecosystem continues to evolve fast, and this release brings: • Performance improvements • 10 JEPs shaping the future • New APIs for modern development • Preview features getting stronger What’s even better? Full support is already available in IntelliJ IDEA — making it easier for developers to experiment, migrate, and build faster without friction. Whether you're building microservices, scalable backends, or enterprise systems, staying updated with Java releases is no longer optional — it’s your edge. Explore the official details here: https://lnkd.in/dNXeGQaF Are you planning to try Java 26 yet? 👇

🚀 Built my first REST API using Spring Boot This week I implemented a basic REST API as part of my backend development journey. What I built: • CRUD operations (Create, Read, Update, Delete) • API endpoints using Spring Boot • Structured code using Controller, Service, Repository layers Tech used: • Java • Spring Boot • Spring Web Key learning: Understanding how backend systems handle client requests using HTTP methods (GET, POST, PUT, DELETE) was a big step forward. Next step: Connecting this API with a database. #SpringBoot #RESTAPI #Java #BackendDevelopment #Coding

Monday insight: Spring Boot 4.1.0-M3 advances testing annotations and observability, like smarter auto-config in backend pipelines for faster feedback loops. Milestone: https://lnkd.in/g5D8_9mS From framework familiarity, these ease monitoring and testing. Following the 4.1 milestones? What excites you? #SpringBoot #Java #Testing #Observability #TechMilestones

🧱 Why a Clean Service Layer Matters in Spring Boot In many codebases, business logic slowly leaks into controllers. I try to keep controllers thin and push real logic into service classes. Benefits I’ve seen: • Easier testing of business rules   • Better separation of concerns   • Cleaner API contracts Controllers should orchestrate.   Services should implement business logic. Simple structure, but it keeps backend systems maintainable as they grow. How do you structure your service layer? #springboot #backendengineering #java

Most developers use Spring Boot… but don’t understand how it actually works. Here’s a simple breakdown 👇 When you run a Spring Boot application: 1️⃣ SpringApplication.run() is triggered 2️⃣ It creates an Application Context 3️⃣ Auto-configuration kicks in 4️⃣ Beans are created & injected (IoC container) 5️⃣ Embedded server (Tomcat) starts 6️⃣ Your APIs are ready 🚀 💡 The magic is in Auto Configuration Spring Boot scans dependencies & configures things automatically. 👉 Example: Add spring-boot-starter-web → you get Tomcat + DispatcherServlet + MVC setup. ⚠️ Mistake developers make: Using Spring Boot without understanding what's happening under the hood. If you understand this flow → debugging becomes EASY. Follow me for backend engineering insights 🚀 #Java #SpringBoot #BackendDeveloper #Microservices

Topic of the day SpringBoot internal working? => How Spring Boot Works Internally? Ever wondered what actually happens behind the scenes when you run a Spring Boot application? Let’s break it down 👇 🔹 1. Entry Point – Main Class Everything starts with the main() method using SpringApplication.run(). This bootstraps the entire application. 🔹 2. Auto Configuration Magic Spring Boot uses @EnableAutoConfiguration to automatically configure beans based on: Dependencies in classpath Defined properties No need for heavy XML configs anymore 🔹 3. Component Scanning With @ComponentScan, Spring scans packages and registers: @Controller @Service @Repository @Component into the Spring Container (IoC Container) 🔹 4. Spring IoC Container This is the heart ❤️ of Spring Boot. It manages: Object creation Dependency Injection (DI) Bean lifecycle 🔹 5. Embedded Server Spring Boot comes with embedded servers like: Tomcat (default) Jetty / Undertow So no need to deploy WAR files separately — just run the JAR! 🔹 6. DispatcherServlet (Spring MVC Flow) All HTTP requests go through DispatcherServlet: ➡️ It routes request → Controller ➡️ Controller → Service → Repository ➡️ Response sent back to client 🔹 7. Application Properties Configuration is externalized using: application.properties / application.yml 🔹 8. Starter Dependencies Spring Boot provides "starter" dependencies (like spring-boot-starter-web) to reduce manual dependency management. 🔹 9. Spring Boot Actuator (Optional) Used for monitoring & managing the application: Health checks Metrics Application info 💡 In Short: Spring Boot simplifies development by combining: 👉 Auto Configuration 👉 Embedded Server 👉 Convention over Configuration 👉 Production-ready features #SpringBoot #Java #Microservices #BackendDevelopment #SoftwareEngineering #Developers #Coding #java #development #programming