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🟢 04 - Basic Spring Boot Project Structure

Overview

A typical Spring Boot project follows a well-organized structure that helps separate concerns and organize code for maintainability and scalability.

📁 Project Folder Layout

springbootapplicationcourse/
├── src/
│   ├── main/
│   │   ├── java/
│   │   │   └── com/example/springbootapplicationcourse/
│   │   │       ├── controller/
│   │   │       ├── service/
│   │   │       ├── repository/
│   │   │       ├── model/
│   │   │       └── SpringbootapplicationcourseApplication.java
│   │   └── resources/
│   │       ├── application.properties
│   │       ├── static/
│   │       └── templates/
│   └── test/
│       └── java/
│           └── com/example/springbootapplicationcourse/
│               └── (test classes)
├── pom.xml

📂 Explanation of Key Folders and Files

  • controller/
    Contains REST controllers that handle HTTP requests and responses.

  • service/
    Holds business logic and application services.

  • repository/
    Interfaces responsible for data access, often extending Spring Data JPA repositories.

  • model/
    Domain entities and data transfer objects (DTOs).

  • SpringbootapplicationcourseApplication.java
    The main class with the main() method that starts the Spring Boot application.

  • resources/application.properties
    Configuration file for application settings like database, ports, logging, etc.

  • resources/static/
    Folder to serve static files (JS, CSS, images).

  • resources/templates/
    Template files (e.g., Thymeleaf or other view engines) if you build a web UI.

  • test/
    Contains test classes for unit and integration tests.