📚 Main Topics

1. Introduction to Spring Framework

   • Overview of Spring Boot and web project creation.
   • Basics of request mapping in Spring.

2. Handling Requests

   • Mapping requests for homepage, about page, and login.
   • Sending data from server to client.

3. Returning Data Formats

   • Importance of returning structured data (e.g., JSON) instead of plain text.
   • Use cases for returning entity data (e.g., products in an e-commerce application).

4. Creating a Product Controller

   • Setting up a controller to handle product requests.
   • Returning dummy data instead of database data for initial testing.

5. Using Lombok for Simplified Code

   • Introduction to Lombok for reducing boilerplate code in Java.
   • Adding Lombok dependency in the project.

6. Service Layer Implementation

   • Importance of separating business logic from controllers.
   • Creating a service layer to handle product data retrieval.

7. MVC Architecture

   • Explanation of Model-View-Controller (MVC) pattern.
   • Organizing code into controller, service, and model packages.

8. Debugging and Testing

   • Common issues encountered (e.g., port conflicts, Lombok issues).
   • Restarting the system as a troubleshooting step.
   • Testing the API using a web browser.

✨ Key Takeaways

• Request MappingUnderstanding how to map requests to specific endpoints is crucial for web applications.
• Data FormatsJSON is the preferred format for sending structured data between server and client.
• Separation of ConcernsImplementing a service layer helps maintain clean code and separates business logic from request handling.
• LombokUtilizing Lombok can significantly reduce boilerplate code, making the codebase cleaner and easier to manage.
• DebuggingRestarting the IDE or system can resolve many common issues encountered during development.

🧠 Lessons Learned

• Always structure your application following the MVC pattern to enhance maintainability.
• Use tools like Postman for testing APIs effectively.
• When facing issues, systematic debugging and restarting can often resolve unexpected problems.
• Familiarize yourself with libraries like Lombok to streamline your Java development process.