Spring Boot Basics API

A simple Spring Boot project demonstrating basic REST API endpoints using @RestController, @RequestParam and CRUD operations.

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Features

This project includes simple examples for learning Spring Boot fundamentals:

• /sum → Add two numbers
• /info → Return a simple JSON object
• /greet → Greeting with RequestParam
• /upper → Convert text to uppercase
• /random → Random number (1–100)

Perfect for beginners learning Spring Boot REST APIs.

Update

1. Migrated Storage From HashMap to Course Object

Refactored the previous implementation that used a HashMap<Integer, Course> and migrated it into a proper Course object list, following clean OOP design.

2. Refactored All CRUD APIs

• Updated Create, GetAll, GetById, Update, and Delete methods.
• Improved response handling with ResponseEntity.
• Added createdDate, updatedDate, and isActive fields.

How to Download & Run the Application

Follow the steps below to set up and run this Spring Boot application locally with MySQL.

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1. Clone the Repository

git clone https://github.com/Hjufaili/SpringBoot.git
cd SpringBoot

2. Build the Project

mvn clean install

3. Configure MySQL Database

CREATE DATABASE courseDBDataBase;

4. Update application.properties

src/main/resources/application.properties

Replace YOUR_USERNAME and YOUR_PASSWORD with your real MySQL credentials

5. Run the Application

Option A — Run with Maven

mvn spring-boot:run

Option B — Run the JAR file

java -jar target/demo-0.0.1-SNAPSHOT.jar