🌐📡 Employee Management System Spring Boot Rest-API

The Employee Management System using Spring Boot and REST API is a professional backend application designed to perform efficient CRUD operations—Create, Read, Update, and Delete—on employee data. It leverages Spring Data JPA for seamless database interaction and follows a clean, layered architecture with Controller, Service, and Repository components. This project demonstrates the practical implementation of RESTful web services, enabling robust, scalable, and maintainable backend development. Ideal for showcasing core Java and Spring Boot skills, it reflects real-world enterprise application standards.

🌱 What is Spring Boot REST API?

A Spring Boot REST API is a web service built using Spring Boot, a Java-based framework that simplifies the development of stand-alone, production-grade Spring applications. REST (Representational State Transfer) is a popular architectural style for building web services that communicate over HTTP using standard methods like GET, POST, PUT, and DELETE.

🚀 Spring Boot REST API Example

This project demonstrates a complete Spring Boot REST API using:

• Spring MVC
• Spring Boot 3
• Spring Data JPA
• Hibernate
• MySQL Database
• Maven
• Postman for API testing
• MVC architecture

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🧰 Technologies Used

Technology	Purpose
Spring Boot	Framework to quickly build RESTful APIs
Spring MVC	Handles HTTP requests via controllers
JPA (Java Persistence API)	ORM specification to interact with databases
Hibernate	Implementation of JPA
MySQL	Relational database used for data storage
Postman	API client for testing endpoints
REST API	Architectural style for building web services

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📸 Some Screenshots for the project:

• Spring Initializr for Create Spring Boot Project

• POST Employees Create new Employee

• GET Employees Retrieve Employee Information

• Retrieve Employees Data In SQL Database MySQL Workbench

• PUT Employees Update Employees details By employeeId

• GET Employees Retrieve Employee Information After Update

• Retrieve Employees Data After Update

• DELETE Epmloyee By employeeId

• GET Employees Retrieve Employee After Delete

• Retrieve Employees Data After Delete

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🌐 What is a REST API?

A REST API (Representational State Transfer) allows applications to communicate via HTTP using standard methods:

• GET → Retrieve data
• POST → Create new data
• PUT → Update existing data
• DELETE → Remove data

All data is exchanged in JSON format.

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🏗️ Project Architecture (MVC Pattern)

The application follows the Model-View-Controller (MVC) architecture:

• Model – Represents application data (e.g., User, Product)
• View – Not used directly; API returns JSON responses
• Controller – Handles incoming HTTP requests and routes them to the correct service
• Service – Contains the business logic
• Repository – Communicates with the database using JPA

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📂 Project Structure

    spring-boot-rest-api/
    ├── src/
    │   └── main/
    │       ├── java/
    │       │   └── com/
    │       │       └── example/
    │       │           └── demo/
    │       │               ├── controller/
    │       │               │   └── UserController.java        # Handles HTTP requests
    │       │               ├── service/
    │       │               │   └── UserService.java           # Business logic
    │       │               ├── repository/
    │       │               │   └── UserRepository.java        # JPA repository for DB access
    │       │               ├── model/
    │       │               │   └── User.java                  # JPA entity mapped to DB table
    │       │               └── DemoApplication.java           # Main class to bootstrap app
    │       └── resources/
    │           ├── application.properties                     # Configuration (DB, JPA, etc.)
    │           └── static/                                    # Static files (if any)
    │
    ├── pom.xml or build.gradle                                # Project dependencies and plugins
    └── README.md                                               # Project documentation

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⚙️ MySQL Configuration (application.properties)

Update the following in your application.properties:

• Database URL
• Username & Password
• Hibernate dialect
• DDL auto mode (e.g., update, create, validate)

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🧪 API Testing with Postman

Method	Endpoint	Description	Body (JSON)
GET	/api/users	Fetch all users	–
POST	/api/users	Create a new user	{ "name": "pratik", "email": "pratik@example.com" }
DELETE	/api/users/{id}	Delete a user by ID	–

Use Postman or cURL to interact with these endpoints after running the app.

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📖 Key Concepts

Term	Description
JPA	Java API for managing relational data via ORM
Hibernate	Popular implementation of JPA
Spring Boot	Framework for rapid application development
MySQL	Open-source relational database
REST	API style using HTTP methods for CRUD operations
MVC	Design pattern separating data, UI, and logic layers

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✅ How to Run

1. Clone the repository
2. Set up your MySQL database
3. Update the application.properties with DB credentials
4. Run the Spring Boot application
5. Test APIs via Postman

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📦 Future Enhancements

• Add Swagger for API documentation
• Integrate Spring Security for authentication
• Dockerize the application

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📞 Contact Information

🐙 GitHub: https://github.com/pratikkhot100

💼 LinkedIn: https://www.linkedin.com/in/pratikkhot01

📧 Email: pratikkhot1207@gmail.com