https://github.com/pratikkhot100/employee-management-system-spring-boot-rest-api

The Employee Management System using Spring Boot and REST API handles CRUD operations on employee data. It follows a clean architecture with Spring Data JPA for efficient database interaction. This project showcases real-world backend development skills using Java and Spring Boot.
https://github.com/pratikkhot100/employee-management-system-spring-boot-rest-api

hibernate-jpa java jpa-persistence-applications maven mvc-architecture mysql-database postman-api spring spring-boot spring-boot-3 spring-data-jpa

Last synced: about 2 months ago
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The Employee Management System using Spring Boot and REST API handles CRUD operations on employee data. It follows a clean architecture with Spring Data JPA for efficient database interaction. This project showcases real-world backend development skills using Java and Spring Boot.

• Host: GitHub
• URL: https://github.com/pratikkhot100/employee-management-system-spring-boot-rest-api
• Owner: pratikkhot100
• Created: 2025-04-09T21:55:04.000Z (8 months ago)
• Default Branch: main
• Last Pushed: 2025-04-21T12:42:43.000Z (8 months ago)
• Last Synced: 2025-10-20T21:55:54.550Z (2 months ago)
• Topics: hibernate-jpa, java, jpa-persistence-applications, maven, mvc-architecture, mysql-database, postman-api, spring, spring-boot, spring-boot-3, spring-data-jpa
• Language: Java
• Homepage:
• Size: 65.4 KB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# 🌐📡 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**

---

## 🧰 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 |

---

## 📸 Some Screenshots for the project:

- Spring Initializr for Create Spring Boot Project

![Screenshot 2025-04-11 111403](https://github.com/user-attachments/assets/20109092-df84-46fd-a9fc-fdaf6a8c1581)

- POST Employees Create new Employee

  

![Screenshot 2025-04-11 143041](https://github.com/user-attachments/assets/ef3b6684-a1d8-4e51-b5be-251c843a80f5)

![Screenshot 2025-04-12 213324](https://github.com/user-attachments/assets/56221baa-6f22-44d8-bc54-0f478f49efea)

![Screenshot 2025-04-12 213522](https://github.com/user-attachments/assets/d6443aa0-1ae9-4126-bd14-1eecd6342c38)

- GET Employees Retrieve Employee Information

  

![Screenshot 2025-04-12 213600](https://github.com/user-attachments/assets/14960948-7b19-4a48-b371-c37b0e4aa293)

- Retrieve Employees Data In SQL Database MySQL Workbench

  

![Screenshot 2025-04-12 214035](https://github.com/user-attachments/assets/0280d322-8131-4af1-a667-5ed1ac9cccda)

- PUT Employees Update Employees details By employeeId

  

![Screenshot 2025-04-12 220548](https://github.com/user-attachments/assets/13a74e40-2736-4fe3-8986-0f488b65c681)

- GET Employees Retrieve Employee Information After Update

![Screenshot 2025-04-13 000209](https://github.com/user-attachments/assets/12cd5073-0197-43d3-a7ed-207cbb47e276)

- Retrieve Employees Data After Update

  

![Screenshot 2025-04-12 220636](https://github.com/user-attachments/assets/45c26ba0-180f-4854-9fcc-1cb0933e3fed)

- DELETE Epmloyee By employeeId

  

![Screenshot 2025-04-12 221712](https://github.com/user-attachments/assets/9a505a63-1e05-4167-ae9d-5c6c9878a241)

- GET Employees Retrieve Employee After Delete 

  

![Screenshot 2025-04-12 225652](https://github.com/user-attachments/assets/f0534110-d33b-434a-89be-8dcc2756aef9)

- Retrieve Employees Data After Delete

  

![Screenshot 2025-04-12 221733](https://github.com/user-attachments/assets/118930b3-199e-4672-b837-6dc9b0e5b7ee)

---

## 🌐 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.

---

## 🏗️ 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

---

### 📂 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

---

## ⚙️ 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`)

---

## 🧪 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.

---

## 📖 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 |

---

## ✅ 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

---

## 📦 Future Enhancements

- Add Swagger for API documentation

- Integrate Spring Security for authentication

- Dockerize the application

---

 ## 📞 Contact Information

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

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

  📧 Email: pratikkhot1207@gmail.com