👨‍💼 Employee Management System

🚀 A Robust Spring Boot REST API for Employee Management

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📖 About The Project

The Employee Management System is a backend application built using Spring Boot that helps organizations efficiently manage employee records through RESTful APIs.

The application supports complete employee lifecycle management, including creation, retrieval, updates, deletion, and advanced filtering. It also implements DTO-based architecture, data validation, and global exception handling to ensure clean, scalable, and production-ready code.

🎯 Key Learning Outcomes

• ✅ Building RESTful APIs using Spring Boot
• ✅ Layered Architecture (Controller → Service → Repository)
• ✅ DTO-Based Request & Response Handling
• ✅ MySQL Database Integration with Spring Data JPA
• ✅ Global Exception Handling using @ControllerAdvice
• ✅ Data Validation using Jakarta Bean Validation
• ✅ Clean Code & Best Practices

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✨ Features

👨‍💼 Employee Management

• ➕ Add New Employee
• 🔄 Update Existing Employee
• 🗑 Delete Employee
• 📋 Retrieve All Employees
• 🆔 Retrieve Employee by ID

🔍 Advanced Filtering

• 🏢 Filter Employees by Department
• 💼 Filter Employees by Job Title

⚡ Reliability & Validation

• ✅ Input Validation using Jakarta Bean Validation
• ⚠️ Global Exception Handling
• 📦 DTO-Based Data Transfer
• 💾 Persistent Storage with MySQL

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🛠 Tech Stack

Category	Technology
Language	Java 17
Framework	Spring Boot 3.x
Database	MySQL
ORM	Spring Data JPA
Validation	Jakarta Bean Validation
Exception Handling	ControllerAdvice & Custom Exceptions
Build Tool	Maven
API Style	RESTful APIs
Version Control	Git & GitHub

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📡 API Endpoints

Employee APIs

Method	Endpoint	Description
🟢 POST	/api/employee	Create a new employee
🔵 GET	/api/employee	Retrieve all employees
🔵 GET	/api/employee/{employeeId}	Retrieve employee by ID
🔵 GET	/api/employee/department/{department}	Retrieve employees by department
🔵 GET	/api/employee/jobtitle/{jobtitle}	Retrieve employees by job title
🟡 PATCH	/api/employees/{employeeId}	Update employee details
🔴 DELETE	/api/employee/{employeeId}	Delete employee

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🗄 Database Design

Employee Entity

Field	Type
employeeId	Long
firstName	String
lastName	String
email	String
phoneNumber	String
department	String
jobTitle	String
salary	Double
dateOfBirth	LocalDate
createdAt	LocalDateTime
updatedAt	LocalDateTime

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📂 Project Structure

employee-management-system/
│
├── src/main/java
│   ├── controller
│   ├── service
│   ├── repository
│   ├── entity
│   ├── dto
│   └── exception
│
├── src/main/resources
│   └── application.properties
│
├── pom.xml
└── README.md

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🚀 Getting Started

Clone Repository

git clone https://github.com/your-username/employee-management-system.git

Configure Database

spring.datasource.url=jdbc:mysql://localhost:3306/employeedb
spring.datasource.username=root
spring.datasource.password=your_password

spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true

Run Application

mvn spring-boot:run

Application starts on:

http://localhost:8080

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📸 API Screenshots

Add your screenshots here

![Add Employee](screenshots/add-employee.png)

![Get Employees](screenshots/get-employees.png)

![Database](screenshots/database.png)

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🌱 Future Enhancements

• 🔐 JWT Authentication & Authorization
• 📄 Pagination & Sorting
• 🔍 Search APIs
• 🐳 Docker Support
• ☁️ AWS Deployment
• 📊 Monitoring & Logging
• 📖 Swagger/OpenAPI Documentation

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👨‍💻 Author

Anjan Kumar

Java Backend Developer

💻 Passionate about Java, Spring Boot, REST APIs, SQL, and Backend Engineering.

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