Leave Management System

A Spring Boot application for managing employee leave requests, leave types, and user profiles, with role-based access for Admin and Employee.

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Table of Contents

• Features
• Technologies Used
• Project Structure
• Setup & Installation
• API Endpoints
• Future Improvements

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Features

• Employee
  • Apply, edit, and delete leave requests
  • View leave status (Pending, Approved, Rejected)
  • Update profile information
• Admin
  • Manage employees (Add, Update, Delete)
  • Manage leave types (Add, Edit, Delete)
  • Approve or reject leave requests
• Security
  • Role-based access with Spring Security
  • Admin-only and Employee-only endpoints
• Validation
  • Leave request status checks
  • Only pending leaves can be edited or deleted

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Technologies Used

• Backend: Java 17, Spring Boot
• Security: Spring Security
• Database: MySQL
• Build Tool: Maven
• IDE Support: IntelliJ IDEA

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Project Structure

LeaveManagementSystem/ │ ├─ src/main/java/com/example/LeaveManagementSystem/ │ ├─ Controller/ # REST controllers (AdminController, UserController) │ ├─ Entity/ # JPA entities and DTOs │ ├─ Repository/ # Spring Data JPA repositories │ ├─ Service/ # Business logic │ └─ LeaveManagementSystemApplication.java │ ├─ src/main/resources/ │ ├─ application.properties # Database & Spring configurations │ ├─ pom.xml # Maven build file └─ .gitignore

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Setup & Installation

1. Clone the repository

git clone https://github.com/<your-username>/LeaveManagementSystem.git
Import project into your IDE (IntelliJ / Eclipse / VS Code).

Configure database

Create a MySQL database

Update application.properties:

properties
Copy code
spring.datasource.url=jdbc:mysql://localhost:3306/leave_db
spring.datasource.username=root
spring.datasource.password=yourpassword
spring.jpa.hibernate.ddl-auto=update
Run the application

Run LeaveManagementSystemApplication.java

The backend will be available at http://localhost:8080/

API Endpoints
Admin
Endpoint	Method	Description
/admin/emp/EmpDetails	GET	List all employees
/admin/emp/AddEmp	POST	Add a new employee
/admin/emp/UpdateEmp	PUT	Update employee details
/admin/emp/DeleteEmp/{id}	DELETE	Delete an employee
/admin/leave/leaveTypes	GET	List all leave types
/admin/leave/AddLeaveType	POST	Add a new leave type
/admin/leave/EditLeaveType	PUT	Edit an existing leave type
/admin/leave/DeleteLeaveType/{id}	DELETE	Delete a leave type
/admin/leaveRequest/AllRequest	GET	View all leave requests
/admin/leaveRequest/approve/{id}	PUT	Approve a leave request
/admin/leaveRequest/reject/{id}	PUT	Reject a leave request

Employee
Endpoint	Method	Description
/employee/login	GET	Login page/message
/employee/updateProfile	POST	Update employee profile
/employee/applyLeave	POST	Apply for leave
/employee/viewExistLeave	GET	View own leave requests
/employee/editLeave/{id}	PUT	Edit own pending leave
/employee/deleteLeave/{id}	DELETE	Delete own pending leave

Future Improvements
Frontend integration (React / Angular / Vue)

JWT authentication for stateless security

Email notifications for leave approval/rejection

Reports for employee leave history

Unit & Integration tests for better QA