Expense Tracker REST API

A RESTful API for tracking personal expenses built with Spring Boot and Spring Data JPA.

Features

• Create, read, update, and delete expenses
• Track expense amount, category, description, and date
• RESTful API with proper HTTP methods and status codes
• Three-layer architecture (Controller, Service, Repository)
• JPA/Hibernate for database operations

Technologies

• Java 25
• Spring Boot 3.x
• Spring Data JPA
• H2 Database
• Maven
• Lombok

API Endpoints

Method	Endpoint	Description
GET	/api/expenses	Get all expenses
GET	/api/expenses/{id}	Get expense by ID
POST	/api/expenses	Create new expense
PUT	/api/expenses/{id}	Update expense
DELETE	/api/expenses/{id}	Delete expense

Getting Started

Prerequisites

• Java 17+
• Maven

Run the Application

# Clone the repository
git clone https://github.com/YOUR-USERNAME/expense-tracker-api.git
cd expense-tracker-api

# Run with Maven
mvn spring-boot:run

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

Example Usage

Create an Expense (POST)

{
  "amount": 50.00,
  "category": "Food",
  "description": "Lunch",
  "date": "2025-11-03"
}

Response

{
  "id": 1,
  "amount": 50.0,
  "category": "Food",
  "description": "Lunch",
  "date": "2025-11-03"
}

Project Structure

src/main/java/com/example/expense_tracker/
├── controller/      # REST API endpoints
├── service/         # Business logic
├── repository/      # Database access
└── model/          # Entity classes

Future Enhancements

• User authentication (JWT)
• Expense filtering by date range
• Statistics and analytics
• Budget tracking
• Frontend integration

Author

[Teerth Patel]

License

MIT License