🏦 Banking Management System (Spring Boot + MySQL)

This is a modular backend banking application built with Java, Spring Boot, Spring Data JPA, and MySQL, supporting core features like user registration, account management, transaction history, and loan processing. The system is structured using a layered architecture and exposes a RESTful API for all operations.

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📌 Features

• Create, update, delete, and search users
• Open and manage bank accounts
• Transfer funds between accounts with transaction logging
• Apply for and repay loans
• View transaction history with filters
• Field validations with DTOs and custom error messages
• RESTful API structure with clear endpoints

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🧱 Architecture

The application follows a layered architecture:

• Controller Layer – Exposes endpoints via @RestController
• Service Layer – Handles business logic, validations
• Repository Layer – Manages database access using Spring Data JPA
• DTOs – Used for input validation and response formatting
• Entities – Represent DB tables with JPA annotations
• Exception Handling – Global error handling with @ControllerAdvice

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🛠️ Tech Stack

• Java 17
• Spring Boot
• Spring Data JPA
• MySQL
• Maven
• Postman / Insomnia for API testing

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🚀 Run Locally

1. Clone the project:

git clone https://github.com/YeswanthVelugoti/Banking-Application.git
cd Banking-Application

2. Set up MySQL DB and update `application.properties`.

3. Run the application:
```bash
mvn spring-boot:run

4. Access the APIs using Postman or your browser.

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📂 Sample Endpoints

• POST /users – Create user
• GET /users – List users
• POST /accounts – Open bank account
• POST /transfer – Transfer funds
• POST /transactions – Add transaction
• POST /loans/apply – Apply for loan

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🔐 Validation & Error Handling

• DTOs with @NotNull, @Email, @Size, etc.
• Global exception handling using @ControllerAdvice
• Custom error messages for all validation failures

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✅ Future Enhancements

• JWT-based authentication and user roles
• Swagger/OpenAPI documentation
• Frontend client using Angular

👨‍💻 Author

Yeswanth Sai Kumar Velugoti
Email • LinkedIn