Simple Banking System

A modern, full-stack simple banking web application built with Java, allowing users to seamlessly manage accounts and perform basic banking operations through a beautiful user interface.

✨ Features

• Pristine Web UI: A beautiful, modern Single-Page Application (SPA) utilizing a glassmorphism design system, dark mode, and sleek animations.
• REST API Backend: Powered by Javalin to expose banking services securely over HTTP.
• Account Management: Create and manage bank accounts with initial deposits and 4-digit PIN authentication.
• Banking Operations: Securely perform deposits, withdrawals, and balance inquiries.
• Transaction History: View a real-time table of past transactions, properly recording time and operation types.
• Data Persistence: Uses an embedded H2 Database for lightweight and reliable data storage.
• Localized Currency: All financial interactions use the Indian Rupee (₹).

🚀 Technologies Used

• Backend: Java 17, Javalin (REST API Framework)
• Frontend: Vanilla HTML5, CSS3 (Custom Variables, Flexbox/Grid), JavaScript (Fetch API for SPA interaction)
• Database: H2 Database (Lightweight, embedded relational database)
• Build Tool: Maven

📋 Prerequisites

• Java Development Kit (JDK) 17 or higher
• Maven 3.6.0 or higher

🛠 Setup and Installation

1. Clone the repository:

   git clone <repository-url>
   cd simple-banking-system

2. Build the project:

   mvn clean package

3. Run the application: Start the compiled executable JAR file:

   java -jar target/simple-banking-system-1.0-SNAPSHOT.jar

4. Access the Web Interface: Open your preferred web browser and navigate to: http://localhost:7070

📁 Project Structure

simple_banking_system/
├── src/
│   ├── main/
│   │   ├── java/com/banking/
│   │   │   ├── config/       # Database initialization
│   │   │   ├── controller/   # Javalin REST API Controller
│   │   │   ├── dao/          # Data Access Objects (H2 SQL queries)
│   │   │   ├── model/        # Data Models (Account, Transaction)
│   │   │   ├── service/      # Core Business Logic
│   │   │   └── Main.java     # Application Entry Point & Server Setup
│   │   └── resources/
│   │       ├── public/       # Static web assets (index.html, styles.css, app.js)
│   │       └── schema.sql    # Database table schemas
├── pom.xml                   # Maven dependencies & build configuration
└── README.md