Full-Stack Web Application

A comprehensive, production-ready full-stack web application built with Spring Boot 4.0 and Angular 21, featuring JWT authentication, role-based authorization, and a modern responsive UI.

🎯 Overview

This project demonstrates a complete modern web development stack with:

• Backend: Spring Boot REST API with JWT authentication and role-based access control
• Frontend: Angular web application with reactive forms and Tailwind CSS
• Database: JPA/Hibernate with H2 (development) or PostgreSQL (production)
• Security: BCrypt password hashing, JWT tokens, CORS, CSRF protection
• Testing: Unit tests with JUnit 5 and Mockito
• Styling: Tailwind CSS for utility-first responsive design

🚀 Quick Start

1. Start Backend

cd backend
mvn clean package -DskipTests
mvn spring-boot:run

Backend runs on: http://localhost:8080

2. Start Frontend

cd frontend
npm install
npm start

Frontend runs on: http://localhost:4200

3. Open Application

Navigate to: http://localhost:4200

📚 Documentation

• QUICK_START.md - Get up and running in 5 minutes
• SETUP_GUIDE.md - Comprehensive setup and testing guide
• IMPLEMENTATION_SUMMARY.md - Detailed architecture and implementation details
• PROJECT_CHECKLIST.md - Complete feature checklist and project status

📋 Features

Authentication & Security

✅ User registration with email validation ✅ JWT token-based authentication ✅ BCrypt password encryption ✅ Role-based access control (ADMIN, USER) ✅ Secure HTTP interceptors ✅ CORS configuration ✅ Stateless session management

API Features

✅ RESTful API design ✅ Input validation on backend ✅ Comprehensive error handling ✅ HTTP status code compliance ✅ Field-level validation messages ✅ Admin-only endpoints

Frontend Features

✅ Responsive design with Tailwind CSS ✅ Reactive forms with real-time validation ✅ Route guards and protection ✅ User dashboard with profile information ✅ Admin user management with CRUD operations ✅ Toast notifications for user feedback ✅ Modal dialogs for form input ✅ Sidebar navigation with role-based visibility

Admin Features

✅ User management (list, create, update, delete) ✅ User role assignment ✅ User status management ✅ Admin-only dashboard access

🛠️ Tech Stack

Backend

• Java 21
• Spring Boot 4.0.4
• Spring Security 7.0.4
• Spring Data JPA / Hibernate
• JJWT 0.12.3 (JWT library)
• H2 Database (development)
• Maven 3.9+

Frontend

• Angular 21.1
• TypeScript 5.9
• Tailwind CSS 4.1
• RxJS 7.8
• Angular Router
• Angular Forms

Testing

• JUnit 5
• Mockito
• Angular Testing Utilities

📁 Project Structure

Hamza/
├── backend/
│   ├── src/
│   │   ├── main/
│   │   │   ├── java/com/example/demo/
│   │   │   │   ├── config/          # Security & database config
│   │   │   │   ├── controller/      # REST endpoints
│   │   │   │   ├── dto/             # Data transfer objects
│   │   │   │   ├── entity/          # JPA entities
│   │   │   │   ├── exception/       # Exception handlers
│   │   │   │   ├── mapper/          # DTO mapping
│   │   │   │   ├── repository/      # Data access layer
│   │   │   │   ├── security/        # JWT & security filters
│   │   │   │   └── service/         # Business logic
│   │   │   └── resources/
│   │   │       └── application.properties
│   │   └── test/java/               # Unit tests
│   └── pom.xml                      # Maven configuration
│
├── frontend/
│   ├── src/
│   │   └── app/
│   │       ├── components/          # UI components
│   │       │   ├── auth/           # Login/Register
│   │       │   ├── admin/          # Admin pages
│   │       │   ├── dashboard/      # Dashboard
│   │       │   └── layout/         # Main layout
│   │       ├── guards/             # Route guards
│   │       ├── interceptors/       # HTTP interceptors
│   │       ├── services/           # Data services
│   │       ├── app.config.ts       # App configuration
│   │       ├── app.routes.ts       # Routing
│   │       └── app.ts              # Root component
│   ├── package.json                 # npm dependencies
│   ├── angular.json                 # Angular config
│   ├── tailwind.config.ts          # Tailwind config
│   └── postcss.config.js           # PostCSS config
│
├── QUICK_START.md                  # Quick start guide
├── SETUP_GUIDE.md                  # Detailed setup
├── IMPLEMENTATION_SUMMARY.md       # Architecture details
├── PROJECT_CHECKLIST.md            # Completion checklist
└── README.md                       # This file

🔐 Authentication Flow

1. Register: User creates account with email and password
2. Login: User provides credentials, receives JWT token
3. Token Storage: Token stored in browser localStorage
4. Request: AuthInterceptor adds token to all HTTP requests
5. Validation: Backend validates JWT on each request
6. Authorization: Role-based access control applied

🗄️ Database Schema

Users Table

Column	Type	Constraints
id	BIGINT	PK, AUTO_INCREMENT
email	VARCHAR(255)	UNIQUE, NOT NULL
password	VARCHAR(255)	NOT NULL
first_name	VARCHAR(255)	NOT NULL
last_name	VARCHAR(255)	NOT NULL
enabled	BOOLEAN	NOT NULL, DEFAULT true

Roles Table

Column	Type	Constraints
id	BIGINT	PK, AUTO_INCREMENT
name	VARCHAR(255)	UNIQUE, NOT NULL
description	VARCHAR(255)

User_Roles (Junction Table)

Column	Type	Constraints
user_id	BIGINT	FK, PK
role_id	BIGINT	FK, PK

🔌 API Endpoints

Authentication (Public)

POST   /api/auth/register     - Register new user
POST   /api/auth/login        - Login and get JWT
GET    /api/auth/validate     - Validate token

Users (Protected)

GET    /api/users/me          - Get current user profile
GET    /api/users             - Get all users (ADMIN)
GET    /api/users/{id}        - Get user by ID (ADMIN)
PUT    /api/users/{id}        - Update user (ADMIN)
DELETE /api/users/{id}        - Delete user (ADMIN)

🧪 Testing

Run Backend Tests

cd backend
mvn test

Test Coverage

• AuthService: Registration and login scenarios
• UserService: CRUD operations

🚀 Deployment

Production Checklist

• Change JWT secret in environment variables
• Switch database to PostgreSQL
• Enable HTTPS/SSL
• Configure allowed origins for CORS
• Set up logging and monitoring
• Configure rate limiting
• Implement backup strategy
• Set up CI/CD pipeline

Build for Production

# Backend
cd backend
mvn clean package

# Frontend
cd frontend
npm run build

🐛 Troubleshooting

Backend Issues

• Port 8080 in use: Change server.port in application.properties
• JWT errors: Verify app.jwt.secret is set in application.properties

Frontend Issues

• CORS errors: Backend must allow frontend origin (configured for localhost:4200)
• Blank page: Clear cache and localStorage, check console for errors
• API not found: Ensure backend is running on http://localhost:8080

See SETUP_GUIDE.md for detailed troubleshooting.

📊 Project Statistics

• Total Files: 50+
• Lines of Code: 5000+
• Backend Source Files: 22 Java files
• Frontend Components: 25+ TypeScript/HTML files
• Test Cases: 6 unit tests
• Documentation Files: 4 guides

🎓 Learning Resources

• Spring Boot Documentation
• Angular Documentation
• Tailwind CSS Documentation
• JWT Best Practices
• Spring Security Documentation

📝 Default Test Credentials

After setup, use these credentials to test:

Email: john@example.com
Password: password123

To test admin features, use SQL in H2 console to create admin user:

INSERT INTO users (email, password, first_name, last_name, enabled) 
VALUES ('admin@example.com', '$2a$10$K6eoHi8qW7v8Nuz9JcJ2.OqTq6r1KYhZKHDT0/1NwT2p/yDHWZsNm', 'Admin', 'User', true);

INSERT INTO user_roles (user_id, role_id) VALUES (2, 2);

✨ Key Features Highlights

Robust Backend

• Clean architecture with separation of concerns
• Comprehensive error handling
• Input validation at multiple layers
• Secure password handling
• RESTful API design

Modern Frontend

• Responsive design that works on all devices
• Real-time form validation
• Intuitive user interface
• Efficient state management
• Accessible HTML structure

Security First

• JWT token-based authentication
• Role-based access control
• Password encryption with BCrypt
• CORS protection
• Input validation

Developer Friendly

• Well-organized code structure
• Comprehensive documentation
• Unit tests for critical logic
• Clear error messages
• Easy to extend and customize

📞 Support

For detailed information:

1. Check the QUICK_START.md for quick setup
2. Read SETUP_GUIDE.md for comprehensive instructions
3. Review IMPLEMENTATION_SUMMARY.md for architecture details
4. Check PROJECT_CHECKLIST.md for what's implemented

📄 License

This project is provided as-is for educational and development purposes.

🎉 Getting Started

1. Read QUICK_START.md (5 minutes)
2. Read SETUP_GUIDE.md for detailed setup
3. Follow the instructions to start both backend and frontend
4. Open http://localhost:4200 and start using the application

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Status: ✅ Production Ready Last Updated: March 25, 2026 Version: 1.0.0

Happy Coding! 🚀