Building a Full Stack User Authentication System using React, Spring Boot, and PostgreSQL

Introduction In this blog, I will walk through how I built a full-stack User Authentication System using React for the frontend, Spring Boot for the backend, and PostgreSQL for the database. This project demonstrates a complete flow of user registration, login, and dashboard display, along with validation and login activity tracking. Tech Stack Frontend React React Router Axios CSS Backend Java Spring Boot Spring Data JPA Database PostgreSQL Features User Registration User Login Authentication Dashboard with User Details Client-side Form Validation REST API Integration Login Activity Tracking (Status and Timestamp) Application Flow User registers with username, password, name, and email Data is sent to Spring Boot backend and stored in PostgreSQL User logs in with credentials Backend validates user and records login attempt On success, frontend fetches user details Dashboard displays user information Frontend Implementation (React) Form Handling I used React’s useState hook to manage f