Product JWT API

A secure REST API for managing products with user registration, login and JWT-based authentication.

Features

• User registration and login
• JWT token authentication
• Role-based authorization (USER, ADMIN)
• Protected CRUD operations for products (only for ADMIN)
• PostgreSQL + Spring Boot + Spring Security
• Clean architecture with DTOs, services, and filters

Technologies

• Java 21
• Spring Boot 3.x
• Spring Security
• Spring Data JPA
• PostgreSQL
• JWT (JJWT library)
• Lombok

How to Run

1. Update your database settings in application.properties:

spring.datasource.url=jdbc:postgresql://localhost:5432/productdb
spring.datasource.username=youruser
spring.datasource.password=yourpass
spring.security.jwt.secret=your-jwt-secret-key

2. Run with:

./mvnw spring-boot:run

API Endpoints

Authentication

Method	Endpoint	Body	Description
POST	/api/auth/register	{ "username": "", "password": "" }	Register new user
POST	/api/auth/login	{ "username": "", "password": "" }	Login and get token

Include JWT in requests:

Authorization: Bearer <your-jwt-token>

Product (requires ADMIN role)

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

Sample JSON for products

{
  "name": "Laptop",
  "description": "High-end device",
  "price": 1499.99
}