JWT Authentication with Spring Boot

This project demonstrates a simple JWT (JSON Web Token) authentication mechanism implemented using Spring Boot. The application allows users to register and log in, providing a secure token that can be used for subsequent requests.

Features

• User registration
• User login
• JWT generation for authenticated users
• Secure API endpoints

Prerequisites

• Java 17 or later
• Maven
• Spring Boot 3.x
• H2 Database (for development purposes)

Getting Started

1. Clone the Repository

Clone the repository to your local machine:

git clone https://github.com/abhishek621/springboot-jwt.git

cd springboot-jwt

2. Build the Application

mvn clean install

3. Configure application.properties

Ensure you have the following properties set in your src/main/resources/application.properties file:

spring.h2.console.enabled=true

spring.h2.console.name=testdb

spring.datasource.url=jdbc:h2:mem:testdb

spring.datasource.username=sa

spring.datasource.password=

spring.jpa.show-sql=true

spring.jpa.hibernate.ddl-auto=update

4. Run the Application

You can run the application using the following command:

mvn spring-boot:run

5. Access H2 Console (Optional)

http://localhost:8080/h2-console

6. ## API Endpoints

The application exposes API endpoints for user authentication

7. User Registration

To register a user, send a POST request to /auth/signup with the following JSON request body:

{
  "username": "user123",
  "password": "password",
  "email": "user@example.com"
}


A successful response will return the newly registered user's details:

{
  "id": 1,
  "username": "user123",
  "email": "user@example.com"
}

User Login : 
To log in a user, send a POST request to /auth/login with the following JSON request body:

{
  "username": "user123",
  "password": "password"
}

A successful login will return a JSON response containing the JWT token and its expiration time:

{
  "token": "your.jwt.token.here",
  "expiresIn": 3600
}