Spring Boot Security JWT Authentication Tutorial

In this tutorial, you will learn how to use JWT (JSON Web Token) authentication in a Spring Boot application using the latest version of Spring Security. We’ll cover creating a simple Spring Boot application, configuring Spring Security for JWT authentication, and securing a RESTful API.

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What is JWT Authentication?

JWT (JSON Web Token) is a compact, URL-safe means of representing claims to be transferred between two parties. It is often used for authentication and authorization in modern web applications. JWTs are stateless and can be verified without querying a database, making them efficient for distributed systems.

A JWT consists of three parts:

1. Header: Specifies the algorithm used to sign the token and the type of token.
2. Payload: Contains the claims, which are statements about an entity (typically, the user) and additional metadata.
3. Signature: Used to verify the authenticity of the token and ensure that the token has not been tampered with.

Prerequisites

Before we start, ensure you have the following:

• Java Development Kit (JDK) installed (JDK 17 or…