How can I implement JWT authentication in a Spring Boot application?

How can I implement JWT authentication in a Spring Boot application?

To implement JWT authentication in Spring Boot, you need to set up a security configuration, create a JWT utility class, and define authentication endpoints.

What dependencies do I need to add to my Maven or Gradle project?

You will need to add dependencies for Spring Security, JWT, and possibly Spring Web. For Maven, include 'spring-boot-starter-security' and 'jjwt'.

Can you provide a code example for generating a JWT?

Sure! Here's a simple example:

import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;

public String generateToken(String username) {
    return Jwts.builder()
            .setSubject(username)
            .setExpiration(new Date(System.currentTimeMillis() + 86400000))
            .signWith(SignatureAlgorithm.HS512, "your_secret_key")
            .compact();
}