I've read probably forty Spring Boot JWT tutorials over the years. They all show you the same thing: how to generate a token on login, how to validate it on each request, and how to wire up SecurityFilterChain . And they all stop right there.

What they skip is everything that matters in production: refresh token rotation, token revocation, and not sending tokens in JavaScript-readable headers when you don't have to. I've inherited two codebases where a "working JWT implementation" turned out to be a security hole you could drive a truck through. This article is the setup I now use by default.

What the typical tutorial gives you

The standard walkthrough produces something like this:

@Bean public SecurityFilterChain filterChain ( HttpSecurity http ) throws Exception { http . csrf ( AbstractHttpConfigurer: : disable ) . sessionManagement ( s -> s . sessionCreationPolicy ( SessionCreationPolicy . STATELESS )) . authorizeHttpRequests ( auth -> auth . requestMatchers ( "/auth/**" ). permitAll () .…