I Got Tired of Rebuilding JWT Authentication for Every Spring Boot Project

sbuilds — Thu, 11 Jun 2026 13:57:19 +0000

Every new Spring Boot project started the same way:

Configure Spring Security
Set up JWT Authentication
Handle CORS
Connect the frontend
Create login and registration APIs

None of these tasks are difficult individually, but together they can easily consume several hours before you build a single real feature.

After repeating this process multiple times, I decided to build my own Spring Boot + Angular starter kit with everything already configured.

One of the most important pieces was JWT Authentication.

Here's a simplified look at how it works.
What JWT Authentication Actually Does
Instead of storing user sessions on the server, JWT uses a token-based approach.

The flow looks like this:

User Login
↓
Server Verifies Credentials
↓
JWT Token Generated
↓
Client Stores Token
↓
Future Requests Send Token
↓
Server Validates Token
↓
Access Granted

This keeps the application stateless, scalable, and easy to integrate with frontend frameworks like Angular or React.

My Spring Security Configuration
One of the most important parts is configuring Spring Security to:

Allow login requests
Protect all other endpoints
Use JWT instead of sessions

@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {

    http
![ ](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/u50yhbyogsqaoxcay9vj.png)
![ ](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/cxlmujz4u2kych45a25d.png)
        .csrf(csrf -> csrf.disable())
        .sessionManagement(session ->
            session.sessionCreationPolicy(
                SessionCreationPolicy.STATELESS))
        .authorizeHttpRequests(auth -> auth
            .requestMatchers("/api/auth/**")
            .permitAll()
            .anyRequest()
            .authenticated());

    return http.build();
}

With this setup:

✅ Login endpoints remain public
✅ Protected APIs require authentication
✅ No server-side sessions are created

Why I Like JWT for Full Stack Projects

When building Angular + Spring Boot applications, JWT keeps authentication simple.

The frontend only needs to:

No session management.
No server-side storage.
No additional complexity.

What I Learned Building This
When I first started learning Spring Security, JWT felt intimidating because there were so many moving parts.

But once I understood that everything revolves around:
Creating a token
Sending a token
Validating a token
it became much easier.

The real challenge wasn't JWT.

The real challenge was rebuilding the same project setup over and over again.

That's Why I Built a Starter Kit

After building multiple projects, I realized I was spending more time on setup than on actual development.
So I packaged everything into a reusable starter kit that includes:

✅ Spring Boot 3
✅ Angular 19
✅ JWT Authentication
✅ Spring Security
✅ MySQL Integration
✅ CRUD Operations
✅ Frontend + Backend Integration
✅ Clean Project Structure

The goal is simple:
Start building features immediately instead of spending days configuring infrastructure.

GitHub
👉 https://github.com/shindebuilds/springboot-angular-starter-kit

Starter Kit
👉 https://hanumant4.gumroad.com/l/caopgu

I built a Spring Boot + Angular + JWT Full Stack Starter Kit — here's what I learned

sbuilds — Tue, 09 Jun 2026 18:13:53 +0000

Why I built this

Every time I started a new Java full stack project I was
spending 2-3 days just on setup — JWT configuration,
Spring Security, CORS, connecting Angular to backend.

So I decided to build a reusable starter kit once and
never do that setup again.

What I built

A complete full stack starter kit with:

Spring Boot 3.5 REST API
Angular 19 frontend connected to backend
MySQL database with User table ready
JWT Authentication working out of the box
Spring Security configured
Full CRUD operations
Clean layered architecture (Controller → Service → Repository)

The Tech Stack

Backend: Java 17, Spring Boot, Spring Security, JWT, JPA
Frontend: Angular 19, TypeScript
Database: MySQL

How it works

User registers via POST /api/users
User logs in via POST /api/auth/login
Backend returns JWT token
Frontend stores token in localStorage
All protected routes require valid token
Invalid or missing token returns 401 Unauthorized

What I learned

JWT configuration in Spring Security is confusing at first
CORS needs to be configured in SecurityConfig not just main class
Angular HttpClient needs provideHttpClient() in app.config.ts
Service layer keeps code clean and testable

GitHub

Full source code is available here:
https://github.com/shindebuilds/springboot-angular-starter-kit

Feel free to clone it, use it, improve it.

If you want the packaged version with setup instructions:
https://hanumant4.gumroad.com/l/caopgu

Happy building!

DEV Community: sbuilds