Fix CORS Error in Spring Boot Projects (Frontend + Backend) : Full Stack Setup | Real-World Example

Fix CORS Error in Spring Boot: Full Stack Setup Using Two Separate Spring Boot Projects (Frontend + Backend)

In this hands-on tutorial, you'll learn how to reproduce and solve CORS errors in a real-world full-stack Java application using two separate Spring Boot projects — one as the REST API backend and the other as a frontend static site. We’ll simulate a real cross-origin scenario and fix the dreaded:

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Spring Boot CORS: Real-World Code Examples for Your Next Projecthow to fix CORS error in spring boot

Access to fetch at ... has been blocked by CORS policy

Whether you're building with React, Vue, Angular, or even just plain HTML, this guide helps you understand CORS deeply with working examples. Perfect for beginners and intermediate Java developers!

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How do I fix CORS error in Spring Boot?

What causes the CORS error in a Spring Boot API?

How to enable CORS for specific origins in Spring Boot?

Can I use @CrossOrigin in Spring Boot to solve CORS issues?

How to allow a frontend on a different port to access a Spring Boot API?

Why is my fetch request blocked by CORS in Java?

How to configure global CORS in Spring Boot?

How to serve HTML frontend from another Spring Boot app?

What's the best way to test CORS locally in Spring Boot?

Why does my JavaScript fetch fail to call Spring Boot backend?

What is Cross-Origin Resource Sharing (CORS) and how does it work?

How do I solve CORS for localhost in a Java full-stack app?

Can you use two Spring Boot apps as frontend and backend?

How to set CORS headers in Spring Boot?

How to call a Spring Boot REST API from HTML or JS?

How to debug CORS issues with Spring Boot and Chrome?

How do I simulate a CORS error in Spring Boot?

What’s the difference between @CrossOrigin and a CORS filter?

Why does React app get blocked calling Spring Boot?

Can Spring Boot serve a static frontend?

How to fix “No Access-Control-Allow-Origin header” in Spring Boot?

How to use CORS with Spring Security?

Why is Spring Boot not sending CORS headers?

How to test CORS errors using Postman or browser?

Does Spring Boot automatically handle CORS?

How to use WebMvcConfigurer to enable CORS?

How to fix 403 error due to CORS in Spring Boot?

What are the best practices for CORS in production with Spring?

Why is my frontend not calling backend even with CORS config?

What’s the simplest way to test cross-origin API calls?

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