Spring Boot FAQ: Top Questions

Spring Boot supports CORS configuration at both global and controller level using annotations or configuration classes.

📘 Methods:

• Using @CrossOrigin annotation: Apply directly on controller or method.
• Global config: Implement a WebMvcConfigurer bean.

📥 Example:

@CrossOrigin(origins = "http://localhost:3000")
@GetMapping("/data")
public List<Data> getData() { return dataList; }

🏆 Expected Output:

Allows requests from frontend on specified origin.

🛠️ Use Cases:

• Allowing frontend-backend interaction across domains.
• Enabling API usage from web clients in development.