Access to XMLHttpRequest at 'http://localhost:8080/alert' from origin 'http://localhost:4200' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource code example
Example: from origin 'http://localhost:4200' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
@CrossOrigin(origins = "http://localhost:4200")
@GetMapping("/yourPath")