Getting request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource

Question

I am trying to send an Ajax request to a Tomcat server from my application, but I am getting this error (my web app is running on Chrome):

Response to

Answer 1

In case of Request to a REST Service:

You need to allow the CORS (cross origin sharing of resources) on the endpoint of your REST Service with Spring annotation:

@CrossOrigin(origins = "http://localhost:8080")

Very good tutorial: https://spring.io/guides/gs/rest-service-cors/