XMLHttpRequest cannot load–origin is not allowed by Access-control-allow-origin.

Error: Cross-domain

XMLHttpRequest cannot load http://localhost:8080/yxt-admin/admin/store. No ' Access-control-allow-origin ' header is present on the requested resource. Origin 'http://company.99kst.com:8088' is therefore not allowed access. On-line check out there are two solutions in the test when the other address to access, so when the session, the address changed to http://company.99kst.com:8088/.... (because I need to upload files to use) Solution: 1. Page request is a servelet, add Response.setheader ("Access-control-allow-origin", "*");
2. Request page HTML, add <meta http-equiv= "Access-control-allow-origin" content= "*" >

XMLHttpRequest cannot load–origin is not allowed by Access-control-allow-origin.