打印出如下问题XMLHttpRequest cannot load http://XXX.XXX.XXX/appv1.2/api/app/getChannelList. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:63342' is therefore not allowed access.请求服务器的接口,报这样的问题。大概知道是跨域请求问题 ,请问下怎么设置下,才可以请求成功呢???