报错：跨域问题解决 No ‘Access-Control-Allow-Origin‘ header is present on the requested resource.
报错：Access to XMLHttpRequest at 'http://127.0.0.1:8088/user/list' from origin 'http://localhost:8080' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.xhr.js?b50d:178 GET http://127.0.0.1:80
