mui框架ajax提交请求时提示跨域问题，如何解决？

MLHttpRequest cannot load http://127.0.0.1:8083/index/api/test?appid=1&appkey=12121212121212. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8020' is therefore not allowed access." /yq-admin/index.html (0)