网页端报错Access to XMLHttpRequest‘*‘from origin ‘*‘ has been blocked by CORS..Access-Control-Allow-Origi

网页端报错：

Access to XMLHttpRequest at '*' from origin '*' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
 

可能的原因是Tomcat被占用，Tomcat需要在MyEclipse中重新部署

来源地址：https://blog.csdn.net/qq_51553762/article/details/128302227