springboot websocket 访问路径出错,应该怎么修改

http://127.0.0.1:9895/demo/index 可以正常访问，

但是page访问不了,尝试了以下几种方式

http://127.0.0.1:9895/demo/templates/page.html
http://127.0.0.1:9895/demo/templates/page
http://127.0.0.1:9895/demo/page.html
http://127.0.0.1:9895/demo/page
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Tue Oct 19 11:33:20 CST 2021
There was an unexpected error (type=Not Found, status=404).

page页面你有吗？