请问使用idea启动项目成功后访问http://localhost:8081/login出现404，在网上找了很多资料，都没有解决

[lovepli]

页面显示如下信息：
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.

Tue Jul 02 11:23:58 CST 2019
There was an unexpected error (type=Not Found, status=404).
No message available