Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Fri Sep 06 21:41:26 CST 2019
There was an unexpected error (type=Not Found, status=404).
No message available
导致的原因就是主方法放的包，位置有问题，我百度很多都是没有用，搞了两天才想到位置问题
放到上级目录才是对的