报错
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
There was an unexpected error (type=Not Found, status=404).
但是我的Apllication启动类和controller类并没有放错位置。代码也没问题，依赖也都有。搞不懂为什么会报错

路由问题