问题描述：

Whitelabel Error Page

This application has no explicit mapping for /error, so you are seeing this as a fallback.

Tue Aug 20 15:30:12 CST 2019 There was an unexpected error (type=Internal Server Error, status=500). Invalid bound statement (not found): com.example.mapper.UserMapper.getAllUser   解决方法：

之前的错误地址改正确即可