springboot 整合mybatis 问题

[Dream.cn]

Whitelabel Error Page

This application has no explicit mapping for /error, so you are seeing this as a fallback.
Fri Aug 31 09:37:59 GMT+08:00 2018
There was an unexpected error (type=Internal Server Error, status=500).
nested exception is org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLException: Access denied for user 'root '@'localhost' (using password: YES) ### The error may exist in file [D:\????? (4)\demo\target\classes\mapper\UserMapper.xml] ### The error may involve com.example.mapper.UserMapper.getNameById ### The error occurred while executing a query ### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLException: Access denied for user 'root '@'localhost' (using password: YES)

这是怎么回事？？？，， 已快崩溃，，

[k3rlt]

这个看起来是权限验证的问题，密码保证对吗？