报错

org.apache.ibatis.exceptions.PersistenceException:
Error updating database. Cause: java.sql.SQLNonTransientConnectionException: CLIENT_PLUGIN_AUTH is required
Cause: java.sql.SQLNonTransientConnectionException: CLIENT_PLUGIN_AUTH is required
at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:200)
at org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:185)
at com.cfl.dao.StudentDaoImpl.insertStu(StudentDaoImpl.java:27)

原因：

mysql-connector-java版本太高，降低版本即可。