解决 registered the JDBC driver [com.mysql.cj.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered./appears to have started a thread named [mysql-cj-abandoned-connection-cleanup] but has failed to stop it.
Springboot在tomcat Undeploying，或者容器中关闭时老是提示如下警告，虽然不会影响程序 […]