idea下搭建springmvc+mybatis框架，运行tomcat是出现的错误，请赐教！

[qq_41459471]

二月 07, 2018 4:56:01 下午 org.apache.catalina.core.StandardContext startInternal
严重: Error listenerStart
二月 07, 2018 4:56:01 下午 org.apache.catalina.core.StandardContext startInternal
严重: Context [] startup failed due to previous errors
二月 07, 2018 4:56:01 下午 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
严重: The web application [] registered the JDBC driver [com.mysql.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.
[2018-02-07 04:56:01,791] Artifact DemoFour:war exploded: Error during artifact deployment. See server log for details.
二月 07, 2018 4:56:09 下午 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory E:\tomcat\apache-tomcat-7.0.55\webapps\manager
二月 07, 2018 4:56:09 下午 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deployment of web application directory E:\tomcat\apache-tomcat-7.0.55\webapps\manager has finished in 72 ms