运行tomcat后，访问主页显示404，求解
Javaspringmvc
10-Sep-2019 22:22:36.195 警告 [RMI TCP Connection(3)-127.0.0.1] org.apache.tomcat.util.descriptor.web.WebXml.setVersion Unknown version string [4.0]. Default version will be used.
10-Sep-2019 22:22:41.178 信息 [RMI TCP Connection(3)-127.0.0.1] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
10-Sep-2019 22:22:41.803 警告 [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.util.SessionIdGeneratorBase.createSecureRandom Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [406] milliseconds.
[2019-09-10 10:22:41,959] Artifact itheima_spring_mvc:war exploded: Artifact is deployed successfully
[2019-09-10 10:22:41,959] Artifact itheima_spring_mvc:war exploded: Deploy took 7,623 milliseconds
10-Sep-2019 22:22:44.084 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [D:\develop\apache-tomcat-8.5.31\webapps\manager]
10-Sep-2019 22:22:44.490 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [D:\develop\apache-tomcat-8.5.31\webapps\manager] has finished in [406] ms
