控制台打印的信息，最后几句话。提示可以去看tomcat的log
Connected to server
[-08-04 11:19:10,680] Artifact h5demo:Web exploded: Artifact is being deployed, please wait...
04-Aug- 11:19:10.858 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.
04-Aug- 11:19:10.865 严重 [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.core.StandardContext.startInternal One or more listeners failed to start. Full details will be found in the appropriate container log file
04-Aug- 11:19:10.866 严重 [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.core.StandardContext.startInternal Context [/h5demo_Web_exploded] startup failed due to previous errors
[-08-04 11:19:10,881] Artifact h5demo:Web exploded: Error during artifact deployment. See server log for details.
项目启动不了，又没有详细的报错信息，可以到tomcat下查看报错信息。比如说web.xml中引用的类不存在的问题：
我本机tomcat的logs 路径是 E:\tomcat\tomcat8.0.52\logs
查看的log
image.png
04-Aug- 11:19:10.860 严重 [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.core.StandardContext.listenerStart Error configuring application listener of class org.springframework.web.util.IntrospectorCleanupListener
java.lang.ClassNotFoundException: org.springframework.web.util.IntrospectorCleanupListener
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1352)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1180)
at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:542)
at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:523)
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:150)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4822)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5363)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:755)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:731)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)
at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1730)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
at
没找到org.springframework.web.util.IntrospectorCleanupListener这个类。确定是没有将maven中引用的jar包打包到输出目录！
所以需要在项目配置中将jar包先put into到工程下
image.png
重启即可
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