Maven项目报错：java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener

Maven项目的启动出现了下面的错误信息:

严重: Error configuring application listener of class org.springframework.web.context.ContextLoaderListener
java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1856)
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1705)
	at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:506)
	at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:488)
	at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:115)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4993)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5591)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1574)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1564)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

三月 27, 2019 10:18:55 上午 org.apache.catalina.core.StandardContext listenerStart
严重: 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:1856)
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1705)
	at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:506)
	at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:488)

错误原因：

进入到tomcat的部署路径下，发现工程部署后在WEB-INF文件夹下没有生成lib目录，正常情况下，会生成lib目录并把工程的所有依赖jar包都部署到该目录下。

解决方法：

1.右键点击项目--选择Properties

选择Deployment Assembly,在右边点击Add按钮，在弹出的窗口中选择Java Build Path Entries