我是新安装的Eclipse，maven插件都已经安装好。导入maven项目报如下错误？
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.WebappClassLoader.loadClass(WebappClassLoader.java:1676)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521)
at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:415)
at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:397)
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:118)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4618)
at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5184)
at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5179)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
八月 30, 2017 2:11:56 下午 org.apache.catalina.core.StandardContext listenerStart
严重: Skipped installing application listeners due to previous error(s)
八月 30, 2017 2:11:56 下午 org.apache.catalina.core.StandardContext startInternal
严重: Error listenerStart
八月 30, 2017 2:11:56 下午 org.apache.catalina.core.StandardContext startInternal
严重: Context [/web] startup failed due to previous errors
八月 30, 2017 2:11:56 下午 org.apache.coyote.AbstractProtocolHandler start
信息: Starting ProtocolHandler ["http-bio-8081"]
八月 30, 2017 2:11:56 下午 org.apache.coyote.AbstractProtocolHandler start
信息: Starting ProtocolHandler ["ajp-bio-8009"]
八月 30, 2017 2:11:56 下午 org.apache.catalina.startup.Catalina start
信息: Server startup in 845 ms
