tomcat 报错ClassNotFoundException

2016-4-20 10:11:33 org.apache.catalina.core.ApplicationContext log
信息: Initializing Spring FrameworkServlet 'spring'
2016-4-20 10:11:39 org.apache.catalina.core.StandardContext listenerStart
严重: Error configuring application listener of class org.dspace.servicemanager.servlet.DSpaceKernelServletContextListener
java.lang.ClassNotFoundException: org.dspace.servicemanager.servlet.DSpaceKernelServletContextListener
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4179)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4739)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:803)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:780)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:583)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1080)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:1003)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:507)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1322)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:325)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1069)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:822)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1061)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
at org.apache.catalina.core.StandardService.start(StandardService.java:525)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:759)
at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
2016-4-20 10:11:39 org.apache.catalina.core.StandardContext listenerStart
严重: Error configuring application listener of class org.apache.commons.fileupload.servlet.FileCleanerCleanup
java.lang.ClassNotFoundException: org.apache.commons.fileupload.servlet.FileCleanerCleanup
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4179)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4739)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:803)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:780)
网上下载的一个开源项目 ，下来以后 maven ant都是成功的
而且 在web-inf/lib目录里面的jar包里面也确实有org.dspace.servicemanager.servlet.DSpaceKernelServletContextListener 这个类
求大神们解惑