早上好， 我正在尝试运行示例chat-jc（https://github.com/spring-projects/spring-security/tree/master/samples/chat-jc）。 在克隆git并将其作为Maven Project导入到STS之后，我尝试了部署但没有工作。错误如下：
...
GRAVE: Error during ServletContainerInitializer processing
javax.servlet.ServletException: Failed to instantiate WebApplicationInitializer class
at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:160)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5156)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1399)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
at org.springframework.web.context.AbstractContextLoaderInitializer.<init>(AbstractContextLoaderInitializer.java:42)
at org.springframework.web.servlet.support.AbstractDispatcherServletInitializer.<init>(AbstractDispatcherServletInitializer.java:56)
at org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer.<init>(AbstractAnnotationConfigDispatcherServletInitializer.java:39)
at sample.config.ChatApplicationInitializer.<init>(ChatApplicationInitializer.java:9)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:157)
... 8 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1305)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1157)
... 18 more
giu 11, 2015 1:31:37 PM org.apache.catalina.core.StandardContext startInternal
GRAVE: Context [/sample] startup failed due to previous errors
giu 11, 2015 1:31:37 PM org.apache.coyote.AbstractProtocol start
...
有人可以帮帮我吗？ 非常感谢