求助：好像是jdom有错了~
description The server encountered an internal error () that prevented it from fulfilling this request.

exception 

javax.servlet.ServletException: Servlet.init() for servlet CommonServlet threw exception
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
java.lang.Thread.run(Thread.java:619)


root cause 

java.lang.NoClassDefFoundError: org/jdom/Content
org.apache.commons.jxpath.ri.model.jdom.JDOMPointerFactory.createNodePointer(JDOMPointerFactory.java:45)
org.apache.commons.jxpath.ri.model.NodePointer.newNodePointer(NodePointer.java:81)
org.apache.commons.jxpath.ri.JXPathContextReferenceImpl.<init>(JXPathContextReferenceImpl.java:193)
org.apache.commons.jxpath.ri.JXPathContextReferenceImpl.<init>(JXPathContextReferenceImpl.java:167)
org.apache.commons.jxpath.ri.JXPathContextFactoryReferenceImpl.newContext(JXPathContextFactoryReferenceImpl.java:39)
org.apache.commons.jxpath.JXPathContext.newContext(JXPathContext.java:416)
ch07.servlet.CommonServlet.init(CommonServlet.java:55)
javax.servlet.GenericServlet.init(GenericServlet.java:212)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
java.lang.Thread.run(Thread.java:619)


root cause 

java.lang.ClassNotFoundException: org.jdom.Content
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1358)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204)
java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
org.apache.commons.jxpath.ri.model.jdom.JDOMPointerFactory.createNodePointer(JDOMPointerFactory.java:45)
org.apache.commons.jxpath.ri.model.NodePointer.newNodePointer(NodePointer.java:81)
org.apache.commons.jxpath.ri.JXPathContextReferenceImpl.<init>(JXPathContextReferenceImpl.java:193)
org.apache.commons.jxpath.ri.JXPathContextReferenceImpl.<init>(JXPathContextReferenceImpl.java:167)
org.apache.commons.jxpath.ri.JXPathContextFactoryReferenceImpl.newContext(JXPathContextFactoryReferenceImpl.java:39)
org.apache.commons.jxpath.JXPathContext.newContext(JXPathContext.java:416)
ch07.servlet.CommonServlet.init(CommonServlet.java:55)
javax.servlet.GenericServlet.init(GenericServlet.java:212)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
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