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UP!!!我是新手，想请教您一个问题在初始化hibernate.cfg.xml的时候用以下方法出现错误，是什么回事啊？public HebernateDept() {
    
    try {
      Configuration config=new Configuration().configure();//********调用该方法时出错！！！！！
     // SessionFactory sessionFactory = config.buildSessionFactory();
     // session=sessionFactory.openSession();
    }
    catch (HibernateException ex) {
      ex.printStackTrace();
    }
  }
java.lang.NoClassDefFoundError: org/dom4j/Attribute
 at org.form.HebernateDept.(HebernateDept.java:25)
 at org.form.AddDeptAction.execute(AddDeptAction.java:24)
 at org.apache.struts.action.RequestProcessor.processActionPerform
(RequestProcessor.java:484)
 at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
 at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
 at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
 at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
 at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)