急求hibernateError reading resource错误

都几天了,这个问题还没解决.
烦躁的不是出现错误,而是出现很太奇怪的错误.
下面是错误:
javax.servlet.ServletException: Error reading resource: com/lianxi/pojo/Dept.hbm.xml
org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:535)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:433)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause org.hibernate.MappingException: Error reading resource: com/lianxi/pojo/Dept.hbm.xml
org.hibernate.cfg.Configuration.addResource(Configuration.java:452)
org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1263)
org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1235)
org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1217)
org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1184)
org.hibernate.cfg.Configuration.configure(Configuration.java:1112)
org.hibernate.cfg.Configuration.configure(Configuration.java:1098)
com.lianxi.factory.DefaultSessionFactory.getSession(DefaultSessionFactory.java:9)
com.lianxi.imp.DeptDaoImp.<init>(DeptDaoImp.java:21)
com.lianxi.factory.DaoFactory.getDeptDaoInstance(DaoFactory.java:15)
com.lianxi.struts.action.DeptAction.selectAll(DeptAction.java:63)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:585)
org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270)
org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause 
我在测试类中运行
public List queryAll() throws Exception {
// TODO Auto-generated method stub
List all=null;
String hql="from Dept";
Query q=session.createQuery(hql);
all=q.list();
this.session.close();
return all;
}
这个方法没点问题,能过行查询.
但发布到TOMCAT中在JSP中调用这个方法就出错了.我测试过连SessioFactory都创建不了.请帮忙认真看一下.