关于HIBERNATE的配置问题，很奇怪

Question

当我在hibernate.cfg.xml中加入<mapping resource="com/hibernate/news.hbm.xml">的时候，我的数据就插入不进去，而且提示错误：Caused by: org.hibernate.DuplicateMappingException: Duplicate class/entity mapping ，
但是当我把<mapping resource>删除的时候就可以插入数据了，但是我有个显示新闻列表的页面newsList.jsp,让他来显示数据库中的所有新闻，但是在地址栏里写的时候，就要提示：
前台：Cannot find bean newslist in any scope
后台：Not binding factory to JNDI, no JNDI name configured

Answer 1

hibernate.cgf.xml:<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"><!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>    <session-factory>
        <property name="connection.username">root</property>
        <property name="connection.url">jdbc:mysql://localhost:3306/lgrtvu</property>
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="myeclipse.connection.profile">hibernate</property>
        <property name="connection.password">121820</property>
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <mapping resource="lgrtvu/news/newsBusinessObject/NewsEntiety.hbm.xml"/>
    </session-factory>
    
</hibernate-configuration>NewsEntiety.hbm.xml:<?xml version="1.0" encoding="GBK"?>
<!DOCTYPE hibernate-mapping 
PUBLIC
      "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="lgrtvu.news.newsBusinessObject">
<class name="NewsEntiety"
table="news" lazy="false">
<id name="id" column="ID" type="long">
<generator class="increment"></generator>
</id>
<property name="title" type="string" column="TITLE" not-null="true">

</property> <property name="content" type="text" column="CONTENT" not-null="true">

</property>
<property name="inputtime" column="INPUTTIME" not-null="true" type="timestamp"></property>
</class>
</hibernate-mapping><!--comment-->Entitiety.javapackage lgrtvu.news.newsBusinessObject;import java.sql.Timestamp;
public class NewsEntiety {
    private long id;
private String title;
    private String content;
    private Timestamp inputtime;
    public NewsEntiety(){
    
    }
    public void setId(long id){
      this.id = id;
     }
     
     public long getId(){
      return id; 
      
     }
    
    public void setTitle(String title){
     this.title = title;
    }
    
    public String getTitle(){
     return title; 
     
    }
    
    public void setContent(String content){
     this.content = content;
    }
    
    public String getContent(){
     return content;
 }
    public void setInputtime(Timestamp inputtime){
      this.inputtime = inputtime;
     }
     
     public Timestamp getInputtime(){
      return inputtime;
  }
}

Answer 2

如果加上<mapping resource="">后台提示：- Mapping class: lgrtvu.news.newsBusinessObject.NewsEntiety -> news
org.hibernate.InvalidMappingException: Could not parse mapping document from resource lgrtvu/news/newsBusinessObject/NewsEntiety.hbm.xml
at org.hibernate.cfg.Configuration.addResource(Configuration.java:539)
at org.hibernate.cfg.Configuration.addClass(Configuration.java:586)
at lgrtvu.news.newsService.NewsStore.<clinit>(NewsStore.java:18)
at lgrtvu.news.newsAction.WriteNewsAction.execute(WriteNewsAction.java:22)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:448)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:263)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1176)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:472)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:595)
Caused by: org.hibernate.DuplicateMappingException: Duplicate class/entity mapping lgrtvu.news.newsBusinessObject.NewsEntiety
at org.hibernate.cfg.Mappings.addClass(Mappings.java:118)
at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:145)
at org.hibernate.cfg.Configuration.add(Configuration.java:669)
at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:504)
at org.hibernate.cfg.Configuration.addResource(Configuration.java:536)
... 33 more
- Unhandled Exception thrown: class java.lang.NullPointerException

Answer 3

还有Configured SessionFactory: null，为什么SessionFactory为空呢

Answer 4

可能是
C:\Program Files\Java\jdk1.6.0\jre\lib\ext
下包的问题