java Hibernate 问题 急！！

来源：百度知道 编辑：UC知道 时间：2024/06/11 01:00:54
HTTP Status 500 -

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type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:372)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

java.lang.NullPointerException
com.sql.HibernateUtil.openSession(HibernateUtil.java:47)
org.apache.jsp.indexpage_jsp._jspService(indexpage_jsp.java:104)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.a

root cause

java.lang.NullPointerException
首先确定是空指针异常，
Repeated column in mapping for entity: com.formBean.TbStaff
把这个类的映射文件的每一列和你类的属性一 一对应下看看，是否重复了

实体映射文件中的配置跟表中的字段不一致吧，自己仔细检查一下！好象是ID不匹配吧