VIP会员
购物车
私信
发表新帖
立即签到
关注
回复
支持(
反对( 首页上一页 1 下一页尾页 3 条记录 1/1页
《java数据库系统开发案例精选》中销售管理系统
发表在Java图书答疑
2009-02-06
是否精华
是
否
版块置顶:
是
否
按照光盘说明作完这后，然后输入用户名和密码登陆出现这个提示，我是一个新手，请帮助解决，谢谢！
HTTP Status 500 -
--------------------------------------------------------------------------------
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
java.lang.NullPointerException
com.tool.JDBConnection.executeQuery(JDBConnection.java:57)
com.dao.ManagerDao.employeeCheck(ManagerDao.java:122)
com.webtier.ManagerServlet.checkManager(ManagerServlet.java:110)
com.webtier.ManagerServlet.doGet(ManagerServlet.java:34)
com.webtier.ManagerServlet.doPost(ManagerServlet.java:310)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.
HTTP Status 500 -
--------------------------------------------------------------------------------
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
java.lang.NullPointerException
com.tool.JDBConnection.executeQuery(JDBConnection.java:57)
com.dao.ManagerDao.employeeCheck(ManagerDao.java:122)
com.webtier.ManagerServlet.checkManager(ManagerServlet.java:110)
com.webtier.ManagerServlet.doGet(ManagerServlet.java:34)
com.webtier.ManagerServlet.doPost(ManagerServlet.java:310)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.
分享到：
