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Java项目开发实例自学手册中销售管理系统有问题
发表在Java图书答疑
2010-03-29
是否精华
是
否
版块置顶:
是
否
可以打首页可是却打不开接下来的，错误提示是！
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:58)
com.dao.ManagerDao.employeeCheck(ManagerDao.java:130)
com.webtier.ManagerServlet.checkManager(ManagerServlet.java:109)
com.webtier.ManagerServlet.doGet(ManagerServlet.java:34)
com.webtier.ManagerServlet.doPost(ManagerServlet.java:309)
javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.25 logs.
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:58)
com.dao.ManagerDao.employeeCheck(ManagerDao.java:130)
com.webtier.ManagerServlet.checkManager(ManagerServlet.java:109)
com.webtier.ManagerServlet.doGet(ManagerServlet.java:34)
com.webtier.ManagerServlet.doPost(ManagerServlet.java:309)
javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.25 logs.
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