请大家帮忙看看这是什么异常？
org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
java.lang.NullPointerException
org.pan.web.login.excute(login.java:69)
org.apache.jsp.login_jsp._jspService(login_jsp.java:64)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.17 logs.
问题点数：20、回复次数：6Top
1 楼ruanjiantaotao（涛涛）回复于 2006-05-01 21:27:47 得分 0
楼主，你把代码贴出来看看吧Top
2 楼ymfhcn（这痞子真帅）回复于 2006-05-01 21:35:01 得分 0
excute(login.java:69)
空指针错误，第69行Top
3 楼hanpoyangtitan（韩波洋）回复于 2006-05-01 21:44:18 得分 0
应该是使用了没有定义的变量之类的。NullPointExceptionTop
4 楼TerrySJJ（花火）回复于 2006-05-10 17:43:34 得分 0
问题查明:具体问题是数据库驱动的字符串没有传到相应的程序块里Top
5 楼qczl1224（倾情一世『qczl.ys168.com』）回复于 2006-05-10 18:04:13 得分 0
org.apache.jsp.login_jsp._jspService(login_jsp.java:64)
贸个方法或对象为空 你还调用他的方法！就会NullPointExceptionTop
6 楼xiongbing528（多情剑客无情剑）回复于 2006-05-10 19:44:21 得分 20
try
{
}
catch(SQLException e)
{
while(e!=null)
{
out.print(e.getMessage());
out.print(e.getErrorCode());
out.print(e.getSQLState());
e=e.getNextException();
}
}
看看是什么信息...可以帮助你分析Top
