servlet中RequestDispatcher.forward总是出现空指针异常
Jsan 2006-03-28 10:32:26 String userlevel = rs.getString("userlevel").trim();
String url = "";
dbc.close();//关闭数据库
if (userlevel.equals("0")){
url = "meeting_admin.jsp";
}
else if (userlevel.equals("1")){
url = "meeting_applied.jsp";
}
else if (userlevel.equals("2")){
url = "system_admin.jsp";
}
RequestDispatcher rd = request.getRequestDispatcher("meeting_admin.jsp");
rd.forward(request,response);
为什么我执行到rd.forward(request,response)这一步总是出现NullPointerException,其他的代码测试过都没问题.