帮忙看看什么原因

[redappleji]

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.handleJspException(JspServletWrapper.java:512)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:395)
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.apache.jsp.administrators.admin_005flogin_jsp._jspService(admin_005flogin_jsp.java:104)
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:334)
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/5.5.20 logs.


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Apache Tomcat/5.5.20

[meteorlg]

在jsp页面中你使用的某个对象为Null

[redappleji]

能具体的说一下是哪个对象吗

[meteorlg]

你把代码贴出来

[jackie_604898140]

贴代码，

[redappleji]

<%@ page contentType="text/html;charset=gb2312"%>
<%@ page language="java" import="java.sql.*,java.util.*,java.text.*" %>
<%@ page import="MyPackage.*"%>
<jsp:useBean id="conn" class="MyPackage.ConnData" scope="page"/>

<script language="javascript">
function tijiao()
{
var l;
n = document.form1.name.value;
p = document.form1.pwd.value;
if(n == "")
{
alert("用户名不能为空！");
document.form1.name.focus()
return false;
}
else if(p == "")
{
alert("密码不能为空！");
document.form1.pwd.focus();
return false;
}
else
{
return true;
}
}
</script>
<form name="form1" onSubmit="return tijiao()" method="post" action="">
<table align=center border="1" cellpadding="0" cellspacing="0" width="180">
<tr><td><span class="style2">用户名：</span><input type="text" name="name" style="WIDTH: 100px; HEIGHT: 18px">
</td></tr>
<tr><td><span class="style2">密  码：</span><input type="password" name="pwd" style="WIDTH: 100px; HEIGHT: 18px">
</td></tr>
<tr><td align="center">
<input type="submit" name="Submit" value="提交"> </td>
</tr>
</table></form>

<%
String name = request.getParameter("name");
if(name != null){
byte n[] = name.getBytes("ISO-8859-1"); //传递中文信息以防乱码
name = new String(n);

String pwd = request.getParameter("pwd");

ResultSet rs;
rs = conn.executeQuery("select ManagerID,ManagerName from Recitation_Manager where loginname='"+ name +"' and pwd='"+ pwd +"'");
rs.last();
if(rs.getRow()>0)
{
rs.first();
session.setAttribute("ManagerID",rs.getString("ManagerID"));
session.setAttribute("ManagerName",rs.getString("ManagerName"));
response.sendRedirect("admin_index.jsp");
}
else
{
out.print("<p align=center><font color=red>管理员用户名和密码不正确!</font></p>");
}
conn.close();
}
%>