JSP Error

JSP Error

When i am running my registration.jsp getting following error.
HTTP Status 500 -

--------------------------------------------------------------------------------

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.service(JspServletWrapper.java:370)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


root cause

java.lang.NullPointerException
org.apache.jsp.registration_jsp._jspService(org.apache.jsp.registration_jsp:95)
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:322)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


note The full stack trace of the root cause is available in the Apache Tomcat/5.5.9 logs.


--------------------------------------------------------------------------------

Apache Tomcat/5.5.9

My JSP FILE IS:======registration.jsp======
========================================
<form action="userregst.jsp" method="post" name="contactForm">
<%
int registration_id=0;
dataAccessBean ob=new dataAccessBean();
ResultSet rs=ob.executeQuery("Select * from registeration");
if(rs.next())
{

if(rs.next())
{
registration_id=rs.getInt(1)+1;
}
}
else
{
registration_id=1;
}

%>
<table border="0" class="mainDataTable" width="915" style="border-collapse: collapse" bordercolor="#111111" cellpadding="0" cellspacing="0">
<tr>
<td width="219"></td>
<td class="detail_right" width="133"><font face="Verdana"><strong> User_id</strong></font></td>
<td colspan="2" class="detail_left" width="563"><font face="Verdana"><input maxLength="25" name="user_id" size="25">
</font>
</td>
</tr>
<tr>
<td width="219"></td>
<td class="detail_right" width="133">&nbsp;</td>
<td colspan="2" class="detail_left" width="563">&nbsp;</td>
</tr>
<tr>
<td width="219"></td>
<td class="detail_right" width="133"><font face="Verdana"><strong> Password</strong></font></td>
<td colspan="2" class="detail_left" width="563"><font face="Verdana"><input name="password" type="password" size="25" maxLength="25">
</font>
</td>
</tr>
......
......
<tr>
<td width="219"><font face="Verdana">&nbsp;&nbsp;&nbsp;</font></td>
<td class="detail_right" vAlign="top" width="133"><div align="right">
<font face="Verdana">
<input type="submit" value="Register Now" name="registernow" style="float: left"></font></div></td>
<td width="569" colspan="2"><font face="Verdana">&nbsp;
<input type="reset" value="Reset" name="reset"></font></td>
</tr>
<tr>
<input type="hidden" name="registration_id" value="<%=registration_id %>">
</form>

======================
Java Class=dataAccessBean.java
package com.ziaur;
import java.sql.*;

public class dataAccessBean {
private static String driver="sun.jdbc.odbc.jdbcodbcDriver";
private static String database = "F:\\globus.mdb";
private static String url="jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ="+database+";DriverID=22;READONLY=false";
private static String uid="";
private static String pass="";
Connection con=null;
Statement st=null;


public dataAccessBean()
{
try{
Class.forName(driver);
con=DriverManager.getConnection(url,uid,pass);
st=con.createStatement();
}
catch(Exception e)
{

}
}


public ResultSet executeQuery(String qry)
{
ResultSet rs=null;
try
{
System.out.println(qry);
rs=st.executeQuery(qry);

}
catch (Exception e)
{

System.out.println("data get from bean"+e.getMessage());
}
return rs;

}
public int executeUpdate(String qry)
{
int i=0;
try{
i=st.executeUpdate(qry);
System.out.println(i);
}
catch(Exception e)
{
System.out.println("Exception in Query"+e.getMessage());
}
return i;

}

}


Please help to debug my problem....
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