help needed with this jsp code

From:
ros <ros060@gmail.com>
Newsgroups:
comp.lang.java.programmer
Date:
12 May 2007 01:31:38 -0700
Message-ID:
<1178958698.075213.209980@e51g2000hsg.googlegroups.com>
Hello,

I am trying to modify this sample code from SAMS JSP in 21 days. This
code shows the records from a database table. Presently it has 2
buttons, one for showing the "next record" and the other for "previous
record". On clicking the buttons Javascript functions are called.

I have added 2 buttons to it so that I can move from any record to the
first record and last record.

But I am stuck and don't understand how to go about it. Would be
really thankful if somebody guides me with this one. I have pasted the
complete code below.

Thanks in advance.
ros

<%@ page import="java.sql.*" %>
<% Class.forName("com.mysql.jdbc.Driver"); %>

<HTML>
    <HEAD>
        <TITLE>Navigating in a Database Table </TITLE>
    </HEAD>

    <BODY>
        <H1>Navigating in a Database Table </H1>
        <FORM NAME="form1" ACTION="ch17_04.jsp" METHOD="POST">

        <%
            int current = 1;
            if(request.getParameter("hidden") != null) {
                current =
Integer.parseInt(request.getParameter("hidden"));
            }

            Connection connection =
DriverManager.getConnection("jdbc:mysql://localhost/my-database",
"root", "password");
            Statement statement =
connection.createStatement( ResultSet.TYPE_SCROLL_INSENSITIVE,
ResultSet.CONCUR_READ_ONLY);
            ResultSet resultset = statement.executeQuery("select *
from customer");

            if(current < 1){
                current = 1;
            }

            resultset.last();
            int rows = resultset.getRow();
            if(current <= rows){
                resultset.absolute(current);
            }
        %>

            <TABLE BORDER="1">
                <TR>
                    <TH>Customer ID</TH>
                    <TH>First Name</TH>
                    <TH>Last Name</TH>
                    <TH>Dat Of Birth</TH>
                    <TH>Club Member</TH>
                </TR>
                <TR>
                    <TD> <%= resultset.getString(1) %> </TD>
                    <TD> <%= resultset.getString(2) %> </TD>
                    <TD> <%= resultset.getString(3) %> </TD>
                    <TD> <%= resultset.getString(4) %> </TD>
                    <TD> <%= resultset.getString(5) %> </TD>
                </TR>
            </TABLE>
            <BR>
            <INPUT TYPE="HIDDEN" NAME="hidden" VALUE="<%= current %>">
            <INPUT TYPE="BUTTON" VALUE="First Record"
ONCLICK="moveFirst()">
            <INPUT TYPE="BUTTON" VALUE="Next Record"
ONCLICK="moveNext()">
            <INPUT TYPE="BUTTON" VALUE="Previous Record"
ONCLICK="movePrevious()">
            <INPUT TYPE="BUTTON" VALUE="Last Record"
ONCLICK="moveLast()">
        </FORM>

        <SCRIPT LANGUAGE="JavaScript">
            <!--
            function moveFirst()
            {
                var counter = 0
                counter = parseInt(document.form1.hidden.value) + 0
                document.form1.hidden.value = counter
                form1.submit()
            }

            function moveNext()
            {
                var counter = 0
                counter = parseInt(document.form1.hidden.value) + 1
                document.form1.hidden.value = counter
                form1.submit()
            }

            function movePrevious()
            {
                var counter = 0
                counter = parseInt(document.form1.hidden.value) - 1
                document.form1.hidden.value = counter
                form1.submit()
            }

            function moveLast()
            {
                var counter = 0
                counter = parseInt(document.form1.hidden.value) + 1
                document.form1.hidden.value = counter
                form1.submit()
            }
            // -->
        </SCRIPT>
    </BODY>
</HTML>

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