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From "Adress, David S." <David.S.Adr...@pfizer.com>
Subject RE: $20 bucks to the 1st person who actually solves my problem!!!
Date Fri, 08 Dec 2000 14:01:09 GMT
It didn't work

Here is a copy of the jsp page and the servlet....

JSP PAGE


<html>
<head>
<meta http-equiv="Cache-Control" content="no-cache, must-revalidate">
<meta http-equiv="Expires" content="0">
<title>Employee List</title>
</head>
<body>
Employee List
<jsp:include page="/servlet/EmployeeList" flush="true" />
</body>
</html>



List Servlet

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;

public class EmployeeList extends HttpServlet {
    public void doGet(HttpServletRequest request, HttpServletResponse
response)
        throws ServletException, IOException
    {

		HttpSession session = request.getSession(true);
		response.setIntHeader("Expires",0);		
		response.setHeader("Cache-Control","no-cache");
		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		String Logon = session.getAttribute("Logon").toString();
		String Level = session.getAttribute("Level").toString();
				
		if (Logon.compareTo("TRUE") == 0);
		else
			{
			out.println("No Access");
			return;
			}

		if (Level.compareTo("A") == 0);
		else
			{
			out.println("No Access you need to be an Admin");
			return;
			}
		
		
		String query = "SELECT EmployeeID, LastName, Firstname FROM
employees order by lastname";
		out.println("<TABLE BORDER=1>");
		out.println("	<TR>");
                out.println("           <TD COLSPAN=4 ALIGN=CENTER><a
href=\"/skills/EmployeeAdd.jsp\">Add New Employee</a></TD>");
	    out.println("	</TR>");
		out.println("	<TR>");
		out.println("		<TD>EmployeeID</TD>");
		out.println("		<TD>Lastname</TD>");
		out.println("		<TD>Firstname</TD>");	
	    out.println("		<TD>Commands</TD>");	
		out.println("	</TR>");
		try 
		{
			Connection dbconn;
			Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

			dbconn =
DriverManager.getConnection("jdbc:odbc:ADB");
        	Statement statement = dbconn.createStatement();
			ResultSet rs = statement.executeQuery( query );
	
			while(rs.next())
			{
				String empid = rs.getString(1);
				out.println("	<TR>");
				out.println("		<TD>" + empid  +
"</TD>");				
				out.println("		<TD>" +
rs.getString(2) + "</TD>");				
				out.println("		<TD>" +
rs.getString(3) + "</TD>");					
                                out.println("           <TD><a
href=\"/servlet/EmployeeP?Process=D&EmpID=" + empid + "\">Delete</a>
Edit</TD>");                                
				out.println("	</TR>");
			}		
		}
        catch ( Exception excp ) 
		{
        	 // process remaining Exceptions here
	         excp.printStackTrace();
        	 out.println(excp.toString());
        }
		out.println("</TABLE>");
	}

}



-----Original Message-----
From: Chad Reese [mailto:creese@presideo.com]
Sent: Friday, December 08, 2000 8:59 AM
To: tomcat-user@jakarta.apache.org
Subject: Re: $20 bucks to the 1st person who actually solves my
problem!!!


Try this in your servlet:
                    res.setIntHeader("Expires", 0);
                    res.setHeader("Cache-Control", "no-cache");

And this in the page source:
    <META HTTP-EQUIV="cache-control" CONTENT="no-cache">
    <META HTTP-EQUIV="expires" CONTENT="0">

IE ignores the cache directives but seems to respect the Expires header.
Both of

the above probably aren't necessary but they don't hurt. Hope this helps.

Chad

P.S. Help is free but the title did get my attention :-)

"Adress, David S." wrote:

> I am on this for days and I can't figure out what I'm doing wrong. I will
> send $20 bucks to 1st person who actually solves my problem.
>
> I am using jsp page's to control the layout of my page and servlets to
spit
> back
> table data or to do database transactions.
>
> I have a jsp page that displays a list of employees. The jsp page
> has an include statement to include the servlet to spit out the table.
> The jsp just handles the general look of the page and the servlet just
> spits out the table and table html tags. Next to each record I have an add
> and
> delete hyperlink. If someone clicks the add link it displays another page
to
> add
> an employee and then the action servlet adds the record and then goes back
> to the jsp
> list page. If some one deletes a record it calls a servlet to delete and
> then the servlet redirects back to the jsp list page. But the list doesn't
> display the updated data without having me hit the refresh button in the
> browser.
>
> I tried using Tomcat and now am using Jrun and am still having the same
> problem.
>
> I've included all the proper meta tags in the jsp list page not to cache
but
> it's not working. I've also tries doing it with reponse.setHeader but it
> doesn't work either.
>
> I've tried sending a random number param to the page
> ShowList?rnd=Randomnumber it still doesn't work.

--
Chad Reese
Software Engineer
Presideo

Phone: 561 - 581 - 7079
Email: mailto:creese@presideo.com


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