Why I have 3 empty ligns in the file downloaded with a JSP

Question

Hello,
When a user select some data (extracted from an Oracle database), he could save the data in a flat file. To do this functionnality, I use a JSP which creates a file with the result of the query, and I download to the browser the file by using :
response.setHeader("Cache-Control","no-store");
response.setDateHeader("Expires",1000);
response.setContentType("application/x_msdownload");
response.setHeader("Content-Disposition","attachement;filename=" + outputFile);
I could save or open the file.
BUT I have 3 empty ligns at the begining of the downloaded file.
Do you know why?
Next, is it my code of the JSP used to create the file on the server, download it to the browser and delete it:
<%
currentReport.load(currentConnection, reportNm, whereCond, inputFile);
response.setHeader("Cache-Control","no-store");
response.setDateHeader("Expires",1000);
response.setContentType("application/x_msdownload");
response.setHeader("Content-Disposition","attachement;filename=" + outputFile);
File fin = new File( inputFile);
if (! (fin.canRead() || fin.isFile()))
SecurityException se = new SecurityException( inputFile);
throw se;
BufferedReader br = new BufferedReader(new FileReader(fin));
while ((currentLine = br.readLine()) != null)
out.println( currentLine);
br.close();
currentReport.deleteReport();
response.flushBuffer();
%>

Answer 1

I wouldn't use JSP for this, I'd use servlets...
But the reason is cuz you have 3 lines before the data is written, say like this:
<@page import="..." >[newline]
<@page import="..." >[newline]
<%
response.setHeader...
%>[newline]
<%
code to get the file...
%>