java code for Another servlet to Send XML

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class SendXml extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

//get the 'file' parameter
String fileName = (String) request.getParameter("file");
if (fileName == null || fileName.equals(""))
throw new ServletException(
"Invalid or non-existent file parameter in SendXml servlet.");

// add the .doc suffix if it doesn't already exist
if (fileName.indexOf(".xml") == -1)
fileName = fileName + ".xml";

String xmlDir = getServletContext().getInitParameter("xml-dir");
if (xmlDir == null || xmlDir.equals(""))
throw new ServletException(
"Invalid or non-existent xmlDir context-param.");

ServletOutputStream stream = null;
BufferedInputStream buf = null;
try {

stream = response.getOutputStream();
File xml = new File(xmlDir + "/" + fileName);
response.setContentType("text/xml");
response.addHeader("Content-Disposition", "attachment; filename="
+ fileName);

response.setContentLength((int) xml.length());
FileInputStream input = new FileInputStream(xml);
buf = new BufferedInputStream(input);
int readBytes = 0;
while ((readBytes = buf.read()) != -1)
stream.write(readBytes);
} catch (IOException ioe) {
throw new ServletException(ioe.getMessage());
} finally {
if (stream != null)
stream.close();
if (buf != null)
buf.close();
}
}

public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

doGet(request, response);
}
}