Java Servlet to Write to a temporary file

/**
* Write to a temporary file
* @author Sanjeev Kulkarni
* @since 0.5 - 18-Nov-2009 3:23:35 PM
* @version 0.1
*/

package com.ack.web.servlet;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class WriteToATemporaryFile extends HttpServlet {

public void doGet( HttpServletRequest req, HttpServletResponse res )
throws ServletException, IOException {
// get the web applications temporary directory
File tempDir = (File) getServletContext().
getAttribute( "javax.servlet.context.tempdir" );

// create a temporary file in that directory
File tempFile = File.createTempFile( getServletName(), ".tmp", tempDir );

// write to file
FileWriter fw = new FileWriter( tempFile );
try {
fw.write( "done and dusted" );
}
finally {
fw.close();
}

// tell servlet client where to look for file
res.getWriter().println( "check file: " + tempFile.getAbsolutePath() );
}

}