http://snippets.dzone.com/posts Sun, 27 Jul 2008 08:53:09 GMT DZone Snippets: file code http://snippets.dzone.com/posts/show/4946 <code> <br /> public static void fileCopy( File in, File out ) <br /> throws IOException <br /> { <br /> FileChannel inChannel = new FileInputStream( in ).getChannel(); <br /> FileChannel outChannel = new FileOutputStream( out ).getChannel(); <br /> try <br /> { <br />// inChannel.transferTo(0, inChannel.size(), outChannel); // original -- apparently has trouble copying large files on Windows <br /> <br /> // magic number for Windows, 64Mb - 32Kb) <br /> int maxCount = (64 * 1024 * 1024) - (32 * 1024); <br /> long size = inChannel.size(); <br /> long position = 0; <br /> while ( position < size ) <br /> { <br /> position += inChannel.transferTo( position, maxCount, outChannel ); <br /> } <br /> } <br /> finally <br /> { <br /> if ( inChannel != null ) <br /> { <br /> inChannel.close(); <br /> } <br /> if ( outChannel != null ) <br /> { <br /> outChannel.close(); <br /> } <br /> } <br /> } <br /></code> Fri, 04 Jan 2008 22:40:01 GMT http://snippets.dzone.com/posts/show/4946 frost137 (Douglas Wyatt) http://snippets.dzone.com/posts/show/4629 // description of your code here <br /> <br /><code> <br /> /** <br /> * Sends a file to the ServletResponse output stream. Typically <br /> * you want the browser to receive a different name than the <br /> * name the file has been saved in your local database, since <br /> * your local names need to be unique. <br /> * <br /> * @param req The request <br /> * @param resp The response <br /> * @param filename The name of the file you want to download. <br /> * @param original_filename The name the browser should receive. <br /> */ <br /> private void doDownload( HttpServletRequest req, HttpServletResponse resp, <br /> String filename, String original_filename ) <br /> throws IOException <br /> { <br /> File f = new File(filename); <br /> int length = 0; <br /> ServletOutputStream op = resp.getOutputStream(); <br /> ServletContext context = getServletConfig().getServletContext(); <br /> String mimetype = context.getMimeType( filename ); <br /> <br /> // <br /> // Set the response and go! <br /> // <br /> // <br /> resp.setContentType( (mimetype != null) ? mimetype : "application/octet-stream" ); <br /> resp.setContentLength( (int)f.length() ); <br /> resp.setHeader( "Content-Disposition", "attachment; filename=\"" + original_filename + "\"" ); <br /> <br /> // <br /> // Stream to the requester. <br /> // <br /> byte[] bbuf = new byte[BUFSIZE]; <br /> DataInputStream in = new DataInputStream(new FileInputStream(f)); <br /> <br /> while ((in != null) && ((length = in.read(bbuf)) != -1)) <br /> { <br /> op.write(bbuf,0,length); <br /> } <br /> <br /> in.close(); <br /> op.flush(); <br /> op.close(); <br /> } <br /></code> Tue, 09 Oct 2007 23:12:04 GMT http://snippets.dzone.com/posts/show/4629 frost137 (Douglas Wyatt)