Revision: 33949
Initial Code
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at October 15, 2010 02:41 by peceps
Initial Code
private void output(HttpServletResponse response, String filePathAndFileName, String mimeType)
throws IOException {
File file = new File(filePathAndFileName);
// set response headers
response.setContentType((mimeType != null) ? mimeType : "application/octet-stream");
response.setContentLength((int) file.length());
// read and write file
ServletOutputStream op = response.getOutputStream();
// 128 KB buffer
int bufferSize = 131072;
FileInputStream fileInputStream = new FileInputStream(file);
FileChannel fileChannel = fileInputStream.getChannel();
// 6x128 KB = 768KB byte buffer
ByteBuffer bb = ByteBuffer.allocateDirect(786432);
byte[] barray = new byte[bufferSize];
int nRead, nGet;
try {
while ((nRead = fileChannel.read(bb)) != -1) {
if (nRead == 0)
continue;
bb.position(0);
bb.limit(nRead);
while (bb.hasRemaining()) {
nGet = Math.min(bb.remaining(), bufferSize);
// read bytes from disk
bb.get(barray, 0, nGet);
// write bytes to output
op.write(barray);
}
bb.clear();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
bb.clear();
fileChannel.close();
fileInputStream.close();
}
}
Initial URL
Initial Description
Initial Title
Super fast FileServlet
Initial Tags
file
Initial Language
Java