Java Utililty Methods FileChannel Copy

List of utility methods to do FileChannel Copy

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Description

The list of methods to do FileChannel Copy are organized into topic(s).

Method

longcopyStream(InputStream in, long length, File out)
copies the contens of a stream to a file 
FileOutputStream stream = new FileOutputStream(out);
ReadableByteChannel cin = Channels.newChannel(in);
long result = copyChannel(cin, length, stream.getChannel());
stream.close();
return result;
voidcopyStreamToFile(InputStream inStream, File file)
copy Stream To File 
try (ReadableByteChannel in = Channels.newChannel(inStream)) {
    try (FileOutputStream outStream = new FileOutputStream(file)) {
        FileChannel out = outStream.getChannel();
        long offset = 0;
        long quantum = 1024 * 1024;
        long count;
        while ((count = out.transferFrom(in, offset, quantum)) > 0) {
            offset += count;
...
voidcopyThrowsOnException(final File source, final File destination)
Copy src file to dst file. 
try (FileInputStream inStream = new FileInputStream(source);
        FileOutputStream outStream = new FileOutputStream(destination)) {
    final FileChannel inChannel = inStream.getChannel();
    final FileChannel outChannel = outStream.getChannel();
    final long size = inChannel.size();
    long position = 0;
    while (position < size) {
        position += inChannel.transferTo(position, 1024L * 1024L, outChannel);
...
voidcopyTo(File srcFile, File destFile)
copy To 
if (srcFile == null)
    throw new IllegalArgumentException("srcfile");
if (destFile == null)
    throw new IllegalArgumentException("destfile");
if (destFile.isDirectory()) {
    destFile = new File(destFile, srcFile.getName());
if (srcFile.getCanonicalPath().equals(destFile.getCanonicalPath())) {
...
FilecopyToFolderAs(File fromFile, File folder, String asName)
copy To Folder As 
mylogger.log(Level.INFO, "Copying:[{0}] file to folder [{1}]  as {2}",
        new Object[] { fromFile.getAbsolutePath(), folder.getAbsolutePath(), asName });
if (!folder.isDirectory() || !folder.exists()) {
    mylogger.log(Level.SEVERE, "Invalid folder {0} ! COPY FAILED",
            new Object[] { folder.getAbsolutePath() });
    return null;
if (!fromFile.exists()) {
...
FilecopyToTemp(File srcFile)
copy To Temp 
File tmpFile = File.createTempFile("filecompare", "tmp");
if (srcFile.isDirectory()) {
    tmpFile.delete();
    tmpFile.mkdir();
copy(srcFile, tmpFile);
return tmpFile;
StringcopyToTempDirectory(final String file)
copy To Temp Directory 
try {
    final String ending = file.substring(file.lastIndexOf('.'));
    final File tempfile = File.createTempFile("model", ending);
    copyFile(new File(file), tempfile);
    return tempfile.getAbsolutePath();
} catch (final IOException e) {
    e.printStackTrace();
return null;
voidcopyTransfer(String srcPath, String destPath)
copy Transfer 
FileChannel srcChannel = new FileInputStream(srcPath).getChannel();
FileChannel destChannel = new FileOutputStream(destPath).getChannel();
try {
    srcChannel.transferTo(0, srcChannel.size(), destChannel);
} finally {
    srcChannel.close();
    destChannel.close();
voidcopyTree(File sourceLocation, File targetLocation)
copy Tree 
if (sourceLocation.isDirectory()) {
    if (!targetLocation.exists()) {
        targetLocation.mkdirs();
        targetLocation.setLastModified(sourceLocation.lastModified());
    String[] children = sourceLocation.list();
    for (int i = 0; i < children.length; i++) {
        copyTree(new File(sourceLocation, children[i]), new File(targetLocation, children[i]));
...
voidcopyTree(File srcFile, File trgFile)
Copies a whole directory tree to another directory. 
if (srcFile.isDirectory()) {
    trgFile.mkdir();
    for (File file : srcFile.listFiles()) {
        copyTree(file, new File(trgFile, file.getName()));
} else {
    FileChannel in = null, out = null;
    try {
...