Java Utililty Methods File Copy

List of utility methods to do File Copy

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Description

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

Method

voidcopyFiles(File src, File dest, boolean override)
copy Files 
copyFiles(src, dest, override, null);
voidcopyFiles(File src, File dest, FilenameFilter filter)
copy Files 
File[] files = src.listFiles(filter);
if (files == null) {
    System.err.println("copyFiles: No files in src directory " + src);
    return;
for (int i = 0; i < files.length; i++) {
    File srcFile = files[i];
    File destFile = new File(dest, srcFile.getName());
...
voidcopyFiles(File src, File dest, String... filenameExtension)
This method copies, from a given directory, a set of files with a given list of file extensions. 
List<File> files = new ArrayList<File>();
if (src.isDirectory() == false) {
    return;
} else {
    files.add(src);
    while (files.isEmpty() == false) {
        File tmpFile = files.remove(files.size() - 1);
        for (File subFile : tmpFile.listFiles()) {
...
voidcopyFiles(File srcDir, File destDir, String... regexps)
Copies files from source to destination dir. 
if (!(srcDir.exists() && srcDir.isDirectory()))
    throw new IllegalArgumentException("Source directory doesn't exist: " + srcDir.getAbsolutePath());
if (!(destDir.exists() && destDir.isDirectory()))
    throw new IllegalArgumentException("Destination directory doesn't exist: " + destDir.getAbsolutePath());
File[] files = srcDir.listFiles();
for (File file : files) {
    if (file.isFile()) {
        String name = file.getName();
...
voidcopyFiles(File srcFile, File destFolder)
copy Files 
InputStream in = new FileInputStream(srcFile);
if (!destFolder.exists()) {
    destFolder.mkdirs();
File destFile = new File(destFolder, srcFile.getName());
OutputStream out = new FileOutputStream(destFile);
byte[] buffer = new byte[1024];
int length;
...
voidcopyFiles(InputStream inStream, FileOutputStream outStream)
copy Files 
byte[] buffer = new byte[1024];
int length;
while ((length = inStream.read(buffer)) > 0) {
    outStream.write(buffer, 0, length);
voidcopyFiles(String from, String to)
copy Files 
File file = new File(from);
File toFolder = new File(to);
if (!file.exists() || !file.isDirectory()) {
    return;
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
    File child = new File(toFolder, files[i].getName());
...
booleancopyFiles(String fromDirName, String toDirName)
Copy all the files under fromDirName to toDirName 
boolean res = true;
File fromDir = new File(fromDirName);
if (!fromDir.exists() || !fromDir.isDirectory() || !fromDir.canRead()) {
    System.err.println(fromDir.getAbsolutePath() + "doesn't exist, or isn't file, or can't be read");
    return false;
File[] files = fromDir.listFiles();
for (int i = 0; i < files.length; i++) {
...
booleancopyFileToPath(String fileToPath, String fileName, String sourceFile)
copy File To Path 
try {
    File dic = new File(fileToPath);
    if (!dic.exists()) {
        dic.mkdirs();
    InputStream is = new BufferedInputStream(new FileInputStream(sourceFile));
    OutputStream os = new BufferedOutputStream(new FileOutputStream(fileToPath + "/" + fileName));
    byte[] bytes = new byte[1024];
...
voiddoCopyFile(File srcFile, File destFile, boolean preserveFileDate)
do Copy File 
if ((destFile.exists()) && (destFile.isDirectory())) {
    throw new IOException("Destination '" + destFile + "' exists but is a directory");
FileInputStream input = new FileInputStream(srcFile);
try {
    FileOutputStream output = new FileOutputStream(destFile);
    try {
        copy(input, output);
...