Copy entire directory contents to another directory? [duplicate]

FileUtils.copyDirectory()

Copies a whole directory to a new location preserving the file dates. This method copies the specified directory and all its child directories and files to the specified destination. The destination is the new location and name of the directory.

The destination directory is created if it does not exist. If the destination directory did exist, then this method merges the source with the destination, with the source taking precedence.

To do so, here's the example code

String source = "C:/your/source";File srcDir = new File(source);String destination = "C:/your/destination";File destDir = new File(destination);try {    FileUtils.copyDirectory(srcDir, destDir);} catch (IOException e) {    e.printStackTrace();}

The following is an example of using JDK7.

public class CopyFileVisitor extends SimpleFileVisitor<Path> {    private final Path targetPath;    private Path sourcePath = null;    public CopyFileVisitor(Path targetPath) {        this.targetPath = targetPath;    }    @Override    public FileVisitResult preVisitDirectory(final Path dir,    final BasicFileAttributes attrs) throws IOException {        if (sourcePath == null) {            sourcePath = dir;        } else {        Files.createDirectories(targetPath.resolve(sourcePath                    .relativize(dir)));        }        return FileVisitResult.CONTINUE;    }    @Override    public FileVisitResult visitFile(final Path file,    final BasicFileAttributes attrs) throws IOException {    Files.copy(file,        targetPath.resolve(sourcePath.relativize(file)));    return FileVisitResult.CONTINUE;    }}

To use the visitor do the following

Files.walkFileTree(sourcePath, new CopyFileVisitor(targetPath));

If you'd rather just inline everything (not too efficient if you use it often, but good for quickies)

    final Path targetPath = // target    final Path sourcePath = // source    Files.walkFileTree(sourcePath, new SimpleFileVisitor<Path>() {        @Override        public FileVisitResult preVisitDirectory(final Path dir,                final BasicFileAttributes attrs) throws IOException {            Files.createDirectories(targetPath.resolve(sourcePath                    .relativize(dir)));            return FileVisitResult.CONTINUE;        }        @Override        public FileVisitResult visitFile(final Path file,                final BasicFileAttributes attrs) throws IOException {            Files.copy(file,                    targetPath.resolve(sourcePath.relativize(file)));            return FileVisitResult.CONTINUE;        }    });

With Groovy, you can leverage Ant to do:

new AntBuilder().copy( todir:'/path/to/destination/folder' ) {  fileset( dir:'/path/to/src/folder' )}

AntBuilder is part of the distribution and the automatic imports list which means it is directly available for any groovy code.