Java Directory Copy nio copyDirectory(File sourceDirectory, File targetDirectory)

Description

Copies directories, preserving file attributes.

License

Apache License

Declaration

static void copyDirectory(File sourceDirectory, File targetDirectory) throws IOException 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright 2014 See AUTHORS file./*w w w . ja  v  a 2 s.c om*/
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

import java.io.File;
import java.io.IOException;
import java.nio.file.*;
import java.nio.file.attribute.BasicFileAttributes;

public class Main {
    /**
     * Copies directories, preserving file attributes.
     * <p>
     * The {@link org.zeroturnaround.zip.commons.FileUtilsV2_2#copyDirectory(File, File)} function does not
     * preserve file attributes.
     */
    static void copyDirectory(File sourceDirectory, File targetDirectory) throws IOException {

        final Path sourcePath = Paths.get(sourceDirectory.toURI()).toRealPath();
        final Path targetPath = Paths.get(targetDirectory.toURI());

        Files.walkFileTree(sourcePath, new SimpleFileVisitor<Path>() {
            @Override
            public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
                Path relative = sourcePath.relativize(dir);
                Path target = targetPath.resolve(relative);
                File folder = target.toFile();
                if (!folder.exists()) {
                    mkdirs(folder);
                }
                return FileVisitResult.CONTINUE;
            }

            @Override
            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                Path relative = sourcePath.relativize(file);
                Path target = targetPath.resolve(relative);
                Files.copy(file, target, StandardCopyOption.COPY_ATTRIBUTES);
                return FileVisitResult.CONTINUE;
            }
        });
    }

    static void mkdirs(File path) throws IOException {
        if (!path.mkdirs()) {
            throw new IOException("Can't create folder(s): " + path);
        }
    }
}

Related

1. copyDirectory(File source, File destination)
2. copyDirectory(File source, File destination, boolean recursive)
3. copyDirectory(File source, File target, boolean acceptFileInUseError)
4. copyDirectory(File sourceDir, File destinationDir)
5. copyDirectory(File sourceDir, File targetDir)
6. copyDirectory(File sourceFile, File destFile)
7. copyDirectory(File src, File dest)
8. copyDirectory(File src, File target)
9. copyDirectory(File srcDir, File destDir)