Java Path Copy nio copyRecursively(File src, File dest)

Description

copy Recursively

License

Apache License

Declaration

public static void copyRecursively(File src, File dest) throws IOException 

Method Source Code

//package com.java2s;
/*//w ww. ja  va2 s  . c  o  m
 * Copyright 2016-2017 the original author or authors.
 *
 * 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.io.InputStream;
import java.io.OutputStream;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.StandardCopyOption;
import java.nio.file.attribute.BasicFileAttributes;

public class Main {
    public static final int BUFFER_SIZE = 4096;

    public static void copyRecursively(File src, File dest) throws IOException {
        copyRecursively(src.toPath(), dest.toPath());
    }

    public static void copyRecursively(Path src, Path dest) throws IOException {
        BasicFileAttributes srcAttr = Files.readAttributes(src, BasicFileAttributes.class);

        if (srcAttr.isDirectory()) {
            Files.walkFileTree(src, new SimpleFileVisitor<Path>() {
                @Override
                public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
                    Files.createDirectories(dest.resolve(src.relativize(dir)));
                    return FileVisitResult.CONTINUE;
                }

                @Override
                public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                    Files.copy(file, dest.resolve(src.relativize(file)), StandardCopyOption.REPLACE_EXISTING);
                    return FileVisitResult.CONTINUE;
                }
            });
        } else if (srcAttr.isRegularFile()) {
            Files.copy(src, dest);
        } else {
            throw new IllegalArgumentException("Source File must denote a directory or file");
        }
    }

    public static int copy(File in, File out) throws IOException {
        return copy(Files.newInputStream(in.toPath()), Files.newOutputStream(out.toPath()));
    }

    public static int copy(InputStream in, OutputStream out) throws IOException {

        try {
            int byteCount = 0;
            byte[] buffer = new byte[BUFFER_SIZE];
            int bytesRead = -1;
            while ((bytesRead = in.read(buffer)) != -1) {
                out.write(buffer, 0, bytesRead);
                byteCount += bytesRead;
            }
            out.flush();
            return byteCount;
        } finally {
            try {
                in.close();
            } catch (IOException ex) {
            }
            try {
                out.close();
            } catch (IOException ex) {
            }
        }
    }
}

Related

1. copyFilesRecursively(final Path from, final Path to)
2. copyFileToArchive(InputStream srcInputStream, Path destPath)
3. copyFileToDataFolder(ClassLoader cl, String resourceName, Path targetFolder, boolean replace)
4. copyRecursive(Path source, Path target, CopyOption... options)
5. copyRecursively(File fromDirectory, File toDirectory)
6. copyRecursively(File src, File dest)
7. copyRecursively(final Path source, final Path destination, final CopyOption... options)
8. copyRecursively(Path source, Path target, AtomicLong bytesCounter, CopyOption... copyOptions)
9. copyRecursivelyHelper(Path source, Path target, AtomicLong bytesCounter, CopyOption... copyOptions)