Java FileChannel Copy copyFile(Path source, Path target)

Description

Copy a file and try to guarantee the copy is on disk.

License

Apache License

Declaration

public static void copyFile(Path source, Path target) throws IOException 

Method Source Code

//package com.java2s;
/*//from ww  w  .  jav a2 s .  co  m
 * 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.IOException;
import java.nio.channels.FileChannel;
import java.nio.file.Path;
import static java.nio.file.StandardOpenOption.CREATE_NEW;
import static java.nio.file.StandardOpenOption.READ;
import static java.nio.file.StandardOpenOption.WRITE;

public class Main {
    /**
     * Copy a file and try to guarantee the copy is on disk.
     */
    public static void copyFile(Path source, Path target) throws IOException {
        try (FileChannel in = FileChannel.open(source, READ)) {
            long size = in.size();
            try (FileChannel out = FileChannel.open(target, WRITE, CREATE_NEW)) {
                long position = 0;
                while (position < size) {
                    position += in.transferTo(position, size - position, out);
                }
                out.force(false);
            }
        }
    }
}

Related

1. copyFile(final String src, final String dest)
2. copyFile(final String src, final String dst)
3. copyFile(InputStream is, OutputStream os)
4. copyFile(java.io.File fromFile, java.io.File toFile)
5. copyFile(java.io.File in, java.io.File out)
6. copyFile(String fromFileName, String toFileName)
7. copyFile(String fromPath, String toPath)
8. copyFile(String in, String out)
9. copyFile(String infile, String outfile)