Java FileChannel Copy copyTo(File srcFile, File destFile)

Description

copy To

License

Apache License

Declaration

public static void copyTo(File srcFile, File destFile) throws IOException 

Method Source Code

//package com.java2s;
/*//from   w  w  w  .  j  a  v a 2  s.c o m
 * Copyright 2016 SyncObjects Ltda.
 * 
 * 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.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;

public class Main {
    private static final int FILE_COPY_BUFFER_SIZE = 30 * 1024;

    public static void copyTo(File srcFile, File destFile) throws IOException {
        if (srcFile == null)
            throw new IllegalArgumentException("srcfile");
        if (destFile == null)
            throw new IllegalArgumentException("destfile");

        if (destFile.isDirectory()) {
            destFile = new File(destFile, srcFile.getName());
        }
        if (srcFile.getCanonicalPath().equals(destFile.getCanonicalPath())) {
            throw new IOException("Source '" + srcFile + "' and destination '" + destFile + "' are the same");
        }
        File parentFile = destFile.getParentFile();
        if (parentFile != null) {
            if (!parentFile.mkdirs() && !parentFile.isDirectory()) {
                throw new IOException("Destination '" + parentFile + "' directory cannot be created");
            }
        }
        if (destFile.exists() && destFile.canWrite() == false) {
            throw new IOException("Destination '" + destFile + "' exists but is read-only");
        }

        FileInputStream fis = null;
        FileOutputStream fos = null;
        FileChannel input = null;
        FileChannel output = null;
        try {
            fis = new FileInputStream(srcFile);
            fos = new FileOutputStream(destFile);
            input = fis.getChannel();
            output = fos.getChannel();
            long size = input.size();
            long pos = 0;
            long count = 0;
            while (pos < size) {
                count = size - pos > FILE_COPY_BUFFER_SIZE ? FILE_COPY_BUFFER_SIZE : size - pos;
                pos += output.transferFrom(input, pos, count);
            }
        } finally {
            try {
                output.close();
            } catch (Exception ignore) {
            }
            try {
                fos.close();
            } catch (Exception ignore) {
            }
            try {
                input.close();
            } catch (Exception ignore) {
            }
            try {
                fis.close();
            } catch (Exception ignore) {
            }
        }
    }
}

Related

1. copyNio(final File source_file, final File destination_file)
2. copyRec(File src, File dst)
3. copyStream(InputStream in, long length, File out)
4. copyStreamToFile(InputStream inStream, File file)
5. copyThrowsOnException(final File source, final File destination)
6. copyToFolderAs(File fromFile, File folder, String asName)
7. copyToTemp(File srcFile)
8. copyToTempDirectory(final String file)
9. copyTransfer(String srcPath, String destPath)