Java File Copy nio copy(File source, File destination)

Description

copy

License

Open Source License

Declaration

public static final void copy(File source, File destination)
            throws IOException 

Method Source Code

//package com.java2s;
//License from project: Open Source 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 {
    public static final void copy(File source, File destination)
            throws IOException {
        if (source.isDirectory()) {
            copyDirectory(source, destination);
        } else {//from w ww  .  j  a  va 2  s. c o  m
            copyFile(source, destination);
        }
    }

    public static final void copyDirectory(File source, File destination)
            throws IOException {
        if (!source.isDirectory()) {
            throw new IllegalArgumentException("Source ("
                    + source.getPath() + ") must be a directory.");
        }

        if (!source.exists()) {
            throw new IllegalArgumentException("Source directory ("
                    + source.getPath() + ") doesn't exist.");
        }

        if (destination.exists()) {
            throw new IllegalArgumentException("Destination ("
                    + destination.getPath() + ") exists.");
        }

        destination.mkdirs();
        File[] files = source.listFiles();

        for (File file : files) {
            if (file.isDirectory()) {
                copyDirectory(file, new File(destination, file.getName()));
            } else {
                copyFile(file, new File(destination, file.getName()));
            }
        }
    }

    public static final void copyFile(File source, File destination)
            throws IOException {
        FileChannel sourceChannel = new FileInputStream(source)
                .getChannel();
        FileChannel targetChannel = new FileOutputStream(destination)
                .getChannel();
        sourceChannel.transferTo(0, sourceChannel.size(), targetChannel);
        sourceChannel.close();
        targetChannel.close();
    }
}

Related

1. copy(File source, File dest)
2. copy(File source, File dest)
3. copy(File source, File dest)
4. copy(File source, File dest)
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6. copy(File source, File destination)
7. copy(File source, File destination)
8. copy(File source, File destination)
9. copy(File source, File destination)