Java FileChannel Copy copyFile(File src, File dst)

Description

Copy a file to another folder

License

Open Source License

Parameter

Parameter	Description
src	Origin file
dst	Destination FOLDER.

Exception

Parameter	Description
FileNotFoundException	an exception

Declaration

public static void copyFile(File src, File dst) throws FileNotFoundException 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;

public class Main {
    /**//from  ww w  . jav  a2  s  .c o  m
     * Copy a file to another folder
     * @param src Origin file
     * @param dst Destination FOLDER.
     * @throws FileNotFoundException 
     */
    public static void copyFile(File src, File dst) throws FileNotFoundException {

        if (src == null) {
            throw new IllegalArgumentException("File src can't be null!!");
        }

        if (dst == null) {
            throw new IllegalArgumentException("File dst can't be null!!");
        }

        if (!src.exists()) {
            throw new FileNotFoundException("File " + src.getName() + " can't be found!");
        }

        if (!dst.exists()) {
            dst.mkdirs();
        }

        dst = new File(dst.getPath() + "/" + src.getName());

        if (!isFileInUse(src)) {
            FileChannel in = null;
            FileChannel out = null;
            try {
                in = new FileInputStream(src).getChannel();
                out = new FileOutputStream(dst).getChannel();

                in.transferTo(0, in.size(), out);

            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    if (in != null) {
                        in.close();
                    }

                    if (out != null) {
                        out.close();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

    }

    /**
     * Tests if the file specified is being used by another process 
     * @param file File to be tested
     * @return true if the file is being used, false otherwise
     */
    public static boolean isFileInUse(File file) {
        boolean result = false;

        FileChannel fc = null;
        try {
            fc = new RandomAccessFile(file, "rw").getChannel();
        } catch (FileNotFoundException e) {
            if (!file.exists()) {
                System.err.println("The file " + file.getName() + " not exists!!");
            } else {
                System.out.println("The file " + file.getName() + " is in use by another process!!");
                result = true;
            }
        } finally {
            if (fc != null) {
                try {
                    fc.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            } else {
                return result;
            }
        }

        return false;
    }
}

Related

1. copyFile(File src, File destination)
2. copyFile(File src, File destination)
3. copyFile(File src, File dst)
4. copyFile(File src, File dst)
5. copyFile(File src, File dst)
6. copyFile(File src, File dst)
7. copyFile(File src, File target)
8. copyFile(File src, File target)
9. copyFile(File srcFile, File destFile, boolean preserveFileDate)