Java Directory Copy copyDirectory(File source, File target)

Description

Helper function used to copy the directory.

License

Open Source License

Parameter

Parameter	Description
source	- The source directory/folder.
target	- THe target directory/ folder.

Exception

Parameter	Description
IOException	- If anything during the operation fails.

Return

- true or false.

Declaration

public static boolean copyDirectory(File source, File target) 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;

public class Main {
    /**//from w  w  w. ja  va2s .  co m
     * Helper function used to copy the directory.
     * Recursively calls it on all sub files and directories.
     *
     * @param source - The source directory/folder.
     * @param target - THe target directory/ folder.
     * @return - true or false.
     * @throws IOException - If anything during the operation fails.
     */
    public static boolean copyDirectory(File source, File target) throws IOException {
        // check first if source file exists or not
        if (!source.exists()) {
            return false;
        }
        if (source.isDirectory()) {
            if (!target.exists()) {
                target.mkdir();
            }

            File[] listFile = source.listFiles();
            for (File f : listFile) {
                File sourceFile = new File(source, f.getName());
                File outputFile = new File(target, f.getName());
                if (f.isDirectory()) {
                    copyDirectory(sourceFile, outputFile);
                } else {
                    copyFile(sourceFile, outputFile);
                }
            }
        }

        return true;
    }

    /**
     * Helper function to copy the file.
     * 
     * @param input - The input file.
     * @param output - The output file to which the input should be copied.
     * @throws IOException - Any exception thrown during the operation.
     */
    public static void copyFile(File input, File output) throws IOException {
        FileInputStream inputStream = new FileInputStream(input);
        // target file declaration
        FileOutputStream outputStream = new FileOutputStream(output);
        int lengthStream;
        byte[] buff = new byte[1024];
        while ((lengthStream = inputStream.read(buff)) > 0) {
            // writing to the target file contents of the source file
            outputStream.write(buff, 0, lengthStream);
        }
        outputStream.close();
        inputStream.close();
    }
}

Related

1. copyDirectory(File source, File destination)
2. copyDirectory(File source, File destination)
3. copyDirectory(File source, File destination)
4. copyDirectory(File source, File destination, boolean overwrite)
5. copyDirectory(File source, File destination, String endWith)
6. copyDirectory(File source, File target)
7. copyDirectory(File source, File target)
8. copyDirectory(File source, File target)
9. copyDirectory(File source, File target)