Java Recursive Copy recursiveCopy(File src, File dest)

Description

recursive Copy

License

Open Source License

Declaration

private static void recursiveCopy(File src, File dest) throws IOException 

Method Source Code

//package com.java2s;
/**//from   www  .  j  a v  a2 s.  c o m
 * Copyright (C) 2010-2016 Gordon Fraser, Andrea Arcuri and EvoSuite
 * contributors
 *
 * This file is part of EvoSuite.
 *
 * EvoSuite is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3.0 of the License, or
 * (at your option) any later version.
 *
 * EvoSuite is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with EvoSuite. If not, see <http://www.gnu.org/licenses/>.
 */

import java.io.*;

public class Main {
    private static void recursiveCopy(File src, File dest) throws IOException {

        if (src.isDirectory()) {

            //the destination might not exist. if so, let's create it
            if (!dest.exists()) {
                dest.mkdirs();
            }

            //iterate over the children
            for (String file : src.list()) {
                File srcFile = new File(src, file);
                File destFile = new File(dest, file);
                //recursive call
                recursiveCopy(srcFile, destFile);
            }

        } else {

            boolean sameTime = src.lastModified() == dest.lastModified();
            if (sameTime) {
                //file was not modified, so no need to copy over
                return;
            }

            try (InputStream in = new FileInputStream(src); OutputStream out = new FileOutputStream(dest);) {

                byte[] buffer = new byte[2048];

                int length;
                //copy the file content in bytes
                while ((length = in.read(buffer)) > 0) {
                    out.write(buffer, 0, length);
                }
            }

            //as it is a copy, make sure to get same time stamp as src, otherwise it ll be always copied over
            dest.setLastModified(src.lastModified());
        }

    }
}

Related

1. recursiveCopy(File copyFromDir, File copyToDir, boolean overwrite)
2. recursiveCopy(File sourceFile, File targetLocation)
3. recursiveCopyDir(File source, File destination)
4. recursiveCopyFile(File srcDir, File destDir)