Java Copy File copyFilesRecursive(File src, File dest)

Description

Copies files and directories recursively.

License

Apache License

Parameter

Parameter	Description
src	the source file to copy. Can be a file or a directory.
dest	the destination to copy to. Can be a file or directory.

Exception

Parameter	Description

Return

a List of the newly created Files

Declaration

public static List<File> copyFilesRecursive(File src, File dest) throws IOException 

Method Source Code

//package com.java2s;
/*/*from   w  ww. j a  v a  2 s.c  o m*/
 * Copyright 2004 - 2012 Cardiff University.
 *
 * 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.*;

import java.util.ArrayList;
import java.util.List;

public class Main {
    /**
     * Copies files and directories recursively. The destination does not
     * have to exist yet.
     *
     * @param src  the source file to copy. Can be a file or a directory.
     * @param dest the destination to copy to. Can be a file or directory.
     * @return a List of the newly created Files
     * @throws java.io.FileNotFoundException if src does not exist
     * @throws java.io.IOException           if src is a directory and dest exists
     *                                       and is not a directory, or an IO error occurs.
     */
    public static List<File> copyFilesRecursive(File src, File dest) throws IOException {
        ArrayList<File> list = new ArrayList<File>();
        if (!src.exists()) {
            throw new FileNotFoundException("Input file does not exist.");
        }
        if (src.isDirectory()) {
            if (!dest.exists()) {
                dest.mkdirs();
            } else if (!dest.isDirectory()) {
                throw new IOException("cannot write a directory to a file.");
            }
            list.add(dest);
            File[] srcFiles = src.listFiles();
            for (int i = 0; i < srcFiles.length; i++) {
                list.addAll(copyFilesRecursive(srcFiles[i], new File(dest, srcFiles[i].getName())));
            }
        } else {
            if (dest.exists() && dest.isDirectory()) {
                dest = new File(dest, src.getName());
            }
            BufferedInputStream in = new BufferedInputStream(new FileInputStream(src));
            BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(dest));
            byte[] bytes = new byte[8192];
            int c;
            while ((c = in.read(bytes)) != -1) {
                out.write(bytes, 0, c);
            }
            out.flush();
            out.close();
            in.close();
            list.add(dest);
        }
        return list;
    }
}

Related

1. copyFileSafe(File destinationFileName, File sourceFileName)
2. copyFileSafe(File in, File out)
3. copyFilesBinary(String srcFile, String destDir)
4. copyFilesBinaryRecursively(File fromLocation, File toLocation, FileFilter fileFilter)
5. copyFilesFromDirToDir(String originalDir, String targetDir)
6. copyFilesToLocal(String destination, String source)