Moves a directory to another directory. - Java File Path IO

Java examples for File Path IO:Directory Move

Description

Moves a directory to another directory.

Demo Code

/*//from   w w  w . j av  a  2s . co  m
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.Closeable;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.channels.FileChannel;
import java.util.ArrayList;
import java.util.List;

public class Main{
    public static void main(String[] argv) throws Exception{
        File src = new File("Main.java");
        File destDir = new File("Main.java");
        boolean createDestDir = true;
        moveDirectoryToDirectory(src,destDir,createDestDir);
    }
    /**
     * Moves a directory to another directory.
     *
     * @param src the file to be moved
     * @param destDir the destination file
     * @param createDestDir If <code>true</code> create the destination directory,
     * otherwise if <code>false</code> throw an IOException
     * @throws NullPointerException if source or destination is <code>null</code>
     * @throws FileExistsException if the directory exists in the destination directory
     * @throws IOException if source or destination is invalid
     * @throws IOException if an IO error occurs moving the file
     * @since Commons IO 1.4
     */
    private static void moveDirectoryToDirectory(File src, File destDir,
            boolean createDestDir) throws IOException {
        if (src == null) {
            throw new NullPointerException("Source must not be null");
        }
        if (destDir == null) {
            throw new NullPointerException(
                    "Destination directory must not be null");
        }
        if (!destDir.exists() && createDestDir) {
            destDir.mkdirs();
        }
        if (!destDir.exists()) {
            throw new FileNotFoundException("Destination directory '"
                    + destDir + "' does not exist [createDestDir="
                    + createDestDir + "]");
        }
        if (!destDir.isDirectory()) {
            throw new IOException("Destination '" + destDir
                    + "' is not a directory");
        }
        moveDirectory(src, new File(destDir, src.getName()));

    }
    /**
     * Moves a directory.
     * <p>
     * When the destination directory is on another file system, do a "copy and delete".
     *
     * @param srcDir the directory to be moved
     * @param destDir the destination directory
     * @throws NullPointerException if source or destination is <code>null</code>
     * @throws IOException if the destination directory exists
     * @throws IOException if source or destination is invalid
     * @throws IOException if an IO error occurs moving the file
     * @since Commons IO 1.4
     */
    public static void moveDirectory(File srcDir, File destDir)
            throws IOException {
        if (srcDir == null) {
            throw new NullPointerException("Source must not be null");
        }
        if (destDir == null) {
            throw new NullPointerException("Destination must not be null");
        }
        if (!srcDir.exists()) {
            throw new FileNotFoundException("Source '" + srcDir
                    + "' does not exist");
        }
        if (!srcDir.isDirectory()) {
            throw new IOException("Source '" + srcDir
                    + "' is not a directory");
        }
        if (destDir.exists()) {
            throw new IOException("Destination '" + destDir
                    + "' already exists");
        }
        boolean rename = srcDir.renameTo(destDir);
        if (!rename) {
            copyDirectory(srcDir, destDir);
            deleteDirectory(srcDir);
            if (srcDir.exists()) {
                throw new IOException(
                        "Failed to delete original directory '" + srcDir
                                + "' after copy to '" + destDir + "'");
            }
        }
    }
    /**
     * Copies a whole directory to a new location preserving the file dates.
     * <p>
     * This method copies the specified directory and all its child
     * directories and files to the specified destination.
     * The destination is the new location and name of the directory.
     * <p>
     * The destination directory is created if it does not exist.
     * If the destination directory did exist, then this method merges
     * the source with the destination, with the source taking precedence.
     * <p>
     * <strong>Note:</strong> This method tries to preserve the files' last
     * modified date/times using {@link File#setLastModified(long)}, however
     * it is not guaranteed that those operations will succeed.
     * If the modification operation fails, no indication is provided.
     *
     * @param srcDir  an existing directory to copy, must not be <code>null</code>
     * @param destDir  the new directory, must not be <code>null</code>
     *
     * @throws NullPointerException if source or destination is <code>null</code>
     * @throws IOException if source or destination is invalid
     * @throws IOException if an IO error occurs during copying
     * @since Commons IO 1.1
     */
    public static void copyDirectory(File srcDir, File destDir)
            throws IOException {
        copyDirectory(srcDir, destDir, true);
    }
    /**
     * Copies a whole directory to a new location.
     * <p>
     * This method copies the contents of the specified source directory
     * to within the specified destination directory.
     * <p>
     * The destination directory is created if it does not exist.
     * If the destination directory did exist, then this method merges
     * the source with the destination, with the source taking precedence.
     * <p>
     * <strong>Note:</strong> Setting <code>preserveFileDate</code> to
     * <code>true</code> tries to preserve the files' last modified
     * date/times using {@link File#setLastModified(long)}, however it is
     * not guaranteed that those operations will succeed.
     * If the modification operation fails, no indication is provided.
     *
     * @param srcDir  an existing directory to copy, must not be <code>null</code>
     * @param destDir  the new directory, must not be <code>null</code>
     * @param preserveFileDate  true if the file date of the copy
     *  should be the same as the original
     *
     * @throws NullPointerException if source or destination is <code>null</code>
     * @throws IOException if source or destination is invalid
     * @throws IOException if an IO error occurs during copying
     * @since Commons IO 1.1
     */
    private static void copyDirectory(File srcDir, File destDir,
            boolean preserveFileDate) throws IOException {
        copyDirectory(srcDir, destDir, null, preserveFileDate);
    }
    /**
     * Copies a filtered directory to a new location.
     * <p>
     * This method copies the contents of the specified source directory
     * to within the specified destination directory.
     * <p>
     * The destination directory is created if it does not exist.
     * If the destination directory did exist, then this method merges
     * the source with the destination, with the source taking precedence.
     * <p>
     * <strong>Note:</strong> Setting <code>preserveFileDate</code> to
     * <code>true</code> tries to preserve the files' last modified
     * date/times using {@link File#setLastModified(long)}, however it is
     * not guaranteed that those operations will succeed.
     * If the modification operation fails, no indication is provided.
     *
     * <h4>Example: Copy directories only</h4> 
     *  <pre>
     *  // only copy the directory structure
     *  FileUtils.copyDirectory(srcDir, destDir, DirectoryFileFilter.DIRECTORY, false);
     *  </pre>
     *
     * <h4>Example: Copy directories and txt files</h4>
     *  <pre>
     *  // Create a filter for ".txt" files
     *  IOFileFilter txtSuffixFilter = FileFilterUtils.suffixFileFilter(".txt");
     *  IOFileFilter txtFiles = FileFilterUtils.andFileFilter(FileFileFilter.FILE, txtSuffixFilter);
     *
     *  // Create a filter for either directories or ".txt" files
     *  FileFilter filter = FileFilterUtils.orFileFilter(DirectoryFileFilter.DIRECTORY, txtFiles);
     *
     *  // Copy using the filter
     *  FileUtils.copyDirectory(srcDir, destDir, filter, false);
     *  </pre>
     * 
     * @param srcDir  an existing directory to copy, must not be <code>null</code>
     * @param destDir  the new directory, must not be <code>null</code>
     * @param filter  the filter to apply, null means copy all directories and files
     * @param preserveFileDate  true if the file date of the copy
     *  should be the same as the original
     *
     * @throws NullPointerException if source or destination is <code>null</code>
     * @throws IOException if source or destination is invalid
     * @throws IOException if an IO error occurs during copying
     * @since Commons IO 1.4
     */
    private static void copyDirectory(File srcDir, File destDir,
            FileFilter filter, boolean preserveFileDate) throws IOException {
        if (srcDir == null) {
            throw new NullPointerException("Source must not be null");
        }
        if (destDir == null) {
            throw new NullPointerException("Destination must not be null");
        }
        if (srcDir.exists() == false) {
            throw new FileNotFoundException("Source '" + srcDir
                    + "' does not exist");
        }
        if (srcDir.isDirectory() == false) {
            throw new IOException("Source '" + srcDir
                    + "' exists but is not a directory");
        }
        if (srcDir.getCanonicalPath().equals(destDir.getCanonicalPath())) {
            throw new IOException("Source '" + srcDir
                    + "' and destination '" + destDir + "' are the same");
        }

        // Cater for destination being directory within the source directory (see IO-141)
        List<String> exclusionList = null;
        if (destDir.getCanonicalPath()
                .startsWith(srcDir.getCanonicalPath())) {
            File[] srcFiles = filter == null ? srcDir.listFiles() : srcDir
                    .listFiles(filter);
            if (srcFiles != null && srcFiles.length > 0) {
                exclusionList = new ArrayList<String>(srcFiles.length);
                for (File srcFile : srcFiles) {
                    File copiedFile = new File(destDir, srcFile.getName());
                    exclusionList.add(copiedFile.getCanonicalPath());
                }
            }
        }
        doCopyDirectory(srcDir, destDir, filter, preserveFileDate,
                exclusionList);
    }
    /**
     * Deletes a directory recursively. 
     *
     * @param directory  directory to delete
     * @throws IOException in case deletion is unsuccessful
     */
    public static void deleteDirectory(File directory) throws IOException {
        if (!directory.exists()) {
            return;
        }

        if (!directory.delete()) {
            String message = "Unable to delete directory " + directory
                    + ".";
            throw new IOException(message);
        }
    }
    /**
     * Internal copy directory method.
     * 
     * @param srcDir  the validated source directory, must not be <code>null</code>
     * @param destDir  the validated destination directory, must not be <code>null</code>
     * @param filter  the filter to apply, null means copy all directories and files
     * @param preserveFileDate  whether to preserve the file date
     * @param exclusionList  List of files and directories to exclude from the copy, may be null
     * @throws IOException if an error occurs
     * @since Commons IO 1.1
     */
    private static void doCopyDirectory(File srcDir, File destDir,
            FileFilter filter, boolean preserveFileDate,
            List<String> exclusionList) throws IOException {
        // recurse
        File[] srcFiles = filter == null ? srcDir.listFiles() : srcDir
                .listFiles(filter);
        if (srcFiles == null) { // null if abstract pathname does not denote a directory, or if an I/O error occurs
            throw new IOException("Failed to list contents of " + srcDir);
        }
        if (destDir.exists()) {
            if (destDir.isDirectory() == false) {
                throw new IOException("Destination '" + destDir
                        + "' exists but is not a directory");
            }
        } else {
            if (!destDir.mkdirs() && !destDir.isDirectory()) {
                throw new IOException("Destination '" + destDir
                        + "' directory cannot be created");
            }
        }
        if (destDir.canWrite() == false) {
            throw new IOException("Destination '" + destDir
                    + "' cannot be written to");
        }
        for (File srcFile : srcFiles) {
            File dstFile = new File(destDir, srcFile.getName());
            if (exclusionList == null
                    || !exclusionList.contains(srcFile.getCanonicalPath())) {
                if (srcFile.isDirectory()) {
                    doCopyDirectory(srcFile, dstFile, filter,
                            preserveFileDate, exclusionList);
                } else {
                    doCopyFile(srcFile, dstFile, preserveFileDate);
                }
            }
        }

        // Do this last, as the above has probably affected directory metadata
        if (preserveFileDate) {
            destDir.setLastModified(srcDir.lastModified());
        }
    }
}

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