Java Delete Directory deleteDirectory(File directory)

Description

delete Directory

License

Open Source License

Declaration

public static void deleteDirectory(File directory) throws IOException 

Method Source Code

//package com.java2s;
/*//from   w w w.  j a  v  a2  s.co  m
 * Hello Minecraft!.
 * Copyright (C) 2013  huangyuhui <huanghongxun2008@126.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see {http://www.gnu.org/licenses/}.
 */

import java.io.File;

import java.io.FileNotFoundException;

import java.io.IOException;

public class Main {
    public static void deleteDirectory(File directory) throws IOException {
        if (!directory.exists())
            return;

        if (!isSymlink(directory))
            cleanDirectory(directory);

        if (!directory.delete()) {
            String message = "Unable to delete directory " + directory + ".";

            throw new IOException(message);
        }
    }

    public static boolean isSymlink(File file) throws IOException {
        if (file == null)
            throw new NullPointerException("File must not be null");
        if (File.separatorChar == '\\')
            return false;
        File fileInCanonicalDir;
        if (file.getParent() == null)
            fileInCanonicalDir = file;
        else {
            File canonicalDir = file.getParentFile().getCanonicalFile();
            fileInCanonicalDir = new File(canonicalDir, file.getName());
        }

        return !fileInCanonicalDir.getCanonicalFile().equals(fileInCanonicalDir.getAbsoluteFile());
    }

    public static void cleanDirectory(File directory) throws IOException {
        if (!directory.exists()) {
            directory.mkdirs();
            return;
        }

        if (!directory.isDirectory()) {
            String message = directory + " is not a directory";
            throw new IllegalArgumentException(message);
        }

        File[] files = directory.listFiles();
        if (files == null)
            throw new IOException("Failed to list contents of " + directory);

        IOException exception = null;
        for (File file : files)
            try {
                forceDelete(file);
            } catch (IOException ioe) {
                exception = ioe;
            }

        if (null != exception)
            throw exception;
    }

    public static String getName(String filename) {
        if (filename == null)
            return null;
        int index = indexOfLastSeparator(filename);
        return filename.substring(index + 1);
    }

    public static void forceDelete(File file) throws IOException {
        if (file.isDirectory())
            deleteDirectory(file);
        else {
            boolean filePresent = file.exists();
            if (!file.delete()) {
                if (!filePresent)
                    throw new FileNotFoundException("File does not exist: " + file);
                String message = "Unable to delete file: " + file;

                throw new IOException(message);
            }
        }
    }

    public static int indexOfLastSeparator(String filename) {
        if (filename == null)
            return -1;
        int lastUnixPos = filename.lastIndexOf(47);
        int lastWindowsPos = filename.lastIndexOf(92);
        return Math.max(lastUnixPos, lastWindowsPos);
    }
}

Related

1. deleteDirectory(File dir, boolean isInitialDelete)
2. deleteDirectory(File dir, boolean recursive)
3. deleteDirectory(File dir, Map preserve)
4. deleteDirectory(File directory)
5. deleteDirectory(File directory)
6. deleteDirectory(File directory)
7. deleteDirectory(File directory)
8. deleteDirectory(File directory)
9. deleteDirectory(File directory)