Java Directory Clear cleanDirectory(File directory)

Description

clean Directory

License

Open Source License

Declaration

public static void cleanDirectory(File directory) throws IOException 

Method Source Code

//package com.java2s;
/*/*from  w  ww .j a  v  a 2s  .c o 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 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 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 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());
    }
}

Related

1. cleanDirectory(File dir, boolean deleteDirectory)
2. cleanDirectory(File directory)
3. cleanDirectory(File directory)
4. cleanDirectory(File directory)
5. cleanDirectory(File directory)
6. cleanDirectory(File directory)
7. cleanDirectory(File directory)
8. cleanDirectory(File directory)
9. cleanDirectory(File path)