Java Delete File Recursively deleteRecursively(File file)

Description

delete Recursively

License

Apache License

Declaration

public static boolean deleteRecursively(File file)

Method Source Code


//package com.java2s;
/*// w  ww.  j  a v  a2  s.  co  m
 * Copyright 2010 Proofpoint, Inc.
 *
 * 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 com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;

import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;

public class Main {
    public static boolean deleteRecursively(File file) {
        boolean success = true;
        if (file.isDirectory()) {
            success = deleteDirectoryContents(file);
        }

        return file.delete() && success;
    }

    public static boolean deleteDirectoryContents(File directory) {
        Preconditions.checkArgument(directory.isDirectory(), "Not a directory: %s", directory);

        // Don't delete symbolic link directories
        if (isSymbolicLink(directory)) {
            return false;
        }

        boolean success = true;
        for (File file : listFiles(directory)) {
            success = deleteRecursively(file) && success;
        }
        return success;
    }

    public static boolean isSymbolicLink(File file) {
        try {
            File canonicalFile = file.getCanonicalFile();
            File absoluteFile = file.getAbsoluteFile();
            // a symbolic link has a different name between the canonical and absolute path
            return !canonicalFile.getName().equals(absoluteFile.getName()) ||
            // or the canonical parent path is not the same as the files parent path
                    !canonicalFile.getParent().equals(absoluteFile.getParentFile().getCanonicalPath());
        } catch (IOException e) {
            // error on the side of caution
            return true;
        }
    }

    public static ImmutableList<File> listFiles(File dir) {
        File[] files = dir.listFiles();
        if (files == null) {
            return ImmutableList.of();
        }
        return ImmutableList.copyOf(files);
    }

    public static ImmutableList<File> listFiles(File dir, FilenameFilter filter) {
        File[] files = dir.listFiles(filter);
        if (files == null) {
            return ImmutableList.of();
        }
        return ImmutableList.copyOf(files);
    }
}

Java Delete File Recursively deleteRecursively(File file)

Description

License

Declaration

Method Source Code

Related