Java Delete File Recursively deleteRecursively(final File directory)

Description

delete Recursively

License

Apache License

Declaration

public static void deleteRecursively(final File directory) throws IOException

Method Source Code

//package com.java2s;
/*//  ww w. j av a 2s . c  o 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.File;

import java.io.IOException;

import java.util.LinkedList;
import java.util.List;
import java.util.Stack;

public class Main {
    private static int WINDOWS_RETRY_COUNT = 3;

    public static void deleteRecursively(final File directory) throws IOException {
        final Stack<File> stack = new Stack<>();
        final List<File> temp = new LinkedList<>();
        stack.push(directory.getAbsoluteFile());
        while (!stack.isEmpty()) {
            final File top = stack.pop();
            File[] files = top.listFiles();
            if (files != null) {
                for (final File child : files) {
                    if (child.isFile()) {
                        if (!deleteFile(child)) {
                            throw new IOException("Failed to delete " + child.getCanonicalPath());
                        }
                    } else {
                        temp.add(child);
                    }
                }
            }
            files = top.listFiles();
            if ((files == null) || (files.length == 0)) {
                if (!deleteFile(top)) {
                    throw new IOException("Failed to delete " + top.getCanonicalPath());
                }
            } else {
                stack.push(top);
                for (final File f : temp) {
                    stack.push(f);
                }
            }
            temp.clear();
        }
    }

    public static boolean deleteFile(final File file) {
        if (!file.exists()) {
            return true;
        }
        int count = 0;
        boolean deleted;
        do {
            deleted = file.delete();
            if (!deleted) {
                count++;
                waitSome();
            }
        } while (!deleted && (count <= WINDOWS_RETRY_COUNT));
        return deleted;
    }

    private static void waitSome() {
        try {
            Thread.sleep(500);
        } catch (final InterruptedException ee) {
            Thread.interrupted();
        } // ok
        System.gc();
    }
}

Java Delete File Recursively deleteRecursively(final File directory)

Description

License

Declaration

Method Source Code

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