获取文件权限

/*

 * Copyright 2014 The Codehaus Foundation.

 *

 * 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.

 */

//package com.nowjava;

import javax.annotation.Nonnull;

/*
来 自*
 时 代 J a v a 公 众 号
*/

import java.nio.file.attribute.PosixFilePermission;

import java.util.HashSet;

import java.util.Set;


public class Main {

    public static void main(String[] argv) throws Exception {

        int mode = 2;

        System.out.println(getPermissions(mode));

    }
//来自 n o w  j a v a  . c o m

    @Nonnull

    public static Set<PosixFilePermission> getPermissions(int mode) {

        Set<PosixFilePermission> perms = new HashSet<PosixFilePermission>();

        //add owners permission

        if ((mode & 0400) > 0) {

            perms.add(PosixFilePermission.OWNER_READ);

        }

        if ((mode & 0200) > 0) {

            perms.add(PosixFilePermission.OWNER_WRITE);

        }

        if ((mode & 0100) > 0) {

            perms.add(PosixFilePermission.OWNER_EXECUTE);

        }

        //add group permissions

        if ((mode & 0040) > 0) {

            perms.add(PosixFilePermission.GROUP_READ);

        }

        if ((mode & 0020) > 0) {

            perms.add(PosixFilePermission.GROUP_WRITE);

        }

        if ((mode & 0010) > 0) {

            perms.add(PosixFilePermission.GROUP_EXECUTE);

        }