使用文件获取文件属性

//来 自 时代Java - nowjava.com

import java.io.File;

import java.io.IOException;

import java.nio.file.*;

import java.util.Dictionary;



public class FilesandDictionaries {

    public static void main(String[] args) {

        Path path = Paths.get("CP1", "test.txt");

        System.out.println(Files.exists(path,

                new LinkOption[] { LinkOption.NOFOLLOW_LINKS }));


        Path notexistpath = FileSystems.getDefault().getPath("CP4",

                "test.txt");

        System.out.println(Files.notExists(notexistpath));


        //Properties

        System.out.println(Files.isExecutable(path));

        System.out.println(Files.isReadable(path));

        System.out.println(Files.isWritable(path));

        System.out.println(Files.isRegularFile(path,//来自 nowjava.com

                LinkOption.NOFOLLOW_LINKS));


        //check same file, hidden file

        Path samepath = Paths.get("CP1", "test.txt");

        try {

            System.out.println(Files.isSameFile(path, samepath));

            System.out.println(Files.isHidden(path));

        } catch (IOException e) {

            e.printStackTrace();

        }


        //List filesystem root dictionaries

        Iterable<Path> dirs = FileSystems.getDefault().getRootDirectories();

        for (Path name : dirs) {

            System.out.println(name);

        }


        //Old Java 6 way to show files


        File[] roots = File.listRoots();

        for (File f : roots) {

            System.out.println(f);

        }

        System.out.println("\nBefore adding a filter");

        //Create a new dic

        Path newpath = FileSystems.getDefault().getPath("C:/path.txt");

        try {

            Files.createFile(newpath);

        } catch (IOException e) {

            e.printStackTrace();

        }


        //List the content of folder

        Path foldercontent = Paths.get("C:/");

        try (DirectoryStream<Path> ds = Files

                .newDirectoryStream(foldercontent)) {

            for (Path f : ds) {

                System.out.println(f.getFileName());//API. getFileName()

            }

        } catch (IOException e) {

            System.err.println(e);

        }


        System.out.println("\nAfter adding a filter");

        //Define a filter

        DirectoryStream.Filter<Path> dir_filter = new DirectoryStream.Filter<Path>() {