Example usage for java.nio.file Files walkFileTree

Introduction

In this page you can find the example usage for java.nio.file Files walkFileTree.

Prototype

public static Path walkFileTree(Path start, Set<FileVisitOption> options, int maxDepth,
        FileVisitor<? super Path> visitor) throws IOException 

Source Link

Document

Walks a file tree.

Usage

From source file:Test.java

public static void main(String[] args) {
    try {/* w  ww .  j  a v a 2s .  c o m*/
        Path source = Paths.get("/home");
        Path target = Paths.get("/backup");
        Files.walkFileTree(source, EnumSet.of(FileVisitOption.FOLLOW_LINKS), Integer.MAX_VALUE,
                new CopyDirectory(source, target));
    } catch (IOException ex) {
        ex.printStackTrace();
    }
}

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From source file:Search.java

public static void main(String[] args) throws IOException {

    Path searchFile = Paths.get("Demo.jpg");
    Search walk = new Search(searchFile);
    EnumSet<FileVisitOption> opts = EnumSet.of(FileVisitOption.FOLLOW_LINKS);

    Iterable<Path> dirs = FileSystems.getDefault().getRootDirectories();
    for (Path root : dirs) {
        if (!walk.found) {
            Files.walkFileTree(root, opts, Integer.MAX_VALUE, walk);
        }/* w  ww . j  a v  a2s  .  com*/
    }

    if (!walk.found) {
        System.out.println("The file " + searchFile + " was not found!");
    }
}

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From source file:com.github.houbin217jz.thumbnail.Thumbnail.java

public static void main(String[] args) {

    Options options = new Options();
    options.addOption("s", "src", true,
            "????????????");
    options.addOption("d", "dst", true, "");
    options.addOption("r", "ratio", true, "/??, 30%???0.3????????");
    options.addOption("w", "width", true, "(px)");
    options.addOption("h", "height", true, "?(px)");
    options.addOption("R", "recursive", false, "???????");

    HelpFormatter formatter = new HelpFormatter();
    String formatstr = "java -jar thumbnail.jar " + "[-s/--src <path>] " + "[-d/--dst <path>] "
            + "[-r/--ratio double] " + "[-w/--width integer] " + "[-h/--height integer] " + "[-R/--recursive] ";

    CommandLineParser parser = new PosixParser();
    CommandLine cmd = null;/*from   w  w w  .  j  a v  a 2s  . c  o m*/
    try {
        cmd = parser.parse(options, args);
    } catch (ParseException e1) {
        formatter.printHelp(formatstr, options);
        return;
    }

    final Path srcDir, dstDir;
    final Integer width, height;
    final Double ratio;

    //
    if (cmd.hasOption("s")) {
        srcDir = Paths.get(cmd.getOptionValue("s")).toAbsolutePath();
    } else {
        srcDir = Paths.get("").toAbsolutePath(); //??
    }

    //
    if (cmd.hasOption("d")) {
        dstDir = Paths.get(cmd.getOptionValue("d")).toAbsolutePath();
    } else {
        formatter.printHelp(formatstr, options);
        return;
    }

    if (!Files.exists(srcDir, LinkOption.NOFOLLOW_LINKS)
            || !Files.isDirectory(srcDir, LinkOption.NOFOLLOW_LINKS)) {
        System.out.println("[" + srcDir.toAbsolutePath() + "]??????");
        return;
    }

    if (Files.exists(dstDir, LinkOption.NOFOLLOW_LINKS)) {
        if (!Files.isDirectory(dstDir, LinkOption.NOFOLLOW_LINKS)) {
            //????????
            System.out.println("????????");
            return;
        }
    } else {
        //????????
        try {
            Files.createDirectories(dstDir);
        } catch (IOException e) {
            e.printStackTrace();
            return;
        }
    }

    //??
    if (cmd.hasOption("w") && cmd.hasOption("h")) {
        try {
            width = Integer.valueOf(cmd.getOptionValue("width"));
            height = Integer.valueOf(cmd.getOptionValue("height"));
        } catch (NumberFormatException e) {
            System.out.println("??????");
            return;
        }
    } else {
        width = null;
        height = null;
    }

    //?
    if (cmd.hasOption("r")) {
        try {
            ratio = Double.valueOf(cmd.getOptionValue("r"));
        } catch (NumberFormatException e) {
            System.out.println("?????");
            return;
        }
    } else {
        ratio = null;
    }

    if (width != null && ratio != null) {
        System.out.println("??????????????");
        return;
    }

    if (width == null && ratio == null) {
        System.out.println("????????????");
        return;
    }

    //
    int maxDepth = 1;
    if (cmd.hasOption("R")) {
        maxDepth = Integer.MAX_VALUE;
    }

    try {
        //Java 7 ??@see http://docs.oracle.com/javase/jp/7/api/java/nio/file/Files.html
        Files.walkFileTree(srcDir, EnumSet.of(FileVisitOption.FOLLOW_LINKS), maxDepth,
                new SimpleFileVisitor<Path>() {
                    @Override
                    public FileVisitResult visitFile(Path path, BasicFileAttributes basicFileAttributes)
                            throws IOException {

                        //???&???
                        String filename = path.getFileName().toString().toLowerCase();

                        if (filename.endsWith(".jpg") || filename.endsWith(".jpeg")) {
                            //Jpeg??

                            /*
                             * relative??:
                             * rootPath: /a/b/c/d
                             * filePath: /a/b/c/d/e/f.jpg
                             * rootPath.relativize(filePath) = e/f.jpg
                             */

                            /*
                             * resolve??
                             * rootPath: /a/b/c/output
                             * relativePath: e/f.jpg
                             * rootPath.resolve(relativePath) = /a/b/c/output/e/f.jpg
                             */

                            Path dst = dstDir.resolve(srcDir.relativize(path));

                            if (!Files.exists(dst.getParent(), LinkOption.NOFOLLOW_LINKS)) {
                                Files.createDirectories(dst.getParent());
                            }
                            doResize(path.toFile(), dst.toFile(), width, height, ratio);
                        }
                        return FileVisitResult.CONTINUE;
                    }
                });
    } catch (IOException e) {
        e.printStackTrace();
    }
}

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From source file:com.elemenopy.backupcopy.filesystem.WatcherManager.java

public static void init(BackupConfig config) throws IOException {
    backupConfig = config;// ww w . j a  va  2s  .com

    for (RootFolder rootFolder : config.getRootFolders()) {

        WatchService watcher = fileSystem.newWatchService();

        //start monitoring the source folder
        TaskManager.runTask(new WatcherTask(rootFolder, watcher));

        TaskManager.runTask(() -> {
            //traverse the source folder tree, registering subfolders on the watcher
            final WatcherRegisteringFileVisitor visitor = new WatcherRegisteringFileVisitor(rootFolder,
                    watcher);

            try {
                EnumSet<FileVisitOption> opts = EnumSet.of(FOLLOW_LINKS);
                Files.walkFileTree(fileSystem.getPath(rootFolder.getPath()), opts, Integer.MAX_VALUE, visitor);
            } catch (IOException ex) {
                logger.error("Error while setting up directory watchers", ex);
            }
        });
    }

}

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From source file:services.ImportExportService.java

public static List<DatabaseImage> findImportables(Path path) {
    final List<DatabaseImage> importable = new LinkedList<DatabaseImage>();
    try {//from  w w w  .  j  a va 2  s.  co m
        Files.walkFileTree(path, EnumSet.of(FileVisitOption.FOLLOW_LINKS), Integer.MAX_VALUE,
                new SimpleFileVisitor<Path>() {
                    @Override
                    public FileVisitResult visitFile(Path path, BasicFileAttributes attrs) throws IOException {
                        if (PathService.isImage(path)) {
                            DatabaseImage image = DatabaseImage.forPath(path);
                            if (hasFileToImport(image) && !image.imported) {
                                importable.add(image);
                            }
                        }
                        return FileVisitResult.CONTINUE;
                    }
                });
    } catch (IOException io) {
        io.printStackTrace();
        return importable;
    }
    return importable;
}

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From source file:com.elemenopy.backupcopy.filesystem.RootFolderSynchronizer.java

public void synchronize() throws IOException {
    Path sourceRoot = fileSystem.getPath(sourceRootFolder.getPath());
    if (!sourceRoot.toFile().isDirectory()) {
        throw new IllegalArgumentException("Source path " + sourceRootFolder.getPath() + " is not a directory");
    }//from   w  ww  .  java  2s  . c om
    EnumSet<FileVisitOption> opts = EnumSet.of(FOLLOW_LINKS);
    Files.walkFileTree(sourceRoot, opts, Integer.MAX_VALUE, new SyncingFileVisitor(sourceRoot, destination));
}

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From source file:org.sonar.core.util.FileUtils.java

private static void cleanDirectoryImpl(Path path) throws IOException {
    checkArgument(path.toFile().isDirectory(), "'%s' is not a directory", path);

    Files.walkFileTree(path, FOLLOW_LINKS, CleanDirectoryFileVisitor.VISIT_MAX_DEPTH,
            new CleanDirectoryFileVisitor(path));
}

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From source file:org.esa.nest.util.FileIOUtils.java

public static void copyFolder(final Path source, final Path target) throws IOException {
    // follow links when copying files
    final EnumSet<FileVisitOption> opts = EnumSet.of(FileVisitOption.FOLLOW_LINKS);
    final CopyDirVisitor tc = new CopyDirVisitor(source, target, false);
    Files.walkFileTree(source, opts, Integer.MAX_VALUE, tc);
}

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From source file:de.thomasbolz.renamer.Renamer.java

/**
 * Step 1 of the renaming process://from   w ww  . j a  va2  s . c om
 * Analysis steps in the renaming process. Walks the whole file tree of the source directory and creates a CopyTask
 * for each file or directory that is found and does not match the exclusion list.
 * @return a list of all CopyTasks
 */
public Map<Path, List<CopyTask>> prepareCopyTasks() {

    try {
        Files.walkFileTree(source, EnumSet.of(FileVisitOption.FOLLOW_LINKS), Integer.MAX_VALUE,
                new SimpleFileVisitor<Path>() {

                    /**
                     * If we find a directory create/copy it and add a counter
                     *
                     * @param dir
                     * @param attrs
                     * @return
                     * @throws java.io.IOException
                     */
                    @Override
                    public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs)
                            throws IOException {
                        Path targetdir = target.resolve(source.relativize(dir));
                        copyTasks.put(dir, new ArrayList<CopyTask>());
                        return FileVisitResult.CONTINUE;
                    }

                    @Override
                    public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                        if (!file.getFileName().toString().toLowerCase().matches(EXLUSION_REGEX)) {
                            copyTasks.get(file.getParent()).add(new CopyTask(file, null));
                        } else {
                            excludedFiles.add(file);
                        }
                        return FileVisitResult.CONTINUE;
                    }
                });
    } catch (IOException e) {
        e.printStackTrace();
    }
    sortCopyTasks();
    //        generateTargetFilenames();
    return copyTasks;
}

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From source file:org.sonar.process.FileUtils.java

private static void cleanDirectoryImpl(Path path) throws IOException {
    if (!path.toFile().isDirectory()) {
        throw new IllegalArgumentException(format("'%s' is not a directory", path));
    }/*from ww  w . j  ava 2  s  . c  om*/
    Files.walkFileTree(path, FOLLOW_LINKS, CleanDirectoryFileVisitor.VISIT_MAX_DEPTH,
            new CleanDirectoryFileVisitor(path));
}

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