Java DirectoryStream類代碼示例

import java.nio.file.DirectoryStream; //導入依賴的package包/類
private static void z2zmove(FileSystem src, FileSystem dst, String path)
    throws IOException
{
    Path srcPath = src.getPath(path);
    Path dstPath = dst.getPath(path);

    if (Files.isDirectory(srcPath)) {
        if (!Files.exists(dstPath))
            mkdirs(dstPath);
        try (DirectoryStream<Path> ds = Files.newDirectoryStream(srcPath)) {
            for (Path child : ds) {
                z2zmove(src, dst,
                        path + (path.endsWith("/")?"":"/") + child.getFileName());
            }
        }
    } else {
        //System.out.println("moving..." + path);
        Path parent = dstPath.getParent();
        if (parent != null && Files.notExists(parent))
            mkdirs(parent);
        Files.move(srcPath, dstPath);
    }
}
 

import java.nio.file.DirectoryStream; //導入依賴的package包/類
@Override
public String[] children(String f) {
    Path p = getPath(f);
    try (DirectoryStream<Path> dir = Files.newDirectoryStream(p)){
        java.util.List<String> result = new ArrayList<>();
        for (Path child : dir) {
            String name = child.getName(child.getNameCount() - 1).toString();
            if (name.endsWith("/"))
                name = name.substring(0, name.length() - 1);
            result.add(name);
        }

        return result.toArray(new String[result.size()]);
    } catch (IOException ex) {
        return new String[0]; //huh?
    }
}
 

import java.nio.file.DirectoryStream; //導入依賴的package包/類
public static void deleteHeapTempFiles() {
    if (Platform.isWindows()) { // this is workaroud for JDK bug #6359560

        try {
            File tempDir = new File(System.getProperty("java.io.tmpdir")); // NOI18N
            DirectoryStream<Path> files = Files.newDirectoryStream(tempDir.toPath());

            try {
                for (Path p : files) {
                    String fname = p.toFile().getName();

                    if (fname.startsWith("NBProfiler") && (fname.endsWith(".map") || fname.endsWith(".ref") || fname.endsWith(".gc"))) { // NOI18N
                        Files.delete(p);
                    }
                }
            } finally {
                files.close();
            }
        } catch (IOException ex) {
            System.err.println("deleteHeapTempFiles failed");   // NOI18N
            ex.printStackTrace();
        }
    }
}
 

import java.nio.file.DirectoryStream; //導入依賴的package包/類
/**
 * Recurse down a directory tree, checking all child directories.
 * @param dir
 * @throws DiskErrorException
 */
public static void checkDirs(File dir) throws DiskErrorException {
  checkDir(dir);
  IOException ex = null;
  try (DirectoryStream<java.nio.file.Path> stream =
      Files.newDirectoryStream(dir.toPath())) {
    for (java.nio.file.Path entry: stream) {
      File child = entry.toFile();
      if (child.isDirectory()) {
        checkDirs(child);
      }
    }
  } catch (DirectoryIteratorException de) {
    ex = de.getCause();
  } catch (IOException ie) {
    ex = ie;
  }
  if (ex != null) {
    throw new DiskErrorException("I/O error when open a directory: "
        + dir.toString(), ex);
  }
}
 

import java.nio.file.DirectoryStream; //導入依賴的package包/類
/**
 * Return the complete list of files in a directory as strings.<p/>
 *
 * This is better than File#listDir because it does not ignore IOExceptions.
 *
 * @param dir              The directory to list.
 * @param filter           If non-null, the filter to use when listing
 *                         this directory.
 * @return                 The list of files in the directory.
 *
 * @throws IOException     On I/O error
 */
public static List<String> listDirectory(File dir, FilenameFilter filter)
    throws IOException {
  ArrayList<String> list = new ArrayList<String> ();
  try (DirectoryStream<Path> stream =
           Files.newDirectoryStream(dir.toPath())) {
    for (Path entry: stream) {
      String fileName = entry.getFileName().toString();
      if ((filter == null) || filter.accept(dir, fileName)) {
        list.add(fileName);
      }
    }
  } catch (DirectoryIteratorException e) {
    throw e.getCause();
  }
  return list;
}
 

import java.nio.file.DirectoryStream; //導入依賴的package包/類
/**
 * Scans the hunspell directory and loads all found dictionaries
 */
private void scanAndLoadDictionaries() throws IOException {
    if (Files.isDirectory(hunspellDir)) {
        try (DirectoryStream<Path> stream = Files.newDirectoryStream(hunspellDir)) {
            for (Path file : stream) {
                if (Files.isDirectory(file)) {
                    try (DirectoryStream<Path> inner = Files.newDirectoryStream(hunspellDir.resolve(file), "*.dic")) {
                        if (inner.iterator().hasNext()) { // just making sure it's indeed a dictionary dir
                            try {
                                dictionaries.getUnchecked(file.getFileName().toString());
                            } catch (UncheckedExecutionException e) {
                                // The cache loader throws unchecked exception (see #loadDictionary()),
                                // here we simply report the exception and continue loading the dictionaries
                                logger.error("exception while loading dictionary {}", file.getFileName(), e);
                            }
                        }
                    }
                }
            }
        }
    }
}
 

import java.nio.file.DirectoryStream; //導入依賴的package包/類
private List<Path> getClassPaths(String cpaths) {
    if (cpaths.isEmpty()) {
        return Collections.emptyList();
    }
    List<Path> paths = new ArrayList<>();
    for (String p : cpaths.split(File.pathSeparator)) {
        if (p.length() > 0) {
            // wildcard to parse all JAR files e.g. -classpath dir/*
            int i = p.lastIndexOf(".*");
            if (i > 0) {
                Path dir = Paths.get(p.substring(0, i));
                try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir, "*.jar")) {
                    for (Path entry : stream) {
                        paths.add(entry);
                    }
                } catch (IOException e) {
                    throw new UncheckedIOException(e);
                }
            } else {
                paths.add(Paths.get(p));
            }
        }
    }
    return paths;
}
 

import java.nio.file.DirectoryStream; //導入依賴的package包/類
@Test
@SuppressWarnings("unchecked")
public void doNothingWhenPathCannotBeParsed() throws Exception {
  mockStatic(Files.class);

  when(validator.isValid(path)).thenReturn(true);

  DirectoryStream<Path> directoryStream = mock(DirectoryStream.class);
  when(Files.newDirectoryStream(path, "*.xml")).thenReturn(directoryStream);

  Iterator<Path> iterator = mock(Iterator.class);
  when(directoryStream.iterator()).thenReturn(iterator);

  when(iterator.hasNext()).thenReturn(true, false);
  Path file = mock(Path.class);
  when(iterator.next()).thenReturn(file);

  when(xmlParser.parseXml(file)).thenReturn(Optional.empty());

  scheduledFileReader.parseXmlFiles();

  verifyZeroInteractions(service);

  verifyStatic(Files.class);
  Files.newDirectoryStream(path, "*.xml");
}
 

import java.nio.file.DirectoryStream; //導入依賴的package包/類
@Override
public ImmutableMap<String, BlobMetaData> listBlobsByPrefix(String blobNamePrefix) throws IOException {
    // using MapBuilder and not ImmutableMap.Builder as it seems like File#listFiles might return duplicate files!
    MapBuilder<String, BlobMetaData> builder = MapBuilder.newMapBuilder();

    blobNamePrefix = blobNamePrefix == null ? "" : blobNamePrefix;
    try (DirectoryStream<Path> stream = Files.newDirectoryStream(path, blobNamePrefix + "*")) {
        for (Path file : stream) {
            final BasicFileAttributes attrs = Files.readAttributes(file, BasicFileAttributes.class);
            if (attrs.isRegularFile()) {
                builder.put(file.getFileName().toString(), new PlainBlobMetaData(file.getFileName().toString(), attrs.size()));
            }
        }
    }
    return builder.immutableMap();
}
 

import java.nio.file.DirectoryStream; //導入依賴的package包/類
/**
 * Returns the json files found within the directory provided as argument.
 * Files are looked up in the classpath, or optionally from {@code fileSystem} if its not null.
 */
public static Set<Path> findJsonSpec(FileSystem fileSystem, String optionalPathPrefix, String path) throws IOException {
    Path dir = resolveFile(fileSystem, optionalPathPrefix, path, null);

    if (!Files.isDirectory(dir)) {
        throw new NotDirectoryException(path);
    }

    Set<Path> jsonFiles = new HashSet<>();
    try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir)) {
        for (Path item : stream) {
            if (item.toString().endsWith(JSON_SUFFIX)) {
                jsonFiles.add(item);
            }
        }
    }

    if (jsonFiles.isEmpty()) {
        throw new NoSuchFileException(path, null, "no json files found");
    }

    return jsonFiles;
}
 

import java.nio.file.DirectoryStream; //導入依賴的package包/類
@Override
public List<Node> getChildren() {
    if (!isDirectory())
        throw new IllegalArgumentException("not a directory: " + getNameString());
    if (children == null) {
        List<Node> list = new ArrayList<>();
        try (DirectoryStream<Path> stream = Files.newDirectoryStream(path)) {
            for (Path p : stream) {
                p = explodedModulesDir.relativize(p);
                String pName = MODULES + nativeSlashToFrontSlash(p.toString());
                Node node = findNode(pName);
                if (node != null) {  // findNode may choose to hide certain files!
                    list.add(node);
                }
            }
        } catch (IOException x) {
            return null;
        }
        children = list;
    }
    return children;
}
 

import java.nio.file.DirectoryStream; //導入依賴的package包/類
/**
 * Returns all folder names in ${data.paths}/nodes/{node.id}/indices folder
 */
public Set<String> availableIndexFolders() throws IOException {
    if (nodePaths == null || locks == null) {
        throw new IllegalStateException("node is not configured to store local location");
    }
    assertEnvIsLocked();
    Set<String> indexFolders = new HashSet<>();
    for (NodePath nodePath : nodePaths) {
        Path indicesLocation = nodePath.indicesPath;
        if (Files.isDirectory(indicesLocation)) {
            try (DirectoryStream<Path> stream = Files.newDirectoryStream(indicesLocation)) {
                for (Path index : stream) {
                    if (Files.isDirectory(index)) {
                        indexFolders.add(index.getFileName().toString());
                    }
                }
            }
        }
    }
    return indexFolders;

}
 

import java.nio.file.DirectoryStream; //導入依賴的package包/類
private void cleanupOldFiles(final String prefix, final String currentStateFile, Path[] locations) throws IOException {
    final DirectoryStream.Filter<Path> filter = new DirectoryStream.Filter<Path>() {
        @Override
        public boolean accept(Path entry) throws IOException {
            final String entryFileName = entry.getFileName().toString();
            return Files.isRegularFile(entry)
                    && entryFileName.startsWith(prefix) // only state files
                    && currentStateFile.equals(entryFileName) == false; // keep the current state file around
        }
    };
    // now clean up the old files
    for (Path dataLocation : locations) {
        try (DirectoryStream<Path> stream = Files.newDirectoryStream(dataLocation.resolve(STATE_DIR_NAME), filter)) {
            for (Path stateFile : stream) {
                Files.deleteIfExists(stateFile);
            }
        }
    }
}
 

import java.nio.file.DirectoryStream; //導入依賴的package包/類
long findMaxStateId(final String prefix, Path... locations) throws IOException {
    long maxId = -1;
    for (Path dataLocation : locations) {
        final Path resolve = dataLocation.resolve(STATE_DIR_NAME);
        if (Files.exists(resolve)) {
            try (DirectoryStream<Path> stream = Files.newDirectoryStream(resolve, prefix + "*")) {
                for (Path stateFile : stream) {
                    final Matcher matcher = stateFilePattern.matcher(stateFile.getFileName().toString());
                    if (matcher.matches()) {
                        final long id = Long.parseLong(matcher.group(1));
                        maxId = Math.max(maxId, id);
                    }
                }
            }
        }
    }
    return maxId;
}
 

import java.nio.file.DirectoryStream; //導入依賴的package包/類
PollingWatchKey(Path dir, PollingWatchService watcher, Object fileKey)
    throws IOException
{
    super(dir, watcher);
    this.fileKey = fileKey;
    this.valid = true;
    this.tickCount = 0;
    this.entries = new HashMap<Path,CacheEntry>();

    // get the initial entries in the directory
    try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir)) {
        for (Path entry: stream) {
            // don't follow links
            long lastModified =
                Files.getLastModifiedTime(entry, LinkOption.NOFOLLOW_LINKS).toMillis();
            entries.put(entry.getFileName(), new CacheEntry(lastModified, tickCount));
        }
    } catch (DirectoryIteratorException e) {
        throw e.getCause();
    }
}