Java Files.readAttributes方法代碼示例

import java.nio.file.Files; //導入方法依賴的package包/類
/**
 * Returns a file path to a resource in a file tree. If the resource
 * name has a trailing "/" then the file path will locate a directory.
 * Returns {@code null} if the resource does not map to a file in the
 * tree file.
 */
public static Path toFilePath(Path dir, String name) throws IOException {
    boolean expectDirectory = name.endsWith("/");
    if (expectDirectory) {
        name = name.substring(0, name.length() - 1);  // drop trailing "/"
    }
    Path path = toSafeFilePath(dir.getFileSystem(), name);
    if (path != null) {
        Path file = dir.resolve(path);
        try {
            BasicFileAttributes attrs;
            attrs = Files.readAttributes(file, BasicFileAttributes.class);
            if (attrs.isDirectory()
                || (!attrs.isDirectory() && !expectDirectory))
                return file;
        } catch (NoSuchFileException ignore) { }
    }
    return null;
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
@Override
public Map<String, BlobMetaData> listBlobsByPrefix(String blobNamePrefix) throws IOException {
    // If we get duplicate files we should just take the last entry
    Map<String, BlobMetaData> builder = new HashMap<>();

    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 unmodifiableMap(builder);
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
@Override
public boolean accept(Path path) throws IOException {
  if (!Files.isDirectory(path)) {
    return false;
  }

  if (!path.getFileName().toString().startsWith(TMP_NAME_PREFIX)) {
    return false;
  }

  long threshold = System.currentTimeMillis() - CLEAN_MAX_AGE;

  // we could also check the timestamp in the name, instead
  BasicFileAttributes attrs;

  try {
    attrs = Files.readAttributes(path, BasicFileAttributes.class);
  } catch (IOException ioe) {
    LOG.error(String.format("Couldn't read file attributes for %s : ", path), ioe);
    return false;
  }

  long creationTime = attrs.creationTime().toMillis();
  return creationTime < threshold;
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
/**
 * Retorna a data da última modificação no arquivo
 *
 * @param file local do arquivo
 * @return data da última modificação no arquivo do banco de dados no
 * formato longtime
 */
public static long getLastModifiedTime(File file) {
    try {
        Path path = file.toPath();
        BasicFileAttributes attr = Files.readAttributes(path, BasicFileAttributes.class);
        return attr.lastModifiedTime().toMillis();
    } catch (IOException ex) {
        return 0;
    }
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
/**
 * Returns the file attributes of the image file.
 */
BasicFileAttributes imageFileAttributes() {
    BasicFileAttributes attrs = imageFileAttributes;
    if (attrs == null) {
        try {
            Path file = getImagePath();
            attrs = Files.readAttributes(file, BasicFileAttributes.class);
        } catch (IOException ioe) {
            throw new UncheckedIOException(ioe);
        }
        imageFileAttributes = attrs;
    }
    return attrs;
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
/**
 * Scans the given directory for packaged or exploded modules.
 *
 * @return a map of module name to ModuleReference for the modules found
 *         in the directory
 *
 * @throws IOException if an I/O error occurs
 * @throws FindException if an error occurs scanning the entry or the
 *         directory contains two or more modules with the same name
 */
private Map<String, ModuleReference> scanDirectory(Path dir)
    throws IOException
{
    // The map of name -> mref of modules found in this directory.
    Map<String, ModuleReference> nameToReference = new HashMap<>();

    try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir)) {
        for (Path entry : stream) {
            BasicFileAttributes attrs;
            try {
                attrs = Files.readAttributes(entry, BasicFileAttributes.class);
            } catch (NoSuchFileException ignore) {
                // file has been removed or moved, ignore for now
                continue;
            }

            ModuleReference mref = readModule(entry, attrs);

            // module found
            if (mref != null) {
                // can have at most one version of a module in the directory
                String name = mref.descriptor().name();
                ModuleReference previous = nameToReference.put(name, mref);
                if (previous != null) {
                    String fn1 = fileName(mref);
                    String fn2 = fileName(previous);
                    throw new FindException("Two versions of module "
                                             + name + " found in " + dir
                                             + " (" + fn1 + " and " + fn2 + ")");
                }
            }
        }
    }

    return nameToReference;
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
private Bucket bucketFromPath(final Path path) {
  Bucket result = null;
  final BasicFileAttributes attributes;
  try {
    attributes = Files.readAttributes(path, BasicFileAttributes.class);
    result =
        new Bucket(path,
            path.getFileName().toString(),
            S3_OBJECT_DATE_FORMAT.format(new Date(attributes.creationTime().toMillis())));
  } catch (final IOException e) {
    LOG.error("File can not be read!", e);
  }

  return result;
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
ExplodedImage(Path modulesDir) throws IOException {
    defaultFS = FileSystems.getDefault();
    String str = defaultFS.getSeparator();
    separator = str.equals("/") ? null : str;
    modulesDirAttrs = Files.readAttributes(modulesDir, BasicFileAttributes.class);
    initNodes();
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
/**
 * Stores an encrypted File inside a Bucket
 *
 * @param bucketName Bucket to store the File in
 * @param fileName name of the File to be stored
 * @param contentType The files Content Type
 * @param dataStream The File as InputStream
 * @param useV4Signing If {@code true}, V4-style signing is enabled.
 * @param encryption The Encryption Type
 * @param kmsKeyId The KMS encryption key id
 * @return {@link S3Object}
 * @throws IOException if an I/O error occurs
 */
public S3Object putS3ObjectWithKMSEncryption(final String bucketName,
    final String fileName,
    final String contentType,
    final InputStream dataStream,
    final boolean useV4Signing,
    final String encryption, final String kmsKeyId) throws IOException {
  final S3Object s3Object = new S3Object();
  s3Object.setName(fileName);
  s3Object.setContentType(contentType);
  s3Object.setEncrypted(true);
  s3Object.setKmsEncryption(encryption);
  s3Object.setKmsEncryptionKeyId(kmsKeyId);

  final Bucket theBucket = getBucketOrCreateNewOne(bucketName);

  final File objectRootFolder = createObjectRootFolder(theBucket, s3Object.getName());

  final File dataFile =
      inputStreamToFile(wrapStream(dataStream, useV4Signing),
          objectRootFolder.toPath().resolve(DATA_FILE));
  s3Object.setDataFile(dataFile);

  s3Object.setSize(Long.toString(dataFile.length()));

  final BasicFileAttributes attributes =
      Files.readAttributes(dataFile.toPath(), BasicFileAttributes.class);
  s3Object.setCreationDate(
      S3_OBJECT_DATE_FORMAT.format(new Date(attributes.creationTime().toMillis())));
  s3Object.setModificationDate(
      S3_OBJECT_DATE_FORMAT.format(new Date(attributes.lastModifiedTime().toMillis())));
  s3Object.setLastModified(attributes.lastModifiedTime().toMillis());

  s3Object.setMd5(digest(kmsKeyId, dataFile));

  objectMapper.writeValue(new File(objectRootFolder, META_FILE), s3Object);

  return s3Object;
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
@Override
public Map<String,Object> readAttributes(Path file, String attributes, LinkOption... options)
    throws IOException
{
    triggerEx(file, "readAttributes");
    return Files.readAttributes(unwrap(file), attributes, options);
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
/**
 * Stores a File inside a Bucket
 *
 * @param bucketName Bucket to store the File in
 * @param fileName name of the File to be stored
 * @param contentType The files Content Type
 * @param dataStream The File as InputStream
 * @param useV4Signing If {@code true}, V4-style signing is enabled.
 * @return {@link S3Object}
 * @throws IOException if an I/O error occurs
 */
public S3Object putS3Object(final String bucketName,
    final String fileName,
    final String contentType,
    final InputStream dataStream,
    final boolean useV4Signing) throws IOException {
  final S3Object s3Object = new S3Object();
  s3Object.setName(fileName);
  s3Object.setContentType(contentType);

  final Bucket theBucket = getBucketOrCreateNewOne(bucketName);

  final File objectRootFolder = createObjectRootFolder(theBucket, s3Object.getName());

  final File dataFile =
      inputStreamToFile(wrapStream(dataStream, useV4Signing),
          objectRootFolder.toPath().resolve(DATA_FILE));
  s3Object.setDataFile(dataFile);
  s3Object.setSize(Long.toString(dataFile.length()));

  final BasicFileAttributes attributes =
      Files.readAttributes(dataFile.toPath(), BasicFileAttributes.class);
  s3Object.setCreationDate(
      S3_OBJECT_DATE_FORMAT.format(new Date(attributes.creationTime().toMillis())));
  s3Object.setModificationDate(
      S3_OBJECT_DATE_FORMAT.format(new Date(attributes.lastModifiedTime().toMillis())));
  s3Object.setLastModified(attributes.lastModifiedTime().toMillis());

  s3Object.setMd5(digest(null, dataFile));

  objectMapper.writeValue(new File(objectRootFolder, META_FILE), s3Object);

  return s3Object;
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
public static void summaryAll() throws IOException{
    int sel = jTabbedPane1.getSelectedIndex();
    jLabel23.setText(jTabbedPane1.getTitleAt(sel));
    jLabel24.setText("File Location : " + titleText.getText());
    /**String[] {splitStrings = filesave.getSelectedFile().getName().split("\\.") ;
        String extension = splitStrings[splitStrings.length-1] ;
        fileext.setText(extension);}**/
    jLabel16.setText("File Extention : " + titleExtLa.getText());
    JTextArea textPane = (JTextArea) ((JScrollPane) ((JDesktopPane)jTabbedPane1.getComponentAt(sel)).getComponent(0)).getViewport().getComponent(0);
    String totaltext=  textPane.getText();
    String totalwords[]=totaltext.split("\\s");  
    jLabel21.setText("Total Word Typed : " + totalwords.length);
    jLabel5.setText("Total Characters With Spaces : " + totaltext.length());
    jLabel22.setText("Total Line : " + BasicEvents.getLineCount(textPane));
	if (titleText.getText().contains("Untitled")) {
        DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
            DateFormat date = new SimpleDateFormat("dd/MM/yyyy");
            Calendar cal = Calendar.getInstance();
        jLabel27.setText(dateFormat.format(cal.getTime())); 
        jLabel25.setText(dateFormat.format(cal.getTime()));
    } else {
        Path filepath = Paths.get(titleText.getText()) ;
        BasicFileAttributes attr = Files.readAttributes(filepath, BasicFileAttributes.class);
            String dateCreate = ""+attr.creationTime() ; String dateCreat = dateCreate.replace("T", "  Time Created : ");
            String lastModi = ""+attr.lastModifiedTime() ; String lastMod = lastModi.replace("T", "  Last Time Modified : ");
             jLabel25.setText("Date Created : " + dateCreat );
            jLabel27.setText("Last Date Modified : " + lastMod );
    }
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
public void checkAndNotify() throws IOException {
    boolean prevExists = exists;
    boolean prevIsDirectory = isDirectory;
    long prevLength = length;
    long prevLastModified = lastModified;

    exists = Files.exists(file);
    // TODO we might use the new NIO2 API to get real notification?
    if (exists) {
        BasicFileAttributes attributes = Files.readAttributes(file, BasicFileAttributes.class);
        isDirectory = attributes.isDirectory();
        if (isDirectory) {
            length = 0;
            lastModified = 0;
        } else {
            length = attributes.size();
            lastModified = attributes.lastModifiedTime().toMillis();
        }
    } else {
        isDirectory = false;
        length = 0;
        lastModified = 0;
    }

    // Perform notifications and update children for the current file
    if (prevExists) {
        if (exists) {
            if (isDirectory) {
                if (prevIsDirectory) {
                    // Remained a directory
                    updateChildren();
                } else {
                    // File replaced by directory
                    onFileDeleted();
                    onDirectoryCreated(false);
                }
            } else {
                if (prevIsDirectory) {
                    // Directory replaced by file
                    onDirectoryDeleted();
                    onFileCreated(false);
                } else {
                    // Remained file
                    if (prevLastModified != lastModified || prevLength != length) {
                        onFileChanged();
                    }
                }
            }
        } else {
            // Deleted
            if (prevIsDirectory) {
                onDirectoryDeleted();
            } else {
                onFileDeleted();
            }
        }
    } else {
        // Created
        if (exists) {
            if (isDirectory) {
                onDirectoryCreated(false);
            } else {
                onFileCreated(false);
            }
        }
    }

}
 

import java.nio.file.Files; //導入方法依賴的package包/類
private static long lastModified(String fileName) throws IOException {
    Path path = Paths.get(fileName);
    BasicFileAttributes attr = Files.readAttributes(path, BasicFileAttributes.class);
    return attr.lastModifiedTime().toMillis();
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
public static boolean isSymbolicLink(String path) throws Exception {
	BasicFileAttributes attrs = Files.readAttributes(FileSystems.getDefault().getPath(polishFilePath(path)), BasicFileAttributes.

			class, LinkOption.NOFOLLOW_LINKS);
	return attrs.isSymbolicLink();
}