Java FTPClient.printWorkingDirectory方法代碼示例

import org.apache.commons.net.ftp.FTPClient; //導入方法依賴的package包/類
/**
 * Convenience method, so that we don't open a new connection when using this
 * method from within another method. Otherwise every API invocation incurs
 * the overhead of opening/closing a TCP connection.
 */
private boolean mkdirs(FTPClient client, Path file, FsPermission permission)
    throws IOException {
  boolean created = true;
  Path workDir = new Path(client.printWorkingDirectory());
  Path absolute = makeAbsolute(workDir, file);
  String pathName = absolute.getName();
  if (!exists(client, absolute)) {
    Path parent = absolute.getParent();
    created = (parent == null || mkdirs(client, parent, FsPermission
        .getDirDefault()));
    if (created) {
      String parentDir = parent.toUri().getPath();
      client.changeWorkingDirectory(parentDir);
      created = created && client.makeDirectory(pathName);
    }
  } else if (isFile(client, absolute)) {
    throw new ParentNotDirectoryException(String.format(
        "Can't make directory for path %s since it is a file.", absolute));
  }
  return created;
}
 

import org.apache.commons.net.ftp.FTPClient; //導入方法依賴的package包/類
@Override
public FSDataInputStream open(Path file, int bufferSize) throws IOException {
  FTPClient client = connect();
  Path workDir = new Path(client.printWorkingDirectory());
  Path absolute = makeAbsolute(workDir, file);
  FileStatus fileStat = getFileStatus(client, absolute);
  if (fileStat.isDirectory()) {
    disconnect(client);
    throw new FileNotFoundException("Path " + file + " is a directory.");
  }
  client.allocate(bufferSize);
  Path parent = absolute.getParent();
  // Change to parent directory on the
  // server. Only then can we read the
  // file
  // on the server by opening up an InputStream. As a side effect the working
  // directory on the server is changed to the parent directory of the file.
  // The FTP client connection is closed when close() is called on the
  // FSDataInputStream.
  client.changeWorkingDirectory(parent.toUri().getPath());
  InputStream is = client.retrieveFileStream(file.getName());
  FSDataInputStream fis = new FSDataInputStream(new FTPInputStream(is,
      client, statistics));
  if (!FTPReply.isPositivePreliminary(client.getReplyCode())) {
    // The ftpClient is an inconsistent state. Must close the stream
    // which in turn will logout and disconnect from FTP server
    fis.close();
    throw new IOException("Unable to open file: " + file + ", Aborting");
  }
  return fis;
}
 

import org.apache.commons.net.ftp.FTPClient; //導入方法依賴的package包/類
/**
 * Convenience method, so that we don't open a new connection when using this
 * method from within another method. Otherwise every API invocation incurs
 * the overhead of opening/closing a TCP connection.
 */
private boolean delete(FTPClient client, Path file, boolean recursive)
    throws IOException {
  Path workDir = new Path(client.printWorkingDirectory());
  Path absolute = makeAbsolute(workDir, file);
  String pathName = absolute.toUri().getPath();
  try {
    FileStatus fileStat = getFileStatus(client, absolute);
    if (fileStat.isFile()) {
      return client.deleteFile(pathName);
    }
  } catch (FileNotFoundException e) {
    //the file is not there
    return false;
  }
  FileStatus[] dirEntries = listStatus(client, absolute);
  if (dirEntries != null && dirEntries.length > 0 && !(recursive)) {
    throw new IOException("Directory: " + file + " is not empty.");
  }
  for (FileStatus dirEntry : dirEntries) {
    delete(client, new Path(absolute, dirEntry.getPath()), recursive);
  }
  return client.removeDirectory(pathName);
}
 

import org.apache.commons.net.ftp.FTPClient; //導入方法依賴的package包/類
/**
 * Convenience method, so that we don't open a new connection when using this
 * method from within another method. Otherwise every API invocation incurs
 * the overhead of opening/closing a TCP connection.
 */
private FileStatus[] listStatus(FTPClient client, Path file)
    throws IOException {
  Path workDir = new Path(client.printWorkingDirectory());
  Path absolute = makeAbsolute(workDir, file);
  FileStatus fileStat = getFileStatus(client, absolute);
  if (fileStat.isFile()) {
    return new FileStatus[] { fileStat };
  }
  FTPFile[] ftpFiles = client.listFiles(absolute.toUri().getPath());
  FileStatus[] fileStats = new FileStatus[ftpFiles.length];
  for (int i = 0; i < ftpFiles.length; i++) {
    fileStats[i] = getFileStatus(ftpFiles[i], absolute);
  }
  return fileStats;
}
 

import org.apache.commons.net.ftp.FTPClient; //導入方法依賴的package包/類
/**
 * Convenience method, so that we don't open a new connection when using this
 * method from within another method. Otherwise every API invocation incurs
 * the overhead of opening/closing a TCP connection.
 */
private FileStatus getFileStatus(FTPClient client, Path file)
    throws IOException {
  FileStatus fileStat = null;
  Path workDir = new Path(client.printWorkingDirectory());
  Path absolute = makeAbsolute(workDir, file);
  Path parentPath = absolute.getParent();
  if (parentPath == null) { // root dir
    long length = -1; // Length of root dir on server not known
    boolean isDir = true;
    int blockReplication = 1;
    long blockSize = DEFAULT_BLOCK_SIZE; // Block Size not known.
    long modTime = -1; // Modification time of root dir not known.
    Path root = new Path("/");
    return new FileStatus(length, isDir, blockReplication, blockSize,
        modTime, root.makeQualified(this));
  }
  String pathName = parentPath.toUri().getPath();
  FTPFile[] ftpFiles = client.listFiles(pathName);
  if (ftpFiles != null) {
    for (FTPFile ftpFile : ftpFiles) {
      if (ftpFile.getName().equals(file.getName())) { // file found in dir
        fileStat = getFileStatus(ftpFile, parentPath);
        break;
      }
    }
    if (fileStat == null) {
      throw new FileNotFoundException("File " + file + " does not exist.");
    }
  } else {
    throw new FileNotFoundException("File " + file + " does not exist.");
  }
  return fileStat;
}
 

import org.apache.commons.net.ftp.FTPClient; //導入方法依賴的package包/類
protected void makeRemoteDir(FTPClient ftp, String dir)
        throws IOException {
    String workingDirectory = ftp.printWorkingDirectory();
    if (dir.indexOf("/") == 0) {
        ftp.changeWorkingDirectory("/");
    }
    String subdir;
    StringTokenizer st = new StringTokenizer(dir, "/");
    while (st.hasMoreTokens()) {
        subdir = st.nextToken();
        if (!(ftp.changeWorkingDirectory(subdir))) {
            if (!(ftp.makeDirectory(subdir))) {
                int rc = ftp.getReplyCode();
                if (rc != 550 && rc != 553 && rc != 521) {
                    throw new IOException("could not create directory: " + ftp.getReplyString());
                }
            } else {
                ftp.changeWorkingDirectory(subdir);
            }
        }
    }
    if (workingDirectory != null) {
        ftp.changeWorkingDirectory(workingDirectory);
    }
}
 

import org.apache.commons.net.ftp.FTPClient; //導入方法依賴的package包/類
/**
 * A stream obtained via this call must be closed before using other APIs of
 * this class or else the invocation will block.
 */
@Override
public FSDataOutputStream create(Path file, FsPermission permission,
    boolean overwrite, int bufferSize, short replication, long blockSize,
    Progressable progress) throws IOException {
  final FTPClient client = connect();
  Path workDir = new Path(client.printWorkingDirectory());
  Path absolute = makeAbsolute(workDir, file);
  FileStatus status;
  try {
    status = getFileStatus(client, file);
  } catch (FileNotFoundException fnfe) {
    status = null;
  }
  if (status != null) {
    if (overwrite && !status.isDirectory()) {
      delete(client, file, false);
    } else {
      disconnect(client);
      throw new FileAlreadyExistsException("File already exists: " + file);
    }
  }
  
  Path parent = absolute.getParent();
  if (parent == null || !mkdirs(client, parent, FsPermission.getDirDefault())) {
    parent = (parent == null) ? new Path("/") : parent;
    disconnect(client);
    throw new IOException("create(): Mkdirs failed to create: " + parent);
  }
  client.allocate(bufferSize);
  // Change to parent directory on the server. Only then can we write to the
  // file on the server by opening up an OutputStream. As a side effect the
  // working directory on the server is changed to the parent directory of the
  // file. The FTP client connection is closed when close() is called on the
  // FSDataOutputStream.
  client.changeWorkingDirectory(parent.toUri().getPath());
  FSDataOutputStream fos = new FSDataOutputStream(client.storeFileStream(file
      .getName()), statistics) {
    @Override
    public void close() throws IOException {
      super.close();
      if (!client.isConnected()) {
        throw new FTPException("Client not connected");
      }
      boolean cmdCompleted = client.completePendingCommand();
      disconnect(client);
      if (!cmdCompleted) {
        throw new FTPException("Could not complete transfer, Reply Code - "
            + client.getReplyCode());
      }
    }
  };
  if (!FTPReply.isPositivePreliminary(client.getReplyCode())) {
    // The ftpClient is an inconsistent state. Must close the stream
    // which in turn will logout and disconnect from FTP server
    fos.close();
    throw new IOException("Unable to create file: " + file + ", Aborting");
  }
  return fos;
}
 

import org.apache.commons.net.ftp.FTPClient; //導入方法依賴的package包/類
private void buildFileTree(TreeItem treeNode, FTPClient client) throws Exception {

        // display the files
        FTPFile[] files = client.listFiles("", FTPFile::isFile);

        for (FTPFile file : files) {

            if(!file.getName().startsWith(".")) {

                System.out.println("File: " + file.getName());

                // add file to file tree
                treeNode.getChildren().add(new TreeItem<>(getFileDisplayText(client, file)));

            } // if

        } // for

        // get the directories
        FTPFile[] directories = client.listDirectories();

        for (FTPFile dir : directories) {

            if(!dir.getName().startsWith(".")) {

                // change working directory to detected directory
                client.changeWorkingDirectory(dir.getName());

                // save working dir
                String pwd = client.printWorkingDirectory();

                // create treeItem to represent new Directory
                TreeItem newDir = new TreeItem<>(dir.getName(), new ImageView(dirIcon));
                newDir.setExpanded(false);

                // add directory to file tree
                treeNode.getChildren().add(newDir);

                Platform.runLater(() -> logTA.appendText("\nDiscovering Files in: " + pwd));
                System.out.println("Discovering Files in: " + pwd);

                // recursively call method to add files and directories to new directory
                buildFileTree(newDir, client);

                // go back to parent directory, once finished in this directory
                client.changeToParentDirectory();

            } // if

        } // for

    }