SFTP in JAVA

Following JAVA functions can be used to execute SFTP(Secure FTP).

    public boolean putSFTPFile(String sftpHost, String userID, String password, String remoteDirectory, String localDirectory, String fileName) throws FileSystemException {

        boolean put = false;
        StandardFileSystemManager manager = new StandardFileSystemManager();

        try {

            String filepath = localDirectory + fileName;
            File file = new File(filepath);
            if (!file.exists()) {
                throw new RuntimeException("Error. Local file not found.");
            }
            manager.init();

            FileSystemOptions opts = new FileSystemOptions();
            SftpFileSystemConfigBuilder.getInstance().setStrictHostKeyChecking(
                    opts, "no");
            SftpFileSystemConfigBuilder.getInstance().setUserDirIsRoot(opts, true);
            SftpFileSystemConfigBuilder.getInstance().setTimeout(opts, 10000);

            String sftpUri = "sftp://" + userID + ":" + password + "@" + sftpHost + "/" + remoteDirectory + fileName;

            FileObject localFile = manager.resolveFile(file.getAbsolutePath());
            System.out.println(file.getAbsolutePath());

            FileObject remoteFile = manager.resolveFile(sftpUri, opts);

            remoteFile.copyFrom(localFile, Selectors.SELECT_SELF);
            put = true;

        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            manager.close();
        }
        return put;
    }

    public boolean getSFTPFile(String sftpHost, String userID, String password, String remoteDirectory, String localDirectory, String fileName) {

        boolean get = false;
        StandardFileSystemManager manager = new StandardFileSystemManager();

        try {

            manager.init();

            FileSystemOptions opts = new FileSystemOptions();
            SftpFileSystemConfigBuilder.getInstance().setStrictHostKeyChecking(
                    opts, "no");
            SftpFileSystemConfigBuilder.getInstance().setUserDirIsRoot(opts, true);
            SftpFileSystemConfigBuilder.getInstance().setTimeout(opts, 10000);

            String sftpUri = "sftp://" + userID + ":" + password + "@" + sftpHost + "/"
                    + remoteDirectory + fileName;

            String filepath = localDirectory + fileName;
            File file = new File(filepath);
            FileObject localFile = manager.resolveFile(file.getAbsolutePath());

            FileObject remoteFile = manager.resolveFile(sftpUri, opts);

            localFile.copyFrom(remoteFile, Selectors.SELECT_SELF);
            get = true;
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            manager.close();
        }
        return get;
    }

    public boolean deleteSFTFile(String sftpHost, String userID, String password, String remoteDirectory, String fileName) {

        boolean delete = false;
        StandardFileSystemManager manager = new StandardFileSystemManager();

        try {

            manager.init();

            FileSystemOptions opts = new FileSystemOptions();
            SftpFileSystemConfigBuilder.getInstance().setStrictHostKeyChecking(
                    opts, "no");
            SftpFileSystemConfigBuilder.getInstance().setUserDirIsRoot(opts, true);
            SftpFileSystemConfigBuilder.getInstance().setTimeout(opts, 10000);

            String sftpUri = "sftp://" + userID + ":" + password + "@" + sftpHost + "/"
                    + remoteDirectory + fileName;

            FileObject remoteFile = manager.resolveFile(sftpUri, opts);

            if (remoteFile.exists()) {
                if (remoteFile.delete()) {
                    delete = true;
                }
            }

        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            manager.close();
        }
        return delete;
    }

    public Collection getSFTPFileList(String sftpHost, String userID, String password, String remoteDirectory) throws FileSystemException {

        Collection fileCollection = new ArrayList();
        StandardFileSystemManager manager = new StandardFileSystemManager();

        FileObject localFileObject = manager.resolveFile("sftp://" + userID + ":" + password + "@" + sftpHost + "/" + remoteDirectory);
        FileObject[] children = localFileObject.getChildren();

        for (int i = 0; i < children.length; i++) {
            fileCollection.add(children[ i].getName().getBaseName());
        }

        return fileCollection;
    }

    public boolean isRemoteFileExist(String sftpHost, String userID, String password, String remoteDirectory, String fileName) {
        StandardFileSystemManager manager = new StandardFileSystemManager();
        boolean isExist = false;

        try {
            manager.init();

            //Setup our SFTP configuration
            FileSystemOptions opts = new FileSystemOptions();
            SftpFileSystemConfigBuilder.getInstance().setStrictHostKeyChecking(
                    opts, "no");
            SftpFileSystemConfigBuilder.getInstance().setUserDirIsRoot(opts, true);
            SftpFileSystemConfigBuilder.getInstance().setTimeout(opts, 10000);

            String sftpUri = "sftp://" + userID + ":" + password + "@" + sftpHost + "/"
                    + remoteDirectory + fileName;

            FileObject remoteFile = manager.resolveFile(sftpUri, opts);

            isExist = remoteFile.exists();

        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            manager.close();
        }
        return isExist;
    }