SFTP Using Java (VFS jar)
Download and add the below library in your class path.
Using the below java code we can perform the following operation in a SFTP server
1. Upload a file intO Remote server using SFTP
2. Download a file from Remote server using SFTP
3. Delete a file in remote system using sftp
4. Rename a file in remote system using SFTP
** UPDATE: FTP Complete tutorial now available here.
import java.io.File; import org.apache.commons.vfs2.FileObject; import org.apache.commons.vfs2.FileSystemException; import org.apache.commons.vfs2.FileSystemOptions; import org.apache.commons.vfs2.Selectors; import org.apache.commons.vfs2.impl.StandardFileSystemManager; import org.apache.commons.vfs2.provider.sftp.SftpFileSystemConfigBuilder; public class SftpExample { public static void main(String[] args) { String hostName = "localhost"; String username = "admin"; String password = "admin"; String localFilePath = "C:/text.txt"; String remoteFilePath = "/test/text.txt"; upload(hostName, username, password, localFilePath, remoteFilePath); exist(hostName, username, password, remoteFilePath); download(hostName, username, password, localFilePath, remoteFilePath); delete(hostName, username, password, remoteFilePath); } // Method to upload a file in Remote server public static void upload(String hostName, String username, String password, String localFilePath, String remoteFilePath) { File file = new File(localFilePath); if (!file.exists()) throw new RuntimeException("Error. Local file not found"); StandardFileSystemManager manager = new StandardFileSystemManager(); try { manager.init(); // Create local file object FileObject localFile = manager.resolveFile(file.getAbsolutePath()); // Create remote file object FileObject remoteFile = manager.resolveFile( createConnectionString(hostName, username, password, remoteFilePath), createDefaultOptions()); // Copy local file to sftp server remoteFile.copyFrom(localFile, Selectors.SELECT_SELF); System.out.println("File upload success"); } catch (Exception e) { throw new RuntimeException(e); } finally { manager.close(); } } // Download file function: public static void download(String hostName, String username, String password, String localFilePath, String remoteFilePath) { StandardFileSystemManager manager = new StandardFileSystemManager(); try { manager.init(); String downloadFilePath = localFilePath.substring(0, localFilePath.lastIndexOf(".")) + "_downlaod_from_sftp" + localFilePath.substring(localFilePath.lastIndexOf("."), localFilePath.length()); // Create local file object FileObject localFile = manager.resolveFile(downloadFilePath); // Create remote file object FileObject remoteFile = manager.resolveFile( createConnectionString(hostName, username, password, remoteFilePath), createDefaultOptions()); // Copy local file to sftp server localFile.copyFrom(remoteFile, Selectors.SELECT_SELF); System.out.println("File download success"); } catch (Exception e) { throw new RuntimeException(e); } finally { manager.close(); } } // Delete file in remote system: public static void delete(String hostName, String username, String password, String remoteFilePath) { StandardFileSystemManager manager = new StandardFileSystemManager(); try { manager.init(); // Create remote object FileObject remoteFile = manager.resolveFile( createConnectionString(hostName, username, password, remoteFilePath), createDefaultOptions()); if (remoteFile.exists()) { remoteFile.delete(); System.out.println("Delete remote file success"); } } catch (Exception e) { throw new RuntimeException(e); } finally { manager.close(); } } // Check remote file is exist function: public static boolean exist(String hostName, String username, String password, String remoteFilePath) { StandardFileSystemManager manager = new StandardFileSystemManager(); try { manager.init(); // Create remote object FileObject remoteFile = manager.resolveFile( createConnectionString(hostName, username, password, remoteFilePath), createDefaultOptions()); System.out.println("File exist: " + remoteFile.exists()); return remoteFile.exists(); } catch (Exception e) { throw new RuntimeException(e); } finally { manager.close(); } } // Establishing connection public static String createConnectionString(String hostName, String username, String password, String remoteFilePath) { return "sftp://" + username + ":" + password + "@" + hostName + "/" + remoteFilePath; } // Method to setup default SFTP config: public static FileSystemOptions createDefaultOptions() throws FileSystemException { // Create SFTP options FileSystemOptions opts = new FileSystemOptions(); // SSH Key checking SftpFileSystemConfigBuilder.getInstance().setStrictHostKeyChecking( opts, "no"); // Root directory set to user home SftpFileSystemConfigBuilder.getInstance().setUserDirIsRoot(opts, true); // Timeout is count by Milliseconds SftpFileSystemConfigBuilder.getInstance().setTimeout(opts, 10000); return opts; } }Read More