initial commit

Author: Amitbhave

RemoteFileTransfer/bin/FileTransferClient.class

@@ -0,0 +1,31 @@
+import com.jcraft.jsch.ChannelSftp;
+
+/**
+ * 
+ */
+
+/**
+ * @author amitb
+ *
+ */
+public class FileTransferClient {
+
+	public static void main(String[] args) {
+		String host = "HOST";
+		int port = 22;
+		String username = "USERNAME";
+		String password = "PASSWORD";
+
+		// connects and starts session with remote host
+		ChannelSftp sftpChannel = RemoteFileTransferService.connect(host, port, username, password);
+		if (sftpChannel != null) {
+			String downloadFilePath = "PATH_OF_FILE_TO_DOWNLOAD"; // path on the remote host
+			String saveFilePath = "PATH_WHERE_FILE_TO_BE_SAVED"; // local path
+			// downloads the file to local path
+			RemoteFileTransferService.downloadRemoteFile(downloadFilePath, saveFilePath, sftpChannel);
+			
+			// disconnects the session
+			RemoteFileTransferService.disconnect();
+		}
+	}
+}

RemoteFileTransfer/bin/RemoteFileTransferService.class

@@ -0,0 +1,80 @@
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.Properties;
+
+import com.jcraft.jsch.Channel;
+import com.jcraft.jsch.ChannelSftp;
+import com.jcraft.jsch.JSch;
+import com.jcraft.jsch.JSchException;
+import com.jcraft.jsch.Session;
+import com.jcraft.jsch.SftpException;
+
+/**
+ * 
+ */
+
+/**
+ * @author amitb
+ *
+ */
+public class RemoteFileTransferService {
+
+	private static Session sshSession;
+
+	public static ChannelSftp connect(String host, int port, String username, String password) {
+		ChannelSftp sftpChannel = null;
+		JSch jsch = new JSch();
+
+		try {
+			// host login info
+			sshSession = jsch.getSession(username, host, port);
+			sshSession.setPassword(password);
+
+			Properties sshConfiguration = new Properties();
+			sshConfiguration.put("StrictHostKeyChecking", "no");
+			sshSession.setConfig(sshConfiguration);
+
+			// connects to the remote host
+			sshSession.connect();
+
+			Channel channel = sshSession.openChannel("sftp");
+			channel.connect();
+			sftpChannel = (ChannelSftp) channel;
+		} catch (JSchException e) {
+			// prblem connecting remote host
+			e.printStackTrace();
+		}
+
+		return sftpChannel;
+	}
+
+	public static void disconnect() {
+		if (sshSession != null) {
+			sshSession.disconnect();
+		}
+	}
+
+	public static void downloadRemoteFile(String downloadFilePath, String saveFilePath, ChannelSftp sftpChannel) {
+		FileOutputStream fileOutputStream = null;
+		try {
+			File outputFile = new File(saveFilePath);
+			fileOutputStream = new FileOutputStream(outputFile);
+			sftpChannel.get(saveFilePath, fileOutputStream);
+		} catch (FileNotFoundException e) {
+			e.printStackTrace();
+		} catch (SftpException e) {
+			e.printStackTrace();
+		} finally {
+			if(fileOutputStream != null) {
+				try {
+					fileOutputStream.close();
+				} catch (IOException e) {
+					e.printStackTrace();
+				}
+			}
+		}
+	}
+
+}