How can I connect to an SSH server in Java? I don't need/want a shell. I just want to connect to the SSH server and get the content of, say, file.txt
. How can I do that?
Use JSch
import com.jcraft.jsch.*;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Scanner;
/**
* @author World
*/
public class SSHReadFile {
public static void main(String args[]) {
String user = "john";
String password = "mypassword";
String host = "192.168.100.23";
int port = 22;
String remoteFile = "/home/john/test.txt";
try {
JSch jsch = new JSch();
Session session = jsch.getSession(user, host, port);
session.setPassword(password);
session.setConfig("StrictHostKeyChecking", "no");
System.out.println("Establishing Connection...");
session.connect();
System.out.println("Connection established.");
System.out.println("Crating SFTP Channel.");
ChannelSftp sftpChannel = (ChannelSftp) session.openChannel("sftp");
sftpChannel.connect();
System.out.println("SFTP Channel created.");
InputStream inputStream = sftpChannel.get(remoteFile);
try (Scanner scanner = new Scanner(new InputStreamReader(inputStream))) {
while (scanner.hasNextLine()) {
String line = scanner.nextLine();
System.out.println(line);
}
}
} catch (JSchException | SftpException e) {
e.printStackTrace();
}
}
}
output:
Establishing Connection...
Connection established.
Crating SFTP Channel.
SFTP Channel created.
This is content from file /home/john/test.txt