Writing code in java: How to update files from the server in the form of sftp?

In Java, you can use the JSch library to update files on the server using the SFTP protocol. The process of updating a file involves two steps: first downloading the file from the server to the local, and then uploading the updated local file back to the server. Here is a simple sample code:

import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;

public class SFTPFileUpdater {     public static void main(String[] args) {         String host = "server hostname or IP address";         int port = 22;         String username = "username";         String password = "password";

        String remoteFilePath = "/remote file path/file name";
        String localFilePath = "local file path/file name";

        try {
            JSch jsch = new JSch();
            Session session = jsch.getSession(username, host, port);
            session.setPassword(password);
            session.setConfig("StrictHostKeyChecking", "no");
            session.connect();

            Channel channel = session.openChannel("sftp");
            channel.connect();

            ChannelSftp sftpChannel = (ChannelSftp) channel;
            // Download the file on the server to the local
            sftpChannel.get(remoteFilePath, localFilePath);

            // Assuming you modified the file locally

            // Upload the updated local file back to the server
            sftpChannel.put(localFilePath, remoteFilePath, ChannelSftp.OVERWRITE);

            sftpChannel.disconnect();
            session.disconnect();

            System.out.println("File updated successfully!");
        } catch (Exception e) {             e.printStackTrace();         }     } }

jsch.jarPlease make sure you have added the library to your project before running the code . You also need to replace the server hostname, port, username, password, and remote and local file paths in the code. Before running this code, make sure the file to be updated exists on the server and that you have made modifications to the local file.

Note: In order for this code to execute smoothly, make sure that the SSH service has been installed and running on the server, and the SFTP protocol is allowed for file transfer and deletion operations.