Java – how do I get the file list from the SFTP server?

I have a problem and hope to get a solution I also wrote some code, but I need to make some changes

Question: I have an SFTP server (for privacy purposes, I will provide virtual credentials) and I need to connect to

Server name: server name port: 22 user name: user name password: password

When I connect to the server, it will automatically put me in the "/ FGV" directory In this directory are several other folders I need to get the list of XML messages from the "/ FGV / US / BS /" directory and put them in list (file form) In the list, I need file directory, file name and file body I'm thinking about creating an object and putting this information there and creating a list of that object

My current code creates a connection and downloads only one XML file If there are two XML files, there is nothing in the file on the local computer

import java.io.BufferedInputStream;
import java.io.bufferedoutputstream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;

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

public class SFTPinJava {

    public SFTPinJava() {
    }

    public static void main(String[] args) {
        String SFTPHOST = "server-name";
        int SFTPPORT = 22;
        String SFTPUSER = "username";
        String SFTPPASS = "password";
        String SFTPWORKINGDIR = "/FGV";

        Session session = null;
        Channel channel = null;
        ChannelSftp channelSftp = null;

        try {
            JSch jsch = new JSch();
            session = jsch.getSession(SFTPUSER,SFTPHOST,SFTPPORT);
            session.setPassword(SFTPPASS);
            java.util.Properties config = new java.util.Properties();
            config.put("StrictHostKeyChecking","no");
            session.setConfig(config);
            session.connect();
            channel = session.openChannel("sftp");
            channel.connect();
            channelSftp = (ChannelSftp) channel;
            channelSftp.cd(SFTPWORKINGDIR);
            byte[] buffer = new byte[1024];
            BufferedInputStream bis = new BufferedInputStream(
                    channelSftp.get("/FGV/US/BS/FGVCustomsEntryLoaderService.xml"));
            File newFile = new File(
                    "C:\\workspace\\Crap\\src\\org\\raghav\\stuff\\XML_FROM_SERVER.xml");
            OutputStream os = new FileOutputStream(newFile);
            bufferedoutputstream bos = new bufferedoutputstream(os);
            int readCount;
            //System.out.println("Getting: " + theLine);
            while ((readCount = bis.read(buffer)) > 0) {
                //System.out.println("Writing: ");
                bos.write(buffer,readCount);
            }

            while(session != null){
                System.out.println("Killing the session");
                session.disconnect();
                bis.close();
                bos.close();
                System.exit(0);
            }

        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

I need to change this code so that it can get multiple files and put them in the object list The object should have a file directory, file name, and file body

Solution

You can use to list all files in a given directory

Vector<ChannelSftp.LsEntry> list = channelSftp.ls("*.csv");
for(ChannelSftp.LsEntry entry : list) {
     System.out.println(entry.getFilename()); 
}

Add this code later

channelSftp.cd(SFTPWORKINGDIR);

You will now get a list of file objects If you want to download all the files, the file object is entry Add this code to the for loop

byte[] buffer = new byte[1024];
BufferedInputStream bis = new BufferedInputStream(channelSftp.get(entry.getFilename()));
File newFile = new File("C:/Users/Desktop/sftpStuff/"+entry.getFilename());
OutputStream os = new FileOutputStream(newFile);
bufferedoutputstream bos = new bufferedoutputstream(os);
int readCount;
//System.out.println("Getting: " + theLine);
while( (readCount = bis.read(buffer)) > 0) {
  System.out.println("Writing: "+entry.getFilename() );
  bos.write(buffer,readCount);
}
bis.close();
bos.close();