Java to access windows machine code from unix machine

Hi all

I have a requirement where I need to send a file from a local system to the (present on the client side) unix machine using java code. I developed a code that sends the local system in unix box file successfully on the client side (I connect to the unix box using VPN client-side) provided that I run the code in my eclipse IDE present in the local system. But when I run the same code in the unix box he throws null pointer exception. May be that the unix system is not recognizing the local system. Please find the code.

abc package.

import java.io.File;

import java.io.FileInputStream;

import java.io.FilenameFilter;

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;

public class TransferFile {}

private static properties props = new Properties ();

Public Shared Sub main (string args []) throws IOException JSchException, SftpException,

{

sftpConnection();

}

public static sftpConnection() Sub survey JSchException, SftpException, IOException {}

System.out.println ("inside the sftpConnection method");

JSch jsch = new JSch();

A session = null;

Channel = null;

props.loadFromXML (new FileInputStream ("Config.xml"));

User String = props.getProperty("server.username");

Host of chain = props.getProperty ("server.hostname"); UNIX box hostname

Around port = Integer.parseInt (props.getProperty ("server.port")); port of UNIX box

Password String = props.getProperty ("server.password"); password on UNIX box

String watchFolder = props.getProperty ("localmachine.watchFolder"); folder on the local machine where I have to pick up the leader (D:\textFiles)

String outputDir = props.getProperty ("server.outputDir"); UNIX box output folder (/ home/oracle /)

String filemask = props.getProperty ("filemask"); file mask (.txt)

ChannelSftp sftpChannel = null;

Try

{

session = jsch.getSession (user, host, port);

System.out.println ("Louis");

session.setConfig ("StrictHostKeyChecking", "no");

session.setPassword (password);

System.out.println ("fffffffffffff");

session.setConfig ("PreferredAuthentications","publickey, keyboard-interactive, password");

session. Connect();

System.out.println ("login success");

Channel = session.openChannel("sftp");

Channel.Connect ();

System.out.println ("successful connection of the channel");

sftpChannel = channel (ChannelSftp);

System.out.println ("aaaaa");

File [] files = findFile (watchFolder, filemask);

for (file: files)

{

putFile (file, sftpChannel, outputDir);

}

Finally

{

If (sftpChannel! = null) {}

sftpChannel.exit ();

}

session. Disconnect();

}

public static void putFile (file, ChannelSftp sftpChannel, String outputDir) survey SftpException, IOException

{

FileInputStream fis = null;

Try

{

sftpChannel.cd (outputDir);

FIS = new FileInputStream (file);

sftpChannel.put (fis, file.getName ());

FIS. Close();

}

Finally

{

}

public static File [] findFile (String dirName, final String mask)

{

System.out.println ("inside the findFile method");

File dir = new File (dirName);

Return dir.listFiles (new FilenameFilter() {}

public boolean accept (file dir, filename As String)

{

System.out.println ("eeeeeee");

Return filename.endsWith (mask);

}

);

}

Error on UNIX I get is: -.

SftpConnection internal method

llllllll

Linda

Success of the connection

Channel successful login

AAAAA

Inside findFile method

Exception in thread "main" java.lang.NullPointerException

at abc. TranferFile.sftpConnection (TranferFile.java:58)

at abc. TranferFile.main (TranferFile.java:21)

Please help urgently...

If I understand TransferFile, what it is he's looking for the files in the local where the application is running, and then them SFTP file system to the remote system (server.hostname). Local here is the perspective from which the application runs.

I developed a code that sends the local system in unix box file successfully on the client side (I connect to the unix box using VPN client-side) provided that I run the code in my eclipse IDE present in the local system.

The reason the works above is defined in localmachine.watchFolder file/directory exists in Windows machine when you run the code. In case above you run Eclipse; the same would apply if you run the jar file outside Eclipse on the same machine.

When you run on the Unix machine while keeping the unchanged Config.xml, the application will search the directory defined in localmachine.watchFolder in the local of the UNIX file system, which obviously does not exist because the property is still set on "D: / / textFiles / / '-this way only exists in your Windows box.

Do not look into the code again to understand what it actually does. There is nothing in the code that will reach out to the file "D: / / textFiles / /" your Windows box when the application runs on the Unix machine. The code is written to always look for the directory/folder (located in localmachine.watchFolder) in the local machine file system.

If you want the ability to transfer files from your Windows machine to Unix machine with the application running on the Unix machine, you will need to change your code and the Config.xml file for:

connect to your Windows box
'cd' to ' D: / / textFiles / / ' in your Windows box
'get' files in the file to the Unix machine

This requires that your Windows box, such as the Unix box, willing to apply running SFTP server.

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