Reading a remote file using Java

Question

I am looking for an easy way to get files that are situated on a remote server. For this I created a local ftp server on my Windows XP, and now I am trying to give my test a

Answer 1

This worked for me, while trying to bring the file from a remote machine onto my machine.

NOTE - These are the parameters passed to the function mentioned in the code below:

String domain = "xyz.company.com";
String userName = "GDD";
String password = "fjsdfks";

(here you have to give your machine ip address of the remote system, then the path of the text file (testFileUpload.txt) on the remote machine, here C$ means C drive of the remote system. Also the ip address starts with \\ , but in order to escape the two backslashes we start it \\\\ )

String remoteFilePathTransfer = "\\\\13.3.2.33\\c$\\FileUploadVerify\\testFileUpload.txt";

(here this is the path on the local machine at which the file has to be transferred, it will create this new text file - testFileUploadTransferred.txt, with the contents on the remote file - testFileUpload.txt which is on the remote system)

String fileTransferDestinationTransfer = "D:/FileUploadVerification/TransferredFromRemote/testFileUploadTransferred.txt";

import java.io.File;
import java.io.IOException;

import org.apache.commons.vfs.FileObject;
import org.apache.commons.vfs.FileSystemException;
import org.apache.commons.vfs.FileSystemManager;
import org.apache.commons.vfs.FileSystemOptions;
import org.apache.commons.vfs.Selectors;
import org.apache.commons.vfs.UserAuthenticator;
import org.apache.commons.vfs.VFS;
import org.apache.commons.vfs.auth.StaticUserAuthenticator;
import org.apache.commons.vfs.impl.DefaultFileSystemConfigBuilder;

public class FileTransferUtility {

    public void transferFileFromRemote(String domain, String userName, String password, String remoteFileLocation,
            String fileDestinationLocation) {

        File f = new File(fileDestinationLocation);
        FileObject destn;
        try {
            FileSystemManager fm = VFS.getManager();

            destn = VFS.getManager().resolveFile(f.getAbsolutePath());

            if(!f.exists())
            {
                System.out.println("File : "+fileDestinationLocation +" does not exist. transferring file from : "+ remoteFileLocation+" to: "+fileDestinationLocation);
            }
            else
                System.out.println("File : "+fileDestinationLocation +" exists. Transferring(override) file from : "+ remoteFileLocation+" to: "+fileDestinationLocation);

            UserAuthenticator auth = new StaticUserAuthenticator(domain, userName, password);
            FileSystemOptions opts = new FileSystemOptions();
            DefaultFileSystemConfigBuilder.getInstance().setUserAuthenticator(opts, auth);
            FileObject fo = VFS.getManager().resolveFile(remoteFileLocation, opts);
            System.out.println(fo.exists());
            destn.copyFrom(fo, Selectors.SELECT_SELF);
            destn.close();
            if(f.exists())
            {
                System.out.println("File transfer from : "+ remoteFileLocation+" to: "+fileDestinationLocation+" is successful");
            }
        }

        catch (FileSystemException e) {
            e.printStackTrace();
        }

    }

}