Download a file from ftp server – Java Source Code

In my earlier article, I have shown you how to upload a document into the ftp server. Here is the code to download a file from ftp server.

Jars required: commons-net-1.4.1.jar

Can be downloaded from: http://commons.apache.org/net/download_net.cgi

API required: http://commons.apache.org/net/apidocs/org/apache/commons/net/ftp/FTPClient.html

import java.io.FileOutputStream;

import java.io.OutputStream;

import org.apache.commons.net.ftp.FTP;

import org.apache.commons.net.ftp.FTPClient;

import org.apache.commons.net.ftp.FTPReply;

public class DownloadFromFtp {

      public static void main(String[] args) {

            DownloadFromFtp downloadFTP = new DownloadFromFtp();

            downloadFTP.downloadFromFTP();

      }

      private void downloadFromFTP() {

            try {

                  FTPClient ftpClient = new FTPClient();

                  // This is the file name to be downloaded

                  String fileName = "demo.txt";

                  // This is the ftp server details to be connected

                  ftpClient.connect("ftpserverlocation");

                  int replyCode = ftpClient.getReplyCode();

                  if (!FTPReply.isPositiveCompletion(replyCode)) {

                        System.out.println("Server DOwn");

                  }

                  // Credentials to login into the ftp server.

                  boolean login = ftpClient.login("username", "password");

                  // A particular directory where the file exists

                  boolean changeWorkingDirectory = ftpClient

                              .changeWorkingDirectory("ftpdirectory");

                  boolean setFileType = ftpClient.setFileType(FTP.BINARY_FILE_TYPE);

                  ftpClient.enterLocalPassiveMode();

                  OutputStream data = (OutputStream) new FileOutputStream(fileName);

                  // Actually retrieving the file

                  ftpClient.retrieveFile(fileName, data);

            } catch (Exception e) {

                  e.printStackTrace();

            }

      }

}