Apache commons FTPClient Java example - Send a file to server

FTPClient encapsulates all the functionality necessary to store and retrieve files from an FTP server. This class takes care of all low level details of interacting with an FTP server and provides a convenient higher level interface. You must first connect to the server with connect before doing anything, and finally disconnect after you're completely finished interacting with the server. Then you need to check the FTP reply code to see if the connection was successful. Here is an example that takes a file and send its to the FTP server.

Please download the jar file from the Apache commons Website given below and add to your project Java build path.
http://commons.apache.org/net/download_net.cgi

package com.as400samplecode;

import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Properties;

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

public class SendMyFiles {

    static Properties props;

    public static void main(String[] args) {

        SendMyFiles sendMyFiles = new SendMyFiles();
        if (args.length < 1)
        {
            System.err.println("Usage: java " + sendMyFiles.getClass().getName()+
            " Properties_file File_To_FTP ");
            System.exit(1);
        }

        String propertiesFile = args[0].trim();
        String fileToFTP = args[1].trim();
        sendMyFiles.startFTP(propertiesFile, fileToFTP);

    }

    public boolean startFTP(String propertiesFilename, String fileToFTP){

        props = new Properties();

        try {

            props.load(new FileInputStream("properties/" + propertiesFilename));

            String serverAddress = props.getProperty("serverAddress").trim();
            String userId = props.getProperty("userId").trim();
            String password = props.getProperty("password").trim();
            String remoteDirectory = props.getProperty("remoteDirectory").trim();
            String localDirectory = props.getProperty("localDirectory").trim();

            //new ftp client
            FTPClient ftp = new FTPClient();
            //try to connect
            ftp.connect(serverAddress);
            //login to server
            if(!ftp.login(userId, password))
            {
                ftp.logout();
                return false;
            }
            int reply = ftp.getReplyCode();
            //FTPReply stores a set of constants for FTP reply codes. 
            if (!FTPReply.isPositiveCompletion(reply))
            {
                ftp.disconnect();
                return false;
            }

            //enter passive mode
            ftp.enterLocalPassiveMode();
            //get system name
            System.out.println("Remote system is " + ftp.getSystemType());
            //change current directory
            ftp.changeWorkingDirectory(remoteDirectory);
            System.out.println("Current directory is " + ftp.printWorkingDirectory());

            //get input stream
            InputStream input;
            input = new FileInputStream(localDirectory + "/" + fileToFTP);
            //store the file in the remote server
            ftp.storeFile(fileToFTP, input);
            //close the stream
            input.close();

            ftp.logout();
            ftp.disconnect();
        }
        catch (Exception ex)
        {
            ex.printStackTrace();
            return false;
        }
        return true;
    }

}

Source for the properties file ftp.properties

#Properties File FTP to server

serverAddress=ftp.someDomain.com
userId=yourUserId   
password=yourPassword
remoteDirectory=/remote/MyFolder
localDirectory=/local/MyFolder

Recommended Reading

• Apache commons FTPClient Java example - Download files from server