Java – Get List of Files from FTP Server

import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.io.FileUtils;
import java.io.IOException;

public class Main {

	public static void main(String[] args) {
		FTPClient client = new FTPClient();

		client.connect("ftp.domain.com");
		client.login("admin", "secret");

		String[] names = client.listNames();
		for (String name : names) {
			System.out.println("Name = " + name);
		}

		FTPFile[] ftpFiles = client.listFiles();
		for (FTPFile ftpFile : ftpFiles) {
			// Check if FTPFile is a regular file
			if (ftpFile.getType() == FTPFile.FILE_TYPE) {
				System.out.println("FTPFile: " + ftpFile.getName() + "; "
						+ FileUtils.byteCountToDisplaySize(ftpFile.getSize()));
			}
		}
		client.logout();
		client.disconnect();
	}

}

Java – Upload File to FTP Server

import org.apache.commons.net.ftp.FTPClient;
import java.io.FileInputStream;
import java.io.IOException;

public class Main {

	public static void main(String[] args) {
		FTPClient client = new FTPClient();
		FileInputStream fis = null;

		client.connect("ftp.domain.com");
		client.login("admin", "secret");

		String filename = "Touch.dat";
		fis = new FileInputStream(filename);
		client.storeFile(filename, fis);
		client.logout();
		fis.close();
	}

}

Java – Connect to FTP Server

import org.apache.commons.net.ftp.FTPClient;
import java.io.IOException;

public class FtpConnectDemo {

	public static void main(String[] args) {
		FTPClient client = new FTPClient();

		client.connect("ftp.domain.com");
		boolean login = client.login("admin", "secret");

		if (login) {
			System.out.println("Login success...");
			boolean logout = client.logout();
			if (logout) {
				System.out.println("Logout from FTP server...");
			}
		} else {
			System.out.println("Login fail...");
		}
		client.disconnect();
	}

}