<dependency>
<groupId>commons-net</groupId>
<artifactId>commons-net</artifactId>
<version>3.8.0</version>
</dependency>
import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
public class FtpExample {
public static void main(String[] args) {
String server = "ftp.example.com";
int port = 21;
String username = "ftpuser";
String password = "ftppassword";
FTPClient ftpClient = new FTPClient();
try {
ftpClient.connect(server, port);
ftpClient.login(username, password);
ftpClient.logout();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (ftpClient.isConnected()) {
try {
ftpClient.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
File localFile = new File("local.txt");
String remoteFile = "remote.txt";
InputStream inputStream = new FileInputStream(localFile);
boolean uploaded = ftpClient.storeFile(remoteFile, inputStream);
inputStream.close();
if (uploaded) {
} else {
}
String remoteFile = "remote.txt";
File localFile = new File("local.txt");
OutputStream outputStream = new FileOutputStream(localFile);
boolean downloaded = ftpClient.retrieveFile(remoteFile, outputStream);
outputStream.close();
if (downloaded) {
} else {
}
String remoteFile = "remote.txt";
boolean deleted = ftpClient.deleteFile(remoteFile);
if (deleted) {
} else {
}
ftpClient.enterLocalPassiveMode();
ftpClient.enterLocalActiveMode();
ftpClient.setControlEncoding("UTF-8");
