Téléchargement sur FTP à l'aide de Java
Je me demandais juste s'il y avait un moyen simple de télécharger un petit fichier sur un serveur ftp. J'ai vérifié Apache Commons Net library mais cela semble assez compliqué pour être honnête. Est-il un moyen plus simple de télécharger un petit fichier sur un ftp?
A fini par utiliser la bibliothèque Apache Commons Net, ce n'était pas trop difficile.
3 answers
À partir de ce lien: Téléchargez des fichiers sur un serveur FTP à l'aide de la classe URLConnection . Aucune bibliothèque externe nécessaire.
String ftpUrl = "ftp://%s:%s@%s/%s;type=i";
String host = "www.myserver.com";
String user = "tom";
String pass = "secret";
String filePath = "E:/Work/Project.zip";
String uploadPath = "/MyProjects/archive/Project.zip";
ftpUrl = String.format(ftpUrl, user, pass, host, uploadPath);
System.out.println("Upload URL: " + ftpUrl);
try {
URL url = new URL(ftpUrl);
URLConnection conn = url.openConnection();
OutputStream outputStream = conn.getOutputStream();
FileInputStream inputStream = new FileInputStream(filePath);
byte[] buffer = new byte[BUFFER_SIZE];
int bytesRead = -1;
while ((bytesRead = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, bytesRead);
}
inputStream.close();
outputStream.close();
System.out.println("File uploaded");
} catch (IOException ex) {
ex.printStackTrace();
}
Je pense que j'ai trouvé un très bon exemple d'utilisation de org. apache. commons. net. ftp. FTPClient ici
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
/**
* A program that demonstrates how to upload files from local computer
* to a remote FTP server using Apache Commons Net API.
* @author www.codejava.net
*/
public class FTPUploadFileDemo {
public static void main(String[] args) {
String server = "www.myserver.com";
int port = 21;
String user = "user";
String pass = "pass";
FTPClient ftpClient = new FTPClient();
try {
ftpClient.connect(server, port);
ftpClient.login(user, pass);
ftpClient.enterLocalPassiveMode();
ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
// APPROACH #1: uploads first file using an InputStream
File firstLocalFile = new File("D:/Test/Projects.zip");
String firstRemoteFile = "Projects.zip";
InputStream inputStream = new FileInputStream(firstLocalFile);
System.out.println("Start uploading first file");
boolean done = ftpClient.storeFile(firstRemoteFile, inputStream);
inputStream.close();
if (done) {
System.out.println("The first file is uploaded successfully.");
}
// APPROACH #2: uploads second file using an OutputStream
File secondLocalFile = new File("E:/Test/Report.doc");
String secondRemoteFile = "test/Report.doc";
inputStream = new FileInputStream(secondLocalFile);
System.out.println("Start uploading second file");
OutputStream outputStream = ftpClient.storeFileStream(secondRemoteFile);
byte[] bytesIn = new byte[4096];
int read = 0;
while ((read = inputStream.read(bytesIn)) != -1) {
outputStream.write(bytesIn, 0, read);
}
inputStream.close();
outputStream.close();
boolean completed = ftpClient.completePendingCommand();
if (completed) {
System.out.println("The second file is uploaded successfully.");
}
} catch (IOException ex) {
System.out.println("Error: " + ex.getMessage());
ex.printStackTrace();
} finally {
try {
if (ftpClient.isConnected()) {
ftpClient.logout();
ftpClient.disconnect();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
}
La bibliothèque Apache commons a cet utilitaire org.apache.commons.net.ftp.FTPClient
:
import org.apache.commons.net.ftp.FTPClient;
FTPClient client = new FTPClient();
String sFTP = "ftp.miservidor.com";
String sUser = "usuario";
String sPassword = "password";
try {
client.connect(sFTP);
boolean login = client.login(sUser, sPassword);
} catch (IOException ioe) {}
Exemple complet: http://commons.apache.org/proper/commons-net/examples/ftp/FTPClientExample.java