George2: Created page with " import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; im..."

2020-01-26T09:05:48Z

Created page with "<source lang="java"> import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; im..."

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<source lang="java">

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
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 demonstrates how to upload files from local computer to a remote
* FTP server using Apache Commons Net API.
* @author www.codejava.net
*/
public class FTPDownloadFileDemo {

public static void main(String[] args) {
String server = "localhost";
int port = 21;
String user = "muppet";
String pass = "puppet";

FTPClient ftpClient = new FTPClient();
try {

ftpClient.connect(server, port);
ftpClient.login(user, pass);
ftpClient.enterLocalPassiveMode();
ftpClient.setFileType(FTP.BINARY_FILE_TYPE);

// APPROACH #1: using retrieveFile(String, OutputStream)
String remoteFile1 = "testfile";
File downloadFile1 = new File("/home/george2/testfile");
OutputStream outputStream1 = new BufferedOutputStream(new FileOutputStream(downloadFile1));
boolean success = ftpClient.retrieveFile(remoteFile1, outputStream1);
outputStream1.close();

if (success) {
System.out.println("File #1 has been downloaded successfully.");
}

// APPROACH #2: using InputStream retrieveFileStream(String)
String remoteFile2 = "song.mp3";
File downloadFile2 = new File("/home/george2/song.mp3");
OutputStream outputStream2 = new BufferedOutputStream(new FileOutputStream(downloadFile2));
InputStream inputStream = ftpClient.retrieveFileStream(remoteFile2);
byte[] bytesArray = new byte[4096];
int bytesRead = -1;
while ((bytesRead = inputStream.read(bytesArray)) != -1) {
outputStream2.write(bytesArray, 0, bytesRead);
}

success = ftpClient.completePendingCommand();
if (success) {
System.out.println("File #2 has been downloaded successfully.");
}
outputStream2.close();
inputStream.close();

} 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();
}
}
}
}

</source>

Source for the ftp download client - Revision history

George2: Created page with " import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; im..."