Getting Positive Completion reply from FTP Server using Java
package com.simplecode.com; import java.io.IOException; import org.apache.commons.net.ftp.FTPClient; import org.apache.commons.net.ftp.FTPConnectionClosedException; public class FtpLogin { public static void main(String[] args) throws IOException { FTPClient ftpClient = new FTPClient(); String errorMessage = null; boolean result; try { // Connect to the localhost ftpClient.connect("localhost"); int reply = ftpClient.getReplyCode(); if (!FTPReply.isPositiveCompletion(reply)) { errorMessage ="FTP server refused connection:" + ftpClient.getReplyString(); } else { // login to ftp server result = ftpClient.login("admin", "admin"); if (result == true) { System.out.println("Successfully logged in!"); } else { System.out.println("Login Fail!"); return; } } }catch (FTPConnectionClosedException e) { e.printStackTrace(); } finally { try { ftpClient.disconnect(); } catch (FTPConnectionClosedException e) { System.out.println(e); } } } }
The function ftpClient.getReplyCode(); is used to get reply code on sending ftp connection, and the command FTPReply.isPositiveCompletion(reply) is used to check weather the reply code is positive or not.