2017 08.31 09:27 Networking in Java - New Series: FTP

I am now trying to connect to an external FTP server to send files. 

https://www.baeldung.com/java-ftp-client

This is quite hard as it is an external server, and I have to use premade classes.

I will be trying very hard though.

Following the steps, I wrote a class for FTP connections, and first made an abstraction API for the Apache Net FTP Client.

I will still have to read the reply from the FTP Server, and print the replies so that I can test it.

class FtpClient {
    private String server;
    private int port;
    private String user;
    private String password;
    private FTPClient ftp;
    void open() throws IOException {
        ftp = new FTPClient();
        ftp.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out)));
        ftp.connect(server, port);
        int reply = ftp.getReplyCode();
        if (!FTPReply.isPositiveCompletion(reply)) {
            ftp.disconnect();
            throw new IOException("Exception in connecting to FTP Server");
        }
        ftp.login(user, password);
    }
    void close() throws IOException {
        ftp.disconnect();
    }
}