How to connect to FTP over TLS/SSL (FTPS) server in Java

The SimpleFTP class/library does not support TLS/SSL at all.

Use the FTPSClient class from the Apache Commons Net library instead.

See the official example for the FTPClient class and just substitute the FTPClient with the FTPSClient.

FTPSClient ftpClient = new FTPSClient();
ftpClient.connect(host);
ftpClient.login(user, password);

The FTPSClient class defaults to an explicit TLS/SSL (recommended). In a rare case you need an implicit TLS/SSL, use new FTPSClient(true).

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