云服务器部署openfire

import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.SmackException;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.chat2.Chat;
import org.jivesoftware.smack.chat2.ChatManager;
import org.jivesoftware.smack.packet.Message;
import org.jxmpp.jid.EntityBareJid;
import org.jxmpp.jid.impl.JidCreate;

public class OpenfireExample {
    public static void main(String[] args) {
        ConnectionConfiguration config = new ConnectionConfiguration("your-server-address", 5222);
        config.setSecurityMode(ConnectionConfiguration.SecurityMode.disabled);

        try {
            org.jivesoftware.smack.XMPPConnection connection = new org.jivesoftware.smack.XMPPConnection(config);
            connection.connect();
            connection.login("username", "password");

            ChatManager chatManager = ChatManager.getInstanceFor(connection);
            EntityBareJid jid = JidCreate.entityBareFrom("recipient@your-domain");
            Chat chat = chatManager.chatWith(jid);

            Message message = new Message();
            message.setBody("Hello, World!");
            chat.send(message);

            connection.disconnect();
        } catch (SmackException | IOException | XMPPException | InterruptedException e) {
            e.printStackTrace();
        }
    }
}