如何创建自定义邀请消息加入聊天室- smack

import org.jivesoftware.smack.*;
import org.jivesoftware.smack.chat.Chat;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.tcp.XMPPTCPConnection;
import org.jivesoftware.smackx.muc.MultiUserChat;

public class ChatRoomInviteExample {
    public static void main(String[] args) {
        // 连接到XMPP服务器
        AbstractXMPPConnection connection = new XMPPTCPConnection("your_username", "your_password", "xmpp_server_address");

        try {
            connection.connect();
            connection.login();

            // 加入聊天室
            MultiUserChat chatRoom = MultiUserChatManager.getInstanceFor(connection).getMultiUserChat("chatroom_jid");
            chatRoom.join("your_nickname");

            // 创建邀请消息
            Message inviteMessage = new Message();
            inviteMessage.setBody("你好！欢迎加入聊天室。");

            // 发送邀请消息
            chatRoom.sendMessage(inviteMessage);

            // 关闭连接
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}