在ActiveMQ Artemis中使用WebSocket的STOMP协议时，可以通过以下步骤设置帧类型：

1. 首先，创建一个ActiveMQ Artemis的WebSocket连接，例如：

import javax.jms.Connection;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.Topic;

import org.apache.activemq.artemis.api.core.TransportConfiguration;
import org.apache.activemq.artemis.api.core.client.ActiveMQClient;
import org.apache.activemq.artemis.api.core.client.ClientMessage;
import org.apache.activemq.artemis.api.core.client.ClientSession;
import org.apache.activemq.artemis.api.core.client.ClientSessionFactory;
import org.apache.activemq.artemis.api.core.client.ServerLocator;
import org.apache.activemq.artemis.api.core.management.ActiveMQServerControl;
import org.apache.activemq.artemis.core.remoting.impl.netty.NettyConnectorFactory;
import org.apache.activemq.artemis.core.remoting.impl.netty.TransportConstants;
import org.apache.activemq.artemis.core.server.ActiveMQServer;
import org.apache.activemq.artemis.core.server.embedded.EmbeddedActiveMQ;

public class StompWebSocketExample {

    public static void main(String[] args) throws Exception {

        // Create an embedded ActiveMQ server
        ActiveMQServer server = new EmbeddedActiveMQ();
        server.start();

        // Create a STOMP over WebSocket connection
        ServerLocator serverLocator = ActiveMQClient.createServerLocatorWithoutHA(new TransportConfiguration(NettyConnectorFactory.class.getName()));
        serverLocator.getStaticTransportConfigurations().get(0).getParams().put(TransportConstants.PORT_PROP_NAME, 61614);
        serverLocator.getStaticTransportConfigurations().get(0).getParams().put(TransportConstants.PROTOCOLS_PROP_NAME, "STOMP");
        serverLocator.getStaticTransportConfigurations().get(0).getParams().put(TransportConstants.WS_PATH, "/stomp-websocket");
        Connection connection = serverLocator.createConnection();

        // Start the connection
        connection.start();

        // Create a session
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

        // Create a destination (e.g. queue or topic)
        Topic destination = session.createTopic("exampleTopic");

        // Create a producer
        MessageProducer producer = session.createProducer(destination);

        // Create a STOMP frame (e.g. SEND frame)
        TextMessage message = session.createTextMessage();
        message.setText("Hello, ActiveMQ Artemis!");
        message.setStringProperty("customProperty", "customValue");

        // Set the frame type to SEND
        message.setStringProperty("AMQSTOMP_FRAME_TYPE", "SEND");

        // Send the message
        producer.send(message);

        // Create a consumer
        MessageConsumer consumer = session.createConsumer(destination);

        // Receive a message
        Message receivedMessage = consumer.receive();

        // Print the message content
        if (receivedMessage instanceof TextMessage) {
            TextMessage receivedTextMessage = (TextMessage) receivedMessage;
            System.out.println("Received message: " + receivedTextMessage.getText());
        }

        // Close the consumer, producer, session, and connection
        consumer.close();
        producer.close();
        session.close();
        connection.close();

        // Stop the embedded ActiveMQ server
        server.stop();
    }
}

在上述代码中，我们创建了一个使用STOMP协议的WebSocket连接，并设置了帧类型为SEND。

请注意，上述示例仅用于演示目的，实际使用时可能需要根据自己的需求进行适当的修改。