Amazon Chime支持通过API实现自动回复和自动消息的功能。需要使用Amazon Chime API，可以使用AWS SDK或RESTful API。

以下是使用AWS SDK for Java的示例代码：

import com.amazonaws.services.chime.AmazonChime;
import com.amazonaws.services.chime.AmazonChimeClientBuilder;
import com.amazonaws.services.chime.model.*;

public class AutoMessagingExample {
    public static void main(String[] args) {
        String meetingId = "abcd1234"; // Replace with your Amazon Chime meeting ID
        String attendeeId = "xyz9876"; // Replace with your Amazon Chime attendee ID

        AmazonChime chime = AmazonChimeClientBuilder.defaultClient();

        // Send a message to the chat for the meeting
        String messageContent = "Hello everyone!";
        SendMessageRequest sendMessageRequest = new SendMessageRequest()
            .withMeetingId(meetingId)
            .withContent(messageContent)
            .withType(MessageType.STANDARD)
            .withSenderAttendeeId(attendeeId);
        chime.sendMessage(sendMessageRequest);

        // Send a message to the individual attendee
        String privateMessageContent = "Hey there!";
        SendAttendeeMessageRequest sendAttendeeMessageRequest = new SendAttendeeMessageRequest()
            .withMeetingId(meetingId)
            .withContent(privateMessageContent)
            .withType(MessageType.STANDARD)
            .withAttendeeId(attendeeId);
        chime.sendAttendeeMessage(sendAttendeeMessageRequest);
    }
}

此代码示例使用Amazon Chime API发送了两条消息，一条是发送给会议中的所有参会者，另一条是发送给特定参会者。可以使用不同的MessageType参数来定义消息类型。通过Amazon Chime API，可以自动执行此代码示例，并在需要时发送消息。