如何在单个kafka主题的所有分区中写入相同的消息？

import org.apache.kafka.clients.producer.*;

import java.util.Properties;

public class KafkaProducerExample {
    public static void main(String[] args) {
        // 配置Kafka生产者
        Properties props = new Properties();
        props.put("bootstrap.servers", "kafka-brokers");
        props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
        props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");

        // 创建Kafka生产者实例
        Producer<String, String> producer = new KafkaProducer<>(props);

        // 获取目标主题的所有分区列表
        String topic = "your-topic";
        int numPartitions = producer.partitionsFor(topic).size();

        // 发送相同的消息到所有分区
        String message = "Hello Kafka!";
        for (int partition = 0; partition < numPartitions; partition++) {
            // 发送消息到指定分区，或者使用 new ProducerRecord<>(topic, message) 自动选择分区
            producer.send(new ProducerRecord<>(topic, partition, null, message),
                    new Callback() {
                        @Override
                        public void onCompletion(RecordMetadata metadata, Exception exception) {
                            if (exception != null) {
                                System.err.println("Failed to send message to partition " + metadata.partition());
                                exception.printStackTrace();
                            } else {
                                System.out.println("Sent message to partition " + metadata.partition());
                            }
                        }
                    });
        }

        // 关闭Kafka生产者实例
        producer.close();
    }
}