如何在不使用Kafka的JsonSerializer的情况下向kafka生成JSON对象

import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerRecord;

import com.fasterxml.jackson.databind.ObjectMapper;

public class KafkaJsonProducer {
    public static void main(String[] args) {
        // Kafka配置
        String bootstrapServers = "localhost:9092";
        String topic = "your_topic_name";

        // 创建Kafka生产者
        Properties props = new Properties();
        props.put("bootstrap.servers", bootstrapServers);
        props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
        props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
        KafkaProducer<String, String> producer = new KafkaProducer<>(props);

        try {
            // 构建JSON对象
            ObjectMapper objectMapper = new ObjectMapper();
            ObjectNode json = objectMapper.createObjectNode();
            json.put("key1", "value1");
            json.put("key2", "value2");

            // 将JSON对象转换为字符串
            String jsonString = objectMapper.writeValueAsString(json);

            // 发送消息到Kafka
            ProducerRecord<String, String> record = new ProducerRecord<>(topic, jsonString);
            producer.send(record);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            producer.close();
        }
    }
}