Kafka中发送ProducerRecord所需的串行器类型

import org.apache.kafka.clients.producer.*;
import org.apache.kafka.common.serialization.StringSerializer;

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(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "kafka-broker1:9092,kafka-broker2:9092");
        props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
        props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());

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

        // 创建ProducerRecord并发送消息
        String topic = "my-topic";
        String key = "key1";
        String value = "Hello, Kafka!";
        ProducerRecord<String, String> record = new ProducerRecord<>(topic, key, value);
        producer.send(record, new Callback() {
            @Override
            public void onCompletion(RecordMetadata metadata, Exception exception) {
                if (exception != null) {
                    System.err.println("Failed to send message: " + exception.getMessage());
                } else {
                    System.out.println("Message sent successfully. Offset: " + metadata.offset());
                }
            }
        });

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