无法在Intellij中创建Kafka生产者对象

<dependency>
    <groupId>org.apache.kafka</groupId>
    <artifactId>kafka-clients</artifactId>
    <version>2.8.0</version>
</dependency>

import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.Producer;
import org.apache.kafka.clients.producer.ProducerRecord;
import import java.util.Properties;

Properties props = new Properties();
props.put("bootstrap.servers", "localhost:9092"); // Kafka服务器地址和端口
props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer"); // 消息键的序列化器
props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer"); // 消息值的序列化器

Producer<String, String> producer = new KafkaProducer<>(props);

String topic = "my-topic"; // Kafka主题名称
String key = "my-key"; // 消息键
String value = "Hello, Kafka!"; // 消息值

ProducerRecord<String, String> record = new ProducerRecord<>(topic, key, value);
producer.send(record);

producer.close(); // 关闭生产者对象