在Spring Boot中配置Kafka，你需要在application.properties或application.yml文件中设置Kafka的基本属性，并且添加必要的依赖。
以下是一个配置Kafka的基本示例：
application.properties配置文件:
spring.kafka.bootstrap-servers=localhost:9092
spring.kafka.consumer.group-id=my-group
spring.kafka.consumer.auto-offset-reset=earliest
spring.kafka.consumer.key-deserializer=org.apache.kafka.common.serialization.StringDeserializer
spring.kafka.consumer.value-deserializer=org.apache.kafka.common.serialization.StringDeserializer
spring.kafka.producer.key-serializer=org.apache.kafka.common.serialization.StringSerializer
spring.kafka.producer.value-serializer=org.apache.kafka.common.serialization.StringSerializer
或者使用application.yml配置文件:
spring:
kafka:
bootstrap-servers: localhost:9092
consumer:
group-id: my-group
auto-offset-reset: earliest
key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
value-deserializer: org.apache.kafka.common.serialization.StringDeserializer
producer:
key-serializer: org.apache.kafka.common.serialization.StringSerializer
value-serializer: org.apache.kafka.common.serialization.StringSerializer
确保你的pom.xml包含了Spring Kafka依赖：
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
<version>2.8.0</version> <!-- Use the appropriate version -->
</dependency>
接下来，你可以创建生产者和消费者来发送和接收消息：
生产者:
@Autowired
private KafkaTemplate<String, String> kafkaTemplate;
public void sendMessage(String topic, String message) {
kafkaTemplate.send(topic, message);
}
消费者:
@Component
@KafkaListener(topics = "your-topic", groupId = "my-group")
public class KafkaConsumer {
@Autowired
private ObjectMapper objectMapper;
public void listen(ConsumerRecord<?, ?> record) {
String message = (String) record.value();
System.out.println("Received message in group 'my-group': " + message);
}
}
确保你的Kafka服务器正在运行，并且你的Spring Boot应用程序可以连接到它。这样你就可以通过生产者发送消息到指定的topic，并通过消费者接收这些消息了。