@EnableKafka

@Configuration

public class KafkaConsumerConfig {

​

    @Bean

    public ConsumerFactory<String, String> consumerFactory() {

        Map<String, Object> props = new HashMap<>();

        props.put(

          ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, 

          bootstrapAddress);

        props.put(

          ConsumerConfig.GROUP_ID_CONFIG, 

          groupId);

        props.put(

          ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, 

          StringDeserializer.class);

        props.put(

          ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, 

          StringDeserializer.class);

        return new DefaultKafkaConsumerFactory<>(props);

    }

​

    @Bean

    public ConcurrentKafkaListenerContainerFactory<String, String> 

      kafkaListenerContainerFactory() {

        ConcurrentKafkaListenerContainerFactory<String, String> factory =

          new ConcurrentKafkaListenerContainerFactory<>();

        factory.setConsumerFactory(consumerFactory());

        return factory;

    }

}