Spring Kafka Config blog

application.yml

kafka:
  topics:
    -
      name: testing-auto-setup
      num-partitions: 5
      replication-factor: 1
    -
      name: another-test
      num-partitions: 3
      replication-factor: 1

TopicConfigurations.java

@Configuration
@ConfigurationProperties(prefix = "kafka")
class TopicConfigurations {
   List<TopicConfiguration> topics;

   static class TopicConfiguration {
      String name;
      Integer numPartitions = 3;
      Short replicationFactor = 1;
      
      NewTopic toNewTopic() {
        return new NewTopic(this.name, this.numPartitions, this.replicationFactor);
      }
   }
}}