我如何将KAFKA的属性外部化到一个不同的类中，并将其调用到主类？

// KafkaConfig.java
public class KafkaConfig {
    private String kafkaServerAddress;
    private String topicName;
    private String consumerGroupId;

    public void setKafkaServerAddress(String kafkaServerAddress) {
        this.kafkaServerAddress = kafkaServerAddress;
    }

    public String getKafkaServerAddress() {
        return kafkaServerAddress;
    }

    public void setTopicName(String topicName) {
        this.topicName = topicName;
    }

    public String getTopicName() {
        return topicName;
    }

    public void setConsumerGroupId(String consumerGroupId) {
        this.consumerGroupId = consumerGroupId;
    }

    public String getConsumerGroupId() {
        return consumerGroupId;
    }
}

// MainClass.java
public class MainClass {
    public static void main(String[] args) {
        KafkaConfig kafkaConfig = new KafkaConfig();
        kafkaConfig.setKafkaServerAddress("kafka.example.com:9092");
        kafkaConfig.setTopicName("my-topic");
        kafkaConfig.setConsumerGroupId("my-consumer-group");

        String kafkaServerAddress = kafkaConfig.getKafkaServerAddress();
        String topicName = kafkaConfig.getTopicName();
        String consumerGroupId = kafkaConfig.getConsumerGroupId();

        // 使用获取到的Kafka属性值进行后续操作
        // ...
    }
}