spring 整合kafka监听消费的配置过程

 <dependency>
      <groupId>org.springframework.kafka</groupId>
      <artifactId>spring-kafka</artifactId>
      <version>2.2.0.RELEASE</version>
    </dependency>

<!-- consumer configuration 该配置项可以根据自己业务的实际需求做增加或删除-->
  <bean id="consumerProperties" class="java.util.HashMap">
    <constructor-arg>
      <map>
        <entry key="bootstrap.servers" value="${kafka.bootstrap.servers}" />
        <entry key="group.id" value="group" />
        <entry key="enable.auto.commit" value="true" />
        <entry key="auto.commit.interval.ms" value="3000" />
        <entry key="session.timeout.ms" value="10000" />
        <entry key="key.deserializer"
            value="org.apache.kafka.common.serialization.StringDeserializer" />
        <entry key="value.deserializer"
            value="org.apache.kafka.common.serialization.StringDeserializer" />
      </map>
    </constructor-arg>
  </bean>

  <!-- create factory 该类是spring jar包里提供，就这么配置-->
  <bean id="consumerFactory" class="org.springframework.kafka.core.DefaultKafkaConsumerFactory">
    <constructor-arg>
      <ref bean="consumerProperties" />
    </constructor-arg>
  </bean>

  <!-- 自定义的消费类，需要实现spring的接口 -->
  <bean id="payPalConsumer"
     class="com.chao.service.consumer.PayPalConsumer" />

  <!-- 该类也是jar包里提供的，注入的监听类是自己定义的，topic名称是配置文件引入的-->
  <bean id="containerProperties" class="org.springframework.kafka.listener.ContainerProperties">
    <constructor-arg name="topics" value="${kafka.paypal.topic.name}"/>
    <property name="messageListener" ref="payPalConsumer" />
  </bean>

  <!-- 改类也是jar里提供的，把这个containerProperties和consumerfactory 注入 -->
  <bean id="messageListenerContainer" class="org.springframework.kafka.listener.KafkaMessageListenerContainer"
     init-method="doStart">
    <constructor-arg ref="consumerFactory" />
    <constructor-arg ref="containerProperties" />
  </bean>

/**
 * get msg from kafka
 */
@Component 
public class PayPalConsumer implements MessageListener<String, String> {

  private static Logger logger = LoggerFactory.getLogger(PayPalConsumer.class);
  @Autowired
  private XXService XXService;
  @Override
  public void onMessage(ConsumerRecord<String, String> authorizeRecord) {
    String value = authorizeRecord.value();
    if (StringUtils.isEmpty(value)){
      logger.warn("receive message from kafka is null");
      return;
    }
    logger.info("receive message from kafka is {}",value);
  }
}