引入依赖

  compile 'org.springframework.kafka:spring-kafka'

第一套kafka配置

package myapp.kafka;

import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.common.serialization.StringDeserializer;
import org.apache.kafka.common.serialization.StringSerializer;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory;
import org.springframework.kafka.config.KafkaListenerContainerFactory;
import org.springframework.kafka.core.*;
import org.springframework.kafka.listener.ConcurrentMessageListenerContainer;

import java.util.HashMap;
import java.util.Map;

/**
 * 默认的kafka配置
 *
 * @author zhengqian
 */
@Slf4j
@Configuration
@Data
public class K1KafkaConfiguration {

    @Value("${app-name.kafka.k1.consumer.bootstrap-servers}")
    private String consumerBootstrapServers;

    @Value("${app-name.kafka.k1.consumer.group-id}")
    private String groupId;

    @Value("${app-name.kafka.k1.consumer.auto-offset-reset}")
    private String autoOffsetReset;

    @Value("${app-name.kafka.k1.consumer.enable-auto-commit}")
    private Boolean enableAutoCommit;

    @Value("${app-name.kafka.k2.producer.bootstrap-servers}")
    private String producerBootstrapServers;

    @Bean
    @Primary
    KafkaListenerContainerFactory<ConcurrentMessageListenerContainer<Integer, String>> kafkaListenerContainerFactory() {
        ConcurrentKafkaListenerContainerFactory<Integer, String> factory = new ConcurrentKafkaListenerContainerFactory<>();
        factory.setConsumerFactory(consumerFactory());
        factory.setConcurrency(3);
        factory.getContainerProperties().setPollTimeout(3000);
        return factory;
    }

    @Bean
    public ConsumerFactory<Integer, String> consumerFactory() {
        return new DefaultKafkaConsumerFactory<>(consumerConfigs());
    }

    @Bean
    public Map<String, Object> consumerConfigs() {
        Map<String, Object> props = new HashMap<>();
        props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, consumerBootstrapServers);
        props.put(ConsumerConfig.GROUP_ID_CONFIG, groupId);
        props.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, enableAutoCommit);
        props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, autoOffsetReset);
        props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
        props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
        return props;
    }

    @Bean
    public Map<String, Object> producerConfigs() {
        Map<String, Object> props = new HashMap<>();
        props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, producerBootstrapServers);
        props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
        props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
        return props;
    }

    @Bean
    public ProducerFactory<String, String> producerFactory() {
        return new DefaultKafkaProducerFactory<>(producerConfigs());
    }

    @Bean
    public KafkaTemplate<String, String> kafkaTemplate() {
        return new KafkaTemplate<>(producerFactory());
    }
}

第二套kafka配置

package myapp.kafka;

import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.common.serialization.StringDeserializer;
import org.apache.kafka.common.serialization.StringSerializer;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory;
import org.springframework.kafka.config.KafkaListenerContainerFactory;
import org.springframework.kafka.core.*;
import org.springframework.kafka.listener.ConcurrentMessageListenerContainer;

import java.util.HashMap;
import java.util.Map;

/**
 * 第二套kafka配置
 *
 * @author zhengqian
 */
@Slf4j
@Configuration
@Data
public class K2KafkaConfiguration {

    @Value("${app-name.kafka.k2.consumer.bootstrap-servers}")
    private String consumerBootstrapServers;

    @Value("${app-name.kafka.k2.consumer.group-id}")
    private String groupId;

    @Value("${app-name.kafka.k2.consumer.auto-offset-reset}")
    private String autoOffsetReset;

    @Value("${app-name.kafka.k2.consumer.enable-auto-commit}")
    private Boolean enableAutoCommit;

    @Value("${app-name.kafka.k2.producer.bootstrap-servers}")
    private String producerBootstrapServers;

    @Bean
    KafkaListenerContainerFactory<ConcurrentMessageListenerContainer<Integer, String>> kafkaListenerContainerFactoryK2() {
        ConcurrentKafkaListenerContainerFactory<Integer, String> factory = new ConcurrentKafkaListenerContainerFactory<>();
        factory.setConsumerFactory(consumerFactoryK2());
        factory.setConcurrency(3);
        factory.getContainerProperties().setPollTimeout(3000);
        return factory;
    }

    @Bean
    public ConsumerFactory<Integer, String> consumerFactoryK2() {
        return new DefaultKafkaConsumerFactory<>(consumerConfigsK2());
    }

    @Bean
    public Map<String, Object> consumerConfigsK2() {
        Map<String, Object> props = new HashMap<>();
        props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, consumerBootstrapServers);
        props.put(ConsumerConfig.GROUP_ID_CONFIG, groupId);
        props.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, enableAutoCommit);
        props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, autoOffsetReset);
        props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
        props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
        return props;
    }

    @Bean
    public Map<String, Object> producerConfigsK2() {
        Map<String, Object> props = new HashMap<>();
        props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, producerBootstrapServers);
        props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
        props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
        return props;
    }

    @Bean
    public ProducerFactory<String, String> producerFactoryK2() {
        return new DefaultKafkaProducerFactory<>(producerConfigsK2());
    }

    @Bean
    public KafkaTemplate<String, String> kafkaTemplateK2() {
        return new KafkaTemplate<>(producerFactoryK2());
    }
}

配置文件

app-name:
  kafka:
    k1:
      consumer:
        bootstrap-servers: host1:9092
        group-id: my-app
        auto-offset-reset: earliest
        key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
        value-deserializer: org.apache.kafka.common.serialization.StringDeserializer
        enable-auto-commit: true
      producer:
        bootstrap-servers: host1:9092
        key-serializer: org.apache.kafka.common.serialization.StringSerializer
        value-serializer: org.apache.kafka.common.serialization.StringSerializer
    k2:
      consumer:
        bootstrap-servers: host2:9092
        group-id: my-app
        auto-offset-reset: earliest
        key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
        value-deserializer: org.apache.kafka.common.serialization.StringDeserializer
        enable-auto-commit: true
      producer:
        bootstrap-servers: host2:9092
        key-serializer: org.apache.kafka.common.serialization.StringSerializer
        value-serializer: org.apache.kafka.common.serialization.StringSerializer

指定消费的kafka集群

    @KafkaListener(topics = "topic-name", containerFactory = "kafkaListenerContainerFactoryK2")
    public void onEvent(ConsumerRecord<String, String> record) {
        // 省略
    }

指定生产者发生的kafka集群

public class KafkaTest {

    @Autowired
    private KafkaTemplate<String, String> kafkaTemplate;

    @Test
    public void test() {
        ListenableFuture<SendResult<String, String>> result = kafkaTemplate.send("topic", "data");
        try {
            SendResult<String, String> value = result.get(2, TimeUnit.SECONDS);
            System.out.println(value.getProducerRecord());
            System.out.println(value.getRecordMetadata());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}