Kafka多线程Consumer的实例代码

这里要根据自身需求开发，我这里只举一个简单的例子，就是几个分区就启动几个consumer，一一对应。三个类：Main：public static void main(String[] args) {		String bootstrapServers = "kafka01:9092，kafka02:9092";		String groupId = "test";		String topic = "testtopic";		int consumerNum = 3;		ConsumerGroup cg = new ConsumerGroup(consumerNum,bootstrapServers,groupId,topic);		cg.execute();}import java.util.ArrayList;import java.util.List;public class ConsumerGroup {	private List<ConsumerRunnable> consumers;	public ConsumerGroup(int consumerNum,String bootstrapServers,String groupId,String topic){		consumers = new ArrayList<>(consumerNum);		for(int i=0;i < consumerNum;i++){			ConsumerRunnable ConsumerRunnable = new ConsumerRunnable(bootstrapServers,groupId,topic);			consumers.add(ConsumerRunnable);		}	}	public void execute(){		for(ConsumerRunnable consumerRunnable:consumers){			new Thread(consumerRunnable).start();		}	}}import java.util.Arrays;import java.util.Properties;import org.apache.kafka.clients.consumer.ConsumerRecord;import org.apache.kafka.clients.consumer.ConsumerRecords;import org.apache.kafka.clients.consumer.KafkaConsumer;public class ConsumerRunnable implements Runnable{	private final KafkaConsumer<String,String> consumer;	public ConsumerRunnable(String bootstrapServers,String groupId,String topic){		Properties props = new Properties();props.put("bootstrap.servers", bootstrapServers);props.put("group.id", groupId);props.put("enable.auto.commit", "true");props.put("auto.commit.interval.ms", "1000");props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");props.put("auto.offset.reset","earliest");this.consumer = new KafkaConsumer<>(props);consumer.subscribe(Arrays.asList(topic));	}	@Override	public void run() {while (true) {ConsumerRecords<String, String> records = consumer.poll(10);for (ConsumerRecord<String, String> record : records) {	System.out.printf("offset = %d, key = %s, value = %s%n", record.offset(), record.key(), record.value());}}	}}