Kafka Consumer实例

  1. 参考Kafka官方Documentation的第2章,导入Consumer的pom依赖,参考javadoc的提示,书写如下代码
package com.github.memorylorry;

import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.common.TopicPartition;

import java.util.Arrays;
import java.util.Properties;

public class ConsumerDemo {
    public static void main(String[] args){
        Properties props = new Properties();
        props.put("bootstrap.servers", "192.168.32.141:9091,192.168.32.141:9092,192.168.32.141:9093");
        props.put("group.id", "test");
        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");
        KafkaConsumer<String,String> consumer = new KafkaConsumer<String, String>(props);

        //指定主题和分区
        TopicPartition partition0 = new TopicPartition("mark", 0);
        consumer.assign(Arrays.asList(partition0));

        while (true) {
            ConsumerRecords<String, String> records = consumer.poll(100);
            for (ConsumerRecord<String, String> record : records)
                System.out.printf("offset = %d, key = %s, value = %s%n", record.offset(), record.key(), record.value());
        }
    }
}