Java使用kafka发送和生产消息的示例

  org.apache.kafkakafka-clients0.9.0.1

 package com.lnho.example.kafka; import org.apache.kafka.clients.producer.KafkaProducer; import org.apache.kafka.clients.producer.Producer; import org.apache.kafka.clients.producer.ProducerRecord; import java.util.Properties; public class KafkaProducerExample { public static void main(String[] args) { Properties props = new Properties(); props.put("bootstrap.servers", "master:9092"); props.put("acks", "all"); props.put("retries", 0); props.put("batch.size", 16384); props.put("linger.ms", 1); props.put("buffer.memory", 33554432); props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer"); props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer"); Producer producer = new KafkaProducer<>(props); for(int i = 0; i <100; i++) producer.send(new ProducerRecord<>("topic1", Integer.toString(i), Integer.toString(i))); producer.close(); } } 

 package com.lnho.example.kafka; import org.apache.kafka.clients.consumer.ConsumerRecord; import org.apache.kafka.clients.consumer.ConsumerRecords; import org.apache.kafka.clients.consumer.KafkaConsumer; import java.util.Arrays; import java.util.Properties; public class KafkaConsumerExample { public static void main(String[] args) { Properties props = new Properties(); props.put("bootstrap.servers", "master:9092"); props.put("group.id", "test"); props.put("enable.auto.commit", "true"); props.put("auto.commit.interval.ms", "1000"); props.put("session.timeout.ms", "30000"); props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer"); props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer"); KafkaConsumer consumer = new KafkaConsumer<>(props); consumer.subscribe(Arrays.asList("topic1")); while (true) { ConsumerRecords records = consumer.poll(100); for (ConsumerRecord record : records) System.out.printf("offset = %d, key = %s, value = %s\n", record.offset(), record.key(), record.value()); } } }