Java使用kafka发送和生产消息的示例_Java教程

Java使用kafka发送和生产消息的示例

2021-04-23 11:57will的猜想 Java教程

本篇文章主要介绍了Java使用kafka发送和生产消息的示例，小编觉得挺不错的，现在分享给大家，也给大家做个参考。一起跟随小编过来看看吧

1. maven依赖包

									<dependency> 

									 <groupid>org.apache.kafka</groupid> 

									 <artifactid>kafka-clients</artifactid> 

									 <version>0.9.0.1</version> 

									</dependency>

2. 生产者代码

									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<string, string> producer = new kafkaproducer<>(props); 

									  for(int i = 0; i < 100; i++) 

									   producer.send(new producerrecord<>("topic1", integer.tostring(i), integer.tostring(i)));   

									  producer.close(); 

									 } 

									}

3. 消费者代码

									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<string, string> consumer = new kafkaconsumer<>(props); 

									  consumer.subscribe(arrays.aslist("topic1")); 

									  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()); 

									  } 

									 } 

									}