1.引入依赖
XML
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-clients</artifactId>
<version>2.3.1</version>
</dependency>
2.搭建生产者
java
package com.wen.kafka;
import org.apache.kafka.clients.producer.*;
import org.apache.kafka.common.serialization.StringSerializer;
import java.util.Properties;
import java.util.concurrent.ExecutionException;
public class MyProducer {
public static void main(String[] args) throws ExecutionException, InterruptedException {
//配置信息
Properties prop = new Properties();
prop.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "192.168.117.80:9092");
prop.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
prop.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
//创建生产者
Producer<String,String> producer = new KafkaProducer<String, String>(prop);
//创建消息
ProducerRecord<String,String> record = new ProducerRecord<>("test", "hello kafka-client");
//同步发送消息
// RecordMetadata metadata = producer.send(record).get();
// System.out.println("同步消息------topic:"+metadata.topic()+"partition"+metadata.partition()+"offset"+metadata.offset());
//异步发送消息
producer.send(record, new Callback() {
@Override
public void onCompletion(RecordMetadata recordMetadata, Exception e) {
if (e != null) {
System.out.println(e.getMessage());
}
if (recordMetadata != null) {
System.out.println("异步消息------topic:"+recordMetadata.topic()+"partition"+recordMetadata.partition()+"offset"+recordMetadata.offset());
}
}
});
Thread.sleep(1000);
}
}
3.搭建消费者
java
package com.wen.kafka;
import org.apache.kafka.clients.consumer.*;
import org.apache.kafka.common.serialization.StringDeserializer;
import java.time.Duration;
import java.util.Arrays;
import java.util.Properties;
public class MyConsumer {
public static void main(String[] args) {
//参数信息
Properties prop = new Properties();
prop.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,"192.168.117.80:9092");
prop.put(ConsumerConfig.GROUP_ID_CONFIG,"testGroup");
prop.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class.getName());
prop.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG,StringDeserializer.class.getName());
//创建消费者
Consumer<String,String> consumer = new KafkaConsumer<String, String>(prop);
//订阅主题
consumer.subscribe(Arrays.asList("test"));
//拉取消息
while (true){
ConsumerRecords<String, String> records = consumer.poll(Duration.ofMillis(1000));
for (ConsumerRecord<String, String> record : records) {
System.out.println(record.value());
}
}
}
}