消息推送系统

// 生产者代码示例

import org.apache.kafka.clients.producer.KafkaProducer;

import org.apache.kafka.clients.producer.ProducerRecord;

Properties props = new Properties();

props.put("bootstrap.servers", "localhost:9092");

props.put("acks", "all");

props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");

props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");

在线排课系统

KafkaProducer producer = new KafkaProducer<>(props);

producer.send(new ProducerRecord<>("proxy-price", "key", "value"));

producer.close();

// 消费者代码示例

import org.apache.kafka.clients.consumer.ConsumerRecord;

import org.apache.kafka.clients.consumer.ConsumerRecords;

import org.apache.kafka.clients.consumer.KafkaConsumer;

Properties props = new Properties();

props.put("bootstrap.servers", "localhost:9092");

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 consumer = new KafkaConsumer<>(props);

consumer.subscribe(Arrays.asList("proxy-price"));

while (true) {

ConsumerRecords records = consumer.poll(Duration.ofMillis(100));

for (ConsumerRecord record : records)

System.out.printf("offset = %d, key = %s, value = %s%n", record.offset(), record.key(), record.value());

}