请构建个Kafka工程
时间: 2023-07-30 08:11:38 浏览: 61
好的,下面是一个简单的 Kafka 工程示例,包括生产者和消费者:
1. 首先,需要在 Maven 中添加以下依赖:
```xml
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-clients</artifactId>
<version>2.8.0</version>
</dependency>
```
2. 创建生产者
```java
import java.util.Properties;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerRecord;
public class KafkaProducerExample {
public static void main(String[] args) {
Properties props = new Properties();
props.put("bootstrap.servers", "localhost:9092");
props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
KafkaProducer<String, String> producer = new KafkaProducer<>(props);
String topic = "my-topic";
String message = "Hello, World!";
ProducerRecord<String, String> record = new ProducerRecord<>(topic, message);
producer.send(record);
producer.close();
}
}
```
3. 创建消费者
```java
import java.util.Properties;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import java.time.Duration;
import java.util.Arrays;
public class KafkaConsumerExample {
public static void main(String[] args) {
Properties props = new Properties();
props.put("bootstrap.servers", "localhost:9092");
props.put("group.id", "my-group");
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);
String topic = "my-topic";
consumer.subscribe(Arrays.asList(topic));
while (true) {
ConsumerRecords<String, String> records = consumer.poll(Duration.ofMillis(100));
for (ConsumerRecord<String, String> record : records) {
System.out.printf("offset = %d, key = %s, value = %s%n",
record.offset(), record.key(), record.value());
}
}
}
}
```
以上就是一个简单的 Kafka 工程示例,实现了生产者和消费者的基本功能。需要注意的是,这只是一个最小化的示例,实际应用中需要根据需求进行适当的配置和优化。
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