Springboot集成kafka

环境配置

maven依赖如下其余依赖根据业务自行配置

xml 复制代码

		<dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka</artifactId>
            <version>3.1.3</version>
            <exclusions>
                <exclusion>
                    <groupId>org.apache.kafka</groupId>
                    <artifactId>kafka-clients</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.kafka</groupId>
            <artifactId>kafka-clients</artifactId>
            <version>4.0.1</version> <!-- 与你的 Kafka 服务端版本一致 -->
        </dependency>
        <dependency>
            <groupId>org.jspecify</groupId>
            <artifactId>jspecify</artifactId>
            <version>1.0.0</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
            <version>6.1.4</version> <!-- 3.2.3对应的固定版本 -->
            <scope>compile</scope> <!-- 强制编译+运行时包含 -->
        </dependency>

application.yml

yaml 复制代码

spring:
  kafka:
#    bootstrap-servers: localhost:9092,localhost:9094,localhost:9096
    bootstrap-servers: localhost:9092
    # 生产者配置
    producer:
      # 消息Key/Value的序列化方式（必须和消费者反序列化对应）
      key-serializer: org.apache.kafka.common.serialization.StringSerializer
      value-serializer: org.apache.kafka.common.serialization.StringSerializer
      # 消息确认机制：all=所有副本确认（最高可靠性，生产环境推荐）
      acks: all
      # 重试次数：发送失败时重试3次
      retries: 3
      # 批次大小：16KB（批量发送提升性能）
      batch-size: 16384
      # 缓冲区大小：32MB
      buffer-memory: 33554432

    # 消费者配置
    consumer:
      # 消息Key/Value的反序列化方式
      key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
      value-deserializer: org.apache.kafka.common.serialization.StringDeserializer
      # 消费者组ID（必填，同一组内的消费者负载均衡消费）
      group-id: springboot-kafka-group
      # 消费起始位置：earliest=从最开始消费；latest=从最新消息消费
      auto-offset-reset: earliest
      # 关闭自动提交偏移量（手动提交更安全，避免重复消费）
      enable-auto-commit: true
      auto-commit-interval: 1000

生产者producer

java 复制代码

   @Resource
    private KafkaTemplate<String, String> kafkaTemplate;
/**
     * 异步发送消息（带消息Key：相同Key的消息会进入同一个分区，保证有序）
     * @param topic 主题名
     * @param key 消息Key
     * @param message 消息内容
     */
    public void sendMessageAsyncWithKey(String topic, String key, String message) {
        ProducerRecord<String, String> record = new ProducerRecord<>(topic, key, message);
        CompletableFuture<SendResult<String, String>> future = kafkaTemplate.send(record);
        future.thenAcceptAsync(new Consumer<SendResult<String, String>>() {
            @Override
            public void accept(SendResult<String, String> stringStringSendResult) {
                System.out.println(stringStringSendResult.getProducerRecord());
                System.out.println(stringStringSendResult.getRecordMetadata());
            }
        });
    }

消费者consumer

java 复制代码

@KafkaListener( topics = "test-springboot-topic",
            groupId = "springboot-kafka-group"
           )
    public void consumeMessage(ConsumerRecord<String, String> record) {
        System.out.println("消费到消息：" + record.value() );
    }

创建topic

java 复制代码

import org.apache.kafka.clients.admin.Admin;
import org.apache.kafka.clients.admin.AdminClientConfig;
import org.apache.kafka.clients.admin.CreateTopicsResult;
import org.apache.kafka.clients.admin.NewTopic;

import java.util.Collections;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutionException;

public class AdminTopicTest {
    public static void main(String[] args) throws ExecutionException, InterruptedException {
        Map<String,Object> configMap = new ConcurrentHashMap<>();
        configMap.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG,"127.0.0.1:9092,127.0.0.1:9094,127.0.0.1:9096");
        Admin admin = Admin.create(configMap);
        //设置topic的名称 分区数 副本数
        NewTopic topic = new NewTopic("test111",3,(short) 3);
        CreateTopicsResult topics = admin.createTopics(Collections.singleton(topic));
        admin.close();
    }
}