springboot集成kafka

1、引入依赖

      <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka</artifactId>
            <version>2.8.6</version>
        </dependency>

2、配置

server:
  port: 9099
spring:
  kafka:
    bootstrap-servers: 192.168.157.101:9092
    consumer:
      group-id: test-consumer-group
      max-poll-records: 10
      concurrency: 10
      #Kafka中没有初始偏移或如果当前偏移在服务器上不再存在时,默认区最新 ，有三个选项 【latest, earliest, none】
      auto-offset-reset: earliest
      #是否开启自动提交
      enable-auto-commit: false
      ack-mode: MANUAL_IMMEDIATE
      #自动提交的时间间隔
      auto-commit-interval: 1000
      #key的解码方式
      key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
      #value的解码方式
      value-deserializer: org.apache.kafka.common.serialization.StringDeserializer
      properties:
        batch-listener: true

    producer:
      batch-size: 4096
      buffer-memory: 40960
      retries: 1
      value-serializer: org.apache.kafka.common.serialization.StringSerializer
      key-serializer: org.apache.kafka.common.serialization.StringSerializer
    listener:
      #创建多少个consumer，值必须小于等于Kafk Topic的分区数。
      ack-mode: MANUAL_IMMEDIATE
      concurrency: 1  #推荐设置为topic的分区数

3、测试

    @Autowired
    KafkaTemplate<String,String> kafkaTemplate;
    @Test
    void contextLoads() {
        for (int i = 0; i < 100; i++) {
            kafkaTemplate.send("hello","hello"+i);
        }

    }

如日志打印：Connection to node 0 (/127.0.0.1:9092)

#进入kafka安装目录
/usr/local/kafka_2.12-3.5.1/config
#编辑配置文件
vim server.properties
    
# 允许外部端口连接                                            
listeners=PLAINTEXT://0.0.0.0:9092  
# 外部代理地址                                                
advertised.listeners=PLAINTEXT://192.168.157.101:9092  

重启kafka服务