SpringBoot链接Kafka

一、SpringBoot生产者

（1）修改SpringBoot核心配置文件application.propeties, 添加生产者相关信息

# 连接 Kafka 集群
spring.kafka.bootstrap-servers=192.168.134.47:9093

# SASL_PLAINTEXT 和 SCRAM-SHA-512 认证配置
spring.kafka.properties.security.protocol=SASL_PLAINTEXT
spring.kafka.properties.sasl.mechanism=SCRAM-SHA-512
spring.kafka.properties.sasl.jaas.config=“kafka链接的验证账户和密码”

# 生产者配置
spring.kafka.producer.key-serializer=org.apache.kafka.common.serialization.StringSerializer
spring.kafka.producer.value-serializer=org.apache.kafka.common.serialization.StringSerializer

（2）创建controller从浏览器接收数据, 并写入指定的topic

@RestController
public class ProducerController {

    @Autowired
    KafkaTemplate<String, String> kafka;

    @RequestMapping("/atguigu")
    public String data(String msg){
        // 通过kafka发送出去
        kafka.send("WJ-TEST", msg);

        return "ok";
    }
}

（3）在浏览器中给/atguigu接口发送数据

http://localhost:8080/atguigu?msg=hello

二、SpringBoot消费者

（1）修改SpringBoot核心配置文件application.propeties

# 连接 Kafka 集群
spring.kafka.bootstrap-servers=192.168.134.47:9093

# SASL_PLAINTEXT 和 SCRAM-SHA-512 认证配置
spring.kafka.properties.security.protocol=SASL_PLAINTEXT
spring.kafka.properties.sasl.mechanism=SCRAM-SHA-512
spring.kafka.properties.sasl.jaas.config=“kafka链接的验证账户和密码”

# 生产者配置
spring.kafka.producer.key-serializer=org.apache.kafka.common.serialization.StringSerializer
spring.kafka.producer.value-serializer=org.apache.kafka.common.serialization.StringSerializer

# 消费者配置
spring.kafka.consumer.key-deserializer=org.apache.kafka.common.serialization.StringDeserializer
spring.kafka.consumer.value-deserializer=org.apache.kafka.common.serialization.StringDeserializer

# 消费者组 ID
spring.kafka.consumer.group-id=atguigu

# 消费偏移量配置：从最早偏移量开始消费
spring.kafka.consumer.auto-offset-reset=earliest

# 自动提交偏移量
spring.kafka.consumer.enable-auto-commit=true
spring.kafka.consumer.auto-commit-interval=1000

（2）创建类消费Kafka中指定topic的数据

@Configuration
public class KafkaConsumer {

    @KafkaListener(topics = "WJ-TEST")
    public void consumerTopic(String msg){
        System.out.println("收到消息：" + msg);
    }
}

（3) 向WJ-TEST主题发送数据

bin/kafka-console-producer.sh --bootstrap-server kafka1:9093 --topic WJ-TEST --producer.config ./config/scram_common.properties

（4）消费到数据