八、SpringBoot集成Kafka

目录

一、添加依赖

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

二、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

spring.application.name=atguigu_springboot_kafka
#指定kafka集群地址
spring.kafka.bootstrap-servers=192.168.239.11:9092,192.168.239.12:9092

#key value序列化
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("first", msg);

        return "ok";
    }
}

三、SpringBoot 消费者

1、修改 SpringBoot 核心配置文件 application.propeti

#指定kafka集群地址
spring.kafka.bootstrap-servers=192.168.239.11:9092,192.168.239.12:9092

#key value序列化
spring.kafka.producer.key-serializer=org.apache.kafka.common.serialization.StringSerializer
spring.kafka.producer.value-serializer=org.apache.kafka.common.serialization.StringSerializer

# key value 反序列化器
spring.kafka.consumer.key-deserializer=org.apache.kafka.common.serialization.StringDeserializer
spring.kafka.consumer.value-deserializer=org.apache.kafka.common.serialization.StringDeserializer

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

2、创建类消费 Kafka 中指定 topic 的数据

@Configuration
public class KafkaConsumer {

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