Kafka入门到精通(四)-SpringBoot+Kafka

news2024/11/26 9:31:19

一丶IDEA创建一个空项目

二丶添加相关依赖

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka</artifactId>
            <version>2.9.13</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.28</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>com.alibaba.fastjson2</groupId>
            <artifactId>fastjson2</artifactId>
            <version>2.0.12</version>
        </dependency>
    </dependencies>

三丶编写简单生产者

    /**
     * 简单的生产者消费者
     * @param message
     */
    @GetMapping("/kafka/normal/message")
    public void sendNormalMessage(@RequestParam("message") String message) {
        log.info("======================="+message);
        kafkaTemplate.send("sb_topic", 0, System.currentTimeMillis(), "key1", message);
    }

四丶编写简单消费者

@Component
public class KafkaConsumer {
 
    //监听消费
    //@KafkaListener(topics = {"sb_topic"})
    @KafkaListener(topics = {"sb_topic","callbackOne_topic"}, groupId = "testGroup")
    public void onNormalMessage(ConsumerRecords<String,Object> records) {
        for (ConsumerRecord<String, Object> record : records) {
            System.out.printf("offset = %d, key = %s, value = %s\n", record.offset(), record.key(), record.value());
        }
    }
 
}

这里有个坑，ConsumerRecord如果不加s会报错，我之间在借鉴他人代码的时候出现的，不知道是不是版本问题。我也刚用kafka，正在研究哈哈，见谅见谅；

postman请求：