Spring Boot Sample 029之spring-boot-mq-kafka

一、环境

• Idea 2020.1
• JDK 1.8
• maven

二、目的

spring boot 通过整合kafka

gitHub地址： https://github.com/ouyushan/ouyushan-spring-boot-samples

三、步骤

3.1、点击File -> New Project -> Spring Initializer，点击next

3.2、在对应地方修改自己的项目信息

3.3、选择Web依赖，选中Spring Web、Spring Boot DevTools。可以选择Spring Boot版本，本次默认为2.3.0，点击Next

3.4、项目结构

四、添加文件

pom.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>org.ouyushan</groupId>
    <artifactId>spring-boot-mq-kafka</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>spring-boot-mq-kafka</name>
    <description>Kafka project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <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.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

application.properties文件

spring.kafka.bootstrap-servers=localhost:9092
spring.kafka.consumer.group-id=testGroup
spring.kafka.consumer.auto-offset-reset=earliest
spring.kafka.consumer.value-deserializer=org.springframework.kafka.support.serializer.JsonDeserializer
spring.kafka.consumer.properties.spring.json.trusted.packages=sample.kafka
spring.kafka.producer.value-serializer=org.springframework.kafka.support.serializer.JsonSerializer

SampleMessage.java

package org.ouyushan.springboot.mq.kafka.entity;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;

/**
 * @Description:
 * @Author: ouyushan
 * @Email: ouyushan@hotmail.com
 * @Date: 2020/6/9 14:02
 */
public class SampleMessage {

    private final Integer id;

    private final String message;

    @JsonCreator
    public SampleMessage(@JsonProperty("id") Integer id, @JsonProperty("message") String message) {
        this.id = id;
        this.message = message;
    }

    public Integer getId() {
        return this.id;
    }

    public String getMessage() {
        return this.message;
    }

    @Override
    public String toString() {
        return "SampleMessage{id=" + this.id + ", message='" + this.message + "'}";
    }

}

KafkaConsumerListener.java

package org.ouyushan.springboot.mq.kafka.listener;

import org.ouyushan.springboot.mq.kafka.entity.SampleMessage;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.stereotype.Component;

/**
 * @Description:
 * @Author: ouyushan
 * @Email: ouyushan@hotmail.com
 * @Date: 2020/6/9 14:01
 */
@Component
public class KafkaConsumerListener {

    @KafkaListener(topics = "testTopic")
    public void processMessage(SampleMessage message) {
        System.out.println("Received sample message [" + message + "]");
    }
}

KafkaProducerController.java

package org.ouyushan.springboot.mq.kafka.controller;

import org.ouyushan.springboot.mq.kafka.entity.SampleMessage;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @Description:
 * @Author: ouyushan
 * @Email: ouyushan@hotmail.com
 * @Date: 2020/6/9 14:07
 */
@RestController
public class KafkaProducerController {


    private KafkaTemplate<Object, SampleMessage> kafkaTemplate;

    public KafkaProducerController(KafkaTemplate<Object, SampleMessage> kafkaTemplate) {
        this.kafkaTemplate = kafkaTemplate;
    }

    @RequestMapping("/sendMsg")
    public void sendMsg(SampleMessage message) {
        this.kafkaTemplate.send("testTopic", message);
        System.out.println("Sent sample message [" + message + "]");
    }

}

五、测试

SpringBootMqRocketmqApplicationTests.java

package org.ouyushan.springboot.mq.kafka;

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureWebMvc;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.http.MediaType;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;

import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

@SpringBootTest
@AutoConfigureWebMvc
class SpringBootMqKafkaApplicationTests {

    @Test
    public void testMQProducer(@Autowired MockMvc mockMvc) throws Exception {
        mockMvc.perform(MockMvcRequestBuilders.get("/sendMsg?message=")
                .accept(MediaType.APPLICATION_JSON))
                .andExpect(status().isOk())
                .andDo(print());
    }

}