SpringBoot基于Redis的发布订阅

1.导入Redis依赖

<!-- SpringBoot整合Redis -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

2.修改Redis配置

# 配置redis
spring.redis.host=localhost
spring.redis.port=6379

3.自定义RedisTamplate

/*
* 自定义RedisTamplate
* */

@Configuration
public class RedisConfig {
          
   

    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) throws UnknownHostException {
          
   
        // 将template 泛型设置为 <String, Object>
        RedisTemplate<String, Object> template = new RedisTemplate();
        // 连接工厂，不必修改
        template.setConnectionFactory(redisConnectionFactory);
        /*
         * 序列化设置
         */
        // key、hash的key 采用 String序列化方式
        template.setKeySerializer(RedisSerializer.string());
        template.setHashKeySerializer(RedisSerializer.string());
        // value、hash的value 采用 Jackson 序列化方式
        template.setValueSerializer(RedisSerializer.json());
        template.setHashValueSerializer(RedisSerializer.json());
        template.afterPropertiesSet();
        
        return template;
    }
}

4.发布者

Publisher接口

/*
* 发布者
* */
public interface Publisher {
          
   
    void sendMsg(String topic, String msg);
}

Mypublisher类

@Service
public class MyPublisher implements Publisher {
          
   

    @Autowired
    public RedisTemplate<String, Object> redisTemplate;

    @Override
    public void sendMsg(String topic, String msg) {
          
   
        redisTemplate.convertAndSend(topic, msg);
    }
}

5.订阅者

1）配置RedisMessageListenerContainer容器

/*
    * 配置RedisMessageListenerContainer容器
    * */
    @Bean
    RedisMessageListenerContainer redisContainer(RedisConnectionFactory factory) {
          
   
        RedisMessageListenerContainer container = new RedisMessageListenerContainer();
        container.setConnectionFactory(factory);
        return container;
    }

2）定义消息监听器，需要实现MessageListener接口

@Component
public class MsgListener implements MessageListener {
          
   

    @Override
    public void onMessage(Message message, byte[] pattern) {
          
   
        System.out.println("Message received: " + message.toString());
    }
}

3）SubScriber订阅者类

@Service
public class SubScriber {

    @Autowired
    private RedisMessageListenerContainer container;

    public void subScribe(String topic){
        //订阅频道
        container.addMessageListener(new MsgListener(), new ChannelTopic(topic));
    }
}

6.测试Controller

@RestController
public class MsgController {
          
   
        @Autowired
        private MyPublisher publisher;

        @Autowired
        private SubScriber subScriber;

        @RequestMapping("/sendMsg/{msg}")
        public String sendMsg(@PathVariable("msg") String msg){
          
   
            publisher.sendMsg("mjj", msg);
            return "发布成功！";
        }

        @RequestMapping("/subChannel/{topic}")
        public String subChannel(@PathVariable("topic") String topic){
          
   
            subScriber.subScribe(topic);
            return "订阅成功！";
        }
}

localhost:8080/subChannel/mjj
http://localhost:8080/sendMsg/123456

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