Rabbitmq消息推送功能实现示例

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

@Configuration
public class Config {
    public static String directRouting = "directRouting";
    public static String directQueue = "directQueue";
    public static String directExchange = "directExchange";
    @Bean
    public Queue DirectQueue() {
        return new Queue(Config.directQueue,true);  //true 是否持久
    }
    @Bean
    DirectExchange DirectExchange() {
        return new DirectExchange(Config.directExchange);
    }
    @Bean
    Binding bindingDirect() {
//        BindingBuilder.bind(队列A).to(交换机B).with(路由) 将队列A绑定到交换机B，使用路由C传递消息
        return BindingBuilder.bind(DirectQueue()).to(DirectExchange()).with(directRouting);
    }

@Autowired
private RabbitTemplate rabbitTemplate;  //使用RabbitTemplate,这提供了接收/发送等等方法
@GetMapping("/sendDirectMsg")
public String sendMsg() {
    Map<String,Object> map=new HashMap<String,Object>();
    map.put("id",UUID.randomUUID().toString());
    map.put("data","hello,i am direct msg!");
    map.put("datetime",System.currentTimeMillis());
    //交换机 路由 消息（发送消息的时候不需要管队列，因为队列已经在DirectRabbitConfig中配置了，队列应该是消费者关心的事情）
    rabbitTemplate.convertAndSend(DirectRabbitConfig.directExchange, DirectRabbitConfig.directRouting, map);
    return "ok";
}

@Component
@RabbitListener(queues = "directQueue")//监听的队列名称 directQueue，不需要管路由和交换机，因为这些是生产者管理的事情。消费者只需要关心队列即可
public class DirectReceiver {
    @RabbitHandler
    public void handler(Map testMessage) {
        System.out.println("directReceiver消费者收到消息  : " + testMessage.toString());
    }
}