Question

我尝试用SpringBoot学习RabbitMQ我创建了2个类： Receiver.java（这是一个POJO）：

此课程将收到该消息。

public class Receiver {

    private CountDownLatch latch = new CountDownLatch(1);

    public void receiveMessage(String message) {
        System.out.println("Received <" + message + ">");
        latch.countDown();
    }

    public CountDownLatch getLatch() {
        return latch;
    }
}

我的seconde类RabbitMq2Application.java（它是springBootApplication）：接收我的信息。

@SpringBootApplication
public class RabbitMq2Application implements CommandLineRunner{


    final static String queueName = "spring-boot";

    @Autowired
    AnnotationConfigApplicationContext context;

    @Autowired
    RabbitTemplate rabbitTemplate;

    @Bean
    Queue queue() {
        return new Queue(queueName, false);
    }

    @Bean
    TopicExchange exchange() {
        return new TopicExchange("spring-boot-exchange");
    }

    @Bean
    Binding binding(Queue queue, TopicExchange exchange) {
        return BindingBuilder.bind(queue).to(exchange).with(queueName);
    }

    @Bean
    SimpleMessageListenerContainer container(ConnectionFactory connectionFactory, MessageListenerAdapter listenerAdapter) {
        SimpleMessageListenerContainer container = new SimpleMessageListenerContainer();
        container.setConnectionFactory(connectionFactory);
        container.setQueueNames(queueName);
        container.setMessageListener(listenerAdapter);
        return container;
    }

    @Bean
    Receiver receiver() {
        return new Receiver();
    }

    @Bean
    MessageListenerAdapter listenerAdapter(Receiver receiver) {
        return new MessageListenerAdapter(receiver, "receiveMessage");
    }

    public static void main(String[] args) {
        SpringApplication.run(RabbitMq2Application.class, args);
    }

    @Override
    public void run(String... args) throws Exception {
        System.out.println("Waiting five seconds...");
        Thread.sleep(5000);
        System.out.println("Sending message...");
        rabbitTemplate.convertAndSend(queueName, "Hello from RabbitMQ!");
        receiver().getLatch().await(10000, TimeUnit.MILLISECONDS);
        context.close();
    }
}

我收到此错误：org.springframework.beans.factory.NoSuchBeanDefinitionException

我怀疑这是因为他是@autowired。

Answer 1

请分享更多StackTrace。通常，NoSuchBeanDefinitionException周围有很多信息。

如果您导入正确的ConnectionFactory课程，请从另一方面检查。那是因为你真的需要所有的bean（RabbitAutoConfiguration）：

@Autowired
private ConnectionFactory connectionFactory;

@Bean
@ConditionalOnMissingBean(RabbitTemplate.class)
public RabbitTemplate rabbitTemplate() {
    return new RabbitTemplate(this.connectionFactory);
}

所需类型为：org.springframework.amqp.rabbit.connection.ConnectionFactory。

RabbitMQ Spring启动org.springframework.beans.factory.NoSuchBeanDefinitionException

1 个答案: