接收消息时出现RabbitMQ，但我没有找到类的方法[B异常

分类：编程问答

如何解决接收消息时出现RabbitMQ，但我没有找到类的方法[B异常

->这是我第一次尝试JMS，我已经在Consumer类上创建了使用RabbitMQ GUI消息的消息。 ->但是当我发布任何来自RabbitMQ GUI的消息时，找不到给定的错误类。并不断在控制台上打印错误。

@Component
@RabbitListener(queues =  {"#{addNeRangeQueue.name}"})
public class consumerController {

    @RabbitHandler
    public void receive(String message) {
        System.out.println("rabbit mq listener receive : "+message);
    }
}

   
   
@Configuration
public class RabbitMQConsumerConfig {
 
    //properties value configuration i have removed here.
    @Bean
    public Queue addNeRangeQueue() {
        return new Queue(queueName,false);
    }
    
    @Bean
    public TopicExchange getTopicEchangeName() {
        return new TopicExchange(exchange);
    }

    @Bean
    public Binding bindaddNeRange(TopicExchange getTopicEchangeName,Queue addNeRangeQueue) {
        return BindingBuilder.bind(addNeRangeQueue).to(getTopicEchangeName).with(routingkey);
    }
}

例外：

    2020-09-08 00:19:10.378  WARN 9456 --- [ntContainer#0-1] s.a.r.l.ConditionalRejectingErrorHandler : Execution of Rabbit message listener failed.
    
    org.springframework.amqp.rabbit.support.ListenerExecutionFailedException: Listener threw exception
        at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.wrapToListenerExecutionFailedExceptionIfNeeded(AbstractMessageListenerContainer.java:1705) ~[spring-rabbit-2.2.10.RELEASE.jar:2.2.10.RELEASE]
        at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:1595) ~[spring-rabbit-2.2.10.RELEASE.jar:2.2.10.RELEASE]
        at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.actualInvokeListener(AbstractMessageListenerContainer.java:1510) ~[spring-rabbit-2.2.10.RELEASE.jar:2.2.10.RELEASE]
        at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:1498) ~[spring-rabbit-2.2.10.RELEASE.jar:2.2.10.RELEASE]
        at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:1489) ~[spring-rabbit-2.2.10.RELEASE.jar:2.2.10.RELEASE]
        at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:1433) ~[spring-rabbit-2.2.10.RELEASE.jar:2.2.10.RELEASE]
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:970) [spring-rabbit-2.2.10.RELEASE.jar:2.2.10.RELEASE]
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:916) [spring-rabbit-2.2.10.RELEASE.jar:2.2.10.RELEASE]
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$1600(SimpleMessageListenerContainer.java:83) [spring-rabbit-2.2.10.RELEASE.jar:2.2.10.RELEASE]
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.mainLoop(SimpleMessageListenerContainer.java:1291) [spring-rabbit-2.2.10.RELEASE.jar:2.2.10.RELEASE]
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1197) [spring-rabbit-2.2.10.RELEASE.jar:2.2.10.RELEASE]
        at java.lang.Thread.run(Unknown Source) [na:1.8.0_211]
    Caused by: org.springframework.amqp.AmqpException: No method found for class [B
        at org.springframework.amqp.rabbit.listener.adapter.DelegatingInvocableHandler.getHandlerForPayload(DelegatingInvocableHandler.java:151) ~[spring-rabbit-2.2.10.RELEASE.jar:2.2.10.RELEASE]
        at org.springframework.amqp.rabbit.listener.adapter.DelegatingInvocableHandler.getMethodFor(DelegatingInvocableHandler.java:270) ~[spring-rabbit-2.2.10.RELEASE.jar:2.2.10.RELEASE]
        at org.springframework.amqp.rabbit.listener.adapter.HandlerAdapter.getMethodFor(HandlerAdapter.java:84) ~[spring-rabbit-2.2.10.RELEASE.jar:2.2.10.RELEASE]
        at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.invokeHandlerAndProcessResult(MessagingMessageListenerAdapter.java:146) ~[spring-rabbit-2.2.10.RELEASE.jar:2.2.10.RELEASE]
        at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.onMessage(MessagingMessageListenerAdapter.java:133) ~[spring-rabbit-2.2.10.RELEASE.jar:2.2.10.RELEASE]
        at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:1591) ~[spring-rabbit-2.2.10.RELEASE.jar:2.2.10.RELEASE]
        ... 10 common frames omitted

解决方法

您需要显示容器出厂配置。如果您使用的是JSON消息转换器，则如果content_type属性错误，它将返回byte[]。

从用户界面发送时，设置content_type=application/json。

如果使用默认转换器，请设置content_type=text/plain以将byte[]转换为String。

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