SpringBoot整合RabbitMQ出现org.springframework.amqp.AmqpException: No method found for class

@Component
@RabbitListener(queues="my_fanout")
public class Consumer {

    @RabbitHandler 
    public void process(String msg){
        System.out.println(msg);
    }
}
但是运行接收消息时，后台一直循环报错

Caused by: org.springframework.amqp.AmqpException: No method found for class [B
    at org.springframework.amqp.rabbit.listener.adapter.DelegatingInvocableHandler.getHandlerForPayload(DelegatingInvocableHandler.java:127)
    at org.springframework.amqp.rabbit.listener.adapter.DelegatingInvocableHandler.getMethodNameFor(DelegatingInvocableHandler.java:224)
    at org.springframework.amqp.rabbit.listener.adapter.HandlerAdapter.getMethodAsString(HandlerAdapter.java:61)
    at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:140)
    at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.onMessage(MessagingMessageListenerAdapter.java:106)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:822)
    ... 10 common frames omitted

解决方法：
@RabbitListener(queues=”my_fanout”)不需要放在类上。直接注释在方法上就好

@Component
public class Consumer {
    @RabbitListener(queues="my_fanout")
    public void process(Message message){
        System.out.println(new String(message.getBody()));
    }
}