[I] 当 `onMessage` 要转换的消息类型为 `byte[]` 时，报错：ClassCastException: java.lang.String cannot be cast to [B [rocketmq-spring]

[via GitHub]

BrightX opened a new issue, #695:
URL: https://github.com/apache/rocketmq-spring/issues/695

   
https://github.com/apache/rocketmq-spring/blob/b3963f76589a5348370ea990c15e3878806e2710/rocketmq-spring-boot/src/main/java/org/apache/rocketmq/spring/support/DefaultRocketMQListenerContainer.java#L543-L551
   
   
![image](https://github.com/user-attachments/assets/ee4b23df-39d5-4c79-a970-29e2a69bf910)
   
   
   我注意到这里当要转换的类型为 `byte[]` 时，会调用`spring-messaging` 的 
`ByteArrayMessageConverter` 的 `convertFromInternal`，而这个方法会原样返回 `payload`。而截图的 
[`L551` 
行](https://github.com/apache/rocketmq-spring/blob/b3963f76589a5348370ea990c15e3878806e2710/rocketmq-spring-boot/src/main/java/org/apache/rocketmq/spring/support/DefaultRocketMQListenerContainer.java#L543-L551)，将
 `payload` 设置成了 `str`，导致 `String` 到 `byte[]` 的类型转换异常 `ClassCastException: 
java.lang.String cannot be cast to [B` 。
   ```java
   
org.springframework.messaging.converter.ByteArrayMessageConverter#convertFromInternal
   
       return message.getPayload();
   ```


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