aaron-ai commented on issue #262:
URL: 
https://github.com/apache/rocketmq-clients/issues/262#issuecomment-1281913560

   The underlying byte array of `bytebuffer` is readonly, which means you could 
not get it directly, so copy it from `bytebuffer` rather than get it directly 
if you need `byte[]`. 
   
   ```java
   byte[] bytes = new byte[body.remaining()];
   body.get(bytes);
   ```
   
   or you could easily get `String` type according to your type.
   
   ```java
   // Replace by your charset
   final String body = 
StandardCharsets.UTF_8.decode(messageView.getBody()).toString();
   ```


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