Question

我有一条从JMS的电文中获取信息的法典,但我不理解,如果信息是灵丹妙的,如何将其转化为<条码>。

connectQueueBrowser();
Enumeration<Message> messageEnumeration =  queueBrowser.getEnumeration();
ArrayList<Message> messages = new ArrayList<>();
while (messageEnumeration.hasMoreElements()){
   messages.add(messageEnumeration.nextElement());
}
System.out.println(messages.get(0).getBody(String.class));

这是我发现的错误:

javax.jms.MessageFormatException: Body not assignable to class java.lang.String

但是,当我显示身体信息时,我就错了。

Answer 1

如果您寄送了“JMS BytesMessage,则您可使用 only usegetBody with byte [].},例如:

System.out.println(messages.get(0).getBody(byte[].class));

If you ve serialized a Java String into the BytesMessage using something like this:

bytesMessage.writeBytes(myString.getBytes(StandardCharsets.UTF_8));

Then you ll be able to deserialize that String from the BytesMessage using something like this:

byte[] myBytes = new byte[(int)bytesMessage.getBodyLength()];
bytesMessage.readBytes(myBytes);      
String myString = new String(myBytes, StandardCharsets.UTF_8);

友情链接