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| Help with encoding exception when doing a GET |
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| AlexeiSkate |
 Posted: Tue May 14, 2002 2:59 pm Post subject: Help with encoding exception when doing a GET |
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Centurion
Joined: 10 Apr 2002
Posts: 123
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Hi,
I put a string of characters, e.g. "Hello World", onto a queue. Now I do a get and I want to display the returned string using System.out.println. I tried using MQMessage.readLine() or MQMessage.readString( MQMesage.getMessageLength ), but I keep getting the "java.io.UnsupportedEncodingException: cp437".
Do I need to set the 'characterSet' attribute of MQMessage to some valid value when doing a PUT and then do a GET with the same value for 'characterSet' ?
thanks,
Alex |
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| amurugan |
| Posted: Wed May 15, 2002 12:02 am Post subject: |
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Voyager
Joined: 10 Sep 2001
Posts: 75
Location: india
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hi ,
why dont u try with MQMessage.readUTF() or MQMessage.readString() . Let me know whether this helped you
Regards,
Murugan |
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| AlexeiSkate |
| Posted: Wed May 15, 2002 5:58 am Post subject: |
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Centurion
Joined: 10 Apr 2002
Posts: 123
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Greetings,
Thanks for the reply. I put a msg into the queue by selecting the queue from the Explorer and selecting "Put Test Message".
The readUTF() function worked for like the first 2-3 times I ran my GET program but after that, it started giving out the IOException error everytime. Strange. The readString( length ) was giving me EncodingException.
I read in the MQS for Java redbook that the default character set identifier for application message data is CharacterSet 819. So I'm assuming that the msg that I put onto the queue is encoded with the 819 characterSet (I don't quite yet understand all of this encoding stuffs). So in my code, I set the CharacterSet property to 819 before doing a GET and it seems to work:
MQMessage.characterSet = 819
localQueue.get( MQMessage, GMO )
int len = MQMessage.getTotalMessageLength()
String myMsg = MQMessage.readString( len )
System.out.println(myMsg)
(1)Is it normal that I have set the characterSet in order to be able to retrived my msg in a readable text format ?
(2) When I do a PUT, do I also have to set the characterSet for the msg also ? |
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| AlexeiSkate |
| Posted: Wed May 15, 2002 11:05 am Post subject: |
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Centurion
Joined: 10 Apr 2002
Posts: 123
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Actually I take back the part about setting the characterSet variable. I notice in my code that I have a GetMessageOptions set to MQC.MQGMO_CONVERT, and I believe that is what causing the attempt to convert the retrieved data.
I removed the CONVERT option for GMO and also removed the line that set the characterSet value. I ran my program using readString(len) and it displayed the text characters fine to standard output. |
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