从bytes []转换为EBCDIC字符串

Question

I am receiving bytes[] from mainframe MQ. This bytes[] I am trying to convert to EBCDIC string. I am using the following and the sytem just hangs. What could be the issue?

new String(mqmdAccountingToken,"Cp1047");

mqmdAccountingToken is the byte array received from MQ. I feel that the Charset that I have provided is not correct. Is there a way to identify the correct charset to use and then convert?

Answer 1

The MQMD AccountingToken field is made up of both binary values and character values set by the queue manager (default behavior), so you need to treat it as a binary field (ie byte[] field) and not a character field.

If you really want to convert it to some character field then convert it to Hex display characters.

Answer 2

Evidently one of the main criticisms of EBCDIC early on was its large number of variants. You will need to determine, almost certainly outside your program, which variant you have, and use the corresponding character set. The fact that it is from a "mainframe" and MQ does not identify the character set. You can see the number of possible sets at this IBM site .

Answer 3

Here is how you should be dealing with MQMD AccountingToken field - you convert it from binary data to hex display characters.

StringBuffer sb = new StringBuffer();
String hex;
for (i=0; i < msg.accountingToken.length; i++)
{
   hex = Integer.toHexString((new Byte(msg.accountingToken[i])).intValue());

   if (hex.length() == 2)
      sb.append(hex);
   else if (hex.length() == 1)
      sb.append("0" + hex);
   else if (hex.length() > 2)
   {
      sb.append(hex.substring(hex.length()-2,hex.length()-1));
      sb.append(hex.substring(hex.length()-1,hex.length()));
   }
}
System.out.println(" AccountingToken: X'" + sb.toString().toUpperCase() + "'");