Reading Spool files from AS400 through JAVA Applications

Question

Hi,
i am trying to read spool fiels through my java application with the help of jt400.jar files,which is developed by IBM.When i try to display the content of the spool file the result is look like this and give some ideas to come out from these
problems.
thanks in advance
selvin
--- 4- 4++++�+-+@z 4++-_��++_� 4+3@+@+@_���������@M_�����?�] 4+
s+-�+@z 4+@@@@� � 4+__++@+-@z 4+___ 4+++++++ 4+s--�+@z 4+z_a_�a___� � 4+:-
?��@z 4+B__a_�a___� 4+s�+++@z 4+|��z_�z_� � 4+:-�?���@z 4+C__� 4+G` 4+I___ �� 4+
-�?��� 4+-�?��� 4+B���?�@+�M�] 4+T@@���?� 4+j���?�@_?��� � 4+@+��� 4+@+?�� 4
B��@����� 4+T+�?����� 4+k��@_�?��� � 4+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~ � 4+__� 4+
---++ 4+B@@@@_ 4+Q@@@@@@@@@@_ 4+j@@@@@@@@@@@@@@@@@@K__ � � 4+___ 4+
---_++++--+ 4+B@@@@_ 4+Q@@@@@_�k___ 4+j@@@@@@@@@@@@_�k_�_K__ � � 4+___ 4+
---++++� 4+B@@@@� 4+Q@@@@@�k___ 4+j@@@@@@@@@@@@__k___K__ � � 4+___ 4+
----- 4+B@@@@_ 4+Q@@@@@@@@@@_ 4+j@@@@@@@@@@@@@@@@@@K__ � � 4+@@@@@@@@@@@@@@@@@@
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ � 4+'�+--@��-+@z 4+C@@@@_ 4+R@@@@@�_k___ 4+
k@@@@@@@@@@@@��k��_K__ � 4+@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@@@@@@@~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Answer 1

If you were expecting the spool file to be translated to ASCII with carriage returns, line feeds, and form feeds, here is the magical piece of code:
SpooledFile splf = new SpooledFile(sys, splfName, splfNum, jobName, jobUser, jobNum);
PrintParameterList pl = new PrintParameterList();
pl.setParameter(SpooledFile.ATTR_MFGTYPE, "*WSCST");
pl.setParameter(SpooledFile.ATTR_WORKSTATION_CUST_OBJECT, "/QSYS.LIB/QWPDEFAULT.WSCST");
InputStream in = splf.getTransformedInputStream(pl);
For reasons not immediately clear to me, the first character in the file appears to be a null byte (hex 0). I also believe that CRs and LFs only appear as needed to return to the beginning of the line (CR) and the feed one line (LF). It is permissible for example to have <data><CR><LF><LF><LF> (i.e. feed three lines). I also assume that <data><CR><data><CR><LF> would result in overprinting (missing line feed). I have even seen <data><CR><CR>, and I assume the second CR should be ignored.
I have not exhaustively tested these scenarios, but from some of the problems we've had, the above description seems like a reasonable way to think about the data stream