Yes, here is a sample, mainly from IBM Java samples, to copy a file
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import com.ibm.jzos.FileFactory;
/**
* Sample program that uses the FileFactory class to copy a text file or
dataset.
* The input and output file names are given as arguments to main,
* and they main be either POSIX (HFS) file names or MVS dataset names.
* <p>
* If the target file is an MVS dataset, then its LRECL should be compatible
* with the source file/dataset.
* <p>
* Example file names:
* <ul>
* <li>/etc/profile</li>
* <li>//DD:INPUT</li>
* <li>//'SYS1.MACLIB(ABEND)'</li>
* <li>//MY.DATASET</li>
* </ul>
*
* @see com.ibm.jzos.FileFactory
*/
public class FileFactoryCopy {
public static void copy(String[] args) throws IOException {
if (args.length != 2) {
System.out.println("Usage: inputfileOrDataset
outputFileOrDataset");
System.exit(8);
}
BufferedReader rdr = null;
BufferedWriter wtr = null;
long count = 0;
try {
rdr = FileFactory.newBufferedReader(args[0]);
wtr = FileFactory.newBufferedWriter(args[1]);
String line;
while ((line = rdr.readLine()) != null) {
wtr.write(line);
wtr.write("\n");
count++;
}
System.out.println("Copied " + count + " lines
from: " + args[0] + " to: " + args[1] );
} finally {
if (wtr != null) wtr.close();
if (rdr != null) rdr.close();
}
}
}
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf
Of Cameron Conacher
Sent: Thursday, January 10, 2019 5:50 PM
To: [email protected]
Subject: Re: Do I need to copy a mainframe flat file to OMVS, before I access
the data from a JAVA program?
Thank you Jerry.
Do I simply add a normal DD statement identifying my file?
//MYFILE DD DSN=HLQ.MYFILE,DISP=OLD
On Thu, Jan 10, 2019 at 4:42 PM Matt Hogstrom <[email protected]> wrote:
> I haven’t verified this but I think you can reference the file in Java
> using this convention for the file name from USS and not have to run
> in an STC. I’ll try this later tonight but thought I’d offer it
> unverified if you have time. Concur with Jerry on encoding.
>
> "//‘hlq.my.mvs.filename'"
>
> If you’re interested in z/OS specific capabilities via Java on the
> platform look here:
>
>
> https://www.ibm.com/support/knowledgecenter/en/SSYKE2_7.1.0/com.ibm.ja
> va.zsecurity.api.71.doc/com.ibm.jzos/index.html
>
> Matt Hogstrom
> [email protected]
> PGP Key: 0x90ECB270
>
> "Aut Inveniam Viam Aut Faciam" translated - "I shall either find a way
> or make one."
>
> The phrase has been attributed to Hannibal <
> http://en.wikipedia.org/wiki/Hannibal>; when his generals told him it
> was impossible to cross the Alps by elephant <
> http://en.wikipedia.org/wiki/Second_Punic_War>,
>
> > On Jan 10, 2019, at 4:35 PM, Edgington, Jerry <
> [email protected]> wrote:
> >
> >
> > No you don't need to copy the file to USS, if you are running a Java
> batch job. JCL something like this, which executes the JVM procedure,
> in this case Java 1.8 64bit. The STDENV DD will need the environment
> variables, like LIBPATH, CLASSPATH, Java Options,etc.
> >
> > //JAVA EXEC PROC=JVMPRC86,
> > // REGSIZE='1024M',
> > // JAVACLS='-jar "directory path"/"name of Java program
> compiled".jar'
> > //*
> > //MAINARGS DD DUMMY
> > //STDENV DD *
> > export PATH=/bin:"${JAVA_HOME}"/bin
> > LIBPATH=/lib:/usr/lib:"${JAVA_HOME}"/bin
> > LIBPATH="$LIBPATH":"${JAVA_HOME}"/lib/s390x
> > LIBPATH="$LIBPATH":"${JAVA_HOME}"/lib/s390x/j9vm
> > export LIBPATH="$LIBPATH":
> > CLASSPATH=$CLASSPATH:${JAVA_HOME}"/lib:"${JAVA_HOME}"/lib/ext
> > export CLASSPATH="$CLASSPATH":
> > # Configure JVM options
> > IJO="-Xms16m -Xmx128m"
> >
> > As far as encoding, you will need to in account for that in your
> > Java
> program during the read.
> >
> > Hope that helps. Also, the OMVS segment is a RACF term for the
> > security
> definitions when you access USS either via 3270 or something like SSH.
> >
> > Jerry
> >
> > -----Original Message-----
> > From: IBM Mainframe Discussion List
> > [mailto:[email protected]]
> On Behalf Of Cameron Conacher
> > Sent: Thursday, January 10, 2019 4:11 PM
> > To: [email protected]
> > Subject: Do I need to copy a mainframe flat file to OMVS, before I
> access the data from a JAVA program?
> >
> > Hello Listers,
> > If I have created a flat file in some mainframe batch JOB, and I
> > want to
> pass it through a JAVA Utility, do I need to copy the file first to my
> OMVS segment, and the run my JAVA process?
> > Or can I directly access the EBCDIC encoded flat file by my JAVA process?
> >
> > Just starting down this path.
> > Not really sure where I am going with this yet, or what I will do
> > when I
> get there.
> >
> > Thank
> >
> > --------------------------------------------------------------------
> > -- For IBM-MAIN subscribe / signoff / archive access instructions,
> > send
> email to [email protected] with the message: INFO IBM-MAIN
> >
> > --------------------------------------------------------------------
> > -- For IBM-MAIN subscribe / signoff / archive access instructions,
> > send email to [email protected] with the message: INFO
> > IBM-MAIN
>
>
> ----------------------------------------------------------------------
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> email to [email protected] with the message: INFO IBM-MAIN
>
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