Search code examples
javafilebatch-filecommandpiping

Does running a batch file from java program destroy piping?

I'm trying to run a batch file from within my Java program, but I'm getting some strange behavior.

Process p = Runtime.getRuntime().exec("cmd /c start temp.bat");

This usually runs okay, but I've found that piping commands in the batch file won't work. Any suggestions?

Solution

  • I advise you to use CommonsExec which will make your life a lot easier. You could use some code like this (untested):

    CommandLine cmdLine = new CommandLine("ping");
cmdLine.addArgument( host );

ByteArrayOutputStream stdout = new ByteArrayOutputStream();
PumpStreamHandler     psh    = new PumpStreamHandler( stdout );

DefaultExecutor executor = new DefaultExecutor(); 
executor.setStreamHandler( psh );

try {
  executor.execute( cmdLine );
} catch ( Exception e ) {
}

System.out.println( stdout.toString() );