Processing Command Line Arguments in Java
Processing Command Line Arguments in Java
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Rather than parsing command line arguments yourself, Apache has a nice library to do it for you, called Apache Commons CLI. It has a few different options, for various flavors of parsing, although this example demonstrates the two most common use cases (I think) – a flag, and setting a value.
The nice thing about this is it warns you if you specify incorrect arguments, so you can avoid worrying about that ever again.
import org.apache.commons.cli.*;
public class ArtEtl {
public static void main(String[] args) throws Exception {
Options options = new Options();
options.addOption("d", false, "Delete records"); // does not have a value
options.addOption("c", true, "CSV Repository"); // has a value
CommandLineParser parser = new PosixParser();
CommandLine cmd = parser.parse( options, args);
if (cmd.hasOption("d")) {
System.out.println("Clearing index");
server.deleteByQuery("*:*");
}
}
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