Java Command line argument parsing issue using Apache commons library

Question

I am using Apache commons basic/gnu parser to parse command line options as shown below.

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.DefaultParser;
import org.apache.commons.cli.GnuParser;


    CommandLineParser parser = new GnuParser();
    CommandLine cmd = parser.parse(options, args);
    System.out.println(cmd.getOptionValue("iplist"));

I am invoking program using below mention list of parameters.

 java -jar myjar.jar --iplist 160.1.1.1,3009 160.1.1.1,3003 160.1.1.1,3004

Out put i am getting is just first IP address, how can i get all three IP addresses with port which are passed as an argument to --iplist variable?

Here are the options i am using.

    options.addOption("h", "help", false, "show help.");
    options.addOption("iplst","iplist", true, "Provide name of server where program can listen IP,PORT");

         CommandLineParser parser = new GnuParser();
         CommandLine cmd = null;
      try {
       cmd = parser.parse(options, args);

       if (cmd.hasOption("h"))
        help();

       if (cmd.hasOption("iplist")) {
        System.out.println( "Using cli argument --server=" + cmd.getOptionValue("iplistr"));
//Code here
       }

have you tried java -jar myjar.jar --iplist "160.1.1.1,3009 160.1.1.1,3003 160.1.1.1,3004" ? — ymonad
– ymonad, Commented Apr 26, 2016 at 2:05
@ymonad double quote solution is working but i can't force user to pass arguments in quotes. — Ammad
– Ammad, Commented Apr 26, 2016 at 17:36

alpert · Accepted Answer · 2016-04-27 06:58:06Z

1

You can use OptionBuilder like:

Option iplist = OptionBuilder
                .withArgs() // option has unlimited argument
                .withDescription("Provide name of server where program can listen IP,PORT")
                .withLongOption("iplist") // means start with -- 
                .create()

Also look at:

https://commons.apache.org/proper/commons-cli/usage.html

http://apache-commons.680414.n4.nabble.com/cli-Example-using-of-option-with-two-mandatory-arguments-td3321524.html

edited Apr 27, 2016 at 6:58

answered Apr 26, 2016 at 19:03

alpert

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3 Comments

Ammad Over a year ago

withArgs method is deprecated Option server = Option.builder("r").argName("ipl").longOpt("iplist") .hasArg().desc("Name of server where decoder or collector can listen IP,PORT") .required().build();

Ammad Over a year ago

Or it is possible if i give values of iplist two times and get value out of it . java -jar myjar.jar --iplist 160.1.1.1,3009 --iplist 160.1.1.1,3010 ?

alpert Over a year ago

I am not sure but I guess it is a valid usage so you can try. But be careful about hasArg() and hasArgs(). Use second for multiple arguments.

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