GNU Parser（ GNU Parser）

GNU解析器用于解析传递的gnu参数。 它现已弃用，并由DefaultParser取代。

例子 (Example)

CLITester.java

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
public class CLITester {
   public static void main(String[] args) throws ParseException {
      //Create GNU like options
      Options gnuOptions = new Options();
      gnuOptions.addOption("p", "print", false, "Print")
         .addOption("g", "gui", false, "GUI")
         .addOption("n", true, "Scale");
      CommandLineParser gnuParser = new GnuParser();
      CommandLine cmd = gnuParser.parse(gnuOptions, args);
      if( cmd.hasOption("p") ) {
         System.out.println("p option was used.");
      }
      if( cmd.hasOption("g") ) {
         System.out.println("g option was used.");
      }
      if( cmd.hasOption("n") ) {
         System.out.println("Value passed: " + cmd.getOptionValue("n"));
      }
   } 
}

输出 (Output)

在传递-p -g -n 10作为选项时运行该文件并查看结果。

java CLITester -p -g -n 10
p option was used.
g option was used.
Value passed: 10