java 解析命令行参数

下载地址： https://jcenter.bintray.com/org/apache/commons/com.springsource.org.apache.commons.cli/1.2.0/

package com.test;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.BasicParser;
import org.apache.commons.cli.CommandLine;

public class Main {

    public static void main(String[] args) throws Exception {
        // Create a Parser
        CommandLineParser parser = new BasicParser( );
        Options options = new Options( );
        options.addOption("h", "help", false, "Print this usage information");
        options.addOption("v", "verbose", false, "Print out VERBOSE information" );
        options.addOption("f", "file", true, "File to save program output to");
        // Parse the program arguments
        CommandLine commandLine = parser.parse( options, args );
        // Set the appropriate variables based on supplied options
        boolean verbose = false;
        String file = "";

        if( commandLine.hasOption('h') ) {
            System.out.println( "Help Message");
            System.exit(0);
        }
        if( commandLine.hasOption('v') ) {
            verbose = true;
        }
        if( commandLine.hasOption('f') ) {
            file = commandLine.getOptionValue('f');
        }

    }

}