通过CLI在Java中传递参数 [英] Passing argument in java through CLI

问题描述

通过 CLI 在 Java 中传递参数时，我们通常像

While passing arguments in Java through CLI we generally pass like

java -cp jar classname "args[0]" "args[1]"

我想传递类似-host主机名--user用户名--password密码等.

请帮助我实现这一目标.

Please help me in achieving this.

预先感谢！

推荐答案

您可以按以下方式使用 commons-cli 库:

You can use commons-cli library as follows:

import org.apache.commons.cli.*;

public class Main {


    public static void main(String[] args) throws Exception {

        Options options = new Options();

        Option host = new Option("h", "host", true, "host address");
        host .setRequired(true);
        options.addOption(host);

        Option user = new Option("u", "user", true, "user login");
        user.setRequired(true);
        options.addOption(user);

        Option password = new Option("p", "password", true, "user's password");
        password.setRequired(true);
        options.addOption(password);

        CommandLineParser parser = new DefaultParser();
        HelpFormatter formatter = new HelpFormatter();
        CommandLine cmd;

        try {
            cmd = parser.parse(options, args);
        } catch (ParseException e) {
            System.out.println(e.getMessage());
            formatter.printHelp("my-program", options);

            System.exit(1);
            return;
        }

        String inputHost = cmd.getOptionValue("host");
        String inputUser = cmd.getOptionValue("user");
        String inputPassword = cmd.getOptionValue("password");


    }

}

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