我一直试图维护一个Java CLI解析器列表。

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是的。

我想你在寻找这样的东西: http://commons.apache.org/cli

Apache Commons CLI库提供了一个用于处理命令行接口的API。

看看这些:

http://commons.apache.org/cli/ http://www.martiansoftware.com/jsap/

或者自己卷:

http://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html

例如，这是你如何使用common -cli来解析2个字符串参数:

import org.apache.commons.cli.*;

public class Main {


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

        Options options = new Options();

        Option input = new Option("i", "input", true, "input file path");
        input.setRequired(true);
        options.addOption(input);

        Option output = new Option("o", "output", true, "output file");
        output.setRequired(true);
        options.addOption(output);

        CommandLineParser parser = new DefaultParser();
        HelpFormatter formatter = new HelpFormatter();
        CommandLine cmd = null;//not a good practice, it serves it purpose 

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

            System.exit(1);
        }

        String inputFilePath = cmd.getOptionValue("input");
        String outputFilePath = cmd.getOptionValue("output");

        System.out.println(inputFilePath);
        System.out.println(outputFilePath);

    }

}

命令行用法:

$> java -jar target/my-utility.jar -i asd                                                                                       
Missing required option: o

usage: utility-name
 -i,--input <arg>    input file path
 -o,--output <arg>   output file

看看Spring Shell

Spring Shell’s features include A simple, annotation driven, programming model to contribute custom commands Use of Spring Boot auto-configuration functionality as the basis for a command plugin strategy Tab completion, colorization, and script execution Customization of command prompt, shell history file name, handling of results and errors Dynamic enablement of commands based on domain specific criteria Integration with the bean validation API Already built-in commands, such as clear screen, gorgeous help, exit ASCII art Tables, with formatting, alignment, fancy borders, etc.

如果您想要一些轻量级的(jar大小~ 20 kb)并且使用简单的东西，您可以尝试参数解析器。它可以在大多数用例中使用，支持在参数中指定数组，并且不依赖于任何其他库。它适用于Java 1.5或更高版本。下面摘录了一个如何使用它的例子:

public static void main(String[] args) {
    String usage = "--day|-d day --mon|-m month [--year|-y year][--dir|-ds directoriesToSearch]";
    ArgumentParser argParser = new ArgumentParser(usage, InputData.class);
    InputData inputData = (InputData) argParser.parse(args);
    showData(inputData);

    new StatsGenerator().generateStats(inputData);
}

更多的例子可以在这里找到

看看Commons CLI项目，里面有很多好东西。