是否存在将Java命令行选项解析为关联数组的库? [英] Is there a library to parse java command line options into an associative array?

问题描述

我需要一个可以采用java -jar --aaa=a --bbb=b ---ccc=c形式的命令行选项并返回其值可以通过argsArray['aaa'], argsArray['bbb']等访问的数组的库.

I need a library which can take command line options of the form java -jar --aaa=a --bbb=b ---ccc=c and return an array whose values can be accessed as argsArray['aaa'], argsArray['bbb'] etc.

是否有一些带有示例的图书馆来做到这一点?

Is there some library with examples to do this?

推荐答案

选项可以带有或不带有参数，可以是可选的或必需的，并且您可以为每个设置设置说明以获取使用帮助.一个简单的用法示例:

Options can have arguments or not, can be optional or required, and you can set up descriptions for each for usage help. A brief example usage:

public static void main(String[] args) {

   Options options = new Options();

   try {
      options.addOption(OptionBuilder.withArgName("help").hasArgs(0).withDescription("Prints this help message.").isRequired(false).create("h"));
      options.addOption(OptionBuilder.withArgName("debug logging").hasArgs(0).withDescription("Enable debug logging").isRequired(false).create("1"));

      CommandLineParser parser = new PosixParser();
      CommandLine cmd = parser.parse(options, args);

      if (cmd.hasOption("h")) {
         new HelpFormatter().printHelp(400, "load_page_spool.sh", "OPTIONS", options, "Loads crawl data from pages pool, updating FRONTIER, HISTORY and PageTable", true);
         return;
      }

      ....

   } catch (MissingOptionException e) {
       HelpFormatter formatter = new HelpFormatter();
       formatter.printHelp("LoadPageSpool", options);
   }


}

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