我想向您展示我的实现:ReadyCLI

优点:

for lazy programmers: a very small number of classes to learn, just see the two small examples on the README in the repository and you are already at 90% of learning; just start coding your CLI/Parser without any other knowledge; ReadyCLI allows coding CLIs in the most natural way; it is designed with Developer Experience in mind; it largely uses the Builder design pattern and functional interfaces for Lambda Expressions, to allow a very quick coding; it supports Options, Flags and Sub-Commands; it allows to parse arguments from command-line and to build more complex and interactive CLIs; a CLI can be started on Standard I/O just as easily as on any other I/O interface, such as sockets; it gives great support for documentation of commands.

我开发这个项目是因为我需要新的功能(选项，标志，子命令)，并且可以在我的项目中以最简单的方式使用。

Argparse4j是我发现的最好的。它模仿Python的argparse库，非常方便和强大。

最近有人向我推荐了基于注释的args4j。我真的很喜欢!

我使用过JOpt，发现它非常方便:http://jopt-simple.sourceforge.net/

首页还提供了一个大约8个备选库的列表，检查它们并选择最适合您的需求。

如果您已经在使用Spring Boot，那么参数解析将是现成的。

如果你想在启动后运行一些东西，实现ApplicationRunner接口:

@SpringBootApplication
public class Application implements ApplicationRunner {

  public static void main(String[] args) {
    SpringApplication.run(Application.class, args);
  }

  @Override
  public void run(ApplicationArguments args) {
    args.containsOption("my-flag-option"); // test if --my-flag-option was set
    args.getOptionValues("my-option");     // returns values of --my-option=value1 --my-option=value2 
    args.getOptionNames();                 // returns a list of all available options
    // do something with your args
  }
}

您的run方法将在上下文成功启动后被调用。

如果你需要在启动你的应用程序上下文之前访问参数，你可以简单地手动解析应用程序参数:

@SpringBootApplication
public class Application implements ApplicationRunner {

  public static void main(String[] args) {
    ApplicationArguments arguments = new DefaultApplicationArguments(args);
    // do whatever you like with your arguments
    // see above ...
    SpringApplication.run(Application.class, args);
  }

}

最后，如果您需要访问bean中的参数，只需注入ApplicationArguments:

@Component
public class MyBean {

   @Autowired
   private ApplicationArguments arguments;

   // ...
}

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。