看看Commons CLI项目，里面有很多好东西。

最近有人向我推荐了基于注释的args4j。我真的很喜欢!

也许这些

JArgs命令行选项解析 这个小项目为Java程序员提供了一个方便、紧凑、预打包和全面文档化的命令行选项解析器套件。最初，提供了与gnu风格的“getopt”兼容的解析。 ritopt, Java的终极选项解析器——尽管已经预先提出了几个命令行选项标准，ritopt仍然遵循opt包中规定的约定。

如果你熟悉gnu getopt，有一个Java端口:http://www.urbanophile.com/arenn/hacking/download.htm。

似乎有一些类是这样做的:

http://docs.sun.com/source/816-5618-10/netscape/ldap/util/GetOpt.html http://xml.apache.org/xalan-j/apidocs/org/apache/xalan/xsltc/cmdline/getopt/GetOpt.html

For Spring users, we should mention also https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/core/env/SimpleCommandLinePropertySource.html and his twin brother https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/core/env/JOptCommandLinePropertySource.html (JOpt implementation of the same functionality). The advantage in Spring is that you can directly bind the command line arguments to attributes, there is an example here https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/core/env/CommandLinePropertySource.html

这是谷歌的命令行解析库，作为Bazel项目的一部分是开源的。我个人认为它是最好的，比Apache CLI简单得多。

https://github.com/pcj/google-options

安装

Bazel

maven_jar(
    name = "com_github_pcj_google_options",
    artifact = "com.github.pcj:google-options:jar:1.0.0",
    sha1 = "85d54fe6771e5ff0d54827b0a3315c3e12fdd0c7",
)

Gradle

dependencies {
  compile 'com.github.pcj:google-options:1.0.0'
}

Maven

<dependency>
  <groupId>com.github.pcj</groupId>
  <artifactId>google-options</artifactId>
  <version>1.0.0</version>
</dependency>

使用

创建一个扩展OptionsBase并定义@Option(s)的类。

package example;

import com.google.devtools.common.options.Option;
import com.google.devtools.common.options.OptionsBase;

import java.util.List;

/**
 * Command-line options definition for example server.
 */
public class ServerOptions extends OptionsBase {

  @Option(
      name = "help",
      abbrev = 'h',
      help = "Prints usage info.",
      defaultValue = "true"
    )
  public boolean help;

  @Option(
      name = "host",
      abbrev = 'o',
      help = "The server host.",
      category = "startup",
      defaultValue = ""
  )
  public String host;

  @Option(
    name = "port",
    abbrev = 'p',
    help = "The server port.",
    category = "startup",
    defaultValue = "8080"
    )
    public int port;

  @Option(
    name = "dir",
    abbrev = 'd',
    help = "Name of directory to serve static files.",
    category = "startup",
    allowMultiple = true,
    defaultValue = ""
    )
    public List<String> dirs;

}

解析参数并使用它们。

package example;

import com.google.devtools.common.options.OptionsParser;
import java.util.Collections;

public class Server {

  public static void main(String[] args) {
    OptionsParser parser = OptionsParser.newOptionsParser(ServerOptions.class);
    parser.parseAndExitUponError(args);
    ServerOptions options = parser.getOptions(ServerOptions.class);
    if (options.host.isEmpty() || options.port < 0 || options.dirs.isEmpty()) {
      printUsage(parser);
      return;
    }

    System.out.format("Starting server at %s:%d...\n", options.host, options.port);
    for (String dirname : options.dirs) {
      System.out.format("\\--> Serving static files at <%s>\n", dirname);
    }
  }

  private static void printUsage(OptionsParser parser) {
    System.out.println("Usage: java -jar server.jar OPTIONS");
    System.out.println(parser.describeOptions(Collections.<String, String>emptyMap(),
                                              OptionsParser.HelpVerbosity.LONG));
  }

}

https://github.com/pcj/google-options