Java命令行參數解析工具包：CmdOption

CmdOption 是一個用于Java5應用程序的注解驅動的簡單命令行參數解析工具包，你所需要做的就是簡單配置對象，每個字段和方法通過注解來定義。

示例代碼：

package org.example;

import java.util.*;
import de.tototec.cmdoption.*;

public class Main {

  public static class Config {
    @CmdOption(names = {"--help", "-h"}, description = "Show this help.", isHelp = true)
    public boolean help;

    @CmdOption(names = {"--verbose", "-v"}, description = "Be more verbose.")
    private boolean verbose;

    @CmdOption(names = {"--options", "-o"}, args = {"name", "value"}, maxCount = -1, description = "Additional options when processing names.")
    private final Map<String, String> options = new LinkedHashMap<String, String>();

    @CmdOption(args = {"file"}, description = "Names to process.", minCount = 1, maxCount = -1)
    private final List<String> names = new LinkedList<String>();
  }

  public static void main(String[] args) {
    Config config = new Config();
    CmdlineParser cp = new CmdlineParser(config);
    cp.setResourceBundle(Main.class.getPackage().getName() + ".Messages", Main.class.getClassLoader());
    cp.setProgramName("myprogram");
    cp.setAboutLine("Example names processor v1.0");

    try {
      cp.parse(args);
    } catch (CmdlineParserException e) {
      System.err.println("Error: " + e.getLocalizedMessage() + "\nRun myprogram --help for help.");
      System.exit(1);
    }

    if (config.help) {
      cp.usage();
      System.exit(0);
    }

    // ...
  }
}

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