日期:2014-05-16 浏览次数:20888 次
在学习Mahout中Kmeans源码中,了解了大概的结构,了解到对于输入接口,Mahout应该是在apache的Options(org.apache.commons.cli)基础上,实现了自己的Options(org.apache.commons.cli2)。查阅相关资料,大致了解了apache的Options,写了个简单的例子。
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package Etl; import org.apache.commons.cli.BasicParser; import org.apache.commons.cli.CommandLine; import org.apache.commons.cli.Option; import org.apache.commons.cli.OptionBuilder; import org.apache.commons.cli.Options; import org.apache.commons.cli.ParseException; public final class DefaultOptionCreator { public static final String INPUT_OPTION = "input"; public static final String OUTPUT_OPTION = "output"; private DefaultOptionCreator(){} @SuppressWarnings("static-access") public static OptionBuilder inputOption(){ return OptionBuilder.withLongOpt(INPUT_OPTION) .isRequired(false) .withArgName(INPUT_OPTION) .hasArg() .withDescription("The path of the input file"); } //test-main @SuppressWarnings("static-access") public static void main(String []args){ Options opts = new Options(); opts.addOption(DefaultOptionCreator.inputOption().create("i")); BasicParser parser = new BasicParser(); CommandLine cl; try{ cl = parser.parse(opts, args); String inputpath = cl.getOptionValue("i"); System.out.println(inputpath); }catch (ParseException e) { e.printStackTrace(); } } }
?命令行运行:
java -jar *.jar -i jiufehgui
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参考资料:
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Apache Commons