Apache Commons CLI

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#apache #command #cli #CLI

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本文介绍了一个使用Apache Commons CLI库解析命令行选项的例子。该库提供API来解析传递给程序的命令行选项，并能打印帮助消息详细说明命令行工具的可用选项。

The Apache Commons CLI library provides an API for parsing command line options passed to programs. It's also able to print help messages detailing the options available for a command line tool.

Apache Commons CLI

example ：

import org.apache.commons.cli.*;

public class MyCLI {

    public static void main(String[] args)  {

        Options options = new Options();

        options.addOption("t", false, "display current time");
        options.addOption("c", true, "country code");
        options.addOption("d", true, "ddddddddd");
        options.addOption("e", true, "eeeeeeeee");
        options.addOption("f", true, "fffffffff");

        CommandLineParser parser = new DefaultParser();

        CommandLine commandLine = null;
        try {
            commandLine = parser.parse(options, args);
        } catch (ParseException e) {
            HelpFormatter formatter = new HelpFormatter();
            formatter.printHelp("help", options);
        }

        if (commandLine.hasOption("t")) {
            System.out.println(commandLine.getOptionValue("t"));
        }

        if (commandLine.hasOption("c")) {
            System.out.println(commandLine.getOptionValue("c"));
        }

        if (commandLine.hasOption("d")) {
            System.out.println(commandLine.getOptionValue("d"));
        }

        if (commandLine.hasOption("e")) {
            System.out.println(commandLine.getOptionValue("e"));
        }

        if (commandLine.hasOption("f")) {
            System.out.println(commandLine.getOptionValue("f"));
        }
    }
}

maven 打包生成jar


    <build>
        <plugins>
            <plugin>
                <artifactId>maven-assembly-plugin</artifactId>
                <configuration>
                    <archive>
                        <manifest>
                            <mainClass>com.MyCLI</mainClass>
                        </manifest>
                    </archive>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                </configuration>
                <executions>
                    <execution>
                        <id>make-assemble</id>
                        <phase>package</phase>
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>