Java命令行参数解析

参考  http://blog.csdn.net/mldxs/article/details/36204079

http://rensanning.iteye.com/blog/2161201

import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.BasicParser;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.CommandLine;  

public static void main(String[] args) throws Exception {
  // Create a Parser
  CommandLineParser parser = new BasicParser( );
  Options options = new Options( );
  options.addOption("h", "help", false, "Print this usage information");
  options.addOption("v", "verbose", false, "Print out VERBOSE information" );
  options.addOption("f", "file", true, "File to save program output to");
  // Parse the program arguments
  CommandLine commandLine = parser.parse( options, args );
  // Set the appropriate variables based on supplied options
  boolean verbose = false;
  String file = "";  

  if( commandLine.hasOption('h') ) {
    System.out.println( "Help Message")
    System.exit(0);
  }
  if( commandLine.hasOption('v') ) {
    verbose = true;
  }
  if( commandLine.hasOption('f') ) {
    file = commandLine.getOptionValue('f');
  }
} 

<dependency>
    <groupId>commons-cli</groupId>
    <artifactId>commons-cli</artifactId>
    <version>1.2</version>
</dependency>

熟悉Linux命令的都知道几乎所有程序都会提供一些命令行选项。而命令行选项有两种风格：以“-”开头的单个字符的POSIX风格；以“--”后接选项关键字的GNU风格。 

假定我们的程序需要以下选项： 

引用

Options:
  -t,--text use given information(String)
  -b display current time(boolean)
  -s,--size use given size(Integer)
  -f,--file use given file(File)
  -D <property=value> use value for given property(property=value)

(1)Apache的Commons-CLI 
版本：commons-cli-1.2.jar 

支持三种CLI选项解析： 

• BasicParser：直接返回参数数组值
• PosixParser：解析参数及值(-s10)
• GnuParser：解析参数及值(--size=10)

对于动态参数： 
-Dkey=value 

需要代码设置参数，返回类型需要转换。 

args = new String[]{"-t", "rensanning", "-f", "c:/aa.txt", "-b", "-s10", "-Dkey1=value1", "-Dkey2=value2" };  

try {
    // create Options object
    Options options = new Options();
    options.addOption(new Option("t", "text", true, "use given information(String)"));
    options.addOption(new Option("b", false, "display current time(boolean)"));
    options.addOption(new Option("s", "size", true, "use given size(Integer)"));
    options.addOption(new Option("f", "file", true, "use given file(File)"));  

    @SuppressWarnings("static-access")
    Option property = OptionBuilder.withArgName("property=value")
            .hasArgs(2)
            .withValueSeparator()
            .withDescription("use value for given property(property=value)")
            .create("D");
    property.setRequired(true);
    options.addOption(property);  

    // print usage
    HelpFormatter formatter = new HelpFormatter();
    formatter.printHelp( "AntOptsCommonsCLI", options );
    System.out.println();  

    // create the command line parser
    CommandLineParser parser = new PosixParser();
    CommandLine cmd = parser.parse(options, args);  

    // check the options have been set correctly
    System.out.println(cmd.getOptionValue("t"));
    System.out.println(cmd.getOptionValue("f"));
    if (cmd.hasOption("b")) {
        System.out.println(new Date());
    }
    System.out.println(cmd.getOptionValue( "s" ));
    System.out.println(cmd.getOptionProperties("D").getProperty("key1") );
    System.out.println(cmd.getOptionProperties("D").getProperty("key2") );  

} catch (Exception ex) {
    System.out.println( "Unexpected exception:" + ex.getMessage() );
} 

(2)Args4J 
版本：args4j-2.0.29.jar 

基于注解。 

args = new String[] {"-t", "rensanning", "-f", "c:/aa.txt", "-b", "-s", "10", "-D", "key1=value1" , "-D", "key2=value2"};  

try {
    Args4jOptions options = new Args4jOptions();
    CmdLineParser parser = new CmdLineParser(options);  

    // print usage
    parser.printUsage(System.out);
    System.out.println();  

    parser.parseArgument(args);  

    // check the options have been set correctly
    System.out.println(options.getText());
    System.out.println(options.getFile().getName());
    if(options.isBol()) {
        System.out.println(new Date());
    }
    System.out.println(options.getSize());
    System.out.println(options.getProperties().get("key1"));
    System.out.println(options.getProperties().get("key2"));  

} catch (Exception ex) {
    System.out.println("Unexpected exception:" + ex.getMessage());
}  

@Option(name = "-t", aliases = "-text", usage = "use given information(String)")
private String text;
@Option(name = "-b", usage = "display current time(boolean)")
private boolean bol = false;
@Option(name = "-s", aliases = "-size", usage = "use given size(Integer)")
private int size = 0;
@Option(name = "-f", aliases = { "-file" }, metaVar = "<file>", usage = "use given file(File)")
private File file;  

private Map<String, String> properties = new HashMap<String, String>();
@Option(name = "-D", metaVar = "<property>=<value>", usage = "use value for given property(property=value)")
public void setProperty(final String property) {
    String[] arr = property.split("=");
    properties.put(arr[0], arr[1]);
}  

(3)JCommander 
版本：jcommander-1.45.jar 

基于注解、TestNG作者开发。