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。 

Java代码  

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。 

Java代码  

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());  
}  

Java代码  

@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。 

Java代码  

 

args = new String[] {"-t", "rensanning", "-f", "c:/aa.txt", "-b", "-s", "10", "-D", "key1=value1" , "-D", "key2=value2"};  
  
try {  
    JCmdrOptions options = new JCmdrOptions();  
    JCommander jcmdr = new JCommander(options, args);  
  
    // print usage  
    jcmdr.setProgramName("AntOptsCommonsCLI");  
    jcmdr.usage();  
  
    // 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.getDynamicParams().get("key1"));  
    System.out.println(options.getDynamicParams().get("key2"));  
  
} catch (Exception ex) {  
    System.out.println("Unexpected exception:" + ex.getMessage());  
}  

 

Java代码  

 

@Parameter(names = { "-t", "-text" }, description = "use given information(String)")  
private String text;  
@Parameter(names = { "-b" }, description = "display current time(boolean)")  
private boolean bol = false;  
@Parameter(names = { "-s", "-size" }, description = "use given size(Integer)")  
private int size = 0;  
@Parameter(names = { "-f", "-file" }, description = "use given file(File)")  
private File file;  
@DynamicParameter(names = "-D", description = "use value for given property(property=value)")  
public Map<String, String> dynamicParams = new HashMap<String, String>();