[JAVA100 example]036, directory operations

/**


* <p>title: Directory operations </p>


* <p>description: Demo column directory of files, and move a directory </p>


* <p>copyright:copyright (c) 2003</p>


* <p>Filename:Dir.java</p>


* @version 1.0


*/


import java.io.*;


public class dir{


/**


*<br> Method Description: Implementing Directory Listing


*<br> input Parameters:


*<br> return type:


*/


public string[] Dirlist (String pathName) {


try{


File path = null;


string[] filelist;


//If no directory is specified, the current directory is listed.


if (Pathname.equals (""))


path = new File (".");


Else


path = new File (pathName);


//Get catalog file list


if (path.isdirectory ())


filelist = Path.list ();


Else


return null;


return filelist;


}catch (Exception e) {


System.err.println (e);


return null;


　　}


　}


/**


*<br> Method Description: Move a directory


*<br> Input Parameters: string Sou source directory, string obj new directory


*<br> return type:


*/


public boolean Dirmove (string sou, string obj) {


try{


//Check whether the source file exists


Boolean sexists = (new File (SOU)). Isdirectory ();


if (!sexists) return false;


Boolean oexists = (new File (obj)). Isdirectory ();


//target directory does not exist, create a


if (!oexists) {


(new File (obj)). Mkdirs ();


　　　}





File File = new file (SOU);


file dir = new file (obj);


//Mobile directory


Boolean success = File.renameto (new file (dir, File.getname ()));


if (!success) {


System.out.println ("Copy error!");


return false;


　　　　}


else return true;


}catch (Exception e) {


System.out.println (e);


return false;


　　}





　}


/**


*<br> Method Description: Main method


*<br> input Parameters:


*<br> return type:


*/


public static void Main (string[] args) {


dir d = new Dir ();


if (args.length==0) {


return;


}else{


String cmd = args[0];


if (cmd.equals ("list")) {


if (args.length!=2) return;


string[] stemp = d.dirlist (args[1));


for (int i=0;i<stemp.length;i++)


System.out.println (Stemp[i]);


}else if (cmd.equals ("move")) {


if (args.length!=3) return;


D.dirmove (args[1],args[2]);


　　　}





　　}


　 }


}