Java implementation of Windows dir command

In order to make a file management system to achieve a very rough small example, the feeling is still worth studying. The following is the source code:

import Java.util.Comparator;


import Java.io.File;


　　　　 /**


* Created by IntelliJ idea.<br>


* <B>USER</B>: leizhimin<br>


* <B>DATE</B>: 2008-7-18 22:43:44<br>


* <b>note</b&gt: File sort, sorted by first directory after file way


　　　　 */


public class Filecomparator implements comparator<file> {


public int Compare (file O1, file O2) {


if (o1.isdirectory () && o2.isdirectory ()) return O1.compareto (O2);


Else if (o1.isdirectory () &&!o2.isdirectory ()) return-1;


Else if (!o1.isdirectory () && o2.isdirectory ()) return 1;


else return O1.compareto (O2);


　　　　　　 }


　　　　 }


Import Java.io.File;


import java.util.*;


import java.sql.Date;


import Java.text.DateFormat;


import Java.text.SimpleDateFormat;


import Java.text.NumberFormat;


　　　　 /**


* Created by IntelliJ idea.<br>


* <B>USER</B>: leizhimin<br>


* <B>DATE</B>: 2008-7-18 22:02:30<br>


* <b>note</b&gt: A routine that simulates the Dir test


　　　　 */


public class Testfile {


public static DateFormat df = new SimpleDateFormat ("Yyyy-mm-dd hh:mm");


int nl = 18;


public static void Main (String args[]) {


test ();


　　　　　　 }


public static void Test () {


System.out.println ("----------Test ()----------");


File File = new file ("F:\\soft_dev");


//File.isdirectory ();


//System.out.println (File.pathseparator);


//System.out.println (File.pathseparatorchar);


//System.out.println (File.separator);


//System.out.println (File.separatorchar);


Filecomparator fc = new Filecomparator ();


file[] lf = File.listfiles ();


Arrays.sort (LF, FC); Array sort


for (File f:lf) {


String datastr = Df.format (New Date (F.lastmodified ());


if (f.isdirectory ()) {


System.out.print (datastr + "<DIR>");


} else {


System.out.print (Datastr + "" + getformatstring (string.valueof (Numberformat.getinstance (). Format (F.length ())));


　　　　　　　　　　 }


System.out.println ("" + F.getname ());


　　　　　　　　 }


　　 }


//Format function


public static string getformatstring (string s) {


int nb = 12-s.length ();


StringBuilder sb = new StringBuilder ();


if (nb > 0) {


for (int n = 1; n <= nb; n++) {


sb = Sb.append ("");


　　　　　　　　　　 }


　　　　　　　　 }


return Sb.append (s). ToString ();


　　　　　　 }


　　　　 }