Java get, delete files and directories

1  Packagejavatest;2 3 ImportJava.io.File;4 Importjava.util.ArrayList;5 ImportJava.util.regex.Pattern;6 7 classFileUtils8 {9      Public Static voidMain (string[] args)Ten     { OneString dir = "C:\\users\\hp\\desktop\\test"; A  -System.out.println ("Recursively get all files in this directory:"); -          for(File f:fileutils.getfilesrecursive (dir)) the         { - System.out.println (F.getabsolutepath ()); -         } -          +System.out.println ("Recursively get all subdirectories under this directory:")); -          for(File f:fileutils.getdirecotriesrecursive (dir)) +         { A System.out.println (F.getabsolutepath ()); at         } -          -System.out.println ("Delete all. html files under this directory"); -Removefiles (dir,NULL); -System.out.println ("Done."); -     } in      -     /*** * * * To get all the files in a directory recursively * * * **/ to      Public StaticArraylist<file>getfilesrecursive (String dir) +     { -arraylist<file> files =NewArraylist<file>(); the  *File TargetDir =NewFile (dir); $         if(Targetdir.exists ())Panax Notoginseng         { -              for(File file:targetDir.listFiles ()) the             { +                 if(File.isfile ()) A                 { the files.add (file); +                 } -                 Else if(File.isdirectory ()) $                 { $ Files.addall (Getfilesrecursive (File.getabsolutepath ())); -                 } -             } the         } - Wuyi         returnfiles; the     } -      Wu     /*** * * * recursively get all subdirectories under a directory * * * **/ -      Public StaticArraylist<file>getdirecotriesrecursive (String dir) About     { $Arraylist<file> dirs =NewArraylist<file>(); -  -File TargetDir =NewFile (dir); -         if(Targetdir.exists ()) A         { +              for(File f:targetdir.listfiles ()) the             { -                 if(F.isdirectory ()) $                 { the Dirs.add (f); the Dirs.addall (Getdirecotriesrecursive (F.getabsolutepath ())); the                 } the             } -         } in  the         returndirs; the     } About      the     /*** * * * * Delete all files under a directory where the file name matches the filter, then delete the empty subdirectory * * * **/ the      Public Static voidremovefiles (String targetDir, string Fileregex) the     { +arraylist<file> files =getfilesrecursive (targetDir); -         //Delete all files and subdirectories in this directory without filtering criteria the         if(Fileregex = =NULL|| Fileregex.equals ("") )Bayi         { the             //Delete all files first. the              for(File file:files) -             { - File.delete (); the             } the             //Remove all empty directories from the inside out. theArraylist<file> dirs=getdirecotriesrecursive (targetDir); the              for(inti=0;i< dirs.size (); + +i) -             { theDirs.get (Dirs.size ()-1-i). Delete (); the             } the         }94         Else the         { the             //filter file names with regular expressions thePattern Pat =Pattern.compile (Fileregex);98              for(File file:files) About             { -                 if(Pat.matcher (File.getabsolutepath ()). Find ())101 File.delete ();102             }103         }104     } the}

Java get, delete files and directories