convert file name to utf-8

convertname.pl

#! /usr/bin/perl -w
# rename the gbk filename to utf-8
use strict;
use Encode;

my $dir = $ENV{'PWD'};
opendir DIR, $dir or die "Can not open \"$dir\"\n";
my @filelist = readdir DIR;
my $file = '';
for $file (@filelist)
{
    chomp $file;
    if ($file ne '.' && $file ne '..')
    {
            my $utf8str = encode("utf-8", decode("gbk",$file));
            chomp $utf8str;
            `mv "$file" "$utf8str"`;
    }
}

closedir DIR;

@filelist = ();
opendir DIR, $dir or die "Can not open \"$dir\"\n";
@filelist = readdir DIR;
for $file (@filelist)
{
    print "$file\n";
}

closedir DIR;

great! how to use, please.