扶凯

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本文链接: http://www.php-oa.com/2009/08/13/outputting-a-hash-as-xml.html

因为使用需要,做一个xml的接口.需要给hash转成xml,google了一下,发现了如下极品…得好好学习

#!/usr/bin/perl

use strict;
use XML::Twig;

my %all = (
 Video => {
        Width => '960pixels',
        CodecID => 'H264',
        Height => '540pixels',
  },
  Audio => {
        FormatInfo => 'AudioCoding3',
        Streamsize => '120MiB',
        Samplingrate => '48.0KHz',
  },
  General => {
        Format  => 'AVI',
        Duration => '43mn45s',
        Filesize => '436MiB',
  },
 );

my $twig = XML::Twig->new(pretty_print => 'indented');
my $elt = create_element(info => \%all);
$twig->set_root($elt);
$twig->print();

sub create_element{
    my $gi   = shift;
    my $data = shift;
    my $t = XML::Twig::Elt->new($gi);

    if (ref $data){
        while (my ($k,$v) = each(%$data)){
            create_element($k, $v)->paste(last_child => $t);
        }
    }else{
        $t->set_text($data);
    }
    $t;
}

测试,上面有个all的hash的hash.转换后如下输出

# perl test2.pl

<info>
  <Video>
    <Height>540pixels</Height>
    <Width>960pixels</Width>
    <CodecID>H264</CodecID>
  </Video>
  <General>
    <Filesize>436MiB</Filesize>
    <Duration>43mn45s</Duration>
    <Format>AVI</Format>
  </General>
  <Audio>
    <Samplingrate>48.0KHz</Samplingrate>
    <FormatInfo>AudioCoding3</FormatInfo>
    <Streamsize>120MiB</Streamsize>
  </Audio>
</info>

要是想输出到一个文件之类,可以用下面的方法

参考:
www.perlmonks.org/
tech.idv2.com/2007/09/14/generate-xml-with-xml-dom/