如何使用Perl的XML :: Twig向XML添加子元素? [英] How do I add child elements to XML using Perl's XML::Twig?

问题描述

我有以下XML文件:

<SOURCE_SERVER>
  <SERVER HOSTNAME="serv1">
      <CIFS_SERVICE NETBIOSNAME="serv1"/>
  </SERVER>
  <SERVER HOSTNAME="serv2">
  </SERVER>
<SOURCE_SERVER>

现在，我想将子级<CIFS_SERVICE NETBIOSNAME="serv2"/>添加到<SERVER HOSTNAME="serv2">.我该如何使用 XML :: Twig ?

Now, I want to add child <CIFS_SERVICE NETBIOSNAME="serv2"/> to <SERVER HOSTNAME="serv2">. How do I do this using XML::Twig?

推荐答案

以下是结合我认为对您的问题的合理解决方案的解决方案.以下代码基于文档中提供的过滤示例.

Here is a solution incorporating what I think are reasonable fixes to your question. The code below is based on the filtering example given in the documentation.

#!/usr/bin/perl

use strict;
use warnings;

use XML::Twig;

my $t = XML::Twig->new(
    twig_roots => { SERVER => \&update },
    twig_print_outside_roots => 1,
);

$t->parse(\*DATA);

sub update {
    my ($t, $server) = @_;
    if ( 'serv2' eq $server->att('HOSTNAME') ) {
        $server->insert(
            CIFS_SERVICE => { NETBIOSNAME => 'serv2' },
        );
    }
    $server->print;
}


__DATA__
<SOURCE_SERVER>
  <SERVER HOSTNAME="serv1">
      <CIFS_SERVICE NETBIOSNAME="serv1" />
  </SERVER>
  <SERVER HOSTNAME="serv2">
  </SERVER>
</SOURCE_SERVER>

输出:

C:\Temp> x
<SOURCE_SERVER>
  <SERVER HOSTNAME="serv1"><CIFS_SERVICE NETBIOSNAME="serv1"/></SERVER>
  <SERVER HOSTNAME="serv2"><CIFS_SERVICE NETBIOSNAME="serv2"/></SERVER>
</SOURCE_SERVER>

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