perl使用xml::simple来读写xml

一 读xml

1）xml实例

<?xml version="1.0" encoding="UTF-8"?>
<employees> 
  <employee age = "30">
    <name>linux</name>
    <country>US</country>
  </employee>  
  <employee age = "10">
    <name>mac</name>
    <country>US</country>
  </employee>
  <employee age = "20"> 
    <name>windows</name>
    <country>US</country>
  </employee>
</employees>

2）代码

use File::Basename;
use XML::Simple;
use Data::Dumper;

my $xmlfile = dirname($0) . "\\employees.xml";
if (-e $xmlfile)
{
    print "-----------------------------------------\n";
    my $userxs = XML::Simple->new(KeyAttr => "name");
    my $userxml = $userxs->XMLin($xmlfile);
    # print output
    print Dumper($userxml);
    
    my %allemployees = %{$userxml->{employee}};
    foreach my $key (keys(%allemployees))
    {
      print $key . " ";
      print $allemployees{$key}{"age"} . "\n";
    }

    print "-----------------------------------------\n";
       my $userxsT = XML::Simple->new(ForceArray => 1);
    my $userxmlT = $userxsT->XMLin($xmlfile);
    # print output
    print Dumper($userxmlT); 
    
    my @allemployeeT = @{$userxmlT->{"employee"}};
    foreach my $employee (@allemployeeT)
    {
      print $employee->{"name"}[0] . " ";
      print $employee->{"age"} . "\n";
    }    
}

3）结果

二 写xml

代码：

use File::Basename;
use XML::Simple;
use Data::Dumper;

print "-----------------------------------------\n";
# create array
my @arr = [ 
        {'country'=>'england', 'capital'=>'london'},
        {'country'=>'norway', 'capital'=>'oslo'},
        {'country'=>'india', 'capital'=>'new delhi'} ];

# create object
my $xml = new XML::Simple(NoAttr=>1, RootName=>'dataroot');

# convert Perl array ref into XML document 
my $data = $xml->XMLout(\@arr,outputfile => "output1.xml");


print "-----------------------------------------\n";
my $str=<<_XML_STRING_;
<config logdir="/var/log/foo/" debugfile="/tmp/foo.debug">
<server name="sahara" osname="solaris" osversion="2.6">
  <address>10.0.0.101</address>
  <address>10.0.1.101</address>
</server>
<server name="gobi" osname="irix" osversion="6.5">
  <address>10.0.0.102</address>
</server>
<server name="kalahari" osname="linux" osversion="2.0.34">
  <address>10.0.0.103</address>
  <address>10.0.1.103</address>
</server>
</config>
_XML_STRING_

my $xml_ref=XMLin($str,KeepRoot => 1);
my $xml_str=XMLout($xml_ref,outputfile => "output2.xml");
print "-----------------------------------------\n";

三 更多

常用参数：