我有类似这样的XML文件
<staticResources><staticMMOResource language="eng" variant="default" version="5" id="../../../shared_ip/pex/pex_shared/images/compatible_config_header-type_1_non_cust.svg">
</staticMMOResource>
</staticXMLResource><staticXMLResource language="eng" variant="default" version="9" id="../../../shared_ip/pex/pci_express_1/topics/pci_express_extended_configuration_space.xml">
</staticXMLResource><staticMMOResource language="eng" variant="default" version="3" id="../../../shared_ip/pex/pci_express_1/images/b2ac21.svg></staticMMOResource></staticResources>
如果ID与特定的ID集匹配,我需要更新版本属性(我已将所有必需的ID存储在数组中)。 数组的ID类似
pci_express_1/topics/pci_express_extended_configuration_space.xml
pci_express_1/images/b2ac21.svg
我需要看起来像
的输出<staticResources><staticMMOResource language="eng" variant="default" version="5" id="../../../shared_ip/pex/pex_shared/images/compatible_config_header-type_1_non_cust.svg">
</staticMMOResource>
</staticXMLResource><staticXMLResource language="eng" variant="default" version="11" id="../../../shared_ip/pex/pci_express_1/topics/pci_express_extended_configuration_space.xml">
</staticXMLResource><staticMMOResource language="eng" variant="default" version="5" id="../../../shared_ip/pex/pci_express_1/images/b2ac21.svg></staticMMOResource></staticResources>
请帮忙!!我是Perl的新人。
答案 0 :(得分:2)
你需要做的是这样的事情:
#!/usr/bin/env perl
use strict;
use warnings;
use XML::Twig;
my @ids = ( "../../../shared_ip/pex/pci_express_1/topics/pci_express_extended_configuration_space.xml" );
my $twig = XML::Twig -> parse ( \*DATA );
foreach my $id ( @ids ) {
foreach my $match ( $twig -> findnodes("staticXMLResource[\@id=\"$id\"]") ) {
$match -> set_att('version', $match->att('version') + 1 );
}
}
$twig -> print;
__DATA__
<XML>
<staticXMLResource language="eng" variant="default" version="9" id="../../../shared_ip/pex/pci_express_1/topics/pci_express_extended_configuration_space.xml">
</staticXMLResource>
</XML>
DATA
进行说明,因为我不得不模拟一些类似于你的XML。你可能不应该这样做。 然后我们打印XML。
您可能会发现set_pretty_print
对格式化非常有用。
E.g:
$twig -> set_pretty_print('indented_a');
编辑:鉴于您已经包含了一些数组内容 - 这些内容与您的属性并不完全匹配,因此您需要稍微改变一下:
#!/usr/bin/env perl
use strict;
use warnings;
use XML::Twig;
my @ids = qw ( pci_express_1/topics/pci_express_extended_configuration_space.xml
pci_express_1/images/b2ac21.svg );
#assemble a regex from the search elements.
my $search = join ( "|", @ids );
$search = qr/($search)/;
#parse XML - you'll probably want "parsefile" or "parse" depending on your
#XML source.
my $twig = XML::Twig -> parse ( \*DATA );
#iterate the children of the root (staticResources) node
# NB - this might not match your larger file.
foreach my $resource ( $twig -> root -> children ) {
#test if the 'id' attribute matches our regex.
#note - regex is unanchored, so substring matches work.
if ( $resource -> att('id') =~ m/$search/ ) {
#increment version id.
$resource -> set_att('version', $resource->att('version') + 1 );
}
}
#set output format
$twig -> set_pretty_print('indented_a');
#print to stdout.
#To print to a file, you may want print {$opened_fh} $twig -> sprint;
$twig -> print;
__DATA__
<staticResources>
<staticXMLResource language="eng" variant="default" version="9" id="../../../shared_ip/pex/pci_express_1/topics/pci_express_extended_configuration_space.xml">
</staticXMLResource>
<staticXMLResource language="eng" variant="default" version="9" id="../../../shared_ip/pex/pci_express_1/topics/pci_express_extended_configuration_space.xml">
</staticXMLResource>
<staticMMOResource language="eng" variant="default" version="3" id="../../../shared_ip/pex/pci_express_1/images/b2ac21.svg"></staticMMOResource>
</staticResources>
我们根据您拥有的模式构建搜索正则表达式$search
。然后我们迭代child
的{{1}}个节点(如果您的XML更大,那么您可能还需要使用root
)。