我原来的xml是：

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
 <property>
   <name>test.name</name>
   <value>help</value>
   <description>xml issue</description>
 </property>

….

代码是：

my $parser =XML::LibXML->new();
my $tree   =$parser->parse_file($file) or die $!;
my $root   =$tree->getDocumentElement;

my $searchPath="/configuration/property[name=\"$name\"]/value/text()";
my ($val)=$root->findnodes($searchPath);

$val->setData($new_val);
open (UPDXML,"> $file") or die "ERROR: Failed to write into $file...";
 print UPDXML $root->toString(1);
close (UPDXML);

我尝试使用print UPDXML $root-> toStringC14N(1),但它没有帮助……