这个xpath是一个有效的XPath表达式吗? (它做它应该做的).
#!/usr/bin/env perl use strict; use warnings; use 5.012; use XML::LibXML; my $string =<<EOS; <result> <cd> <artists> <artist class="1">Pumkinsingers</artist> <artist class="2">Max and Moritz</artist> </artists> <title>Hello,Hello</title> </cd> <cd> <artists> <artist class="3">Green Trees</artist> <artist class="4">The Leons</artist> </artists> <title>The Shield</title> </cd> </result> EOS #/ my $parser = XML::LibXML->new(); my $doc = $parser->load_xml( string => $string ); my $root = $doc->documentElement; my $xpath = '/result/cd[artists[artist[@class="2"]]]/title'; my @nodes = $root->findnodes( $xpath ); for my $node ( @nodes ) { say $node->textContent; }