根据body的内容查找h2标签的@class="subtitle"的值

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<pre name="code" class="html"><body class="api jquery listing"><div id="container">        <div id="content-wrapper" class="clearfix row"><div class="content-right twelve columns">        <div id="content">                <div class="container fl">                 <h1 class="title">产品公告查询接口管理</h1>                <!-- api start -->                                  <h2 class="subtitle" id="getInfo">查询产品公告详情</h2>根据body的内容 查找h2标签的@class="subtitle"的值jrhmpt01:/root# cat yy1.pl use  LWP::UserAgent;use DBI;  use POSIX;use Data::Dumper;use HTML::TreeBuilder;my $ua = LWP::UserAgent->new;$ua->timeout(10);$ua->env_proxy;$ua->agent("Mozilla/8.0");  use HTML::TreeBuilder::XPath;   $tree= HTML::TreeBuilder::XPath->new;  $tree->parse_file( "ProductForcastController.html");my @title=  $tree->findvalues('/html/body//h2[@class="subtitle"]');print "\@title is @title\n"jrhmpt01:/root# perl yy1.pl @title is 查询产品公告详情 查询产品公告

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根据body的内容 查找h2标签的@class="subtitle"的值

根据body的内容查找h2标签的@class="subtitle"的值