Question

我正在使用jsoup从这样的网页中查找类

        Document doc = null;
        try {
            doc = Jsoup.connect(strings[0]).get();
            // Get document (HTML page) title
            String title = doc.title();
            // Get meta info
            Elements metaElems = doc.select("div");
            for (Element metaElem : metaElems) {

                if (metaElem.hasClass("job-title")){
                    System.out.println("found a job  " + "\r\n" + metaElem.toString() ); //this works finds all job titles and links
                }
                if (metaElem.hasClass("detail-body")){
                    System.out.println("detail-body " + "\r\n" + metaElem.toString() ); //this works finds all job titles and links
                }

            }
        } catch (IOException e) {
            e.printStackTrace();
        }

现在我想在detail-body中获取子类（请参阅下面的代码段），如下所示

<li class="location">

尝试从我的循环中获取它

if (metaElem.hasClass("location")){
          //do stuff
                     );

不起作用，我认为这是因为它是一个细节 - 身体类的孩子，但我相当新的所以可能是错误的下面是从上面的代码打印的内容的片段（一次迭代）任何人告诉我如何在不使用子串的情况下获取内部信息（不是我反对它我只想让一切都井然有序，我可以使用子串，如果这是唯一的方法）

found a job  
<div class="job-title"> 
<a href="/job/class-2-driver/driveforce-job77343151" data-dynamic-qs="?
entryurl=%2fjobs%2fin-%3fradius%3d5%2377343151" title="See details for a 
Class 2 
Driver in West Midlands (matches on class 2 driver)"> <h2>Class 2 
Driver</h2> 
</a> 
</div>
detail-body 
 <div class="detail-body"> 
  <div class="row"> 
   <div id="headerListContainer" class="col-xs-12 col-sm-8"> 
 <div class="applied-col pull-right" style="display: none;"> 
  <span class="applied-icon">Applied</span> 
 </div> 
 <ul class="header-list">
  <li class="location"> <span> <span> <a href="/jobs/in-west-midlands">West 
     Midlands</a>, <span>WR1 1UK</span> </span> </span> </li> 
  <li class="salary" title="salary">Salary ranges from &pound;9-&pound;10 
   pounds per hour</li> 
 </ul> 
 </div> 
 <div id="recruiterImageContainer" class="col-xs-5 col-sm-4 pull-right"> 
 <div class="recruiter-image"> 
  <a href="/jobs-at/driveforce/jobs" title="DriveForce"> <img data-
    original="/companylogos/0b01e3bd83ec4919a44b7b145725e15a.png" 
    class="lazy" /> </a> 
 </div> 
 </div> 
 <div class="col-xs-7 col-sm-8"> 
 <ul class="detail-list"> 
  <li class="job-type"> <span title="employment type">Contract</span> </li> 
  <li class="company" title="hiring organization"> <h3> <a href="/jobs-
     at/driveforce/jobs" title="DriveForce">DriveForce</a> </h3> </li> 
  <li class="date-posted" title="posted date"> <span> Today </span> </li> 
 </ul> 
 </div> 
 </div> 
 <div class="row detail-footer"> 
 <div class="col-sm-12 col-md-10"> 
 <div title="job details">    
      <p class="job-intro">DriveForce are currently recruiting for Class 2 
      drivers for a post based in Kidderminster! Driver duties will involve 
      going to 
      various locations disposing of confidential documents. To be 
      considered drivers 
      must have held their Class 2 license for 2 years or longer, and have 
      no more 
 than 6 points on their licens...</p> 
 </div> 
 </div> 
 <div class="email-job-col visible-xs visible-sm col-xs-4 col-md-2 col-sm-
  4"> 
 <button type="button" class="btn btn-default btn-sendjob" data-job-
  id="77343151" data-job-
  token="tqhJrOYD5cVRoPcna3gQfN/0cu8XVm1rV/LjjT2lvIz+o7dcujmniqJQMk8Kix2L" 
  data-
 toggle="modal" data-target="#sendJobModal">Send</button> 
 </div> 
 <div class="see-job-col visible-xs visible-sm col-xs-4 col-sm-4 col-md-4 "> 
 <a class="btn btn-default btn-seejob" href="/job/class-2-driver/driveforce-
   job77343151" data-dynamic-qs="?entryurl=%2fjobs%2fin-
   %3fradius%3d5%2377343151">See</a> 
 </div> 
 <div class="save-job-col col-xs-4 col-sm-4 col-md-2"> 
 <button id="77343151" class="saved-jobs-icon btn btn-default btn-savejob 
   btn-mobile-hover-fix disabled" disabled="disabled">Save</button> 
 </div> 
 </div> 
 <div class="row hidden-xs"> 
 <div class="col-xs-12"> 
 <div class="discipline-related-links"> 
  <ul> 
   <li class="col-xs-12 col-md-6"><a href="/jobs/logistics/in-west-
    midlands">See more Logistics jobs in West Midlands</a></li> 
   <li class="col-xs-12 col-md-6"><a href="/jobs/logistics">See all 
     Logistics jobs</a></li> 
  </ul> 
      </div> 
     </div> 
    </div> 
  </div>

Answer 1

JSoup＆＃39; s selector syntax允许您选择具有给定类的特定类型的所有元素。

在您提出的问题中

我希望在详细信息正文中获取子类（请参阅下面的代码段），如<li class="location">

以下选择器将查找具有类li的{{1}}类型的所有元素，无论这些元素是否嵌套。

location

在附加到您的操作系统的HTML中，Document doc = Jsoup.parse(html); Elements elements = doc.select("li.location"); for (int i = 0; i < elements.size(); i++) { System.out.println(elements.get(i).text()); }的div嵌套在class=location ul内，您可以使用JSoup＆＃39; sparent-child awareness来仅选择元素键入class=header-list，其li类嵌套在location内，例如：

<ul class="header-list">

如何使用jsoup从网页获取子类

1 个答案: