Question

我想在2个h1标签之间获取所有html。实际任务是根据h1（标题1）标记将html分成帧（章节）。

感谢任何帮助。

由于苏尼

Answer 1

如果您希望获取并处理两个连续h1标记之间的所有元素，您可以使用兄弟姐妹。这是一些示例代码：

public static void h1s() {
  String html = "<html>" +
  "<head></head>" +
  "<body>" +
  "  <h1>title 1</h1>" +
  "  <p>hello 1</p>" +
  "  <table>" +
  "    <tr>" +
  "      <td>hello</td>" +
  "      <td>world</td>" +
  "      <td>1</td>" +
  "    </tr>" +
  "  </table>" +
  "  <h1>title 2</h1>" +
  "  <p>hello 2</p>" +
  "  <table>" +
  "    <tr>" +
  "      <td>hello</td>" +
  "      <td>world</td>" +
  "      <td>2</td>" +
  "    </tr>" +
  "  </table>" +
  "  <h1>title 3</h1>" +
  "  <p>hello 3</p>" +
  "  <table>" +
  "    <tr>" +
  "      <td>hello</td>" +
  "      <td>world</td>" +
  "      <td>3</td>" +
  "    </tr>" +
  "  </table>" +    
  "</body>" +
  "</html>";
  Document doc = Jsoup.parse(html);
  Element firstH1 = doc.select("h1").first();
  Elements siblings = firstH1.siblingElements();
  List<Element> elementsBetween = new ArrayList<Element>();
  for (int i = 1; i < siblings.size(); i++) {
    Element sibling = siblings.get(i);
    if (! "h1".equals(sibling.tagName()))
      elementsBetween.add(sibling);
    else {
      processElementsBetween(elementsBetween);
      elementsBetween.clear();
    }
  }
  if (! elementsBetween.isEmpty())
    processElementsBetween(elementsBetween);
}

private static void processElementsBetween(
    List<Element> elementsBetween) {
  System.out.println("---");
  for (Element element : elementsBetween) {
    System.out.println(element);
  }
}

Answer 2

我不知道Jsoup那么好，但是直接的方法看起来像这样：

public class Test {

    public static void main(String[] args){

        Document document = Jsoup.parse("<html><body>" +
            "<h1>First</h1><p>text text text</p>" +
            "<h1>Second</h1>more text" +
            "</body></html>");

        List<List<Node>> articles = new ArrayList<List<Node>>();
        List<Node> currentArticle = null;

        for(Node node : document.getElementsByTag("body").get(0).childNodes()){
            if(node.outerHtml().startsWith("<h1>")){
                currentArticle = new ArrayList<Node>();
                articles.add(currentArticle);
            }

            currentArticle.add(node);
        }

        for(List<Node> article : articles){
            for(Node node : article){
                System.out.println(node);
            }
            System.out.println("------- new page ---------");
        }

    }

}

你知道文章的结构吗？它总是一样吗？你想对这些文章做什么？您是否考虑过在客户端拆分它们？这将是一个简单的jQuery工作。

Answer 3

迭代连续<h>元素之间的元素似乎很好，除了一件事。不属于任何标记的文字，例如<h1/>this<h1/>。为了解决这个问题，我实现了splitElemText函数来获取此文本。首先使用此方法拆分整个父元素。然后，除元素外，处理分割文本中的合适条目。如果您需要原始html，请删除对htmlToText的来电。

/** Splits the text of the element <code>elem</code> by the children
  * tags.
  * @return An array of size <code>c+1</code>, where <copde>c</code>
  * is the number of child elements.
  * <p>Text after <code>n</code>th element is found in <code>[n+1]</code>.
  */
public static String[] splitElemText(Element elem)
{
  int c = elem.children().size();
  String as[] = new String[c + 1];
  String sAll = elem.html();
  int iBeg = 0;
  int iChild = 0;
  for (Element ch : elem.children()) {
    String sChild = ch.outerHtml();
    int iEnd = sAll.indexOf(sChild, iBeg);
    if (iEnd < 0) { throw new RuntimeException("Tag " + sChild
                    +" not found in its parent: " + sAll);
    }
    as[iChild] = htmlToText(sAll.substring(iBeg, iEnd));
    iBeg = iEnd + sChild.length();
    iChild += 1;
  }
  as[iChild] = htmlToText(sAll.substring(iBeg));
  assert(iChild == c);
  return as;
}

public static String htmlToText(String sHtml)
{
  Document doc = Jsoup.parse(sHtml);
  return doc.text();
}

Jsoup：如何在2个标头标签之间获取所有html

3 个答案: