如何在jsoup中获取元素的第一级子元素

Question

In jsoup Element.children() returns all children (descendants) of Element. But, I want the Element's first-level children (direct children).

Which method can I use?

Answer 1

Element.children() returns direct children only. Since you get them bound to a tree, they have children too.

If you need the direct children elements without the underlying tree structure then you need to create them as follows

public static void main(String... args) {

    Document document = Jsoup
            .parse("<div><ul><li>11</li><li>22</li></ul><p>ppp<span>sp</span</p></div>");

    Element div = document.select("div").first();
    Elements divChildren = div.children();

    Elements detachedDivChildren = new Elements();
    for (Element elem : divChildren) {
        Element detachedChild = new Element(Tag.valueOf(elem.tagName()),
                elem.baseUri(), elem.attributes().clone());
        detachedDivChildren.add(detachedChild);
    }

    System.out.println(divChildren.size());
    for (Element elem : divChildren) {
        System.out.println(elem.tagName());
    }

    System.out.println("\ndivChildren content: \n" + divChildren);

    System.out.println("\ndetachedDivChildren content: \n"
            + detachedDivChildren);
}

Output

2
ul
p

divChildren content: 
<ul>
 <li>11</li>
 <li>22</li>
</ul>
<p>ppp<span>sp</span></p>

detachedDivChildren content: 
<ul></ul>
<p></p>

Answer 2

This should give you the desired list of direct descendants of the parent node:

Elements firstLevelChildElements = doc.select("parent-tag > *");

OR You can also try to retrieve the parent element, get the first child node via child(int index) and then try to retrieve siblings of this child via siblingElements() .

This will give you the list of first level children excluding the used child, however you'd have to add the child externally.

Elements firstLevelChildElements = doc.child(0).siblingElements();

Answer 3

您始终可以将ELEMENT.child（index）与索引一起使用，您可以选择所需的子项。

Answer 4

Here you can get the value of first-level children

 Element addDetails = doc.select("div.container > div.main-content > div.clearfix > div.col_7.post-info > ul.no-bullet").first();
    Elements divChildren = addDetails.children();
    for (Element elem : divChildren) {
       System.out.println(elem.text());
                }