如何在jsoup中获取元素的第一级子元素 [英] How to get first-level children of an element in jsoup

问题描述

在jsoup中 Element.children（）返回Element的所有子项（后代）。但是，我想要Element的一级孩子（直接孩子）。

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

我可以使用哪种方法？

Which method can I use?

推荐答案

Element.children（）仅返回直接子项。由于你将它们绑定到一棵树上，它们也有孩子。

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

如果你需要没有底层树结构的直接子元素，那么你需要创建它们如下

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);
}

输出

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>

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