用于选择自身、前后节点的 XPath 表达式 [英] XPath expression to select self, preceding and following nodes

问题描述

我想根据 TARGET 的内容在文档中选择以下 HTML.IE.如果 TARGET 匹配，则选择所有内容.但是，我不知道该去哪里:id('page')/x:div/span/a='TARGET' – 如何使用父、子和兄弟表达式来获取包含 div、div 前面的 a 和 div<后面的两个 br 标签/代码>

<div><br/><跨度><a>目标</a><a></a><跨度><跨度><a></a></span><a></a><span></span></span><跨度><a></a></span></span>

<br/><br/>

解决方案

使用单个 XPath，例如:

"///*[(self::a and following-sibling::*[1][self::div and span/a='TRAGET']) 或(self::div 和 span/a='TARGET') 或(self::br 和previous-sibling::*[1][self::div and span/a='TARGET']) 或(self::br 和previous-sibling::*[2][self::div 和span/a='TARGET'])]"

请注意，由于未关闭 br 标签，您的文档格式不正确.此外，我没有包含任何命名空间，您可以根据需要添加.

I'd like to select the following HTML in a document, based on the content of TARGET. I.e. if TARGET matches, select everything. However, I'm not sure where to go after: id('page')/x:div/span/a='TARGET' – How to use parent, child, and sibling expressions to get the containing div, the a preceding that div, and the two br tags following the div

<a></a>
<div>
    <br />
    <span>
        <a>TARGET</a>
        <a></a>
        <span>
            <span>
                <a></a>
            </span>
            <a></a>
            <span></span>
        </span>
        <span>
            <a></a>
        </span>
    </span>
</div>
<br />
<br />

解决方案

Use a single XPath like:

"//*[
     (self::a and following-sibling::*[1][self::div and span/a='TRAGET']) or
     (self::div and span/a='TARGET') or
     (self::br and preceding-sibling::*[1][self::div and span/a='TARGET']) or
     (self::br and preceding-sibling::*[2][self::div and span/a='TARGET'])
    ]"

Do note that your document is not well formed due to unclosed br tags. Moreover, I didn't include any namespace, which you can add if necessary.

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