使用 XPath 拆分节点值

发布于 2024-10-03 14:23:46 字数 331 浏览 3 评论 0原文

XPath 中有某种 split() 函数吗？假设我有这个 XML：

<root>
   <path>C:\folder\filename</path>
</root>

并且我想检索文件名，我该怎么做？我知道我可以像这样获取节点值：

//path/text()

How can I get only the filename? （我知道有一个 concat() 函数，所以也许有一个 split() 函数？）

原文

Is there some kind of split() function in XPath?
Say I have this XML:

<root>
   <path>C:\folder\filename</path>
</root>

And I want to retrieve filename, how can I do this? I know I can get the node value like this:

//path/text()

How can I get only the filename? (I know there is a concat() function, so maybe there is a split() function?)

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天暗了我发光 2024-10-10 14:23:46

如果您有支持 xpath-2.0 的 API，则可以通过两种方式解决此问题：

替换技术

尝试使用：

fn:replace(string,pattern,replace)

例如

fn:replace(//path/text(),".*/","")

tokenize 技术

您可能会从 tokenize 中获得一些收益：

fn:tokenize(string,pattern)

例如 (感谢 Martin）

tokenize(/root/path, '\\')[last()]

w3schools xml 处理“xsl 函数”文档

If you have an xpath-2.0 capable API, you can solve this in two ways:

replace technique

Try using:

fn:replace(string,pattern,replace)

e.g.

fn:replace(//path/text(),".*/","")

tokenize technique

You may get some mileage from tokenize:

fn:tokenize(string,pattern)

e.g. (thanks to Martin)

tokenize(/root/path, '\\')[last()]

w3schools xml processing "xsl functions" documentation

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养猫人 2024-10-10 14:23:46

虽然我会使用：

tokenize(/*/*, '\\')[last()]

还有许多其他方法来获取所需的字符串：

  codepoints-to-string
    (reverse
      (string-to-codepoints
         (substring-before
            (codepoints-to-string
                 (reverse
                    (string-to-codepoints(/*/*)
                  )
              ),
              '\'
            )
          )
       )
     )

或者：

  substring(/*/*,
            index-of(string-to-codepoints(/*/*),
            string-to-codepoints('\')
            )
            [last()]
          + 1
           )

While I would use:

tokenize(/*/*, '\\')[last()]

there are also numerous other ways to obtain the desired string:

  codepoints-to-string
    (reverse
      (string-to-codepoints
         (substring-before
            (codepoints-to-string
                 (reverse
                    (string-to-codepoints(/*/*)
                  )
              ),
              '\'
            )
          )
       )
     )

Or:

  substring(/*/*,
            index-of(string-to-codepoints(/*/*),
            string-to-codepoints('\')
            )
            [last()]
          + 1
           )

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