使用正则表达式和多个变量遍历文件

Question

我正在尝试从文本文件中提取 html。这是它的样子：

<html>

<cool class="what"> idk1 </cool>
<lame id="hm">idc1 </lame>
<lame id="hm"> idc2 </lame>
<lame id="hm"> idc3</lame>
<lame id="hm"> idc4 </lame>
<confused id="allTheTime"> abc1 </confused>

<cool class="what"> idk2 </cool>
<lame id="hm"> </lame>
<lame id="hm"> idc2 </lame>
<lame id="hm">  </lame>
<lame id="hm"> idc4 </lame>
<confused id="allTheTime"> abc2 </confused>

<cool class="what"> idk3 </cool>
<confused id="allTheTime"> abc3 </confused>

</html>

下面是我的代码：

$html = Get-Content -path 'C:\Users\bob\Desktop\tester.txt' -Raw
$wantedData1 = ($html | select-string '(?<=<cool class="what">\s+)(.*?)(?=\s+</cool>)' -allMatches | foreach {$_.Matches} | Foreach {$_.Value})
$wantedData2 = ($html | select-string '(?<=<lame id="hm">\s+)(.*?)(?=\s+</lame>)' -allMatches | foreach {$_.Matches} | Foreach {$_.Value})
$wantedData3 = ($html | select-string '(?<=<confused id="allTheTime">\s+)(.*?)(?=\s+</confused>)' -allMatches | foreach {$_.Matches} | Foreach {$_.Value})
write-host $wantedData1
write-host $wantedData2
write-host $wantedData3

输出如下：

idk1 idk2 idk3
idc2 idc4 idc2  idc4
abc1 abc2 abc3

我正在尝试写一些东西给我这样的输出：

idk1
idc1
idc2
idc3
idc4
abc1

idk2
idc2
idc4
abc2

idk3
abc3

<cool> 和 <confused> 标记的数据在每次迭代中出现一次，但 <lame> 标记的值可能不存在，或者可能存在 1 到 5 个 <lame> 标记。我提到这一点是因为如果标签为空，我的其他查询之一会中断。任何帮助将不胜感激。谢谢。

Answer 1

看起来您的 HTML 文本也是有效的 XML，这使得解析更容易：

# Simulate reading from an XML file.
# To read from an actual file, use:
#    ($xmlDoc = [xml]::new()).Load((Convert-Path file.xml))
[xml] $xmlDoc = @'
<html>

<cool class="what"> idk1 </cool>
<lame id="hm">idc1 </lame>
<lame id="hm"> idc2 </lame>
<lame id="hm"> idc3</lame>
<lame id="hm"> idc4 </lame>
<confused id="allTheTime"> abc1 </confused>

<cool class="what"> idk2 </cool>
<lame id="hm"> </lame>
<lame id="hm"> idc2 </lame>
<lame id="hm">  </lame>
<lame id="hm"> idc4 </lame>
<confused id="allTheTime"> abc2 </confused>

<cool class="what"> idk3 </cool>
<confused id="allTheTime"> abc3 </confused>

</html>
'@

# Get the inner text from all <html> child nodes and
# trim surrounding whitespace from each.
$xml.html.ChildNodes.InnerText.Trim()

以上产生以下内容（与您在问题中陈述的内容不完全匹配，但我认为您的意思是）；您可以通过在 $strings = 语句之前添加类似 $strings = 的内容将其捕获到字符串数组中：

idk1
idc1
idc2
idc3
idc4
abc1
idk2

idc2

idc4
abc2
idk3
abc3