Question

我有一个正则表达式，当我使用各种在线正则表达式测试网站时返回正确的结果。但是，当我在PowerShell脚本中使用正则表达式时，它只返回一行而不是多行。我希望这里的PowerShell专家可以告诉我我做错了什么。我使用的是PowerShell v1。

这是我的正则表达式： https://regex101.com/r/eA5jB2/3

这是我的powershell脚本： -

#Read the file 
$FilePath = "testfile.txt" 

$regex = '(?msi)^0[12][VM](?:[^\n]|\n(?!0[12][VM]|50|90))+'
get-content $FilePath | select-string -pattern $regex

返回是一行

01Mxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx  01 01 01

而不是

01Mxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 01 01 01
01=0xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
01=5xxxxxxxxxxxxxxxxxxxxxxxxxxx

Answer 1

问题出在Get-Content cmdlet中，因为它返回一个行数组，因此您无法匹配文本除以换行符。

尝试使用其他方法获取文件内容：

[IO.File]::ReadAllText($FilePath)
Get-Content $FilePath -Raw
Get-Content $FilePath | Out-String

您可以找到类似的问题here。

Answer 2

我认为问题在于使用Select-String。

$text = 
@'
00 date
01Mxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
01 01 01 01=0xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
01=5xxxxxxxxxxxxxxxxxxxxxxxxxxx
01Mxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
01 01 01 01=0xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
01=9xxxxxxxxxxxxxxxxxxxxxxxxxxx
50 xxxxxxxxxxxxx xxxxxxxxxxxxxxxxx
01Vxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
01$1 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
01$A xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
01$B 0xxxxxxxxxxxxxxxxxxxx
01$0xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
01$5xxxxxxxxxxxxxxxxxxxxxxxxxxx
50 xxxxxxxxxxxx BatchTotal
90 xxxxxxxxxxxx FILETotal
'@ 

$regex = '(?msi)^0[12][VM](?:[^\n]|\n(?!0[12][VM]|50|90))+'


[regex]::matches($text,$regex) |
 foreach {$_.groups[0].value;'***'}

01Mxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
01 01 01 01=0xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
01=5xxxxxxxxxxxxxxxxxxxxxxxxxxx
***
01Mxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
01 01 01 01=0xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
01=9xxxxxxxxxxxxxxxxxxxxxxxxxxx
***
01Vxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
01$1 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
01$A xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
01$B 0xxxxxxxxxxxxxxxxxxxx
01$0xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
01$5xxxxxxxxxxxxxxxxxxxxxxxxxxx
***

Powershell正则表达式拒绝在多行上运行

2 个答案: