在 CSV 文件中分割字符串

Question

我在 CSV 文件中有以下数据

"Name","SourceIP","DestinationIP"
"Sep  1 03:55:57 mmt-5","172.16.48.158","22.22.22.22"
"Sep  1 03:55:57 mmt-5","172.16.48.158","22.22.22.22"
"Sep  1 03:55:57 mmt-5","172.16.48.158","22.22.22.22"
"Sep  1 03:55:57 mmt-5","172.16.48.158","22.22.22.22"

我需要将Name 列拆分为另外 3 列。 Date、Time 和 Name。像下面这样

"Date","Time","Name","SourceIP","DestinationIP"
"Sep  1","03:55:57","mmt-5","172.16.48.158","22.22.22.22"
"Sep  1","03:55:57","mmt-5","172.16.48.158","22.22.22.22"
"Sep  1","03:55:57","mmt-5","172.16.48.158","22.22.22.22"
"Sep  1","03:55:57","mmt-5","172.16.48.158","22.22.22.22"

对如何完成有点迷茫。我试过用逗号替换第 14 个字符，但没有运气。

$test = import-csv C-sample.csv

$test | foreach-object {
    $_.Name = $_.Name.Replace(14, ",")
}

$test | export-csv D-sample.csv -notype

有什么帮助吗？

Answer 1

我将使用regex 解析字符串并创建一个新的PSCustomObject 以将其导出：

$test = import-csv C-sample.csv
$regex = '(?<Date>\w+\s+\d{1,2})\s+(?<Time>\d{2}:\d{2}:\d{2})\s+(?<Name>.*)'

$test | foreach-object {
    $regMatch = [regex]::Match($_.Name, $regex)
    [PSCustomObject]@{
        Date = $regMatch.Groups['Date'].Value
        Time = $regMatch.Groups['Time'].Value
        Name = $regMatch.Groups['Name'].Value
        SourceIP = $_.SourceIP
        DestinationIP = $_.DestinationIP
    }
} | export-csv D-sample.csv -notype

---

正则表达式：

(?<Date>\w+\s+\d{1,2})\s+(?<Time>\d{2}:\d{2}:\d{2})\s+(?<Name>.*)

---

输出：

"Date","Time","Name","SourceIP","DestinationIP"
"Sep  1","03:55:57","mmt-5","172.16.48.158","22.22.22.22"
"Sep  1","03:55:57","mmt-5","172.16.48.158","22.22.22.22"
"Sep  1","03:55:57","mmt-5","172.16.48.158","22.22.22.22"
"Sep  1","03:55:57","mmt-5","172.16.48.158","22.22.22.22"

---

编辑：

由于您使用的是 PowerShell 2，因此您不能在哈希表上使用 PsCustomObject 强制转换，因此请改用它：

$test = import-csv C-sample.csv
$regex = '(?<Date>\w+\s+\d{1,2})\s+(?<Time>\d{2}:\d{2}:\d{2})\s+(?<Name>.*)'

$test | foreach-object {
    $regMatch = [regex]::Match($_.Name, $regex)

       $object = New-Object PSObject
       Add-Member -InputObject $object -memberType NoteProperty -Name Date -Value  $regMatch.Groups['Date'].Value
       Add-Member -InputObject $object -memberType NoteProperty -Name Time -Value $regMatch.Groups['Time'].Value
       Add-Member -InputObject $object -memberType NoteProperty -Name Name -Value $regMatch.Groups['Name'].Value
       Add-Member -InputObject $object -memberType NoteProperty -Name SourceIP -Value $_.SourceIP
       Add-Member -InputObject $object -memberType NoteProperty -Name DestinationIP -Value $_.DestinationIP
       $object
} | export-csv D-sample.csv -notype