在CSV文件中分割一个字符串

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3列。 Date，Time和Name。如下所示

"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"

如何完成有点失落。我试过用逗号代替第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

任何帮助？

Answer 1

我会使用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

<强>正则表达式：

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

<强>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"

修改

由于您使用的是PowerShell 2，因此无法在哈希表上使用PsCustomObject强制转换，因此请改用：

$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