Powershell 密码的字符串操作

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我正在尝试创建用户开始日期的默认密码基础。例如，如果用户从“2018年10月11日”开始，则密码应为 “2018年9月10日！”

这就是我所拥有的。它“有效”，但我相信应该有更好的方法来做到这一点。我只是不知道怎么做。以防万一，这不是什么大问题。更多的是为了学习。我想在PowerShell做得更好

#   Generate Default Password
IF ($StartDate[0] -eq "0" -and $StartDate[1] -eq "1") {
    $Month = "Jan"
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "1") {$Day = "1st"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "2") {$Day = "2nd"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "3") {$Day = "3rd"} 
    Else {$Day = @($StartDate[3] + $StartDate[4] + "th")}
    $Year = @("20" + $StartDate[8] + $StartDate[9] + "!")
}
IF ($StartDate[0] -eq "0" -and $StartDate[1] -eq "2") {
    $Month = "Feb"
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "1") {$Day = "1st"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "2") {$Day = "2nd"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "3") {$Day = "3rd"} 
    Else {$Day = @($StartDate[3] + $StartDate[4] + "th")}
    $Year = @("20" + $StartDate[8] + $StartDate[9] + "!")
}    
IF ($StartDate[0] -eq "0" -and $StartDate[1] -eq "3") {
    $Month = "Mar"
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "1") {$Day = "1st"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "2") {$Day = "2nd"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "3") {$Day = "3rd"} 
    Else {$Day = @($StartDate[3] + $StartDate[4] + "th")}
    $Year = @("20" + $StartDate[8] + $StartDate[9] + "!")
}    
IF ($StartDate[0] -eq "0" -and $StartDate[1] -eq "4") {
    $Month = "Apr"
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "1") {$Day = "1st"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "2") {$Day = "2nd"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "3") {$Day = "3rd"} 
    Else {$Day = @($StartDate[3] + $StartDate[4] + "th")}
    $Year = @("20" + $StartDate[8] + $StartDate[9] + "!")
}    
IF ($StartDate[0] -eq "0" -and $StartDate[1] -eq "5") {
    $Month = "May"
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "1") {$Day = "1st"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "2") {$Day = "2nd"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "3") {$Day = "3rd"} 
    Else {$Day = @($StartDate[3] + $StartDate[4] + "th")}
    $Year = @("20" + $StartDate[8] + $StartDate[9] + "!")
}    
IF ($StartDate[0] -eq "0" -and $StartDate[1] -eq "6") {
    $Month = "Jun"
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "1") {$Day = "1st"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "2") {$Day = "2nd"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "3") {$Day = "3rd"} 
    Else {$Day = @($StartDate[3] + $StartDate[4] + "th")}
    $Year = @("20" + $StartDate[8] + $StartDate[9] + "!")
}    
IF ($StartDate[0] -eq "0" -and $StartDate[1] -eq "7") {
    $Month = "Jul"
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "1") {$Day = "1st"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "2") {$Day = "2nd"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "3") {$Day = "3rd"} 
    Else {$Day = @($StartDate[3] + $StartDate[4] + "th")}
    $Year = @("20" + $StartDate[8] + $StartDate[9] + "!")
}    
IF ($StartDate[0] -eq "0" -and $StartDate[1] -eq "8") {
    $Month = "Aug"
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "1") {$Day = "1st"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "2") {$Day = "2nd"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "3") {$Day = "3rd"} 
    Else {$Day = @($StartDate[3] + $StartDate[4] + "th")}
    $Year = @("20" + $StartDate[8] + $StartDate[9] + "!")
}    
IF ($StartDate[0] -eq "0" -and $StartDate[1] -eq "9") {
    $Month = "Sep"
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "1") {$Day = "1st"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "2") {$Day = "2nd"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "3") {$Day = "3rd"} 
    Else {$Day = @($StartDate[3] + $StartDate[4] + "th")}
    $Year = @("20" + $StartDate[8] + $StartDate[9] + "!")
}    
IF ($StartDate[0] -eq "1" -and $StartDate[1] -eq "0") {
    $Month = "Oct"
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "1") {$Day = "1st"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "2") {$Day = "2nd"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "3") {$Day = "3rd"} 
    Else {$Day = @($StartDate[3] + $StartDate[4] + "th")}
    $Year = @("20" + $StartDate[8] + $StartDate[9] + "!")
}    
IF ($StartDate[0] -eq "1" -and $StartDate[1] -eq "1") {
    $Month = "Nov"
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "1") {$Day = "1st"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "2") {$Day = "2nd"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "3") {$Day = "3rd"} 
    Else {$Day = @($StartDate[3] + $StartDate[4] + "th")}
    $Year = @("20" + $StartDate[8] + $StartDate[9] + "!")
}   
IF ($StartDate[0] -eq "1" -and $StartDate[1] -eq "2") {
    $Month = "Dec"
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "1") {$Day = "1st"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "2") {$Day = "2nd"}
    IF ($StartDate[3] -eq "0" -eq $StartDate[4] -eq "3") {$Day = "3rd"} 
    Else {$Day = @($StartDate[3] + $StartDate[4] + "th")}
    $Year = @("20" + $StartDate[8] + $StartDate[9] + "!")
}

[string]$password2 = @($Month + $Day + $Year)
$password = $password2 | ConvertTo-SecureString -AsPlainText -Force
$password 

重新调整优雅的C#解决方案的用途，您可以在PowerShell中这样做：

    function Get-DaySuffix($day)
    {
        switch ($day)
        {
            {$day -in (1,21,31)} {"st" }
            {$day -in (2,22)} { "nd" }
            {$day -in (3,23)} { "rd" }
            default { "th" }
        }
    }

    # Change to some other means of getting date - e.g. Read-Host
    $startDate = Get-Date "23/05/2007"

    # Get a collection of the month names (e.g. Jan, Feb, mar, etc)
    $months = [System.Globalization.CultureInfo]::CurrentCulture.DateTimeFormat.AbbreviatedMonthNames

    # Build the password from the date parts
    $password = "$($months[$startDate.Month-1])$($startDate.Day)$(Get-DaySuffix $startDate.Day)$($startDate.Year)!"

在这种情况下，

$password

设置为2007年5月23日

重新利用优雅的C#解决方案，您可以在PowerShell中这样做：

    function Get-DaySuffix($day)
    {
        switch ($day)
        {
            {$day -in (1,21,31)} {"st" }
            {$day -in (2,22)} { "nd" }
            {$day -in (3,23)} { "rd" }
            default { "th" }
        }
    }

    # Change to some other means of getting date - e.g. Read-Host
    $startDate = Get-Date "23/05/2007"

    # Get a collection of the month names (e.g. Jan, Feb, mar, etc)
    $months = [System.Globalization.CultureInfo]::CurrentCulture.DateTimeFormat.AbbreviatedMonthNames

    # Build the password from the date parts
    $password = "$($months[$startDate.Month-1])$($startDate.Day)$(Get-DaySuffix $startDate.Day)$($startDate.Year)!"

在这种情况下，

$password

设置为2007年5月23日

免责声明：您可能已经知道了，但我必须声明这是一个非常糟糕的密码，如果您可以这样称呼它的话

---

其中大部分都可以卸载到，除了月日的序号后缀

我将其分为三个步骤：

解析输入日期

生成上半部分

计算后缀

追加年份

---

免责声明：您可能已经知道了，但我必须声明这是一个非常糟糕的密码，如果您可以这样称呼它的话

---

其中大部分都可以卸载到，除了月日的序号后缀

我将其分为三个步骤：

解析输入日期

生成上半部分

计算后缀

追加年份

---

---

使用正则表达式获取日期后缀并生成密码：

function Get-DateSuffix([datetime]$Date) {
    switch -regex ($Date.Day.ToString()) {
        '1(1|2|3)$' { 'th'; break }
        '.?1$'      { 'st'}
        '.?2$'      { 'nd'}
        '.?3$'      { 'rd'}
        default     { 'th'}
    }
}

[datetime]$StartDate = "11/10/2018"

$password = "{0:MMM}{1}{2}{3}!" -f $StartDate, $StartDate.Day, (Get-DateSuffix $StartDate), $StartDate.Year

---

使用正则表达式获取日期后缀并生成密码：

function Get-DateSuffix([datetime]$Date) {
    switch -regex ($Date.Day.ToString()) {
        '1(1|2|3)$' { 'th'; break }
        '.?1$'      { 'st'}
        '.?2$'      { 'nd'}
        '.?3$'      { 'rd'}
        default     { 'th'}
    }
}

[datetime]$StartDate = "11/10/2018"

$password = "{0:MMM}{1}{2}{3}!" -f $StartDate, $StartDate.Day, (Get-DateSuffix $StartDate), $StartDate.Year

---

您从何处获得

$StartDate

-广告用户财产或其他地方？了解这一点可能有助于识别一个更优雅的解决方案，我手动将其放入变量中，如$StartDate=读取主机“StartDate？”您从哪里获得

$StartDate

来自广告用户属性或其他地方？了解这一点可能有助于识别一个更优雅的解决方案，我手动将其放入变量中，如$StartDate=读取主机“StartDate”？

'1（1 | 2 | 3）$'{'th}

是否应该中断以避免数组？是否应该

'1（1 | 2 | 3）$'{'th}

中断以避免数组？