使用Powershell卸載Java 6並重新安裝Java 7

Question

我正在使用以下Powershell腳本。上半場（卸載）完美地運作。後半部分（安裝）只有在允許用戶輸入的情況下才有效。任何人都可以提供協助嗎？下面是腳本：（抱歉格式差）

#uninstall 
$java = Get-WmiObject -Class win32_product | where { $_.Name -like "*Java*"} 
$msiexec = "C:\Windows\system32\msiexec.exe"; 
$msiexecargs = '/x "$($app.IdentifyingNumber)" /qn /norestart' 

if ($java -ne $null) 
{ 
    foreach ($app in $java) 
    { 
     write-host $app.LocalPackage 
     write-host $app.IdentifyingNumber 
     C:\Windows\system32\cmd.exe /c "C:\Windows\system32\msiexec.exe /x $($app.IdentifyingNumber) /qn" 
     Start-Process -FilePath $msiexec -Arg $msiexecargs -Wait -Passthru 
     [Diagnostics.Process]::Start($msiexec, $msiexecargs); 
    } 
} 
if ($java -ne $null) 
{ 
    foreach ($app in $java) 

{ 
     write-host $app.LocalPackage 
     write-host $app.IdentifyingNumber 

C:\Windows\system32\cmd.exe /c 

"C:\Windows\system32\msiexec.exe /x $($app.IdentifyingNumber) /qn" 

     Start-Process -FilePath $msiexec -Arg $msiexecargs -Wait -Passthru 
     [Diagnostics.Process]::Start($msiexec, $msiexecargs); 
    } 
} 

function Get-ScriptDirectory{ 
    $Invocation = (Get-Variable MyInvocation -Scope 1).Value 

try { 
     Split-Path $Invocation.MyCommand.Path -ea 0 
    } 

catch { 
    Write-Warning 'You need to call this function from within a saved script.' 
    } 
} 

function Get-Architecture{ 
    return $(gwmi win32_operatingsystem).OSArchitecture 
} 


$Path = Get-ScriptDirectory 

#Close all instances of IE, Firefox, & Chrome 
Get-Process | where {$_.ProcessName -match "iexplore"} | Stop-Process -Force 
Get-Process | where {$_.ProcessName -match "chrome"} | Stop-Process -Force 
Get-Process | where {$_.ProcessName -match "firefox"} | Stop-Process -Force 

#Install 
Start-Process -FilePath "msiexec.exe" -ArgumentList "/i "C:\temp\jre1.7.0_17.msi" ""/log "c:\temp\javainst.log " -Credential $cred -wait 

#Also Install the 64-bit JRE if on a 64 workstation 

if(Get-Architecture -match "64") 
{ 
    $cred = Get-Credential 
    Start-Process -FilePath "msiexec.exe" -ArgumentList "/i "C:\temp\jre1.7.0_17 (x64).msi" ""/log c:\temp\javainst.log " -Credential $cred -wait 
} 

#Import reg keys to disable auto updating 
reg import "C:\temp\JavaUpdate.reg"{ 
    } 

Answer 1

#uninstall everything Java 
Get-WmiObject -Class win32_product | ? {$_.Name -like "*Java*"} | % {msiexec /x "$($_.IdentifyingNumber)" /qn | Out-Null} 
#The Out-Null waits for the command to finish 

#If you have made a Java MSI use this 
msiexec /i $pathtomsi /qn 

#If you only have the exe you'll need to look up the Command Line Interface (CLI) for Java 
$cmd = "$pathtoexe /s" 
cmd /c $cmd 

至於你的腳本改變#Install行：

Start-Process -FilePath 'msiexec.exe' -ArgumentList '/i "C:\temp\jre1.7.0_17.msi" /log "c:\temp\javainst.log" /qn' -Credential $cred -wait 

Best Practice use mostly single quotes