如果可以运行包含选项的命令，如何使用Powershell进行验证？

Question

跟进this question。

执行

if ( get-command java -erroraction silentlycontinue ) {
  "Command was found"
}
else {
  "Command was not found"
}

运行

时，

会产生Command was found

if ( get-command "java -version" -erroraction silentlycontinue ) {
  "Command was found"
}
else {
  "Command was not found"
}

返回Command was not found。

Answer 1

Get-Command查找命令（即可执行程序，cmdlet，函数，这些东西的别名等），而不是构成要执行的有效命令行的事物。如果你想要，你只需要尝试执行它：

try {
  $javaVersion = java -version
  Write-Host Java found with version $javaVersion
} catch {
  Write-Host Command was not found
}

当然，应该注意，无论你在那里尝试执行什么都不会做任何你可能会后悔的事情。