Question

如何使用命令设置和查看windows的环境变量

Answer 1

使用命令设置和查看windows的环境变量的步骤：
打开Dos命令行，

1、查看JAVA_HOME环境变量
echo %JAVA_HOME%
2、设置DOWNLOAD_DIR环境变量并查看
set DOWNLOAD_DIR=c:\download
echo %DOWNLOAD_DIR%

Answer 2

保存名字为：设置环境变量.vbs，复制以下代码即可：
------------------------------------------------------------
Set pSysEnv = CreateObject("WScript.Shell").Environment("System")

'Check whether a character string matches a regular expression
' ^\w+[@]\w+[.]\w+$ E-MailAddress
' ^[0-9-]+$ Numeral
Function IsMatch(Str, Patrn)
Set r = new RegExp
r.Pattern = Patrn
IsMatch = r.test(Str)
End Function

Sub SetEnv(pPath, pValue)
Dim ExistValueOfPath
IF pValue <> "" Then
ExistValueOfPath = pSysEnv(pPath)
IF Right(pValue, 1) = "\" Then pValue = Left(pValue, Len(pValue)-1)
If IsMatch(ExistValueOfPath, "\*?" & Replace(pValue, "\", "\\") & "\\?(\b|;)") Then Exit Sub '已经存在该环境变量设置
If ExistValueOfPath <> "" Then pValue = ";" & pValue
pSysEnv(pPath) = ExistValueOfPath & pValue
Else
pSysEnv.Remove(pPath)
End IF
End Sub