我使用这个Powershell脚本添加到PATH变量中。 只要稍加调整，我相信它也适用于你的情况。

#REQUIRES -Version 3.0

if (-not ("win32.nativemethods" -as [type])) {
    # import sendmessagetimeout from win32
    add-type -Namespace Win32 -Name NativeMethods -MemberDefinition @"
[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
public static extern IntPtr SendMessageTimeout(
   IntPtr hWnd, uint Msg, UIntPtr wParam, string lParam,
   uint fuFlags, uint uTimeout, out UIntPtr lpdwResult);
"@
}

$HWND_BROADCAST = [intptr]0xffff;
$WM_SETTINGCHANGE = 0x1a;
$result = [uintptr]::zero

function global:ADD-PATH
{
    [Cmdletbinding()]
    param ( 
        [parameter(Mandatory=$True, ValueFromPipeline=$True, Position=0)] 
        [string] $Folder
    )

    # See if a folder variable has been supplied.
    if (!$Folder -or $Folder -eq "" -or $Folder -eq $null) { 
        throw 'No Folder Supplied. $ENV:PATH Unchanged'
    }

    # Get the current search path from the environment keys in the registry.
    $oldPath=$(Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Environment' -Name PATH).Path

    # See if the new Folder is already in the path.
    if ($oldPath | Select-String -SimpleMatch $Folder){ 
        return 'Folder already within $ENV:PATH' 
    }

    # Set the New Path and add the ; in front
    $newPath=$oldPath+';'+$Folder
    Set-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Environment' -Name PATH -Value $newPath -ErrorAction Stop

    # Show our results back to the world
    return 'This is the new PATH content: '+$newPath

    # notify all windows of environment block change
    [win32.nativemethods]::SendMessageTimeout($HWND_BROADCAST, $WM_SETTINGCHANGE, [uintptr]::Zero, "Environment", 2, 5000, [ref]$result)
}

function global:REMOVE-PATH {
    [Cmdletbinding()]
    param ( 
        [parameter(Mandatory=$True, ValueFromPipeline=$True, Position=0)]
        [String] $Folder
    )

    # See if a folder variable has been supplied.
    if (!$Folder -or $Folder -eq "" -or $Folder -eq $NULL) { 
        throw 'No Folder Supplied. $ENV:PATH Unchanged'
    }

    # add a leading ";" if missing
    if ($Folder[0] -ne ";") {
        $Folder = ";" + $Folder;
    }

    # Get the Current Search Path from the environment keys in the registry
    $newPath=$(Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Environment' -Name PATH).Path

    # Find the value to remove, replace it with $NULL. If it's not found, nothing will change and you get a message.
    if ($newPath -match [regex]::Escape($Folder)) { 
        $newPath=$newPath -replace [regex]::Escape($Folder),$NULL 
    } else { 
        return "The folder you mentioned does not exist in the PATH environment" 
    }

    # Update the Environment Path
    Set-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Environment' -Name PATH -Value $newPath -ErrorAction Stop

    # Show what we just did
    return 'This is the new PATH content: '+$newPath

    # notify all windows of environment block change
    [win32.nativemethods]::SendMessageTimeout($HWND_BROADCAST, $WM_SETTINGCHANGE, [uintptr]::Zero, "Environment", 2, 5000, [ref]$result)
}


# Use ADD-PATH or REMOVE-PATH accordingly.

#Anything to Add?

#Anything to Remove?

REMOVE-PATH "%_installpath_bin%"

我只是想说，那些使用Anaconda的人，当你使用chocoley Refreshenv命令时;所有与conda相关的环境变量都将丢失。 要解决这个问题，最好的方法是重新启动CMD。：(

以下是Chocolatey使用的方法。

https://github.com/chocolatey/choco/blob/master/src/chocolatey.resources/redirects/RefreshEnv.cmd

@echo off
::
:: RefreshEnv.cmd
::
:: Batch file to read environment variables from registry and
:: set session variables to these values.
::
:: With this batch file, there should be no need to reload command
:: environment every time you want environment changes to propagate

::echo "RefreshEnv.cmd only works from cmd.exe, please install the Chocolatey Profile to take advantage of refreshenv from PowerShell"
echo | set /p dummy="Refreshing environment variables from registry for cmd.exe. Please wait..."

goto main

:: Set one environment variable from registry key
:SetFromReg
    "%WinDir%\System32\Reg" QUERY "%~1" /v "%~2" > "%TEMP%\_envset.tmp" 2>NUL
    for /f "usebackq skip=2 tokens=2,*" %%A IN ("%TEMP%\_envset.tmp") do (
        echo/set "%~3=%%B"
    )
    goto :EOF

:: Get a list of environment variables from registry
:GetRegEnv
    "%WinDir%\System32\Reg" QUERY "%~1" > "%TEMP%\_envget.tmp"
    for /f "usebackq skip=2" %%A IN ("%TEMP%\_envget.tmp") do (
        if /I not "%%~A"=="Path" (
            call :SetFromReg "%~1" "%%~A" "%%~A"
        )
    )
    goto :EOF

:main
    echo/@echo off >"%TEMP%\_env.cmd"

    :: Slowly generating final file
    call :GetRegEnv "HKLM\System\CurrentControlSet\Control\Session Manager\Environment" >> "%TEMP%\_env.cmd"
    call :GetRegEnv "HKCU\Environment">>"%TEMP%\_env.cmd" >> "%TEMP%\_env.cmd"

    :: Special handling for PATH - mix both User and System
    call :SetFromReg "HKLM\System\CurrentControlSet\Control\Session Manager\Environment" Path Path_HKLM >> "%TEMP%\_env.cmd"
    call :SetFromReg "HKCU\Environment" Path Path_HKCU >> "%TEMP%\_env.cmd"

    :: Caution: do not insert space-chars before >> redirection sign
    echo/set "Path=%%Path_HKLM%%;%%Path_HKCU%%" >> "%TEMP%\_env.cmd"

    :: Cleanup
    del /f /q "%TEMP%\_envset.tmp" 2>nul
    del /f /q "%TEMP%\_envget.tmp" 2>nul

    :: capture user / architecture
    SET "OriginalUserName=%USERNAME%"
    SET "OriginalArchitecture=%PROCESSOR_ARCHITECTURE%"

    :: Set these variables
    call "%TEMP%\_env.cmd"

    :: Cleanup
    del /f /q "%TEMP%\_env.cmd" 2>nul

    :: reset user / architecture
    SET "USERNAME=%OriginalUserName%"
    SET "PROCESSOR_ARCHITECTURE=%OriginalArchitecture%"

    echo | set /p dummy="Finished."
    echo .

我在批处理脚本中使用以下代码:

if not defined MY_ENV_VAR (
    setx MY_ENV_VAR "VALUE" > nul
    set MY_ENV_VAR=VALUE
)
echo %MY_ENV_VAR%

通过在SETX之后使用SET，可以直接使用“本地”变量，而无需重新启动命令窗口。在下次运行时，将使用环境变量。

编辑:只有当您所做的环境更改是运行批处理文件的结果时，这才有效。

如果批处理文件以SETLOCAL开始，那么即使您在批处理退出前忘记调用ENDLOCAL，或者它意外中止，它也总是会在退出时解开回到原始环境。

几乎我编写的每个批处理文件都是从SETLOCAL开始的，因为在大多数情况下，我不希望环境更改的副作用仍然存在。在某些情况下，我确实希望某些环境变量的变化传播到批处理文件之外，那么我的最后一个ENDLOCAL看起来像这样:

ENDLOCAL & (
  SET RESULT1=%RESULT1%
  SET RESULT2=%RESULT2%
)

如果它只涉及一个(或几个)特定的变量，你想要改变，我认为最简单的方法是一个变通方法:在你的环境和当前的控制台会话中设置

Set将把变量放在当前会话中 SetX将把变量放在环境中，但不是在当前会话中

我使用这个简单的批处理脚本将Maven从Java7更改为Java8(两者都是env。批处理文件夹在我的PATH变量中，所以我总是可以调用'j8'，在我的控制台和环境中，我的JAVA_HOME变量被改变:

j8.bat:

@echo off
set JAVA_HOME=%JAVA_HOME_8%
setx JAVA_HOME "%JAVA_HOME_8%"

到目前为止，我发现这是最好的和最简单的工作。 你可能希望这是在一个命令中，但它只是没有在Windows…