是否有一种绕过32位Java版本的方法（也许是在VBA中启动过程以调用64位版本cmd，关闭UAC或其他tweek的另一种方式），由以下VBA代码强制执行（这只是一个假设，我在下面解释调试过程）：
handleDbl = Shell("javaw -cp theJar.jar com.java.SampleClass", vbNormalFocus)
这里的要点是我想共享我的宏，避免在接收者身上放置额外的指令，所以我试图对代码做所有事情（我在VBA代码上使用后期绑定，以避免手动设置“引用”，种东西）。
抛出了一个错误，所以我改用以下行：
handleDbl = Shell("cmd /k java -cp theJar.jar com.java.SampleClass", vbNormalFocus)
并收到错误Exception in thread "main" java.lang.UnsupportedClassVersionError: Unsupported major.minor version，所以我检查了java -version并试图找出运行哪个Java：
C:\>where java
C:\Windows\System32\java.exe
C:\Program Files\Java\_anyJava.x.x.x_\bin\java.exe
我去了System32文件夹，那里没有Java，但是我知道redirection从那里发生到C:\Windows\SysWOW64，所以我将先前提取的Java版本与C:\Windows\SysWOW64\java.exe -version进行了比较。他们匹配了。
之后，我检查了我的Outlook版本，结果发现它是32位安装。这只是一个提示，但主要是任务管理器中cmd.exe旁边的那个大<strong> * 32 。我不知道64位Outlook是否会有所作为，还是因为VBA实现而会有所不同，但这就是我得出的结论，即VBA的Shell函数引起32位Java调用。
答案 0 :(得分：1)
通常会设置一个JAVA_HOME环境变量。如果是这样，那么您可以执行以下操作：
Dim JavaExe As String
JavaExe = """" & Environ("JAVA_HOME") & "\bin\java.exe"""
handleDbl = Shell("cmd /k " & JavaExe & " -cp theJar.jar com.java.SampleClass", vbNormalFocus)
如果未设置，则必须在编译命令之前通过一些搜索找到它。
答案 1 :(得分：0)
Sam的答案很好，但我只是对用户进行更多设置感到不安，因此我编写了一些函数来检查Java的版本，并在不存在的情况下通知用户（必须在其中安装Java）大小写），这是我的代码。它可能包含一些有用的东西。
Private Function IsJavaAvailable(ByVal displayMessage As Boolean, Optional ByVal isJavaMandatory As Boolean) As Boolean
Dim availability As Boolean
Dim minJavaVersion As Integer
minJavaVersion = 8
'isJavaSetup is a global variable
If (Not isJavaSetup) Then
javawPathQuoted = GetMinimumJavaVersion(minJavaVersion)
If StrComp(javawPathQuoted, "") <> 0 Then
isJavaSetup = True
End If
SetGlobalVars
End If
If javawPathQuoted = Empty Then
availability = False
Else
availability = True
End If
If (displayMessage) Then
If (isJavaMandatory) Then
If Not availability Then
MsgBox "This functionality is NOT available without Java " & minJavaVersion & "." & _
vbNewLine & vbNewLine & _
"Please install Java " & minJavaVersion & " or higher.", vbCritical, _
"Mimimum Version Required: Java " & minJavaVersion
End If
Else
If Not availability Then
MsgBox "Some features of this functionality were disabled." & _
vbNewLine & vbNewLine & _
"Please install Java " & minJavaVersion & " or higher.", vbExclamation, _
"Mimimum Version Required: Java " & minJavaVersion
End If
End If
End If
IsJavaAvailable = availability
End Function
Private Function GetMinimumJavaVersion(ByVal javaMinimumMajorVersionInt As Integer) As String
'Run a shell command, returning the output as a string
Dim commandStr As String
Dim javawPathVar As Variant
Dim javaPathStr As Variant
Dim javaVersionStr As String
Dim javaMajorVersionInt As Integer
Dim detectedJavaPaths As Collection
Dim javaVersionElements As Collection
Dim javaVersionOutput As Collection
Dim detectedJavaVersions As Collection
Dim suitableJavawPath As String
'Check available javaw executables in the SO
commandStr = "where javaw"
Set detectedJavaPaths = GetCommandOutput(commandStr)
Set detectedJavaVersions = New Collection
For Each javawPathVar In detectedJavaPaths
'Look for java.exe instead of javaw.exe by substituting it in path
' javaw.exe does NOT return version output like java.exe
javaPathStr = StrReverse(Replace(StrReverse(javawPathVar), StrReverse("javaw.exe"), StrReverse("java.exe"), , 1))
commandStr = """" & javaPathStr & """" & " -version"
Set javaVersionOutput = GetCommandOutput(commandStr)
javaVersionStr = javaVersionOutput.item(1)
Debug.Print "Getting java version: ", commandStr
Debug.Print "Version detected: "; javaVersionStr
Set javaVersionElements = SplitOnDelimiter(javaVersionStr, " ")
'Check that output is not an error or something else
'java version "1.8.0_75"
If javaVersionElements.Count > 2 Then
If StrComp(javaVersionElements.item(1), "java", vbTextCompare) = 0 Then
If StrComp(javaVersionElements.item(2), "version", vbTextCompare) = 0 Then
detectedJavaVersions.Add javaVersionStr
'Remove quotes from "1.8.0_75", split on '.', get 2nd item (java major version) and cast it to Integer
javaMajorVersionInt = CInt(SplitOnDelimiter(SplitOnDelimiter(javaVersionElements.item(3), """").item(1), ".").item(2))
'JAR will only run in Java 8 or later
If (javaMajorVersionInt >= javaMinimumMajorVersionInt) Then
'Validate that "javaw.exe" exists since the validation was made with "java.exe"
Debug.Print "Verifying if javaw.exe exists: ", javawPathVar
If Len(Dir(javawPathVar)) > 0 Then
suitableJavawPath = javawPathVar
Debug.Print "A suitable javaw.exe version found: ", suitableJavawPath
Exit For
End If
End If
End If
End If
End If
Next javawPathVar
GetMinimumJavaVersion = suitableJavawPath
End Function
Private Function GetCommandOutput(ByRef commandStr As String) As Collection
'Run a shell command, returning the output as a string
Dim shellObj As Object
Set shellObj = CreateObject("WScript.Shell")
'run command
Dim wshScriptExecObj As Object
Dim stdOutObj As Object
Dim stdErrObj As Object
Set wshScriptExecObj = shellObj.Exec(commandStr)
Set stdOutObj = wshScriptExecObj.StdOut
Set stdErrObj = wshScriptExecObj.StdErr
'handle the results as they are written to and read from the StdOut object
Dim fullOutputCollection As Collection
Set fullOutputCollection = New Collection
Dim lineStr As String
While Not stdOutObj.AtEndOfStream
lineStr = stdOutObj.ReadLine
If lineStr <> "" Then
fullOutputCollection.Add lineStr
End If
Wend
If fullOutputCollection.Count = 0 Then
While Not stdErrObj.AtEndOfStream
lineStr = stdErrObj.ReadLine
If lineStr <> "" Then
fullOutputCollection.Add lineStr
End If
Wend
End If
Set GetCommandOutput = fullOutputCollection
End Function