VBA批量三张合成一个PDF

可以使用VBA编写一个宏来实现批量三张合成一个PDF的功能。具体实现方法可以参考以下代码：

Sub CombinePDFs()
Dim MyPath As String, MyFile As String, PDFName As String
Dim i As Integer, j As Integer, k As Integer, n As Integer
Dim PDFPath As String, DistillerPath As String
Dim PDF As Acrobat.CAcroPDDoc, NewPDF As Acrobat.CAcroPDDoc
Dim PDFs() As Acrobat.CAcroPDDoc, NewPDFName As String

'设置PDF文件夹路径
MyPath = "C:\PDFs\"
'设置输出PDF文件名
PDFName = "CombinedPDF.pdf"
'设置Acrobat Distiller路径
DistillerPath = "C:\Program Files (x86)\Adobe\Acrobat DC\Acrobat\Acrobat.exe"

'获取PDF文件数量
MyFile = Dir(MyPath & "*.pdf")
Do While MyFile <> ""
n = n + 1
ReDim Preserve PDFs(1 To n)
Set PDFs(n) = CreateObject("AcroExch.PDDoc")
PDFs(n).Open MyPath & MyFile
MyFile = Dir
Loop

'合并PDF文件
Set PDF = CreateObject("AcroExch.PDDoc")
For i = 1 To n Step 3
If i + 2 <= n Then
Set NewPDF = CreateObject("AcroExch.PDDoc")
NewPDF.Create
For j = i To i + 2
For k = 0 To PDFs(j).GetNumPages - 1
NewPDF.InsertPages -1, PDFs(j), k, 1, True
Next k
Next j
PDF.InsertPages -1, NewPDF, 0, NewPDF.GetNumPages, True
NewPDF.Close
Else
For k = 0 To PDFs(i).GetNumPages - 1
PDF.InsertPages -1, PDFs(i), k, 1, True
Next k
End If
Next i

'保存合并后的PDF文件
PDFPath = MyPath & PDFName
PDF.Save 1, PDFPath
PDF.Close

'使用Acrobat Distiller将PDF文件转换为标准格式
Shell DistillerPath & " /n /o " & PDFPath, vbNormalFocus

'释放对象
For i = 1 To n
PDFs(i).Close
Set PDFs(i) = Nothing
Next i
Set PDF = Nothing
End Sub

这个宏可以将指定文件夹下的所有PDF文件按照三张一组的方式合并成一个PDF文件，并使用Acrobat Distiller将其转换为标准格式。你可以根据自己的需求修改MyPath和PDFName变量的值来指定文件夹路径和输出文件名。