我把部分代码粘贴如下。这段代码是解析从 HTTP 请求中得到的一个 JSON 字符串，根本没有工作表/工作簿操作。 office升级到office365 ProPlus之前，效率还是挺高的。但是升级后，一个不到2秒就可以解析的json，要花几分钟。我个人不明白根本原因。
代码来源:@Tim Hall https://github.com/VBA-tools/VBA-JSON/blob/master/JsonConverter.bas
' ============================================= '
' Public Methods
' ============================================= '
''
' Convert JSON string to object (Dictionary/Collection)
'
' @method ParseJson
' @param {String} json_String
' @return {Object} (Dictionary or Collection)
' @throws 10001 - JSON parse error
''
Public Function ParseJson(ByVal json_String As String) As Object
Dim json_Index As Long
json_Index = 1
' Remove vbCr, vbLf, and vbTab from json_String
json_String = VBA.Replace(VBA.Replace(VBA.Replace(json_String, VBA.vbCr, ""), VBA.vbLf, ""), VBA.vbTab, "")
json_SkipSpaces json_String, json_Index
Select Case VBA.Mid$(json_String, json_Index, 1)
Case "{"
Set ParseJson = json_ParseObject(json_String, json_Index)
Case "["
Set ParseJson = json_ParseArray(json_String, json_Index)
Case Else
' Error: Invalid JSON string
Err.Raise 10001, "JSONConverter", json_ParseErrorMessage(json_String, json_Index, "Expecting '{' or '['")
End Select
End Function
Private Function json_ParseObject(json_String As String, ByRef json_Index As Long) As Dictionary
Dim json_Key As String
Dim json_NextChar As String
Set json_ParseObject = New Dictionary
json_SkipSpaces json_String, json_Index
If VBA.Mid$(json_String, json_Index, 1) <> "{" Then
Err.Raise 10001, "JSONConverter", json_ParseErrorMessage(json_String, json_Index, "Expecting '{'")
Else
json_Index = json_Index + 1
Do
json_SkipSpaces json_String, json_Index
If VBA.Mid$(json_String, json_Index, 1) = "}" Then
json_Index = json_Index + 1
Exit Function
ElseIf VBA.Mid$(json_String, json_Index, 1) = "," Then
json_Index = json_Index + 1
json_SkipSpaces json_String, json_Index
End If
json_Key = json_ParseKey(json_String, json_Index)
json_NextChar = json_Peek(json_String, json_Index)
Debug.Print "json_Key = " & json_Key & ", json_NextChar = " & json_NextChar
If json_NextChar = "[" Or json_NextChar = "{" Then
Set json_ParseObject.Item(json_Key) = json_ParseValue(json_String, json_Index)
Else
json_ParseObject.Item(json_Key) = json_ParseValue(json_String, json_Index)
End If
DoEvents
Loop
End If
End Function
Private Function json_ParseArray(json_String As String, ByRef json_Index As Long) As Collection
Set json_ParseArray = New Collection
json_SkipSpaces json_String, json_Index
If VBA.Mid$(json_String, json_Index, 1) <> "[" Then
Err.Raise 10001, "JSONConverter", json_ParseErrorMessage(json_String, json_Index, "Expecting '['")
Else
json_Index = json_Index + 1
Do
json_SkipSpaces json_String, json_Index
If VBA.Mid$(json_String, json_Index, 1) = "]" Then
json_Index = json_Index + 1
Exit Function
ElseIf VBA.Mid$(json_String, json_Index, 1) = "," Then
json_Index = json_Index + 1
json_SkipSpaces json_String, json_Index
End If
json_ParseArray.add json_ParseValue(json_String, json_Index)
'DoEvents
Loop
End If
End Function
Private Function json_ParseValue(json_String As String, ByRef json_Index As Long) As Variant
json_SkipSpaces json_String, json_Index
Select Case VBA.Mid$(json_String, json_Index, 1)
Case "{"
Set json_ParseValue = json_ParseObject(json_String, json_Index)
Case "["
Set json_ParseValue = json_ParseArray(json_String, json_Index)
Case """", "'"
json_ParseValue = json_ParseString(json_String, json_Index)
Case Else
If VBA.Mid$(json_String, json_Index, 4) = "true" Then
json_ParseValue = True
json_Index = json_Index + 4
ElseIf VBA.Mid$(json_String, json_Index, 5) = "false" Then
json_ParseValue = False
json_Index = json_Index + 5
ElseIf VBA.Mid$(json_String, json_Index, 4) = "null" Then
json_ParseValue = Null
json_Index = json_Index + 4
ElseIf VBA.InStr("+-0123456789", VBA.Mid$(json_String, json_Index, 1)) Then
json_ParseValue = json_ParseNumber(json_String, json_Index)
Else
Err.Raise 10001, "JSONConverter", json_ParseErrorMessage(json_String, json_Index, "Expecting 'STRING', 'NUMBER', null, true, false, '{', or '['")
End If
End Select
End Function
Private Function json_ParseString(json_String As String, ByRef json_Index As Long) As String
Dim json_Quote As String
Dim json_Char As String
Dim json_Code As String
Dim json_buffer As String
Dim json_BufferPosition As Long
Dim json_BufferLength As Long
json_SkipSpaces json_String, json_Index
' Store opening quote to look for matching closing quote
json_Quote = VBA.Mid$(json_String, json_Index, 1)
json_Index = json_Index + 1
Do While json_Index > 0 And json_Index <= Len(json_String)
json_Char = VBA.Mid$(json_String, json_Index, 1)
Select Case json_Char
Case "\"
' Escaped string, \\, or \/
json_Index = json_Index + 1
json_Char = VBA.Mid$(json_String, json_Index, 1)
Select Case json_Char
Case """", "\", "/", "'"
json_BufferAppend json_buffer, json_Char, json_BufferPosition, json_BufferLength
json_Index = json_Index + 1
Case "b"
json_BufferAppend json_buffer, vbBack, json_BufferPosition, json_BufferLength
json_Index = json_Index + 1
Case "f"
json_BufferAppend json_buffer, vbFormFeed, json_BufferPosition, json_BufferLength
json_Index = json_Index + 1
Case "n"
json_BufferAppend json_buffer, vbCrLf, json_BufferPosition, json_BufferLength
json_Index = json_Index + 1
Case "r"
json_BufferAppend json_buffer, vbCr, json_BufferPosition, json_BufferLength
json_Index = json_Index + 1
Case "t"
json_BufferAppend json_buffer, vbTab, json_BufferPosition, json_BufferLength
json_Index = json_Index + 1
Case "u"
' Unicode character escape (e.g. \u00a9 = Copyright)
json_Index = json_Index + 1
json_Code = VBA.Mid$(json_String, json_Index, 4)
json_BufferAppend json_buffer, VBA.ChrW(VBA.val("&h" + json_Code)), json_BufferPosition, json_BufferLength
json_Index = json_Index + 4
End Select
Case json_Quote
json_ParseString = json_BufferToString(json_buffer, json_BufferPosition, json_BufferLength)
json_Index = json_Index + 1
Exit Function
Case Else
json_BufferAppend json_buffer, json_Char, json_BufferPosition, json_BufferLength
json_Index = json_Index + 1
End Select
Loop
End Function
Private Function json_ParseNumber(json_String As String, ByRef json_Index As Long) As Variant
Dim json_Char As String
Dim json_Value As String
json_SkipSpaces json_String, json_Index
Do While json_Index > 0 And json_Index <= Len(json_String)
json_Char = VBA.Mid$(json_String, json_Index, 1)
If VBA.InStr("+-0123456789.eE", json_Char) Then
' Unlikely to have massive number, so use simple append rather than buffer here
json_Value = json_Value & json_Char
json_Index = json_Index + 1
Else
' Excel only stores 15 significant digits, so any numbers larger than that are truncated
' This can lead to issues when BIGINT's are used (e.g. for Ids or Credit Cards), as they will be invalid above 15 digits
' See: http://support.microsoft.com/kb/269370
'
' Fix: Parse -> String, Convert -> String longer than 15 characters containing only numbers and decimal points -> Number
If Not JsonOptions.UseDoubleForLargeNumbers And Len(json_Value) >= 16 Then
json_ParseNumber = json_Value
Else
' VBA.Val does not use regional settings, so guard for comma is not needed
json_ParseNumber = VBA.val(json_Value)
End If
Exit Function
End If
Loop
End Function
Private Function json_ParseKey(json_String As String, ByRef json_Index As Long) As String
' Parse key with single or double quotes
If VBA.Mid$(json_String, json_Index, 1) = """" Or VBA.Mid$(json_String, json_Index, 1) = "'" Then
json_ParseKey = json_ParseString(json_String, json_Index)
ElseIf JsonOptions.AllowUnquotedKeys Then
Dim json_Char As String
Do While json_Index > 0 And json_Index <= Len(json_String)
json_Char = VBA.Mid$(json_String, json_Index, 1)
If (json_Char <> " ") And (json_Char <> ":") Then
json_ParseKey = json_ParseKey & json_Char
json_Index = json_Index + 1
Else
Exit Do
End If
Loop
Else
Err.Raise 10001, "JSONConverter", json_ParseErrorMessage(json_String, json_Index, "Expecting '""' or '''")
End If
' Check for colon and skip if present or throw if not present
json_SkipSpaces json_String, json_Index
If VBA.Mid$(json_String, json_Index, 1) <> ":" Then
Err.Raise 10001, "JSONConverter", json_ParseErrorMessage(json_String, json_Index, "Expecting ':'")
Else
json_Index = json_Index + 1
End If
End Function
Private Function json_Encode(ByVal json_Text As Variant) As String
' Reference: http://www.ietf.org/rfc/rfc4627.txt
' Escape: ", \, /, backspace, form feed, line feed, carriage return, tab
Dim json_Index As Long
Dim json_Char As String
Dim json_AscCode As Long
Dim json_buffer As String
Dim json_BufferPosition As Long
Dim json_BufferLength As Long
For json_Index = 1 To VBA.Len(json_Text)
json_Char = VBA.Mid$(json_Text, json_Index, 1)
json_AscCode = VBA.AscW(json_Char)
' When AscW returns a negative number, it returns the twos complement form of that number.
' To convert the twos complement notation into normal binary notation, add 0xFFF to the return result.
' https://support.microsoft.com/en-us/kb/272138
If json_AscCode < 0 Then
json_AscCode = json_AscCode + 65536
End If
' From spec, ", \, and control characters must be escaped (solidus is optional)
Select Case json_AscCode
Case 34
' " -> 34 -> \"
json_Char = "\"""
Case 92
' \ -> 92 -> \\
json_Char = "\\"
Case 47
' / -> 47 -> \/ (optional)
If JsonOptions.EscapeSolidus Then
json_Char = "\/"
End If
Case 8
' backspace -> 8 -> \b
json_Char = "\b"
Case 12
' form feed -> 12 -> \f
json_Char = "\f"
Case 10
' line feed -> 10 -> \n
json_Char = "\n"
Case 13
' carriage return -> 13 -> \r
json_Char = "\r"
Case 9
' tab -> 9 -> \t
json_Char = "\t"
Case 0 To 31, 127 To 65535
' Non-ascii characters -> convert to 4-digit hex
json_Char = "\u" & VBA.Right$("0000" & VBA.Hex$(json_AscCode), 4)
End Select
json_BufferAppend json_buffer, json_Char, json_BufferPosition, json_BufferLength
Next json_Index
json_Encode = json_BufferToString(json_buffer, json_BufferPosition, json_BufferLength)
End Function
Private Function json_Peek(json_String As String, ByVal json_Index As Long, Optional json_NumberOfCharacters As Long = 1) As String
' "Peek" at the next number of characters without incrementing json_Index (ByVal instead of ByRef)
json_SkipSpaces json_String, json_Index
json_Peek = VBA.Mid$(json_String, json_Index, json_NumberOfCharacters)
End Function
Private Sub json_SkipSpaces(json_String As String, ByRef json_Index As Long)
' Increment index to skip over spaces
Do While json_Index > 0 And json_Index <= VBA.Len(json_String) And VBA.Mid$(json_String, json_Index, 1) = " "
json_Index = json_Index + 1
Loop
End Sub
Private Function json_StringIsLargeNumber(json_String As Variant) As Boolean
' Check if the given string is considered a "large number"
' (See json_ParseNumber)
Dim json_Length As Long
Dim json_CharIndex As Long
json_Length = VBA.Len(json_String)
' Length with be at least 16 characters and assume will be less than 100 characters
If json_Length >= 16 And json_Length <= 100 Then
Dim json_CharCode As String
Dim json_Index As Long
json_StringIsLargeNumber = True
For json_CharIndex = 1 To json_Length
json_CharCode = VBA.Asc(VBA.Mid$(json_String, json_CharIndex, 1))
Select Case json_CharCode
' Look for .|0-9|E|e
Case 46, 48 To 57, 69, 101
' Continue through characters
Case Else
json_StringIsLargeNumber = False
Exit Function
End Select
Next json_CharIndex
End If
End Function
最佳答案
我遇到了同样的问题。 JsonConverter 模块的升级对我有帮助。 https://github.com/VBA-tools/VBA-JSON/releases/tag/v2.3.0 .
关于升级到 Office 365 专业增强版后，Excel VBA 运行速度极慢，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/57676288/