记录一次帮策划写的基于VBA的数据转化工具

Posted 2022-07-30 kakashi8841

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由于策划计算的表格结构和程序实际使用的数据表结构不一定一致，因此有时候经常需要做数据转化。把策划自己的表格转成程序需要的格式，然后再导入数据库。这次也是策划有个表，里面有多个字段分别表示多个属性，但是程序考虑到通用，不想一个属性增加一个字段，因此想用一个字段，然后采用JSON格式来表示所有属性。

因此，帮策划写了个VBA实现多个字段合并成JSON的。这个VBA可以通过Ctrl表格来配置：

源表名：策划表的名字

目标表名：程序表的名字

字段映射：程序表的字段名对应策划表的字段名。目前支持字段合并（即把策划表里面的多个字段使用JSON合并成程序表需要的一个字段）。字段映射的行数和程序表的字段数量一样。

Sub 按钮1_Click()



SearchColumn = 1
CTRL_TABLE_NAME = "Ctrl"

TotalRow = CountRow(CTRL_TABLE_NAME)



SOURCE_TABLE = GetValueByKey(CTRL_TABLE_NAME, "源表名", TotalRow, SearchColumn)
TARGET_TABLE = GetValueByKey(CTRL_TABLE_NAME, "目标表名", TotalRow, SearchColumn)

Dim srcFieldsArr() As String
fieldNum = 0
Set dict = CreateObject("Scripting.Dictionary")
'Set dict = CreateObject("Scripting.Dictionary")


' 源表格总行数
SrcTableRowCount = CountRow(SOURCE_TABLE)

For Row = 1 To TotalRow
        If Cells(Row, 1) = "字段映射" Then
            fieldNum = fieldNum + 1
            ReDim Preserve srcFieldsArr(fieldNum)
            
            srcFieldsArr(fieldNum) = Cells(Row, 2)
            
            totalColumn = CountColumn(CTRL_TABLE_NAME, Row)
            Dim arr() As String '存放目标表格列
            ReDim arr(1 To totalColumn - 2)
            For i = 3 To totalColumn
                arr(i - 2) = Cells(Row, i)
            Next
            dict.Add fieldNum, arr
        End If
Next Row



'源表格列名和索引的映射
Set SrcRowNameToIndex = CreateObject("Scripting.Dictionary")

For Column = 1 To CountColumn(SOURCE_TABLE, 1)
    SrcRowNameToIndex.Add Worksheets(SOURCE_TABLE).Cells(1, Column).Value, Column
Next Column



' 处理数据
For Row = 2 To SrcTableRowCount
    For i = 1 To fieldNum
    
        arr = dict(i)
        
        If UBound(arr) = 1 Then
            SrcColumnIndex = SrcRowNameToIndex(arr(1))
            Worksheets(TARGET_TABLE).Cells(Row, i) = Worksheets(SOURCE_TABLE).Cells(Row, SrcColumnIndex)
        Else
            proStr = ""
            For j = 1 To UBound(arr)
                SrcColumnIndex = SrcRowNameToIndex(arr(j))
                proStr = proStr & """" & Worksheets(SOURCE_TABLE).Cells(1, SrcColumnIndex) & """" & ":" & Worksheets(SOURCE_TABLE).Cells(Row, SrcColumnIndex)
                If j < UBound(arr) Then
                    proStr = proStr & ", "
                End If
            Next
            proStr = proStr & ""
            
            Worksheets(TARGET_TABLE).Cells(Row, i) = proStr
        End If
    Next
Next
    

End Sub
' 根据传入参数索引单元格，然后返回它后面单元格的值
Function GetValueByKey(ByVal Sheetname As String, Key As String, ByVal RowLimit As Integer, ByVal SearchColumn As Integer) As String
    For Row = 1 To RowLimit
        If Worksheets(Sheetname).Cells(Row, SearchColumn) = Key Then
            GetValueByKey = Worksheets(Sheetname).Cells(Row, SearchColumn + 1)
        End If
    Next Row
End Function
' 计算行数，从第一行开始往下数，直到第N行第1列为空，则行数为N-1
Function CountRow(ByVal Sheetname As String) As Integer
    Count = 1
    CountRow = 1
    While Count > 0
     If Worksheets(Sheetname).Cells(Count, 1) <> "" Then
           CountRow = Count
           Count = Count + 1
     Else
            Count = 0
     End If
    Wend
End Function
' 计算某行的列数
Function CountColumn(ByVal Sheetname As String, ByVal Row As Integer) As Integer
    Count = 1
    CountColumn = 1
    While Count > 0
     If Worksheets(Sheetname).Cells(Row, Count) <> "" Then
           CountColumn = Count
           Count = Count + 1
     Else
            Count = 0
     End If
    Wend
End Function
' 字母列号转数字
Function ColumnNumber(ByVal ColumnLetter As String) As Integer
       If Len(ColumnLetter) > 1 Then
           ColumnNumber = (Asc(Mid(ColumnLetter, 1, 1)) - 64) * 26 + (Asc(Mid(ColumnLetter, 2, 1)) - 64)
       Else
           ColumnNumber = Asc(ColumnLetter) - 64
       End If
End Function