帮我优化以下代码Private Sub Command9_Click() Dim db As DAO.Database Dim rs As DAO.Recordset Dim strSQL As String Dim strFileName As String Dim i As Long Dim batchSize As Long '每批次导出的记录数 Dim batchCount As Long '批次计数器 Dim exportCount As Long '导出计数器 '设置导出文件路径和文件名 strFileName = "C:\Users\icd\Desktop\流水分割\" batchSize = 10000 '每批次导出的记录数 Set db = CurrentDb() strSQL = "SELECT 导出数据.* FROM 导出数据" Set rs = db.OpenRecordset(strSQL, dbOpenSnapshot) '循环导出数据 Do While Not rs.EOF If exportCount Mod batchSize = 0 Then '每批次导出到一个新的文件 If exportCount <> 0 Then DoCmd.TransferSpreadsheet acExport, acSpreadsheetTypeExcel12Xml, "ExportData", strFileName & Format(batchCount, "000000") & ".xlsx", True End If batchCount = batchCount + 1 End If exportCount = exportCount + 1 rs.MoveNext Loop '导出最后一份文件 If exportCount Mod batchSize <> 0 Then DoCmd.TransferSpreadsheet acExport, acSpreadsheetTypeExcel12Xml, "导出数据", strFileName & Format(batchCount, "000000") & ".xlsx", True End If rs.Close Set rs = Nothing Set db = Nothing End Sub

这段代码的主要功能是将Access数据库中的数据按批次导出到Excel文件中。以下是几点建议来优化这段代码：

1. 将变量声明放在代码的开头，以提高代码可读性和可维护性。

2. 考虑使用更具描述性的变量名，以提高代码可读性。

3. 考虑添加一些错误处理代码，以确保程序能够正常运行并提示错误信息。

4. 将DoCmd.TransferSpreadsheet方法的调用封装在一个单独的函数中，这样可以减少重复代码。

改进后的代码如下：

Private Sub Command9_Click()
Dim db As DAO.Database
Dim rs As DAO.Recordset
Dim strSQL As String
Dim strFileName As String
Dim i As Long
Dim batchSize As Long '每批次导出的记录数
Dim batchCount As Long '批次计数器
Dim exportCount As Long '导出计数器

'设置导出文件路径和文件名
strFileName = "C:\Users\icd\Desktop\流水分割\"
batchSize = 10000 '每批次导出的记录数

Set db = CurrentDb()
strSQL = "SELECT 导出数据.* FROM 导出数据"
Set rs = db.OpenRecordset(strSQL, dbOpenSnapshot)

On Error GoTo ErrorHandler

'循环导出数据
Do While Not rs.EOF
If exportCount Mod batchSize = 0 Then
'每批次导出到一个新的文件
If exportCount <> 0 Then
ExportToExcel "ExportData", strFileName & Format(batchCount, "000000") & ".xlsx", True
End If
batchCount = batchCount + 1
End If
exportCount = exportCount + 1
rs.MoveNext
Loop

'导出最后一份文件
If exportCount Mod batchSize <> 0 Then
ExportToExcel "导出数据", strFileName & Format(batchCount, "000000") & ".xlsx", True
End If

rs.Close
Set rs = Nothing
Set db = Nothing

Exit Sub

ErrorHandler:
MsgBox "Error " & Err.Number & ": " & Err.Description, vbCritical, "Error"
Exit Sub
End Sub

Private Sub ExportToExcel(tableName As String, fileName As String, hasHeaderRow As Boolean)
DoCmd.TransferSpreadsheet acExport, acSpreadsheetTypeExcel12Xml, tableName, fileName, hasHeaderRow
End Sub