java - Excel VBA函数转Java poi

Question

我是java新手，请耐心等待。我知道 java apache poi 内置了以下功能，但我对如何使用它有点迷失:

1) code_col = WorksheetFunction.Match("代码",sheet.Range("1:1"), 0)

2) count = WorksheetFunction.CountIf(ref_sheet.Range("A:A"), 收款人)

3) lr =sheet.Cells(1, 1).CurrentRegion.Rows.count

如果您可以提供 VBA 代码如何转换为其等效的 java apache poi 的示例，那将是一个很大的帮助。
所以我基本上将 VBA 模块转换为 java。我使用 apache poi 库。然而，上面的 3 行代码我很难转换成它的 java 等价代码

Answer 1

正如我在评论中所说，这个问题不能笼统地回答。

Apache poi 用于为 Microsoft Office 创建文件。因此，apache poi 能够创建 Excel 文件，其中的函数 MATCH 和 COUNTIF 存储在单元格的公式中。如果它有权访问这些公式中引用的所有单元格，它还能够计算这些公式。

举一个具体的例子，有一个像这样的 MSExcelWithVBA.xlsm:

和VBA代码如下:

Sub test()
 Set this_sheet = ThisWorkbook.Worksheets("Sheet1")
 code_col = WorksheetFunction.Match("Code", this_sheet.Range("1:1"), 0)
 Debug.Print "code_col: " & code_col
 payee = "b"
 payee_count = WorksheetFunction.CountIf(this_sheet.Range("A:A"), payee)
 Debug.Print "payee_count: " & payee_count
 count_rows_in_region = this_sheet.Cells(1, 1).CurrentRegion.Rows.Count
 Debug.Print "count_rows_in_region: " & count_rows_in_region
End Sub

然后此 VBA 代码将打印到立即窗口:

code_col: 4
payee_count: 3
count_rows_in_region: 9

使用相同的 MSExcelWithVBA.xlsm，Java 代码如下:

import java.io.FileInputStream;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.*;
import org.apache.poi.ss.formula.WorkbookEvaluator;
import org.apache.poi.ss.formula.eval.*;

public class ExcelEvaluateSomeFunctions{

 public static void main(String[] args) throws Exception {
  Workbook workbook = WorkbookFactory.create(new FileInputStream("MSExcelWithVBA.xlsm"));
  Sheet this_sheet = workbook.getSheet("Sheet1");
  CreationHelper helper = workbook.getCreationHelper();

  XSSFFormulaEvaluator formulaevaluator = (XSSFFormulaEvaluator)helper.createFormulaEvaluator();
  WorkbookEvaluator workbookevaluator = formulaevaluator._getWorkbookEvaluator();
  ValueEval valueeval = null;

  //code_col = WorksheetFunction.Match("Code", this_sheet.Range("1:1"), 0)
  double code_col = Double.NaN;
  valueeval = workbookevaluator.evaluate("MATCH(\"Code\", " + this_sheet.getSheetName() + "!1:1, 0)", null);
  if (valueeval instanceof NumberEval) {
   code_col = ((NumberEval)valueeval).getNumberValue();
  }
  System.out.println("code_col: " + code_col);

  //payee_count = WorksheetFunction.CountIf(this_sheet.Range("A:A"), payee)
  String payee = "b";
  double payee_count = Double.NaN;
  valueeval = workbookevaluator.evaluate("COUNTIF(" + this_sheet.getSheetName() + "!A:A, \"" + payee + "\")", null);
  if (valueeval instanceof NumberEval) {
   payee_count = ((NumberEval)valueeval).getNumberValue();
  }
  System.out.println("payee_count: " + payee_count);

  //count_rows_in_region = this_sheet.Cells(1, 1).CurrentRegion.Rows.Count
  //this is not possible since apache poi does not know the concept of CurrentRegion
  //best you could do:
  int count_rows_in_sheet = this_sheet.getLastRowNum()+1;
  System.out.println("count_rows_in_sheet: " + count_rows_in_sheet);

  workbook.close();
 }  
}

打印到System.out:

code_col: 4.0
payee_count: 3.0
count_rows_in_sheet: 9