Apache POI -有没有办法计算字符串在数据透视表中的出现次数？

import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import java.io.FileInputStream;
import java.io.IOException;

public class PivotTableStringCount {
    public static void main(String[] args) {
        try {
            // 打开Excel文件
            FileInputStream file = new FileInputStream("path/to/your/excel/file.xlsx");
            Workbook workbook = new XSSFWorkbook(file);

            // 获取数据透视表
            Sheet pivotSheet = workbook.getSheet("PivotTableSheet");
            PivotTable pivotTable = pivotSheet.getPivotTables().get(0);

            // 获取数据透视表的数据源范围
            AreaReference source = pivotTable.getPivotCacheDefinition().getAreaReferences()[0];
            Sheet sourceSheet = workbook.getSheet(source.getFirstSheetName());
            CellRangeAddress sourceRange = source.getFirstCell().getCellRangeAddress(sourceSheet);

            // 计数器
            int count = 0;

            // 遍历数据源范围，计算字符串出现次数
            for (int row = sourceRange.getFirstRow(); row <= sourceRange.getLastRow(); row++) {
                for (int col = sourceRange.getFirstColumn(); col <= sourceRange.getLastColumn(); col++) {
                    Row currentRow = sourceSheet.getRow(row);
                    Cell currentCell = currentRow.getCell(col);

                    if (currentCell != null && currentCell.getCellType() == CellType.STRING) {
                        String cellValue = currentCell.getStringCellValue();
                        if (cellValue.equals("targetString")) {
                            count++;
                        }
                    }
                }
            }

            System.out.println("字符串在数据透视表中出现的次数：" + count);

            // 关闭文件
            workbook.close();
            file.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}