如何使用Java和apache poi选择excel中的所有单元格

import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

File file = new File("path/to/your/excel/file.xlsx");
FileInputStream fis = new FileInputStream(file);
Workbook workbook = new XSSFWorkbook(fis);

Sheet sheet = workbook.getSheetAt(0); // 0表示第一个工作表

for (Row row : sheet) {
    for (Cell cell : row) {
        CellType cellType = cell.getCellType();
        if (cellType == CellType.STRING) {
            String cellValue = cell.getStringCellValue();
            System.out.println(cellValue);
        } else if (cellType == CellType.NUMERIC) {
            double cellValue = cell.getNumericCellValue();
            System.out.println(cellValue);
        } // 其他类型的单元格处理类似
    }
}

workbook.close();
fis.close();