POI XSSF读取所有列，而不仅仅是所有定义的列-不需要结果

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

public class ExcelReader {
    public static void main(String[] args) {
        try {
            FileInputStream file = new FileInputStream("path/to/your/excel.xlsx");
            Workbook workbook = new XSSFWorkbook(file);
            Sheet sheet = workbook.getSheetAt(0);

            for (Row row : sheet) {
                int lastCellNum = row.getLastCellNum();
                for (int i = 0; i < lastCellNum; i++) {
                    Cell cell = row.getCell(i, Row.MissingCellPolicy.CREATE_NULL_AS_BLANK);
                    CellType cellType = cell.getCellType();
                    // 根据需要处理不同类型的单元格数据
                    switch (cellType) {
                        case STRING:
                            String cellValue = cell.getStringCellValue();
                            System.out.println("Cell value: " + cellValue);
                            break;
                        case NUMERIC:
                            double numericValue = cell.getNumericCellValue();
                            System.out.println("Numeric value: " + numericValue);
                            break;
                        // 其他类型的处理...
                    }
                }
            }

            workbook.close();
            file.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}