如何用java在excel中按列阅读？

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

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

public class ExcelReader {
    public static void main(String[] args) {
        try {
            FileInputStream file = new FileInputStream(new File("path/to/your/excel/file.xlsx"));
            Workbook workbook = WorkbookFactory.create(file);
            Sheet sheet = workbook.getSheetAt(0); // 获取第一个工作表

            int columnToRead = 0; // 要阅读的列索引

            for (Row row : sheet) {
                Cell cell = row.getCell(columnToRead);
                if (cell != null) {
                    switch (cell.getCellType()) {
                        case STRING:
                            System.out.println(cell.getStringCellValue());
                            break;
                        case NUMERIC:
                            System.out.println(cell.getNumericCellValue());
                            break;
                        case BOOLEAN:
                            System.out.println(cell.getBooleanCellValue());
                            break;
                        // 其他类型的单元格处理
                    }
                }
            }

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