Java中如何灵活获取excel中的数据

public static List<Map<String,Object>> test1() throws Exception{
        File file = new File("C:/Users/luo_a/Desktop/数据测试.xlsx");
        if (!file.exists()){
            throw new Exception("文件不存在!");
        }
        InputStream in = new FileInputStream(file);
        // 读取整个Excel
        XSSFWorkbook sheets = new XSSFWorkbook(in);
        // 获取第一个表单Sheet
        XSSFSheet sheetAt = sheets.getSheetAt(0);
        //默认第一行为标题行，i = 0
        XSSFRow titleRow = sheetAt.getRow(0);
        List<Map<String,Object>> mapList = new ArrayList<>();
        // 循环获取每一行数据
        for (int i = 1; i < sheetAt.getPhysicalNumberOfRows(); i++) {
            XSSFRow row = sheetAt.getRow(i);
            // 读取每一列内容
            Map<String,Object> map = new HashMap<>();
            for (int index = 0; index < row.getPhysicalNumberOfCells(); index++) {
                XSSFCell titleCell = titleRow.getCell(index);
                XSSFCell cell = row.getCell(index);
                cell.setCellType(CellType.STRING);
                if (cell.getStringCellValue().equals("")) {
                    continue;
                }
                //表头数据
                String titleName = titleCell.getStringCellValue();
                //单元格内容
                String valueName = cell.getStringCellValue();
                //每一行的数据
                map.put(titleName,valueName);
            }
            mapList.add(map);
        }
        System.out.println(JSON.toJSONString(mapList));
        return mapList;
    }