Java 读取excel 文件流

public static void initType(String path) {    try {        //1 获取excel文件流   excel  xls 文件   暂不支持xlsx
        if (path.contains("xlsx") || path.contains("XLSX")) {
            System.err.println("请使用xls格式文件");
            return;
        }
        InputStream inputStream = new FileInputStream(path);
        POIFSFileSystem fileSystem = new POIFSFileSystem(inputStream);
        HSSFWorkbook workbook = new HSSFWorkbook(fileSystem);
        //2 获取sheet 列数
        int sheets = workbook.getNumberOfSheets();
        //3 遍历所有sheet列
        for (int i = 0; i < sheets; i++) {
            //获取sheet
            HSSFSheet sheet = workbook.getSheetAt(i);
            //读取第一行
            HSSFRow headerRow = sheet.getRow(0);
            //获取sheet    所有行数
            int rows = sheet.getPhysicalNumberOfRows();
            List<String> headerColumns = new ArrayList<>();
            for (int j = 0; j < headerRow.getPhysicalNumberOfCells(); j++) {
                HSSFCell cell = headerRow.getCell(j);
                cell.getStringCellValue();
                headerColumns.add(cell.getStringCellValue());
            }
            //获取类型
            HSSFRow secondRow = sheet.getRow(1);            int cells = secondRow.getPhysicalNumberOfCells();            //对第二行的数据进行操作
            for (int j = 1; j < rows; j++) {
                HSSFRow row = sheet.getRow(j);
                List<String> cellsValue = new ArrayList<>();
                //获取字段属性    
                for (int k = 2; k < cells; k++) {
                    cellsValue.add(row.getCell(k).getStringCellValue());
                }            }        }}