java POI（二）

name.xslx

public class Demo6 {

    public static void main(String[] args) throws IOException {
        InputStream is = new FileInputStream("F:\poi\name.xls");
        POIFSFileSystem fs = new POIFSFileSystem(is);
        HSSFWorkbook wb = new HSSFWorkbook(fs);
        HSSFSheet sheet = wb.getSheetAt(0);//获取第一个sheet页
        if(sheet==null){
            return;
        }
        //遍历row
        for(int rowNum = 0; rowNum<=sheet.getLastRowNum();rowNum++ ){
            HSSFRow row = sheet.getRow(rowNum);
            if(row == null){
                continue;
            }
            //遍历cell
            for (int cellNum = 0; cellNum < row.getLastCellNum(); cellNum++) {
                HSSFCell cell = row.getCell(cellNum);
                if(cell == null){
                    continue;
                }
                System.out.println(" ");
            }
            System.out.println();
        }
    }

    private static String getValue(HSSFCell cell){
        String cellvalue = "";
        switch (cell.getCellType()){
            case HSSFCell.CELL_TYPE_NUMERIC:
                    cellvalue = String.valueOf(cell.getNumericCellValue());
                break;
            case HSSFCell.CELL_TYPE_STRING:
                    cellvalue = String.valueOf(cell.getStringCellValue());
                break;
            case HSSFCell.CELL_TYPE_BOOLEAN:
                    cellvalue = String.valueOf(cell.getBooleanCellValue());
                break;
            case HSSFCell.CELL_TYPE_FORMULA:
                    cellvalue = String.valueOf(cell.getArrayFormulaRange());
                break;
            default:
                break;
        }
        return cellvalue;
    }
}

Exception:
            The supplied data appears to be in the Office 2007+ XML. 


关键问题的原因还是excel2003和excel2007版本的问题
3、解决办法
（1）判断文件后缀名是xls，还是xlsx
（2）如果是xls，使用HSSFWorkbook；如果是xlsx，使用XSSFWorkbook    

 疑问：解析excel还有很多个版本吗？？？？