poi 读取 excel (.xls) 97-2003

1.sh.getLastRowNum() 比行数少1

private List<Map>  getData(File file) throws Exception{
        List<Map> list = new ArrayList<Map>(); //存放excel的data 每个list是sheet

        //获取IO流
        BufferedInputStream in = new BufferedInputStream(new FileInputStream(file));
        //打开HSSFWorkbook
        POIFSFileSystem fs = new POIFSFileSystem(in);
        HSSFWorkbook wb = new HSSFWorkbook(fs);//获取HSSWorkbook
        int sheetsNum = wb.getNumberOfSheets();//excel sheet
        //解析sheet的数据
        for(int i = 0 ; i < sheetsNum ; i++){
            Map map = new HashMap();
            HSSFSheet sh = wb.getSheetAt(i);//得到sheet
            //解析行
            int columnNum = 0;
            for(int j = 0 ; j <= sh.getLastRowNum() ; j++){
                HSSFRow row = sh.getRow(j);
                //解析列
                for(int z = 0; z < row.getLastCellNum(); z++){
                    HSSFCell cell = row.getCell(z);

                    if(cell != null){
                        if(cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC){
                             map.put(j + "" + z, cell.getNumericCellValue());
                        }
                        if(cell.getCellType() == HSSFCell.CELL_TYPE_STRING){
                             map.put(j + "" + z, cell.getStringCellValue());
                        }
                    }
                }
                columnNum = row.getLastCellNum();
            }
            if(sh.getLastRowNum() != 0 && columnNum != 0){
                map.put("rowNum" ,sh.getLastRowNum() + 1);
                map.put("columnNum", columnNum);
                list.add(map);
            }
        }
        return list;
    }