java 按照sheet讀取excel表格

public class ReadExcel {
    public static Map<String,ArrayList<ArrayList<String>>> readExcel(String fileName, String path) {
        Map<String,ArrayList<ArrayList<String>>> map = new HashMap<String, ArrayList<ArrayList<String>>>();

        try {
            Workbook workBook = null;
            try {
                workBook = new XSSFWorkbook(path + "\\" + fileName);
            } catch (Exception ex) {
                workBook = new HSSFWorkbook(new FileInputStream(path + "\\"
                        + fileName));
            }

            for (int numSheet = 0; numSheet < workBook.getNumberOfSheets(); numSheet++) {
                ArrayList<ArrayList<String>> Row = new ArrayList<ArrayList<String>>();
                Sheet sheet = workBook.getSheetAt(numSheet);
                if (sheet == null) {
                    continue;
                }
                // 循環行Row
                for (int rowNum = 1; rowNum <= sheet.getLastRowNum(); rowNum++) {
                    Row row = sheet.getRow(rowNum);
                    if (row == null) {
                        continue;
                    }
                    // 循環列Cell
                    ArrayList<String> arrCell = new ArrayList<String>();
                    for (int cellNum = 0; cellNum < row.getLastCellNum(); cellNum++) {
                        Cell cell = row.getCell(cellNum);
                        if (cell == null) {
                            cell = row.createCell(cellNum);
                            cell.setCellValue("");
                        }
                        arrCell.add(getValue(cell));
                    }

                    Row.add(arrCell);
                }
                map.put(String.valueOf(numSheet), Row);

            }
        } catch (IOException e) {
            System.out.println("e:" + e);
        }

        return map;
    }

    @SuppressWarnings("static-access")
    private static String getValue(Cell cell) {
        if (cell.getCellType() == cell.CELL_TYPE_BOOLEAN) {
            return String.valueOf(cell.getBooleanCellValue());
        } else if (cell.getCellType() == cell.CELL_TYPE_NUMERIC) {
            return String.valueOf(cell.getNumericCellValue());
        } else {
            return String.valueOf(cell.getStringCellValue());
        }
    }

    /**
     * 返回map
     * key:sheet頁籤
     * value:List裏面的String[]爲一行的數據
     * @param sheet
     * @return
     */
    public static Map<String,List<String[]>> analysisExcel(String fileName, String path){
        System.out.println("------------------------");
        Map<String,ArrayList<ArrayList<String>>> sheet = readExcel(fileName, path);
        System.out.println("-------------------------------");
        Map<String,List<String[]>> map = new HashMap<String, List<String[]>>();
        for (int i=0;i<sheet.size();i++) {
            ArrayList<ArrayList<String>> row = sheet.get(String.valueOf(i));
            List<String[]> list = new ArrayList<String[]>();
            if(row.size()>0){
                for(int j=0;j<row.size();j++){
                    ArrayList<String> cell = row.get(j);
                    String[] c = new String[cell.size()];
                    for(int k=0;k<cell.size();k++){
                        c[k] = cell.get(k);
                    }
                    list.add(c);
                }
            }
            map.put(String.valueOf(i), list);
        }
        return map;
    }

    public static void main(String[] args) {

        Map<String,List<String[]>> list = analysisExcel("test.xlsx",
                "D:\\");
        System.out.println(list.toString());
        for(int i=0;i<list.size();i++){
            List<String[]> l = list.get("0");
            System.out.println(l);
        }
    }
}