求一个poi的封装好的工具类

@Test
public void getCheckInPersonList(){
String filePath = new String("E:\2014年龙居山9月考勤.xls");
File file = new File(filePath);
if(file.exists()){
if(file.getName() != null){
String suffix = file.getName().substring(file.getName().lastIndexOf(".")+1);
if("xls".equals(suffix)) 
for (CheckInPersonBean p : readXLS(file)) {
System.out.println("ID:"+p.getId()+" 单位:"+p.getUnit()+" 姓名:"+p.getName()+" 时间:"+p.getWorkDate()+" 上班打卡时间:"+p.getWorkStartTime()+" 下午打卡时间:"+p.getWorkEndTime());
}
} 
}
}
public List<CheckInPersonBean> readXLS(File file){
    List<CheckInPersonBean> personBeanList = new ArrayList<CheckInPersonBean>();
    try {
        InputStream is = new FileInputStream(file);
        HSSFWorkbook workbook = new HSSFWorkbook(is);
        if(workbook != null){
            //getNumberOfSheets 得到工作表数量
            //System.out.println(workbook.getNumberOfSheets()+"工作表数量");
            for(int i=0;i<workbook.getNumberOfSheets();i++){
                //getSheetAt(i) 循环得到第i张工作表
                HSSFSheet sheet = workbook.getSheetAt(i);
                if(sheet != null){
                    //getLastRowNum() 得到工作表中最后一行号
                    //System.out.println("第"+(i+1)+"张表最后一个行号是:"+sheet.getLastRowNum());
                    CheckInPersonBean personBean = null;
                    for(int j=1;j<=sheet.getLastRowNum();j++){
                        //getRow(j) 得到第j行数据
                        HSSFRow row = sheet.getRow(j);
                        //得到行最后一个单元格数字    getLastCellNum  该表中第j行最后一个单元格号(只要是单元格就计算,不论内值是否有效)
                        if(row != null && row.getLastCellNum() >= 9){
                            personBean = new CheckInPersonBean();
                            setData(row.getCell(0), personBean, "i");
                            personBean.setUnit(String.valueOf(row.getCell(1)));
                            personBean.setName(String.valueOf(row.getCell(4)));
                            setData(row.getCell(5), personBean, "y");
                            setData(row.getCell(6), personBean, "t");
                            setData(row.getCell(8), personBean, "t");
                            personBeanList.add(personBean);
                        }
                    }
                }
            }
        }
    } catch (Exception e) {
        System.err.println(e);
    }
    return personBeanList;
}
public Object setDataByType(HSSFCell cell,String methodName,Class<?> paramType,Object obj){
    try {
        Class<?> clazz = obj.getClass();
        Method method = clazz.getMethod(methodName,paramType);
        switch (cell.getCellType()) {
            //0  double, 1 String 3 空白,4 boolean 5 错误
            case 0: 
                if("setId".equals(methodName)) method.invoke(obj, String.valueOf((int)cell.getNumericCellValue()));
                break;
            case 1: method.invoke(obj, cell.getStringCellValue()); break;
            case 3: method.invoke(obj, String.valueOf(cell)); break;
            case 4: method.invoke(obj, cell.getBooleanCellValue()); break;
            case 5: method.invoke(obj, ""); break;
            default:
                method.invoke(obj, new SimpleDateFormat("yyyy-MM-dd"),cell);
                break;
        }
    } catch (Exception e) {
    }
    return obj;
}
public Class<?> getClazz(HSSFCell cell){
    switch (cell.getCellType()) {
        case 0: return double.class;
        case 1: return String.class;
        case 3: return String.class;
        case 4: return boolean.class; 
        case 5: return String.class; 
        default:
            break;
    }
    return Date.class;
}
//setDataByType(row.getCell(0), "setId",getClazz(row.getCell(0)),personBean);

public void setData(HSSFCell cell,CheckInPersonBean bean,String sign){
    if("i".equals(sign)){
        if(cell.getCellType() == cell.CELL_TYPE_NUMERIC && cell != null){
            bean.setId(String.valueOf((int)cell.getNumericCellValue()));
        }
    }else if("y".equals(sign)){
        if(cell != null && cell.getCellType() == cell.CELL_TYPE_STRING){
            try {
                bean.setWorkDate(new SimpleDateFormat("yyyy-MM-dd").parse((String.valueOf(cell).replace(".", "-"))));
            } catch (ParseException e) {
                //转换错误,抛出异常
            }
        }
    }else{
        if(cell != null && cell.getCellType() == cell.CELL_TYPE_STRING){
            try {
                bean.setWorkStartTime(new SimpleDateFormat("mm:HH:ss").parse((String.valueOf(cell))));
            } catch (ParseException e) {
                //转换错误,抛出异常
            }
        }
    }
}
}