读取excel表中的数据

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.format.CellFormat;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public List<Bean> getDataFormExcel() {
        // TODO Auto-generated method stub
        File f = null;
        InputStream is = null;
        List<Bean> allDataBeans = new ArrayList<Bean>();
        try {
            f = new File(this.getClass().getResource("/").getPath());
            String path = f.getAbsolutePath();
            String newPath = path.replace('\', '/');
            if (newPath.contains("apache")) {
                newPath = newPath.substring(0, newPath.indexOf("/apache"));
            }
            String dirName = newPath + "/batchne/"; // 获取自己创建的文件夹路径
            f = new File(dirName);
            if (!f.exists()) {
                f.mkdirs();
            }
            String fileNames[] = f.list(); // 获取文件夹下的文件
            if(fileNames.length == 0){
                System.out.println("目录下无文件");
                return allDataBeans;
            }
            String resultFileName = "";
            System.out.println("文件 is " + fileNames[0]);
            resultFileName = fileNames[0];
            f=new File(dirName+resultFileName);
            //获取文件类型是xls还是xlsx
            String fileType = resultFileName.substring(resultFileName.lastIndexOf(".") + 1);
            System.out.println(fileType);
            is = new FileInputStream(f);
            Workbook xssfWorkbook = null;
            //兼容xls和xlsx两种格式
            if (fileType.equals("xls")) {
                xssfWorkbook = new HSSFWorkbook(is);
            } else if (fileType.equals("xlsx")) {
                xssfWorkbook = new XSSFWorkbook(is);
            }else {
                System.out.println("表格格式错误");
            }
            //获取第一个单元
            Sheet sheet = xssfWorkbook.getSheetAt(0);
            // 得到所有的行数
            int rows = sheet.getLastRowNum();
            // 越过第一行 它是列名称
            for (int j = 1; j <=rows; j++) {
                 Bean Bean = Bean();
                // 得到每一行的单元格的数据
                Row row = sheet.getRow(j);
                Bean.setType(String.valueOf(row.getCell(0)));
                // 存储每一条数据
                allDataBeans.add(Bean);
            }
        
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return allDataBeans;
    }