poi 导入Excle

  //读取excel
    public static Workbook readExcel(String filePath) {
        Workbook wb = null;
        if (filePath == null) {
            return null;
        }
        String extString = filePath.substring(filePath.lastIndexOf("."));
        InputStream is = null;
        try {
            is = new FileInputStream(filePath);    //获取文件流
            if (".xls".equals(extString)) {
                return wb = new HSSFWorkbook(is);   //将文件留转换成相对的Excle 模板    ， 2003版本
            } else if (".xlsx".equals(extString)) {
                return wb = new XSSFWorkbook(is); //将文件留转换成相对的Excle 模板       2007版本
            } else {
                return wb = null;
            }

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return wb;
    }

  public static  void  getExcle(String path){
        Workbook wb=null; //获取Excle
        Sheet sheet = null; //获取Excle 中的工作簿
        Row row = null; //获工作簿中行数据

        wb = readExcel(path);  //获取Excle
        sheet = wb.getSheetAt(0);//获取第一个工作簿
        int rownum =sheet.getPhysicalNumberOfRows();  //获取最大行数
        for(int i=0 ; i<rownum ;i++){  //循环遍历 数据
            row = sheet.getRow(i); //获取当前行数据
            System.out.println("第一列："+row.getCell(1)+"---第二列"+row.getCell(2));
        }
    }

 public static Map getIncident(String filePath) {
        Workbook wb = null;
        Sheet sheet = null;
        Row row = null;
        List<Map<String, String>> list = null;
        Map<String, String> map = new LinkedHashMap<String, String>();//存放Excle表格内容
        wb = readExcel(filePath);
        if (wb != null) {
            //用来存放表中数据
            list = new ArrayList<Map<String, String>>();
            //获取第一个sheet
            sheet = wb.getSheetAt(0);
            //获取最大行数
            int rownum = sheet.getPhysicalNumberOfRows();
            //获取第一行
            row = sheet.getRow(0);
            //获取最大列数
            int colnum = row.getPhysicalNumberOfCells();
            for (int i = 0; i < rownum; i++) {
                row = sheet.getRow(i);
                if (row != null) {
                    map.put((String) getCellFormatValue(row.getCell(0)), (String) getCellFormatValue(row.getCell(1)));
                } else {
                    break;
                }
            }
        }

        return map;
    /*//遍历解析出来的list
        for (Map.Entry<String,String> entry : map.entrySet()) {
            System.out.print(entry.getKey()+":"+entry.getValue()+",");
        }*/
    }