excel导入及注意事项

　　在Excel导入过程中经常遇到单元格数据格式不正确引发的错误，在赋值前需要做下类型转换。

提供一个类型转换工具类:

 /**
      * 单元格类型转化工具类
      * @param cell
      * @return
      */
     private Map<String,Object> cellTypeDefine(Cell cell){
         Map<String,Object> map = new HashMap<>();
         switch (cell.getCellType()) {
         case Cell.CELL_TYPE_BOOLEAN:
             map.put("COL", cell.getBooleanCellValue());
             break;
         case Cell.CELL_TYPE_NUMERIC:
             map.put("COL", cell.getNumericCellValue());
             break;
         case Cell.CELL_TYPE_STRING:
             map.put("COL", cell.getStringCellValue());
             break;
         case Cell.CELL_TYPE_BLANK:
             map.put("COL","");
             break;
         case Cell.CELL_TYPE_FORMULA:
             map.put("COL", cell.getCellFormula());
             break;
         case Cell.CELL_TYPE_ERROR:
             map.put("COL","");
             break;
         default:
             map.put("COL", "");
             break;
         }
         return map;
     }

类型转换

Excel导入demo实例：

 public class ExcelImport {

     public String excelImport(File file) {
         HashMap<String, Sheet> typeSheet = null;
         List<CmWiringPo> wiringlist = new ArrayList<>();
         try{
             HSSFWorkbook workbook = new HSSFWorkbook() ;
             typeSheet = Maps.newHashMap();
             Cell cell = null;
             Row row = null;
             HSSFSheet sheet = workbook.getSheetAt(0);
             String sheetName = sheet.getSheetName();
             typeSheet.put(sheetName, sheet);

             for(int j=1;j < sheet.getLastRowNum()+1;j++){
                 row = sheet.getRow(j);
                 CmWiringPo cmWiringPo = new CmWiringPo() ;
                 //主键生成
                 cmWiringPo.setId(11L);
                 for(int k=0;k < row.getLastCellNum();k++){
                     cell = row.getCell(k);
                     switch (k) {
                     case 0:
                         Long srid = (long)cell.getNumericCellValue();
                         cmWiringPo.setSrid(srid);
                         break;
                     case 1:
                         cmWiringPo.setSourceCabinetUName(String.valueOf(cellTypeDefine(cell).get("COL")));
                         break;

                     default:
                         break;
                     }
                 }
             }

         }catch (Exception e) {

             return null;
         }
         return wiringlist.toString();
     }