JavaWeb使用POI操作Excel文件实例

//遍历一个Excel文件<br>private void getExcelData(File file) {
  System.out.println("now in getExcelData" );
  System.out.println("get file name："+file.getName().toString());
  XSSFWorkbook workBook= null;
  try {
   workBook = new XSSFWorkbook(file);
   int sheetCount = workBook.getNumberOfSheets(); //Sheet的数量
   System.out.println("num of sheet is : "+sheetCount);
   //遍历每个sheet
   for(int i=0;i<sheetCount;i++)
   {
    XSSFSheet sheet = workBook.getSheetAt(i);
    //获取总行数
    int rowCount = sheet.getPhysicalNumberOfRows();
    System.out.println("num of row : "+ rowCount);
    System.out.println("i now in sheet : "+ i);
    //遍历每一行 
    for (int r = 0; r < rowCount; r++) {
     XSSFRow row = sheet.getRow(r); 
     //获取总列数 
     int cellCount = row.getPhysicalNumberOfCells();
     //遍历每一列 
      for (int c = 0; c < cellCount; c++) {
       XSSFCell cell = row.getCell(c);
       String cellValue = null;
       switch (cell.getCellTypeEnum()) {
      case STRING:
       //System.out.println("celltype is string");
       cellValue = cell.getStringCellValue(); 
       break;
      case NUMERIC:
       //System.out.println("celltype is Number");//整数，小数，日期
       cellValue = String.valueOf(cell.getNumericCellValue());
       break;
      case BOOLEAN:
       //System.out.println("celltype is Boolean");
       cellValue = String.valueOf(cell.getBooleanCellValue()); 
       break;
      case FORMULA:
       //System.out.println("celltype is Formula");//公式
       cellValue = "错误,不能为公式"; 
       break;
      case BLANK:
       //System.out.println("celltype is Blank");//空白
       cellValue = cell.getStringCellValue();
       break;
      case ERROR:
       //System.out.println("celltype is Error");
       cellValue = "错误"; 
       break;
      default:
       //System.out.println("celltype : default");
       cellValue = "错误";
       break;       
      }
       System.out.println(cellValue.toString());
      }
    }
   }
  } catch (IOException e) {
   System.out.println("File Error IOException : "+e.getMessage());
  } 
  catch (Exception e) {
   // TODO: handle exception
  }
  finally {
   try {
    workBook.close();
   　　 } catch (Exception e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    System.out.println("workBook.close()&fileInputStream.close() Error : "+e.getMessage());  
   }
   System.out.println("Try Catch : finally");   
  }
  System.out.println("hi feipeng8848 getExcelData is done");
 }