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"); }