需要jar包:poi-3.7-20101029.jar
poi-examples-3.7-20101029.jar
poi-ooxml-3.7-20101029.jar
poi-ooxml-schemas-3.7-20101029.jar
poi-scratchpad-3.7-20101029.jar
xmlbeans-2.3.0.jar

/**

• @param filepath //文件路径
• @param filename //文件名
• @param startrow //开始行号
• @param startcol //开始列号
• @param sheetnum //sheet

• @return list
  */
  public static List<Object> readExcel(String filepath, String filename, int startrow, int startcol, int sheetnum) {
  List<Object> varList = new ArrayList<Object>();

  try {
      File target = new File(filepath, filename);
      FileInputStream fi = new FileInputStream(target);
      Workbook wb = null; 
      try{
           wb = new XSSFWorkbook(fi);
  
      }
       catch (Exception ex) { 
           wb = new HSSFWorkbook(new FileInputStream(target));
          } 
      Sheet sheet = wb.getSheetAt(sheetnum);                  //sheet 从0开始
  
      FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator(); 
      int rowNum = sheet.getLastRowNum() + 1;                     //取得最后一行的行号
  
      for (int i = startrow; i < rowNum; i++) {                   //行循环开始
  
          PageData varpd = new PageData();
          Row row = sheet.getRow(i);                          //行
          int cellNum = row.getLastCellNum();                     //每行的最后一个单元格位置
  
          for (int j = startcol; j < cellNum; j++) {              //列循环开始
  
              DecimalFormat df = new DecimalFormat("0.000000");  
              Cell cell1 = row.getCell(Short.parseShort(j + ""));
              CellValue cell = evaluator.evaluate(cell1);
              String cellValue = null;
              if (null != cell) {
                  switch (cell.getCellType()) {                   // 判断excel单元格内容的格式，并对其进行转换，以便插入数据库
                  case 0:
                      cellValue = df.format(cell.getNumberValue());
                      break;
                  case 1:
                      cellValue = cell.getStringValue();
                      break;
                  case 2:
                      cellValue = cell.getNumberValue() + "";
                      // cellValue = String.valueOf(cell.getDateCellValue());
                      break;
                  case 3:
                      cellValue = "";
                      break;
                  case 4:
                      cellValue = String.valueOf(cell.getBooleanValue());
                      break;
                  case 5:
                      cellValue = String.valueOf(cell.getErrorValue());
                      break;
                  }
              } else {
                  cellValue = "";
              }
  
              varpd.put("var"+j, cellValue);
  
          }
          varList.add(varpd);
      }
  
  } catch (Exception e) {
      System.out.println(e);
  }
  
  return varList;

  }