Jtable添加exel表格少了一列？

各位大虾帮忙看下吧，我在Jtable中显示一个excel的表格，结果少了一列，找了很久都没找到问题。

private void xls ( File file ) throws BiffException, IOException {
Workbook wb = Workbook.getWorkbook(new FileInputStream (file));
Sheet sh = wb.getSheet(0);
int rows = sh.getRows();
for ( int j = 0; j < rows; j++ ) {
Cell [] oneRow = sh.getRow(j);
Vector one = new Vector ();//得到excel每一行内容
for ( int i = 0; i < oneRow.length; i++ ) {
one.add(oneRow[i].getContents());
}
System.out.println(one.toString());
dtm.addRow(one);
}
jTable.updateUI();
}