请教：有关在JSP中保存Excel表格的问题！！！

[towzy]

本人在JSP中保存Excel时，用如下语句：
WritableWorkbook copy = Workbook.createWorkbook(...);
WritableSheet sheet = copy.getSheet(0);
...
WritableCell cell = sheet.getWritableCell(2, 3);
jxl.write.Number nc = (jxl.write.Number)cell;
nc.setValue(Double.parseDouble(sValue));
...

为什么总是将cell的边框，及格式都清除掉了，很难看。请诸位大虾帮忙！