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给个我之前的写的例子给你action 层public ActionForward dataExport(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) {

try {

response.setContentType("application/vnd.ms-excel;charset=UTF-8");

String filenames = "数据报表32313133353236313431303231363533e78988e69d8331333337383934_"+new Date().getTime()+".xls";

HttpUtil.setFileNameDownloadHeader(request, response, filenames);

OutputStream os = response.getOutputStream();

service.expdataReport(request, os);

response.flushBuffer();

os.close();

} catch (RowsExceededException e) {

e.printStackTrace();

}  catch (WriteException e) {

e.printStackTrace();

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

service层public void expdataReport(HttpServletRequest request, OutputStream os)

throws IOException, RowsExceededException, WriteException {

String itemid = request.getParameter("itemInfo");

if (StringUtils.isEmpty(itemid)) {

return;

}

String hql = getZhiJianHql(request);

Map map = new HashMap();

map.put("itemid", itemid);

List list = (List) basedao

.getObjectsByCondtions(ItemReportTemplate.class, map, null);

WritableWorkbook wbook = Workbook.createWorkbook(os); // 工作表

WritableSheet sheet = wbook.createSheet("数据报表", 0);// 生成名为“sheet1”的工作表，参数0表示这是第一页

WritableFont times16font = new WritableFont(WritableFont.ARIAL, 10,

WritableFont.BOLD, false, UnderlineStyle.NO_UNDERLINE,

Colour.GRAY_50);

WritableCellFormat times16format = new WritableCellFormat(times16font); // 字体样式

ReportUtils.parseExcelHeader(sheet, times16format, list);

List list_c = (List) basedao

.ExcuteHQL(hql.toString());

if (list_c != null && list_c.size() > 0) {

for (int j = 0; j 

for (int i = 0; i 

ReportUtils.parseExcelCell(list.get(i), list_c.get(j),

sheet, i, j + 1);

}

}

}

wbook.write();

wbook.close();

}