django导出数据到excel

import xlwt,StringIo
def dumpData(request):

    #获取数据

    activitys = Activity.objects.all().order_by('id')

    if activitys:

        #创建workbook对象并设置编码

        ws = xlwt.Workbook(encoding='utf-8')

        w = ws.add_sheet(u'评论完成',cell_overwrite_ok=True)

        w.write(0, 0, u"订单编号")

        w.write(0, 1, u"买家")

        w.write(0, 2, u"购买时间")

        w.write(0, 3, u"付款金额")

        w.write(0, 4, u"提交订单号")

        w.write(0, 5, u"返现金额")

        w.write(0, 6, u"状态")

        excel_row = 1

        for activity in activitys:

            id = activity.id

            buyer = activity.buyer.buyer.username

            time = activity.time

            price = activity.pay

            orderId = activity.orderId

            payBack = activity.payBack

            status = activity.status

            w.write(excel_row, 0, id)

            w.write(excel_row, 0, buyer)

            w.write(excel_row, 0, time)

            w.write(excel_row, 0, price)

            w.write(excel_row, 0, orderId)

            w.write(excel_row, 0, payBack)

            w.write(excel_row, 0, status)

            excel_row += 1

        exist_file = os.path.exists('test.xls')

        if exist_file:

            os.remove(r'test.xls')

        ws.save('test.xls')

        #返回文件给客户

        sio = StringIO.StringIO()

        ws.save(sio)

        sio.seek(0)

        response = HttpResponse(sio.getvalue(), content_type='application/vnd.ms-excel')

        response['Content-Disposition'] = 'attachment; filename=test.xls'

        response.write(sio.getvalue())

        return response