excl表格導出

 ServiceImpl包中代碼

@Override
	public void reportGoodsOrder(GoodsOrderVo goodsOrderVo, OutputStream fos) {
		List<GoodsOrderBo> orderGoodsOrderBos = getGoodsOrderBoList(goodsOrderVo);//獲得列表信息的方法
		for(GoodsOrderBo goodsOrder:orderGoodsOrderBos){
			if(goodsOrder.getStatusItype()==1){
				goodsOrder.setStatusStr("待發貨");
			}
			if(goodsOrder.getStatusItype()==2){
				goodsOrder.setStatusStr("已發貨");
			}
			if(goodsOrder.getStatusItype()==3){
				goodsOrder.setStatusStr("已完成");
			}//將狀態從數字映射成字符串
			if(goodsOrder.getPayItype()==1){
				String payAmtStr = goodsOrder.getPayAmt()+"CBS";
				goodsOrder.setPayAmtStr(payAmtStr);
			}else{
				String payAmtStr = "￥"+goodsOrder.getPayAmt();
				goodsOrder.setPayAmtStr(payAmtStr);
			}
		}
		log.info("#############orderGoodsOrderBos:{}", orderGoodsOrderBos);
		try {
			LinkedHashMap<String, String> map = new LinkedHashMap<String, String>();
			map.put("goodsOrderCode", "訂單號");
			map.put("createDate", "下單時間");
			map.put("userName", "下單人姓名");
			map.put("phone", "手機號碼");
			map.put("payAmtStr", "訂單金額");
			map.put("statusStr", "狀態");
			map.put("orderExpressName", "物流公司");
			map.put("expressCode", "物流編碼");//映射到表格
			CSVUtils.createExcel(orderGoodsOrderBos, map, 0, "", "", fos);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

Reource包中代碼

@ResponseBody
	@RequestMapping(value = "/nofilter/order", method = RequestMethod.GET)
	public void getDownloadOrderList(@QueryParam("key") String key,@QueryParam("statusItype") Integer statusItype) {//獲取刪選條件
		statusItype = statusItype == null ? 0 : statusItype;
		GoodsOrderVo goodsOrderVo = GoodsOrderVo.builder().key(key).statusItype(statusItype).build();
		log.info("###########goodsOrderVo:{}",goodsOrderVo);
		try {
			String fileName = "GoodsOrderList.xls";
			OutputStream fos = null;
			response.addHeader("Content-Disposition",
					"attachment;filename=" + new String(fileName.getBytes("UTF-8"), "UTF-8"));
			fos = response.getOutputStream();
			goodsOrderService.reportGoodsOrder(goodsOrderVo, fos);;
			response.getOutputStream().flush();
			response.getOutputStream().close();
			response.flushBuffer();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
		}
	}

易錯誤點：列表傳遞參數時沒有PAGESIZE參數，但是列表查詢的SQL語句排序時用到PAGESIZE參數，會導致報錯；

解決方法：增加判斷條件，如果pageSize=0時排序只根據ID排序；或者傳遞pageSize限制表格生成數據的數量