1、excel的导入

前端代码：

由于前端type="file"的样式固定，可以隐藏input，通过其他按钮点击触发上传，用户上传文件后input的值发生变化触发change事件调用ajax

	$('#fileId').change(function(){//获取用户上传文件var files = $('#fileId')[0].filesvar i_type = 0;//定义传参格式var data = new FormData();data.append('avatar', files[0]);data.append('i_type',i_type);$.ajax({url: cp + 'mgt/depotwares/import.do',type: 'POST',data: data,cache: false,processData: false,contentType: false,success:function (data) {var result = JSON.parse(data);$("#fileId").val('');if(result.s_code == "000000"){var sucess = result.o_data[0]var fail = result.o_data[1]layer.confirm(("导入成功! 成功:"+sucess+",失败:"+fail),{btn: ['关闭','下载失败信息'] //按钮}, function(){//是layer.closeAll();},function(){//let downloadurl="http://localhost:8081/fhxhcps//mgt/depotwares/downloadfail.do";let label = $("<a>");label.prop("href",downloadurl);$("body").append(label)label[0].click();label.remove();});}else{layer.msg(result.s_msg)}}});});

后端代码：

controller层接收

	public void WaresBatchUpdate(HttpServletRequest request,HttpServletResponse response,@RequestParam(required = false, value = "avatar") MultipartFile filename,HttpSession session,  Model model,String i_type) throws IOException

实现类：

	ResultMap resMap = new ResultMap();//更新条数结果返回List list = new ArrayList();//记录所有excel数据List lists = new ArrayList();//用于写入保存失败数据List<ExcelVO> failList = new ArrayList();List<PvdSettleVO> pvdfailList = new ArrayList<>();List<IWaresVO> iWaresList = new ArrayList<>();//记录成功条数int sucess = 0;//记录失败条数int fail = 0;//判断当前修改税务编码还是供应商Workbook workbook = null;Properties properties = PropertiesUtil.load("pdf_config/exportPdf.properties");String wordGenerDir = properties.getProperty("excel.taxno.savepath");String name = Str(userMap.get("s_name"),"");String sUser = Str(userMap.get("s_user"),"");Date now = new Date();SimpleDateFormat outFormat = new SimpleDateFormat("yyyyMMddHHmmss");String time = outFormat.format(now);String newFile = name+sUser+"DT"+time +file.getOriginalFilename();String path2 = wordGenerDir+newFile;ResultMap resMap = new ResultMap();File foler = null;// 读取excel文件FileInputStream in = null;// 获取工作簿Workbook workbook = null;//获取路径foler = new File(path2);String path = foler.getAbsolutePath();String filetype = path.substring(path.lastIndexOf("."));try {file.transferTo(foler);File dest = new File(path);in = new FileInputStream(path);if (!foler.getParentFile().exists()) {//创建foler.getParentFile().mkdirs();}if (filetype.equals(".xls")) {workbook = new HSSFWorkbook(in);} else if (filetype.equals(".xlsx")) {workbook = new XSSFWorkbook(in);} else {resMap.setS_code(Constants.RES_MSG_ERROR);resMap.setS_msg("文件类型必须是xls或xlsx:" + file.getOriginalFilename());dest.delete();return resMap;}}catch (Exception e){System.out.println("文件异常");}finally {try {if (in != null) {in.close();}if (workbook != null) {workbook.close();}} catch (IOException e) {resMap.setS_msg("关闭流失败");}}try {//获取sheet1Sheet sheet = workbook.getSheetAt(0);//获取表中内容int rowCount = sheet.getPhysicalNumberOfRows();for (int rowNum = 1; rowNum < rowCount; rowNum++) {String value1 = "";String value2 = "";String value3 = "";Row rowData = sheet.getRow(rowNum);Map map = new HashMap();if (rowData != null) {Cell cell1 = rowData.getCell(0);Cell cell2 = rowData.getCell(1);Cell cell3 = rowData.getCell(2);value1 = ExcelUtils.getCellValue(cell1);value2 = ExcelUtils.getCellValue(cell2);value3 = ExcelUtils.getCellValue(cell3);map.put("col1", value1);map.put("col2", value2);map.put("col3", value3);lists.add(map);}}//excel写入未导入成功信息//repath即为存放文件路径(绝对路径+名称)ExcelWriterBuilder write = EasyExcel.write(repath);ExcelWriterSheetBuilder sheet1 = write.sheet();sheet1.doWrite(failList);

2.Excel的模板下载

这里用的是在本地下载文件，指定一个文件路径创建excel模板，通过流的方式直接下载

前端代码：直接通过访问接口方式建立下载链接

$("#downloadWare").click(function () {$.ajax({url: cp + 'mgt/depotwares/downloadWareTemplete.do',method: 'get',type:"application/vnd.ms-excel",responseType:"blob",success: function(data){let downloadurl="http://localhost:8081/depotwares/downloadWareTemplete.do";let label = $("<a>");label.prop("href",downloadurl);$("body").append(label)label[0].click();label.remove();layer.msg("下载成功")}})})

后端代码：

try {// path是指下载的文件的路径。File file = new File(ExcelUtils.getFolerPath());// 取得文件名。String filename = file.getName();// 以流的形式下载文件。InputStream fis = new BufferedInputStream(new FileInputStream(ExcelUtils.getFolerPath()));byte[] buffer = new byte[fis.available()];fis.read(buffer);fis.close();// 清空responseresponse.reset();// 设置response的Headerif(request.getHeader("user-agent").toLowerCase().indexOf("firefox")>-1){response.setHeader("Content-Disposition","attachment;filename=" +new String(filename.getBytes("utf-8"),"ISO-8859-1"));}else {response.addHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(filename, "utf-8"));}response.addHeader("Content-Length", "" + file.length());OutputStream toClient = new BufferedOutputStream(response.getOutputStream());response.setContentType("application/octet-stream");toClient.write(buffer);toClient.flush();toClient.close();} catch (Exception e) {response.reset();response.setContentType("application/json");response.setCharacterEncoding("utf-8");resMap.setS_code(Constants.RES_CODE_ERROR);resMap.setS_msg(Constants.RES_MSG_ERROR);}

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