需求：

给用户下载EXCEL模板 ，然后用户按模板填写进行批量新增。

一，实现下载模板（文件下载）

分析：其实就是前台发送请求后，然后下载服务器内固定地址的文件；

请求方式：

function excelDownload(){window.open("${basePath}terwarning/terminal/downloadExcle.json")
}
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web层的代码：

/*** 下载EXCEL模板* * @param request* @return* @throws Exception*/@RequestMapping("downloadExcle.json")public ResponseEntity<byte[]> downloadExcle(HttpServletRequest request)throws Exception {ServletContext servletContext = request.getServletContext();String fileName = "设备新增模板.xls";String realPath = servletContext.getRealPath("/attached/" + fileName);// 得到文件所在位置InputStream in = new FileInputStream(new File(realPath));// 将该文件加入到输入流之中byte[] body = null;body = new byte[in.available()];// 返回下一次对此输入流调用的方法可以不受阻塞地从此输入流读取（或跳过）的估计剩余字节数in.read(body);// 读入到输入流里面fileName = new String(fileName.getBytes("gbk"), "iso8859-1");// 防止中文乱码HttpHeaders headers = new HttpHeaders();// 设置响应头headers.add("Content-Disposition", "attachment;filename=" + fileName);HttpStatus statusCode = HttpStatus.OK;// 设置响应吗ResponseEntity<byte[]> response = new ResponseEntity<byte[]>(body,headers, statusCode);return response;}
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二.用户上传已经填好的模板，上传后批量新增

分析：

1.需要接收EXCEL文件 ，所以需要文件上传

2.需要解析EXCEL文件，  这里要用到apache的poi

3.解析到的数据提交到数据库，完成新增

注意：

1.为了方便用户，这里需要进行批量文件上传。

2.EXCEL里有几行数据就要新增几条数据到数据库，所以这里是批量新增提交，  后台要用for  循环添加。

3.  数据校验 ，每个字段必须都要做校验， 成功后方可新增提交；

4. 如果有一条数据校验失败，所有的数据都不允许新增， 要么全部都新增成功，要么全部新增失败， 保证用户一次操作的一致性，完整性。

模板示例：

前台文件上传form表单代码:

<form id="myFormId"action="${basePath}terwarning/terminal/excelAdd.save" method="post"target="frmright"><div class="box1" whiteBg="true"><table id="fileList" class="tableStyle" formMode=transparent><tr><td width="40%">选择模板：</td><td><input type="file" name="files" multiple="multiple"onchange="filechange(files)" /></td></tr><tr><td>所属组织：</td><td><div class="selectTree validate[required]"name="orgData.keyId"url="${basePath}common/exclude/queryOrgListAndSub.json"selectedValue="${entity.orgData.keyId }"></div> <spanclass="star">*</span></td></tr><tr><td colspan="2"><input id="submitBut" type="button" value="提交" /><input type="button" value="取消" onclick="quiDialog.close()" /></td></tr></table></div></form>
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JAVA后端逻辑：

/*** EXCEL新增* @RequestParam("file") MultipartFile file, HttpServletRequest* request)* * @return* @throws @throws* @throws Exception*/@RequestMapping("excelAdd.save")public ResponseEntity<String> excelAdd(@RequestParam("orgData.keyId") Integer orgId,@RequestParam("files") MultipartFile[] files,HttpServletRequest request) throws Exception {//此集合用于存放EXCEL每一条的值List<TerminalData> paramList = new ArrayList<TerminalData>();MessageModel messageModel = new MessageModel();//视图容器  ，非核心逻辑  LoginUserData loginUserData = CommonUtil.getCurrentUserData(request);UserData userData = loginUserData.getUserData();//获得当前登陆人对象// 判断file数组不能为空并且长度大于0if (files != null && files.length > 0) {// 判断文件是否是.xls的文件for (int i = 0; i < files.length; i++) {String string = files[i].getOriginalFilename();String xlString = string.substring(string.length() - 3, string.length());if (xlString.equals("xls") || xlString.equals("XLS")) {} else {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("上传时请使用有效的EXCEL模板文件");return PrintUtil.printResponseEntity(messageModel);}}// 循环解析EXCEL ，并完成数据校验，最后把新增对象add到List里for (int i = 0; i < files.length; i++) {// 上传文件操作MultipartFile file = files[i];String excelPath = request.getSession().getServletContext().getRealPath("/") + "attached/add.xls";file.transferTo(new File(excelPath));//// 解析EXCEL    sheet.getRow()获取行InputStream inputStream = new FileInputStream(excelPath);Workbook workbook = WorkbookFactory.create(inputStream);Sheet sheet = workbook.getSheetAt(0);Row row = sheet.getRow(0);int rowNum = sheet.getPhysicalNumberOfRows();//获得总行数int colNum = row.getPhysicalNumberOfCells();//获得总列数//对每一行的数据进行校验 ， 放进一个Listfor (int j = 1; j < rowNum; j++) {row = sheet.getRow(j);if (row != null) {TerminalData terminalData = new TerminalData();OrgData orgData = new OrgData();orgData.setKeyId(orgId);terminalData.setOrgData(orgData);terminalData.setStasus(0);if (row.getCell(0) == null ||row.getCell(0).equals("")) {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("终端名称是必填项");return PrintUtil.printResponseEntity(messageModel);}if (row.getCell(1) == null ||row.getCell(1).equals("")) {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("终端负责人是必填项");return PrintUtil.printResponseEntity(messageModel);}if (row.getCell(2) == null ||row.getCell(2).equals("")) {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("IP地址是必填项目");return PrintUtil.printResponseEntity(messageModel);}if ( row.getCell(3) == null ||row.getCell(3).equals("")) {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("MAC地址是必填项");return PrintUtil.printResponseEntity(messageModel);}if ( row.getCell(4) == null ||row.getCell(4).equals("")) {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("硬盘序列号是必填项");return PrintUtil.printResponseEntity(messageModel);}if (row.getCell(5) == null ||row.getCell(5).equals("")) {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("CPU是必填项");return PrintUtil.printResponseEntity(messageModel);}//因为EXCEL文件里,用.getStringCellValue()方法读取数字类型会报错， 这里做防止报错处理Cell numCell0 = row.getCell(0);if (numCell0 != null) {numCell0.setCellType(Cell.CELL_TYPE_STRING);}String cell0 = numCell0.getStringCellValue();Cell numCell1 = row.getCell(1);if (numCell1 != null) {numCell1.setCellType(Cell.CELL_TYPE_STRING);}String cell1 = numCell1.getStringCellValue();Cell numCell2 = row.getCell(2);if (numCell2 != null) {numCell2.setCellType(Cell.CELL_TYPE_STRING);}String cell2 = numCell2.getStringCellValue();Cell numCell3 = row.getCell(3);if (numCell3 != null) {numCell3.setCellType(Cell.CELL_TYPE_STRING);}String cell3 = numCell3.getStringCellValue();Cell numCell4 = row.getCell(4);if (numCell4 != null) {numCell4.setCellType(Cell.CELL_TYPE_STRING);}String cell4 = numCell4.getStringCellValue();Cell numCell5 = row.getCell(5);if (numCell5 != null) {numCell5.setCellType(Cell.CELL_TYPE_STRING);}String cell5 = numCell5.getStringCellValue();if(cell0.equals("")||cell0.length()==0&&cell1.equals("")||cell1.length()==0&&cell2.equals("")||cell2.length()==0&&cell3.equals("")||cell3.length()==0&&cell4.equals("")||cell4.length()==0&&cell5.equals("")||cell5.length()==0){}else {if (cell0.equals("")||cell0.length()==0) {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("终端名称是必填项");return PrintUtil.printResponseEntity(messageModel);}if (cell1.equals("")||cell1.length()==0) {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("终端负责人是必填项");return PrintUtil.printResponseEntity(messageModel);}if (cell2.equals("")||cell2.length()==0) {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("IP地址是必填项目");return PrintUtil.printResponseEntity(messageModel);}if (cell3.equals("")||cell3.length()==0) {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("MAC地址是必填项");return PrintUtil.printResponseEntity(messageModel);}if (cell4.equals("")||cell4.length()==0) {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("硬盘序列号是必填项");return PrintUtil.printResponseEntity(messageModel);}if (cell5.equals("")||cell5.length()==0) {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("CPU是必填项");return PrintUtil.printResponseEntity(messageModel);}}//放进对象后add到ListterminalData.setHostName(cell0);terminalData.setMasterName(cell1);terminalData.setIp(cell2);terminalData.setMac(cell3);terminalData.setHardDisk(cell4);terminalData.setCpu(cell5);terminalData.setType("1");terminalData.setCreateby(userData);terminalData.setDelflag("F");terminalData.setCreatetime(new Date());paramList.add(terminalData);} else {break;}}}TerminalData terminalData = new TerminalData();terminalData.setDelflag("F");//查询数据库已有全部设备，验证IP的MAC地址的唯一性 ，最后删除值全部为空的条目;List<TerminalData> termList = terminalService.queryList(terminalData);for (int i = 0; i < paramList.size(); i++) {if (!paramList.get(i).getHostName().equals("") && paramList.get(i).getHostName() != null&& !paramList.get(i).getMasterName().equals("") && paramList.get(i).getMasterName() != null&& !paramList.get(i).getIp().equals("") && paramList.get(i).getIp() != null&& !paramList.get(i).getMac().equals("") && paramList.get(i).getMac() != null&& !paramList.get(i).getHardDisk().equals("") && paramList.get(i).getHardDisk() != null&& !paramList.get(i).getCpu().equals("") && paramList.get(i).getCpu() != null) {String ipString = paramList.get(i).getIp();String macString = paramList.get(i).getMac();if (ipString.equals("") || ipString == null || macString.equals("") || macString == null) {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("MAC地址和IP地址是必填的");return PrintUtil.printResponseEntity(messageModel);}for (TerminalData term : termList) {if (ipString.equals(term.getIp())) {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("此IP地址已经存在,IP重复为" + ipString);return PrintUtil.printResponseEntity(messageModel);} else if (macString.equals(term.getMac())) {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("此MAC地址已经存在,MAC地址重复为" + macString);return PrintUtil.printResponseEntity(messageModel);}}} else {paramList.remove(i);i--;}}//验证所有EXCEL文件内是否有IP地址和MAC地址的重复for (int i = 0; i < paramList.size(); i++) {for (int j = 0; j < paramList.size(); j++) {if (i == j) {} else {if (paramList.get(i).getIp().equals(paramList.get(j).getIp())) {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("EXCEL内IP地址不能重复，重复的IP为：" + paramList.get(i).getIp());return PrintUtil.printResponseEntity(messageModel);}if (paramList.get(i).getMac().equals(paramList.get(j).getMac())) {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("EXCEL内MAC地址不能重复，重复的MAC为：" + paramList.get(i).getMac());return PrintUtil.printResponseEntity(messageModel);}}}}//终于完成了所有的盐城// 最后  循环List  完成新增操作for (TerminalData param : paramList) {terminalService.addOrUpdateData(param);}} else {messageModel.setOperFlag(ConstantData.OPER_ERROR);messageModel.setMessage("请选择有效的xls模板文件");return PrintUtil.printResponseEntity(messageModel);}messageModel.setOperFlag(ConstantData.OPER_SUCCESS);messageModel.setMessage("操作成功");return PrintUtil.printResponseEntity(messageModel);}
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