最近工作有一个需求是要进行excel模板下载的，因为excel表头有一些复杂，所以没有用代码的方式来直接生成excel模板，而是将excel表格处理好以后，将查询出的数据写入excel中，而且我觉得最牛逼的是不需要获取file对象以及文件的绝对路径，兄弟们，绝bi好用，吐血推荐！！废话不多说，直接上excel和代码。(因为代码是自己写的，所以不涉及太多泄密内容，因此可以展示出来)
- excel模板如下，模板随意写，简单或更复杂的表头都可以。
代码如下：亲测好用，绝bi好用，兄弟们！！！
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341//我完全是在controller中写的 因此代码全部奉上 /** * 指标监测报表导出 * * @param request * @return * @throws Exception */ @RequestMapping("/excelTable") public void excelTable(HttpServletResponse response, HttpServletRequest request) throws Exception{ Map<String, Object> map = new HashMap<>(); // 获取导出的时间参数 String date = request.getParameter("Date"); map.put("Date", date); String fileName = "zbjc.xlsx"; // 使用类加载器获取excel文件流,基于模板填充数据 ClassPathResource classPathResource = new ClassPathResource(fileName); InputStream is = null; XSSFWorkbook workbook = null; try { is = classPathResource.getInputStream(); workbook = new XSSFWorkbook(is); XSSFSheet sheet = null; // 获取第一个sheet页 // getSheetAt和getsheet参数不一样， getSheetAt 的参数是索引， // getSheet的参数是sheet的名称， 获取具体名称的sheet。 sheet = workbook.getSheetAt(0); //去数据库中查询出的数据，这块就不给大家看了 List<SgwpdmSystemParameter> resutList = sgwpdmSystemParameterService.findAll("02", map); for (int i = 0; i < resutList.size(); i++) { int j = 4 + i; writeExcel(sheet, resutList, j, i); } } catch (IOException e) { e.printStackTrace(); } //文件下載 response.reset(); response.setContentType("text/html;charset=UTF-8"); response.setContentType("application/x-msdownload"); String newName = ""; try { newName = URLEncoder.encode("指标监测导出" + System.currentTimeMillis() + ".xlsx", "UTF-8"); response.addHeader("Content-Disposition", "attachment;filename="" + newName + """); OutputStream toClient = new BufferedOutputStream(response.getOutputStream()); workbook.write(toClient); toClient.flush(); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } //上述代码中有一个封装的方法，在下面展示 /** * 指标监测导出封装方法 * * @param sheet * @param resutList * 数据集合 * @param rownum * excel行数 * @param index * 集合索引 从0开始 */ public void writeExcel(XSSFSheet sheet, List<SgwpdmSystemParameter> resutList, Integer rownum, Integer index) { if (resutList.get(index) != null && !"".equals(resutList.get(index))) { Row row = sheet.getRow(rownum); String proName = resutList.get(index).getProName(); Cell cell = row.getCell(0); cell.setCellValue(proName); String regDayNum = resutList.get(index).getRegDayNum();// 注册人数当日 cell = row.getCell(2); cell.setCellValue(regDayNum); String regNum = resutList.get(index).getRegNum();// 注册人数累计 cell = row.getCell(3); cell.setCellValue(regNum); String loginDayNum = resutList.get(index).getLoginDayNum();// 登录人数当日 cell = row.getCell(4); cell.setCellValue(loginDayNum); String loginNum = resutList.get(index).getLoginNum();// 登陆人数累计 cell = row.getCell(5); cell.setCellValue(loginNum); String flowDayNum = resutList.get(index).getFlowDayNum();// 流程当日 cell = row.getCell(6); cell.setCellValue(flowDayNum); String flowNum = resutList.get(index).getFlowNum();// 流程累计 cell = row.getCell(7); cell.setCellValue(flowNum); String menuDayNum = resutList.get(index).getMenuDayNum();// 功能当日 cell = row.getCell(8); cell.setCellValue(menuDayNum); String menuNum = resutList.get(index).getMenuNum();// 功能累计 cell = row.getCell(9); cell.setCellValue(menuNum); } } //数据格式如下 { "successful": true, "resultValue": { "itemCount": 0, "items": [{ "id": "0", "regNum": "9", "regDayNum": "0", "loginNum": "8", "loginDayNum": "0", "flowNum": "1671", "flowDayNum": "0", "menuNum": "949", "menuDayNum": "0", "proName": "北京丰台" }, { "id": "1", "regNum": "9", "regDayNum": "0", "loginNum": "6", "loginDayNum": "0", "flowNum": "1035", "flowDayNum": "0", "menuNum": "231", "menuDayNum": "0", "proName": "北京通州" }, { "id": "2", "regNum": "5", "regDayNum": "0", "loginNum": "5", "loginDayNum": "0", "flowNum": "148", "flowDayNum": "0", "menuNum": "113", "menuDayNum": "0", "proName": "北京延庆" }, { "id": "3", "regNum": "8", "regDayNum": "0", "loginNum": "2", "loginDayNum": "0", "flowNum": "500", "flowDayNum": "0", "menuNum": "10", "menuDayNum": "0", "proName": "北京城区" }, { "id": "4", "regNum": "16", "regDayNum": "0", "loginNum": "7", "loginDayNum": "0", "flowNum": "1041", "flowDayNum": "0", "menuNum": "322", "menuDayNum": "0", "proName": "北京昌平" }, { "id": "5", "regNum": "9", "regDayNum": "0", "loginNum": "6", "loginDayNum": "0", "flowNum": "377", "flowDayNum": "0", "menuNum": "186", "menuDayNum": "0", "proName": "北京门头沟" }, { "id": "6", "regNum": "10", "regDayNum": "0", "loginNum": "6", "loginDayNum": "0", "flowNum": "396", "flowDayNum": "0", "menuNum": "528", "menuDayNum": "0", "proName": "北京大兴" }, { "id": "7", "regNum": "7", "regDayNum": "0", "loginNum": "0", "loginDayNum": "0", "flowNum": "59", "flowDayNum": "0", "menuNum": "0", "menuDayNum": "0", "proName": "北京平谷" }, { "id": "8", "regNum": "17", "regDayNum": "0", "loginNum": "5", "loginDayNum": "0", "flowNum": "963", "flowDayNum": "0", "menuNum": "250", "menuDayNum": "0", "proName": "北京朝阳" }, { "id": "9", "regNum": "10", "regDayNum": "0", "loginNum": "6", "loginDayNum": "0", "flowNum": "1234", "flowDayNum": "0", "menuNum": "168", "menuDayNum": "0", "proName": "北京海淀" }, { "id": "10", "regNum": "7", "regDayNum": "0", "loginNum": "5", "loginDayNum": "0", "flowNum": "519", "flowDayNum": "0", "menuNum": "5", "menuDayNum": "0", "proName": "北京石景山" }, { "id": "11", "regNum": "11", "regDayNum": "0", "loginNum": "6", "loginDayNum": "0", "flowNum": "258", "flowDayNum": "0", "menuNum": "567", "menuDayNum": "0", "proName": "北京亦庄" }, { "id": "12", "regNum": "11", "regDayNum": "0", "loginNum": "7", "loginDayNum": "0", "flowNum": "771", "flowDayNum": "0", "menuNum": "255", "menuDayNum": "0", "proName": "北京顺义" }, { "id": "13", "regNum": "10", "regDayNum": "0", "loginNum": "8", "loginDayNum": "0", "flowNum": "789", "flowDayNum": "0", "menuNum": "333", "menuDayNum": "0", "proName": "北京房山" }, { "id": "14", "regNum": "46", "regDayNum": "0", "loginNum": "28", "loginDayNum": "0", "flowNum": "1715", "flowDayNum": "0", "menuNum": "3356", "menuDayNum": "0", "proName": "建设咨询公司" }, { "id": "15", "regNum": "9", "regDayNum": "0", "loginNum": "8", "loginDayNum": "0", "flowNum": "214", "flowDayNum": "0", "menuNum": "185", "menuDayNum": "0", "proName": "北京怀柔" }, { "id": "16", "regNum": "9", "regDayNum": "0", "loginNum": "5", "loginDayNum": "0", "flowNum": "445", "flowDayNum": "0", "menuNum": "272", "menuDayNum": "0", "proName": "北京密云" }, { "id": "17", "regNum": "22", "regDayNum": "0", "loginNum": "217", "loginDayNum": "0", "flowNum": "1149", "flowDayNum": "0", "menuNum": "6271", "menuDayNum": "0", "proName": "其它" }, { "id": "18", "regNum": "225", "regDayNum": "0", "loginNum": "335", "loginDayNum": "0", "flowNum": "13284", "flowDayNum": "0", "menuNum": "14001", "menuDayNum": "0", "proName": "合计" }], "dicts": [] }, "resultHint": "", "errorPage": "", "type": "" }
需要强调一下 springboot的excel文件都是要放在src/main/resources下的 不能放在代码包中，
放在代码包中本地运行没有问题，但是打成jar包上生产机时excel文件会丢失，而且excel模板文件的命名最好用英文，便于代码处理，不要怕名字的问题，导出时可以将excel文件进行改名，一定要特别注意，否则会报空指针异常。
最后
以上就是陶醉未来最近收集整理的关于SpringBoot向Excel模板中写入数据并下载 （无需获取file对象及模板绝对路径！！！）的全部内容，更多相关SpringBoot向Excel模板中写入数据并下载内容请搜索靠谱客的其他文章。
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