思路：先准备好模板文件和与之对应的实体类，数据库数据等，还是之前思路，根据查出的数据，填充模板文件，生成一个临时文件，最后将这些个临时文件打包为zip返回前端，并将多个临时文件删除掉就ok了
紧接着就是copy
@Log(title = "表格管理-批量导出", businessType = BusinessType.EXPORT)@Operation(description = "下载表格")@PostMapping("/imports")public void excelimport(HttpServletResponse response, @RequestBody List<FormVo> formVo) throws IOException {response.setContentType("application/zip");response.setCharacterEncoding("UTF-8");String fileName = "/home/ag/project/files/templates/" + System.currentTimeMillis() + ".zip";response.setHeader("Content-Disposition", "attachment; filename=\"" + URLEncoder.encode(fileName, "UTF-8"));FileOutputStream fos = new FileOutputStream(fileName);ZipOutputStream zos = new ZipOutputStream(fos);ExcelWriter writer = null;ArrayList<String> o = new ArrayList<>();for (FormVo f : formVo) {// 模板文件路径 switch case部分是我的业务代码（多个不同的模板文件） 各位就不用看了，删掉即可String templateFilePath;String type = f.getType();switch (type) {case "1":templateFilePath = form;break;case "2":templateFilePath = formCao;break;case "3":templateFilePath = formLin;break;case "4":templateFilePath = formYuan;break;case "5":templateFilePath = formShui;break;case "6":templateFilePath = formJian;break;case "7":templateFilePath = formQi;break;default:throw new RuntimeException("表格类型有误");}// 创建 ExcelWriter 实例String fileName1 = "/home/ag/project/files/templates/" + System.currentTimeMillis() + "听忆计划表.xlsx";writer = EasyExcel// 写入到临时文件.write(fileName1)// 指定模板.withTemplate(templateFilePath).build();WriteSheet sheet = EasyExcel.writerSheet().build();FillConfig fillConfig = FillConfig.builder()// 开启填充换行.forceNewRow(true).build();List list = getjituan1(f, f.getType());//计算公式Workbook workbook = writer.writeContext().writeWorkbookHolder().getWorkbook();workbook.setForceFormulaRecalculation(true);// 执行填充操作writer.fill(list, fillConfig, sheet);o.add(fileName1);
// // 压缩文件writer.finish();}for (String f:o){// 压缩文件File file1 = new File(f);addFileToZip(file1, zos);
// 删除临时文件deleteFile(f);}zos.close();//将压缩文件输入流传给response输出流InputStream fileInputStream = new FileInputStream(fileName);OutputStream outputStream = response.getOutputStream();byte[] bytes = new byte[1024 * 8];int len;while ((len = fileInputStream.read(bytes)) != -1) {outputStream.write(bytes, 0, len);}outputStream.close();fileInputStream.close();}static void deleteFile(String path) {File file = new File(path);if (file.exists()) {file.delete();}}public static void addFileToZip(File file, ZipOutputStream zos) throws IOException {InputStream fileInputStream = new FileInputStream(file);//zip中要放文件称为zipEntryZipEntry zipEntry = new ZipEntry(file.getName());zos.putNextEntry(zipEntry);byte[] bytes = new byte[1024];int len;while ((len = fileInputStream.read(bytes)) > 0) {//读的内容会自动放到zip条目中，因此zipentry再输出流读完需要关闭zos.write(bytes, 0, len);}fileInputStream.close();zos.closeEntry();}
