Springboot往模板excel中填寫數據並導出

    @Override
    public void modelexport(HttpServletResponse response) throws IOException {
//===方法一
        String templatePath=this.getClass().getClassLoader().getResource("templates/model.xlsx").getPath();
        InputStream is = new FileInputStream(new File(templatePath));
        Workbook workbook = new XSSFWorkbook(is);
        org.apache.poi.ss.usermodel.Sheet sheet =workbook.getSheetAt(0); //獲取到第一個工作表

        Row row1=sheet.createRow(1);
        row1.createCell(1).setCellValue("asdfasdfsafd");
        Row row6=sheet.createRow(6);
        row6.createCell(1).setCellValue("sdafsdafsd");
        Row row7=sheet.createRow(7);
        row7.createCell(1).setCellValue("sadfasdfsadfd");

        //清空response
        response.reset();
        //設置response的Header
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        //重要點

//        String filename = new String(fileName.getBytes(), "iso8859-1") + dateFormat.format(new Date().getTime())+".xls";
        response.addHeader("Content-Disposition", "attachment;filename=example.xlsx");
        OutputStream os = new BufferedOutputStream(response.getOutputStream());
        response.setContentType("application/vnd.ms-excel;charset=gb2312");
//            response.setCharacterEncoding("UTF-8");
        //將excel寫入到輸出流中
        workbook.write(os);
        os.flush();
        os.close();
//            log.info("設置瀏覽器下載成功！");




//===方法二

//        ClassPathResource resource = new ClassPathResource("templates/233.xlsx");
//        boolean isFile = resource.isFile();
//        if(!isFile){ //如果不存在返回
//             return;
//        }
//        String path = resource.getFile().getPath();
//        //獲取文件路徑 /* 數據寫入模板文件中 */
//        // 更改文件名編碼
//        String fileName = "ex.xlsx";
//        String gFileName = URLEncoder.encode(fileName, "UTF-8");
//        //如進行下載名爲：文件（3）.txt，下載時顯示名爲：文件+（3）.txt --空格變爲了+號
//        //解決辦法如下
//        String dFileName = gFileName.replaceAll("\\+", "%20");
//        InputStream in = null; Workbook exl = null;
//        ByteArrayOutputStream out = new ByteArrayOutputStream();
//        try {
//            in = new FileInputStream(path);
//            exl = WorkbookFactory.create(in);
//            Sheet sheet1 = exl.getSheetAt(0);
//            int rowNums = sheet1.getLastRowNum();
//            //模板的行數0開始，返回值比行數小1
//                 Row row = sheet1.createRow( 1 );
//                 row.createCell(2).setCellValue("sadfasdfgsfsafsdafafsa"); //序號
//
//                 //激活瀏覽器彈出窗口
//            response.setContentType("application/x-msdownload");
//             //瀏覽器彈出窗口顯示的文件名
//            response.addHeader("Content-Disposition", "attachment;filename=" + dFileName);
//            exl.write(out);
//            //in = new ByteArrayInputStream(out.toByteArray());
//            response.getOutputStream().write(out.toByteArray());
//        } catch (FileNotFoundException e) {
//            e.printStackTrace();
//        } catch (InvalidFormatException e) {
//            e.printStackTrace();
//        } catch (IOException e) {
//            e.printStackTrace();
//        } finally {
//            try {
//                if (exl != null) {
//                    exl.close();
//                } if (out != null) {
//                    out.close();
//                } if (in != null) {
//                    in.close();
//                }
//            } catch (IOException ex) {
//                ex.printStackTrace();
//            }
//        }

    }