java--导出数据和图片的实现_java produces 图片-优快云博客

本文详细介绍了一种基于Java的方法，用于生成二维码并将其导出为JPG格式，同时将二维码关联的数据导出到Excel表格中，包括设置编码格式、图片尺寸等参数，并通过HSSFWorkbook实现数据与图片的整合。

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我得业务角度是生成对应的二维码,导出这个二维码关联的数据以及这一个二维码.

@ApiOperation(value = "测试", produces = MediaType
            .APPLICATION_OCTET_STREAM_VALUE)
    @GetMapping("test")
    public void test(HttpServletRequest request, HttpServletResponse response) throws IOException, WriterException {
        String fileName = "测试.jpg";//图片名称
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("methodCode", "1");
        jsonObject.put("data", ""123456789"");
        String content = jsonObject.toString();//内容
        int height = 200;
        int width = 200;
        String format = "jpg";//格式
        Map<EncodeHintType,Object> hints = new HashMap<>();
        hints.put(EncodeHintType.CHARACTER_SET,"UTF-8");//设置编码格式
        hints.put(EncodeHintType.MARGIN,1);
        BitMatrix bitMatrix = new MultiFormatWriter()
                .encode(content, BarcodeFormat.QR_CODE,width,height,hints);
        Path path = FileSystems.getDefault().getPath("D://", fileName);
        MatrixToImageWriter.writeToPath(bitMatrix,format,path);//输出图片

        UserAddressExample userAddressExample = new UserAddressExample();
        userAddressExample.or().andMeasAddrIdEqualTo(measAddrId).andStateEqualTo(1);
        //数据
        List<Object> list= XXXMapper.selectByExample(XXXExample);
        try {
            //设置表头
            String[] title = {"姓名", "工号"};
            // 创建图片页
            HSSFWorkbook workbook = new HSSFWorkbook();
            HSSFSheet sheet = workbook.createSheet("测试");
            Row row;
            Cell cell;
            // 输出表头
            row = sheet.createRow(0);
            for (int i = 0; i < title.length; i++) {
                cell = row.createCell(i);
                cell.setCellValue(title[i]);
            }
            for (int i = 0; i < list.size(); i++) {
                HSSFRow row1 = sheet.createRow(i+1);
                HSSFCell cell1 = row1.createCell(0);
                cell1.setCellValue(list.get(i).getUsername());
                HSSFCell cell2 = row1.createCell(1);
                cell2.setCellValue(list.get(i).getNo());
            }
            ByteArrayOutputStream outStream = new ByteArrayOutputStream();
            // 将图片写入流中
            BufferedImage bufferImg = ImageIO.read(new File(String.valueOf(path)));
            ImageIO.write(bufferImg, "jpg", outStream);
            // 利用HSSFPatriarch将图片写入EXCEL
            HSSFPatriarch patri = sheet.createDrawingPatriarch();
            HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 0, 0,
                    (short) 0, userAddresses.size()+2, (short) (title.length), userAddresses.size()+(title.length*4)+1);
            patri.createPicture(anchor, workbook.addPicture(
                    outStream.toByteArray(), HSSFWorkbook.PICTURE_TYPE_PNG));

            sendResponseHeader(response,"测试.xls");
            OutputStream os = response.getOutputStream();
            workbook.write(os);
            os.flush();
            os.close();
            return;
        } catch (Exception e) {
            final String message = e.toString();
            e.printStackTrace();
        }
    }
    //发送响应流方法
    private void sendResponseHeader(HttpServletResponse response, String fileName) {
        try {
            try {
                fileName = new String(fileName.getBytes("gbk"),"ISO8859-1");
            } catch (UnsupportedEncodingException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            response.setContentType("application/octet-stream");
            //response.setContentType("application/octet-stream;charset=ISO8859-1");
            response.setHeader("Content-Disposition", "attachment;filename="+ fileName);
            response.addHeader("Pargam", "no-cache");
            response.addHeader("Cache-Control", "no-cache");
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }