額,又應專案要求,需要將客戶配置的url生成二維碼,然後打包為zip下載
上一篇是根據url生成圖片打包下載，此篇僅僅多個根據url生成二維碼
我沉默，話不多，贏的時候才開口.上程式碼

//公共方法根據url生成二維碼圖片後寫入輸出流裡
    public static void getBarCodeImgByUrl(String url,OutputStream os) throws WriterException,IOException{
        //二維碼引數
        int width = 200; // 影象寬度  
        int height = 200; // 影象高度  
 

        String format = "png";// 影象型別  
        Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();  
        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");  
        BitMatrix bitMatrix;
        bitMatrix = new MultiFormatWriter().encode(url,BarcodeFormat.QR_CODE, width, height, hints);
        MatrixToImageWriter.writeToStream(bitMatrix, format, os);
    }

//入口
 

@RequestMapping("download")
    public void download(HttpServletRequest request, HttpServletResponse response,BcMerchantAccount userInfo,String identy){

            //通過活動標識和商戶id查詢活動
            List<info> infoList = xxService.getInfoList(XX,XX);
            if(infoList != null && infoList.size()>0
 
){
                ZipOutputStream zos = null;
                try {
                    String downloadFilename = infoList.get(0).getfileName();//檔案的名稱
                    downloadFilename = URLEncoder.encode(downloadFilename, "UTF-8");//轉換中文否則可能會產生亂碼
                    response.setContentType("application/octet-stream");// 指明response的返回物件是檔案流 
                    response.setHeader("Content-Disposition", "attachment;filename=" + downloadFilename+".zip");// 設定在下載框預設顯示的檔名
                    zos = new ZipOutputStream(response.getOutputStream());
                    for(info info:infoList ){
                        zos.putNextEntry(new ZipEntry(info.getBarCode_name()+".png"));//命名
                        getBarCodeImgByUrl(info.getUrl, zos);//拼接了url
                    }
                    zos.flush();     
                    zos.close();
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                } catch (WriterException e) {
                    e.printStackTrace();
                } finally{
                    if(zos != null){
                        try {
                            zos.flush();
                            zos.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }     

                    }

                }
            }


    }