springMVC裏返回流在前臺顯示圖片

前臺一個標籤:

<img src="${encodedContextPath}/test/image" >

就一個請求到後臺的地址.

後臺代碼:

@RequestMapping(value = "/image")
    public void    image(HttpServletResponse response){

        try {

            String codeUrl="https://www.baidu.com/";
            BufferedImage bufferedImage = code2dService.encodeQrCode(codeUrl, Config.getInt("wechat.qrcode.width", 5),
                    Config.getInt("wechat.qrcode.height", 5));

//            File file=File.createTempFile("qrcode"+System.currentTimeMillis(), ".png");
//            ImageIO.write(bufferedImage, "png", file);


            ImageIO.write(bufferedImage, "png", response.getOutputStream());

            response.setContentType("image/png");
            response.flushBuffer();

        } catch (Exception e) {
            e.printStackTrace();
            LOG.error("transform image stream error",e);
        }

    }

這裏只是個例子,能夠自行弄個流返回就行.代碼裏面   code2dService 這個是我本地的.

另外註釋那行代碼是生成一個png圖片出來.