默认图片展示（个人信息模块）

1.页面中展示默认图片

<img style=" 50px;height: 50px;margin: 5px" id="imgid" src="${ctx}/sys/user/getPicById?id=${user.id}"/>

2.controller层

    /*
     * 显示图片
     */
    @RequestMapping(value = {"getPicById"})
    public void getPicById(User user, HttpServletRequest request, HttpServletResponse response, Model model) {
        try {
            byte[] imgData = null;
            byte[] data =user.getPic();
            if(data!=null){
                response.setContentType("image/jpeg/bng");
                response.setCharacterEncoding("UTF-8");        
                imgData =FileUploadUtils.scaleImage( data, 100, 100);
            }else{
                //反馈默认图片
    String defaultImgPath = 
request.getSession().getServletContext().getRealPath("")+File.separator+"static"+File.separator+
"images"+File.separator+"default.JPG";
                File defaultImgFile = new File(defaultImgPath);
                byte[] temp = FileUploadUtils.getBytesFromFile(defaultImgFile);
                imgData =FileUploadUtils.scaleImage( temp, 100, 100);
            }
            if(imgData!=null){
                 OutputStream out = response.getOutputStream();
                   InputStream in = new ByteArrayInputStream(imgData);
                int len=0;
                byte[] buf = new byte[1024];
                while((len =in.read(buf,0,1024))!= -1){
                    out.write(buf,0,len);
                }
                out.close();
            }    
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }        
        model.addAttribute("user", user);        
    }
}