2. /**
    3.      * 验证码方法
    4.      */
    5.     @RequestMapping("getImage")
    6.     public void getImage(HttpSession session, HttpServletResponse response) throws IOException {
    7.         //生成验证码
    8.         String code = VerifyCodeUtils.generateVerifyCode(4);
    9.         //验证码放入session
    10.         session.setAttribute("code",code);
    11.         //验证码存入图片
    12.         ServletOutputStream outputStream = response.getOutputStream();
    13.         response.setContentType("image/png");
    14.         VerifyCodeUtils.outputImage(220,60,outputStream,code);
    15.     }