IDEA生成一个随机数图片

生成一张（x=250,y=150)的验证码图片 protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { //生成图片 ServletOutputStream sos = resp.getOutputStream(); //二进制通道，输出 ImageIO.write(generatePic(250, 150), JPG, sos); /