注解形式：Spring3.2 MVC + Hibernate3.6 集成 (基础篇)

	public void regCode(HttpServletRequest request,
			HttpServletResponse response) throws IOException {
		// 配置头文件属性
		confBaseHeader(response);
		
		// 生产验证码信息
		String captchaText = CaptchaProducer.createText();
		BufferedImage captchaImage = CaptchaProducer.createImage(captchaText);
		
		OutputStream os = response.getOutputStream();
		request.getSession().setAttribute("regCode", captchaText);
		ImageIO.write(captchaImage, IMAGE_TYPE, os);
		
		closeStream(os);
	}