jcaptcha1.0.jar验证码生成包

通过此类可以自动生成验证码类创建ImageCaptchaServicecaptchaService;BufferedImageimg=captchaService.getImageChallengeForID(captchaId,request.getLocale());ImageIO.write(img,string图片扩展名,ByteArrayOutputStream);ByteArrayOutputStream转换为字节数组，然后输出到网络管道中