public class CaptchaVO extends Object
CaptchaVO()
void
writeResponseAndSetSession()
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
public CaptchaVO()
public void writeResponseAndSetSession()
captchaImage write response
将验证码设置到session
将验证码图片写入response,并设置ContentType为image/png
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