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JSP彩色验证码_MySQL

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Release： 2016-06-01 14:06:37
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验证码

　　

    生成有4个随机数字和杂乱背景的图片，数字和背景颜色会改变，服务器端刷新（用history.go(-1)也会变）
原型参考ALIBABA  http://china.alibaba.com/member/showimage

Related labels：
color number background verify
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