用servlet实现动态的生成验证码，点击验证码改变
用servlet实现动态的生成验证码，点击验证码改动，及验证码的校验有解决不了的,来吾爱开源看看,一定会有你需要的资料或软件,教程,补丁,源码,等(Use the servlet to dynamically generate the verification code. Click on the verification code change and the verification of the verification code. If you can't solve the problem, come to My Love Open Source to see the information or software you need, tutorials, patches, source code, etc)
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