写在前面:
之前一直在做CAPTCHA(the Completely Automated Public Turing Test to Tell Computers and Humans Apart,验证码)相关的研究学习工作,破解了好多网站的CAPTCHA机制,每次登录那些网站还要我输验证码,我都会在心里默念一句:“小样儿,我都把你破了,还要我输验证码是什么鬼~”。最近新开了...
分类:
Web程序 时间:
2016-05-27 11:38:09
阅读次数:
1762
方法三: 用开源组件Jcaptcha实现,与Spring组合使用可产生多种形式的验证码,JCaptcha 即为 Java 版本的 CAPTCHA 项目,其是一个开源项目,支持生成图形和声音版的验证码,在生成声音版的验证码时,需要使用到 FreeTTS。而CAPTCHA 全称 Completely A ...
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编程语言 时间:
2016-05-15 12:34:51
阅读次数:
298
什么是SysRq
It is a 'magical' key combo you can hit which the kernel will respond to
regardless of whatever else it is doing, unless it is completely locked up.
如何使能SysRq?
内核配置SysRq
若使用SysRq,需...
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其他好文 时间:
2016-05-12 23:03:32
阅读次数:
260
Refer to http://stackoverflow.com/questions/5211548/what-is-the-difference-between-at-extends-b-and-a-extends-b First of all, those are completely dif ...
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其他好文 时间:
2016-04-23 22:59:28
阅读次数:
511
tasklet is something like a very small thread that has neither stack, not context of its own. Such “threads” work quickly and completely....
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其他好文 时间:
2016-04-22 19:18:04
阅读次数:
144
Problem Description
Lindsay is a shopaholic. Whenever there is a discount of the kind where you can buy three items and only pay for two, she goes completely mad and feels a need to buy all items in t...
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其他好文 时间:
2016-04-20 02:05:24
阅读次数:
139
Linux kernel里面用到的一个叫 CFS (Completely-Fair-Scheduler)的调度算法。在网上找的描述都很不直观,很难读。但是找到了一篇很通俗易懂的(大道至简啊。。。): http://people.redhat.com/mingo/cfs-scheduler/sched ...
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系统相关 时间:
2016-04-20 00:17:09
阅读次数:
371
How can we show one string on the DOM, and a completely different string on Console log? This lesson shows how we can make our main function return mu
分类:
Web程序 时间:
2016-02-02 07:31:44
阅读次数:
133
hibernate最新发布包的javadoc里对这三个方法的解释是: clear() :Completely clear the session.清空session,该清空操作只对于要保存的、删除的和修改的数据起作用,不涉及查询的结果。 close() :End the session by r.....
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其他好文 时间:
2016-01-16 01:17:12
阅读次数:
308