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Auto submissions protection for HTML forms

 
Greenhorn
Posts: 14
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Hello there,


I need to develop Web application (I am using Spring for it) and I do need to have this nice feature for bunch of HTML forms which prevents auto submissions.

I mean I need this like question "type number which you see on the image", and it will not allow you to submit with properly typed image.

So the question is -- is there are any specific separate open source framework for this feauture, or may be Spring already has some kind of plugin for it?

Any advice will be helpful!!! Thanks!
 
Ranch Hand
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What you are looking for is what is called Captcha. There are a few Java captcha API's out there.

Here is one. I just grabbed the first hit off of googling for "java captcha" (without quotes). There were about 2 million results.
 
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