Java graphic verification code generation tool class web page verification code

Recently, I made a verification code and found many problems with reference to online cases. I specially modified and improved it.

Verification code generator:

The following is the page JS call verification code

The following is the controller layer output verification code

The following is the controller layer to verify whether the verification code is entered correctly

The above is the whole content of this article. I hope it will be helpful to your study, and I hope you can support programming tips.