1、SpringBoot下实现前端验证码图片的生成和校验
https://blog.csdn.net/Colton_Null/article/details/78744240

2、SpringBoot——登录验证码实现
https://blog.csdn.net/qq_37651267/article/details/99305573

3、SpringBoot下实现前端验证码图片的生成和校验
https://www.cnblogs.com/qiantao/p/12670517.html

4、SpringBoot Spring Security5 实现验证码登录
https://liuyanzhao.com/8115.html

5、SpringBoot实现简单的登录验证码
https://www.it610.com/article/1283015419799552000.htm

6、JAVA生成验证码代码
https://www.cnblogs.com/lidedong/p/9575830.html

7、Java学习 作者：menglanyingfei/Java
https://github.com/menglanyingfei/Java/blob/master/JavaWebTrain/day_1_12/src/com/wtu/servlet/LoginServlet.java

https://github.com/menglanyingfei/Java

8、案例2——验证码登录与注销
https://blog.csdn.net/qq_36371449/article/details/80313665?utm_medium=distribute.pc_aggpage_search_result.none-task-blog-2_allsobaiduend~default-2-80313665.nonecase&utm_term=javaweb%E9%AA%8C%E8%AF%81%E7%99%BB%E5%BD%95

9、JavaWeb实现登录验证码及生成图片
https://blog.csdn.net/menglanyingfei/article/details/79101580

https://blog.csdn.net/qq_36371449/article/details/80313665

https://blog.csdn.net/qq_26641781/article/details/78180138

https://www.cnblogs.com/lidedong/p/9575830.html

https://blog.csdn.net/github_36086968/article/details/78592775