Looking for logging into the Spring Security For Legacy site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Spring Security For Legacy site. After that you can login as usual with your login credentials.
https://stackoverflow.com/questions/32298663/single-signon-with-legacy-system-in-spring-security
http://forum.spring.io/forum/spring-projects/security/110799-spring-security-3-1-legacy-servlets-ajax-login
https://docs.spring.io/spring-security/site/docs/current/reference/htmlsingle/
https://dzone.com/articles/spring-boot-2-applications-and-oauth-2-legacy-appr
https://dzone.com/articles/spring-security-5-form-login-with-database-provide
https://www.upwork.com/hiring/development/spring-security-framework/
https://github.com/pivotal-legacy/spring-security-authentication-example
https://github.com/spring-cloud/spring-cloud-netflix/issues/2350
https://softwareengineering.stackexchange.com/questions/335917/how-to-migrate-existing-legacy-webapp-to-use-oauth2
https://stackabuse.com/password-encoding-with-spring-security/
https://www.baeldung.com/spring-boot-security-autoconfiguration
https://hellokoding.com/registration-and-login-example-with-spring-xml-configuration-maven-jsp-and-mysql/
https://de.slideshare.net/SpringCentral/evolve-legacy-java-ee-apps-to-spring-boot-apps-in-one-minute