If you are going to be developing web applications in Java, there is no doubt you are familiar with Spring Boot, a veritable toolbox for developing web applications. The most common method of authenticating users is database authentication, where credentials are stored in a database to identify authorized users that are accessible by the application. A common open standard is SAML, which can be used to handle authentication, specifically between service providers and identity providers.
While configuring SAML auth in Spring Security is common and can be shown in many different examples, like this one from the Okta blog, it can add another layer of difficulty when continuing both database and SAML authentication methods in the same Spring Boot application. This will allow the user to be authenticated both ways, and this tutorial will show you how to find a solution!
Read the full article at http://feeds.dzone.com/link/16357/14086795/tldr-database-authentication-spring-security-saml