Spring Security - Third Edition

Conditionally displaying authentication information

Currently, our application has no indication as to whether we are logged in or not. In fact, it appears as though we are always logged in since the Logout link is always displayed. In this section, we will demonstrate how to display the authenticated user's username and conditionally display portions of the page using Thymeleaf’s Spring Security tag library. We do so by performing the following steps:

1. Update your dependencies to include the thymeleaf-extras-springsecurity4 JAR file. Since we are using Gradle, we will add a new dependency declaration in our build.gradle file, as follows:

        //build.gradle           dependency{              ...              compile 'org.thymeleaf.extras:thymeleaf-              extras-springsecurity4'         }