hi I\'m trying to follow a simple example about doing a simple login form page that i found in this page http://docs.spring.io/autorepo/docs/spring-security/4.0.x/guid
You need to add Thymleaf's Spring Security Dialect.
1.) Add the Spring Security Dialect module to your classpath.
Maven Example:
org.thymeleaf.extras
thymeleaf-extras-springsecurity3
2.1.2.RELEASE
2.) Add the SpringSecurityDialect object to your SpringTemplateEngine
import org.thymeleaf.extras.springsecurity3.dialect.SpringSecurityDialect;
templateEngine.addDialect(new SpringSecurityDialect()); //add this line in your config
Source: Spring in Action 4th Edition