Show user roles in HTML page without bracket

sec:authorize spring boot
thymeleaf check if user is logged in
thymeleaf extras spring
thymeleaf role based menu
form th:action=@(/login)'' method=post
thymeleaf password field
thymeleaf admin panel
thymeleaf if admin

I'm using Spring security to authenticate user in my web page. I would like to show for each user his roles without bracket. If I use

<p sec:authentication='principal.authorities'></p>

I see [ADMIN, USER]. Is there a way in thymeleaf, javascript or HTML to show only ADMIN,USER? I know that in thymeleaf there is spring replace but how can I pass the result of above code? Thanks, regards

thymeleaf-extras-springsecurity provides access to an #authentication object which can return the list of GrantedAuthorities. There will be a GrantedAuthority for each role assigned (prefixed by 'ROLE_').

You can use this to loop through and display each role (removing the ROLE_ prefix):

    <p th:each="authority : ${#authentication.getAuthorities()}"
       th:text="${authority.getAuthority().replaceFirst('ROLE_', '')}">

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Sorry, late to this thread, but here is a working solution using Thymeleaf and Thymeleaf Extras

<th:block th:each="r, iter:${#authentication.getAuthorities()}">
    <span th:text="${r}"></span>
    <th:block th:if="${!iter.last}">, </th:block>

The code above will add a comma except after the last role.

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I think you see the brackets because 'principal.authorities' is an array. Try with the jstl taglib.

<%@ taglib uri="" prefix="c" %>
<c:forEach var="item" items="principal.authorities">
   <c:out value="${item}"/>

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  • if I store in database the role without "ROLE_" I might have problems?
  • @luca I might be mistaken, but I think spring-security automatically adds the ROLE_
  • at this time I am using ADMIN and USER without problem. With this code: <p th:each="authority : ${#authentication.getAuthorities()}" th:text="${authority.getAuthority()}"> it returns all the roles. The only problems is that show elements in different <p> tag and not on the same line
  • @luca well that's simple to solve. You can use a th:block which doesn't result in any output in the generated html, and use the iterStat to add commas (apart from the last one): <p><th:block th:each="authority, iterStat : ${#authentication.getAuthorities()}"><th:block th:text="${authority.getAuthority() + (iterStat.last?'':',')}"></th:block></th:block></p>
  • yes, I see the brackets because the result is an array. is there no way to avoid jstl? I'm not using it in my project
  • If you're using Thymeleaf, you can use the th:each attribute. Example : <html xmlns="" xmlns:th=""> ... <p th:each="item : ${principal.authorities}"></p> (From Thymeleaf manual) link
  • the variable is returned through sec:authentication='principal.authorities' and if I iterato on this I receive error
  • Try declaring the variable this way: <sec:authentication property="authorities" var="auth" /> and then using it with th:each : <div th:each="item : ${auth}"> item.authority </div>
  • I made a mistake in the answer, try replacing <sec:authentication property="authorities" var="auth" /> with <sec:authentication property="principal.authorities" var="auth" />